AIRLESSCO EZ Rent 570 Airless Paint Sprayer Owner’s Manual

October 27, 2023
AIRLESSCO

AIRLESSCO EZ Rent 570 Airless Paint Sprayer Owner’s Manual

®
AIRLESS PAINT SPRAYER SERVICE/OPERATION MANUAL

AIRLESSCO EZ Rent 570 &700

001-794 Sept 08

TABLE OF CONTENTS

SECTION

FIGURES

Introduction……………………………………………………………… 1 Warnings ………………………………………………………………… 2 Flushing ………………………………………………………………….. 5 How to Flush……………………………………………………………. 5 Setting Up……………………………………………………………….. 6 Starting Up ……………………………………………………………… 6 Pressure Relief Procedure ………………………………………… 8 Daily Maintainance …………………………………………………… 8 Airless Spray Gun Operation …………………………………….. 9 Airless Spray Gun ……………………………………………………10 Airless Spray Gun Troubleshooting…………………………….11 Tip Selection Guide ………………………………………………….12 Electric Motor Maintenance……………………………………….13 Motor Brushes …………………………………………………………13 Field Troubleshooting ……………………………………………….14 Optional Manifold Filter …………………………………………….14 Servicing the Fluid Pump ………………………………………….15 Servicing the Outlet Valve …………………………………………16 Servicing the Inlet Valve……………………………………………16 Packing Replacement Procedures ……………………………..17 Gear and Pump Assembly ………………………………………..19 Lo-Boy Models ………………………………………………………. 20 Hi-Boy Models…………………………………………………………21 Suction Assemblies ………………………………………………… 22 Pressure Control Assembly Calibration …………………….. 23 Electrical System……………………………………………………. 24 Pressure Control Box ……………………………………………… 25 Replacement of Electrical Components …………………….. 26 Troubleshooting- Machine Does Not Start …………………. 27 EZ Series Quick Reference Guide ……………………………. 28 Notes ……………………………………………………………………. 29 Airlessco Accessories …………………………………………….. 30

1. Spray Gun Tip …………………………………………………….. 5 2. Pressure Control knob …………………………………………. 5 3. Flushing ……………………………………………………………… 5 4. Flushing ……………………………………………………………… 5 5 Throat Seal Oil ……………………………………………………. 6 6. Pressure Adjustment Controls……………………………….. 6 7. Gun Safety Latch …………………………………………………. 9 8. Gun Components ………………………………………………… 9 9. Spray Tip ……………………………………………………………. 9 10. Spray Tip Assembly…………………………………………….. 9 11. Airless Spray Gun……………………………………………….10 12. Motor Brushes ……………………………………………………13 13. Optional Manifold Filter………………………………………..14 14. Fluid Pump…………………………………………………………15 15. Outlet Valve ……………………………………………………….16 16. Inlet Valves ………………………………………………………..16 17. V-Packings…………………………………………………………17 18. V-Packings ………………………………………………………..18 19. Gearbox Assy …………………………………………………….19 20. Sleeve Bearing Replacement……………………………….19 21. Lo-Boy Frame Assy …………………………………………….21 22. Hi- Boy Frame Assy …………………………………………… 22 25. Lo-Boy Suction Assy …………………………………………. 23 24. Hi-Boy Suction Assy………………………………………….. 23 25. Electrical System………………………………………………. 25 26. Pressure Control Box ………………………………………… 25 27. LCD…………………………………………………………………. 26

2

INTRODUCTION
LO-BOY FRAME

Your new Airlessco “EZ Rent” Series airless paint sprayer is designed to meet the demands of the equipment rental industry and the professional painting contractor. The famous Airlessco slow-stroking stainless steel piston pump delivers extra long life for the piston, packings, valve seats and balls. The patented Triple-Life packing system is externally adjustable, extending packing life and reducing repacking costs. Its large high-torque electric motor runs slower reducing heat. The motor is fan cooled and totally enclosed to reduce brush wear and to prevent the ignition of paint fumes in the motor.

HI-BOY FRAME

Max Pressure Output (FreeFlow) Output (At Pressure)
Tip Size (1 Gun) Motor

EZ Rent 570 3000 PSI 0.86 GPM 0.57 GPM 0.025 in. DC TEFC 0.9 HP

EZ Rent 700 3000 PSI 0.96 GPM 0.68 GPM 0.027 in. DC TEFC 0.9 HP

WARNING

HANDLE THIS UNIT AS YOU WOULD A LOADED FIREARM! HIGH PRESSURE SPRAY CAN CAUSE EXTREMELY SERIOUS INJURY. OBSERVE ALL WARNINGS!

MANUAL NOTATIONS WARNING – Alerts user to avoid or correct conditions that could cause bodily injury. CAUTION – Alerts user to avoid or correct conditions that could cause damage to or destruction of equipment. IMPORTANT – Alerts users to steps or procedures that are essential to proper equipment repair and maintenance. NOTE – Identifies essential procedures or extra information.

BEFORE OPERATING THIS UNIT, READ AND FOLLOW ALL SAFETY WARNINGS AND INSTRUCTIONS RELATED TO THE USAGE OF THIS EQUIPMENT ON PAGES 2, 3 & 4. READ, LEARN, AND FOLLOW THE PRESSURE RELIEF PROCEDURE ON PAGE 8 OF THIS MANUAL.

All Service Procedures to be performed by an Authorized Airlessco Service Center ONLY. NO MODIFICATIONS or alterations of any AIRLESSCO Equipment or part is allowed. 1

WARNINGS

MEDICAL ALERT – Airless Spray Wounds
If any fluid appears to penetrate your skin, get EMERGENCY MEDICAL CARE AT ONCE. DO NOT TREAT AS A SIMPLE CUT. Tell the doctor exactly what fluid was injected. Have him read the following “NOTE TO PHYSICIAN”.

NOTE TO PHYSICIAN: Injection in the skin is a traumatic injury. It is important to treat the injury surgically as soon as possible. DO NOT DELAY treatment to research toxicity. Toxicity is a concern with some exotic coatings injected directly into the blood stream. Consultation with a plastic surgeon or reconstructive hand surgeon may be advisable.

HIGH PRESSURE SPRAY CAN CAUSE EXTREMELY SERIOUS INJURY. OBSERVE ALL WARNINGS. THIS SPRAYER IS FOR PROFESSIONAL USE ONLY.

INJECTION HAZARD
FLUIDS UNDER HIGH PRESSURE FROM SPRAY OR LEAKS CAN PENETRATE THE SKIN AND CAUSE EXTREMELY SERIOUS INJURY, INCLUDING THE NEED FOR AMPUTATION. NEVER point the spray gun towards anyone or at any part of the body. NEVER put hand or fingers over the spray tip. Do not use rag or other materials over your fingers. Paint will penetrate through material and into the hand. NEVER try to stop or deflect leaks with your hand or body. ALWAYS have gun tip guard in place when spraying. ALWAYS lock gun trigger when you stop spraying. ALWAYS remove tip from the gun to clean it. NEVER try to “blow back” paint, it’s not an air sprayer. ALWAYS follow the PRESSURE RELIEF PROCEDURE, as shown on page 8, before cleaning or removing the spray tip or servicing any system equipment. Be sure equipment safety devices are operating properly before each use. ALWAYS tighten all fluid connections before each use.
MEDICAL TREATMENT
If any fluid appears to penetrate your skin, get EMERGENCY CARE AT ONCE. DO NOT TREAT AS A SIMPLE CUT. · Go to an emergency room immediately. · Tell the doctor you suspect an injection injury. · Tell him what kind of material you were spraying with and have him read NOTE TO PHYSICIAN above.
GENERAL PRECAUTION
NEVER alter equipment in any manner. NEVER smoke while in spraying area. NEVER spray highly flammable materials. NEVER use around children. NEVER allow another person to use sprayer unless he is thoroughly instructed on its’ safe use and given this operators manual to read. ALWAYS wear a spray mask, gloves and protective eye wear while spraying. ALWAYS ensure fire extinquishing equipment is readily available and properly maintained. NEVER LEAVE SPRAYER UNATTENDED WITH PRESSURE IN THE SYSTEM. FOLLOW PRESSURE RELIEF PROCEDURES ON PAGE 8. 2

ALWAYS INSPECT SPRAYING AREA
Keep spraying area free from obstructions. Make sure area has good ventilation to safely remove vapors. NEVER keep flammable material in spraying area. NEVER spray in vicinity of open flame or other sources of ignition. Spraying area must be at least 20 ft. away from spray unit.
SPRAY GUN SAFETY
ALWAYS set safety lock on the gun in “LOCKED” position when not in use and before servicing or cleaning. DO NOT remove or modify any part of gun. ALWAYS remove spray tip when cleaning. Flush unit with LOWEST POSSIBLE PRESSURE. CHECK operation of all gun safety devices before each use. Be very careful when removing the spray tip or hose from gun. A plugged line contains fluid under pressure. If the tip or line is plugged, follow the PRESSURE RELIEF PROCEDURE as outlined on page 8.TIP GUARD
TIP GUARD
ALWAYS have the tip guard in place on the spray gun while spraying. The tip guard alerts you to the injection hazard and helps prevent accidentally placing your fingers or any part of your body close to the spray tip.
SPRAY TIP SAFETY
USE EXTREME CAUTION when cleaning or changing spray tips. If the spray tip clogs while spraying, engage the gun safety latch immediately. ALWAYS follow the PRESSURE RELIEF PROCEDURE before removing the spray tip to clean it. NEVER wipe off build up around the spray tip. ALWAYS remove tip & tip guard to clean AFTER pump is turned off and the pressure is relieved by following the PRESSURE RELIEF PROCEDURE.
WARNINGS CONTINUED ON NEXT PAGE………

WARNINGS – CONTINUED

HOSES

GROUNDING

Tighten all fluid connections securely before each use. High pressure fluid can dislodge a loose coupling or allow high pressure spray to be emitted from the coupling and result in an injection injury or serious bodily injury.
Use only hose that has a spring guard. The spring guard helps protect the hose from kinks or other damage which could result in hose rupture and cause an injection injury.
NEVER use a damaged hose, which can result in hose failure or rupture and cause in injection injury or other serious bodily injury or bodily damage. Before each use, check entire hose for cuts, leaks, abrasion or bulging of cover, or damage or movement of couplings. If any of these conditions exist, replace the hose immediately. Never use tape or any device to try to mend the hose as it cannot contain the high pressure fluid. NEVER ATTEMPT TO RECOUPLE THE HOSE. High pressure hose is not recoupleable.
Help prevent damage to the hose by handling and routing it carefully. Do not move the sprayer by pulling it with the hose.

Ground the sprayer and other components in the system to reduce the risk of static sparking, fire or explosion which can result in serious bodily injury and property damage.
ALWAYS GROUND ALL OF THESE COMPONENTS: 1. Sprayer: Connect a ground wire and clamp (supplied) to
a true earth ground. 2. Fluid Hose: use only grounded hoses. 3. Spray gun or dispensing valve: grounding is obtained
through connection to a properly grounded fluid hose and pump. 4. Object being sprayed: according to your local code. 5. All solvent pails used when flushing should only be metal pails which are conductive.
Once each week, check electrical resistance of hose (when using multiple hose assemblies, check overall resistance of unpressurized hose must not exceed 29 megohms (max) for any coupled length or combination of hose lengths. If hose exceeds these limits, replace it immediately.
Never exceed 500 Ft. (150 m.) overall combined hose length to assure electrical continuity.

LABELING
Keep all labels on the unit clean and readable. Replacement labels are available from manufacturer.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in eyes or on skin, inhaled or swallowed. Know the hazards of the fluid you are using. Store & dispose of hazardous fluids according to manufacturer, local, state & national guidelines. ALWAYS wear protective eyewear, gloves, clothing and respirator as recommended by fluid manufacturer.

KEEP CLEAR OF MOVING PARTS
Keep clear of moving parts when starting or operating the sprayer. Do not put your fingers into any openings to avoid amputation by moving parts or burns on hot parts.Precaution is the best insurance against an accident.
When starting the engine, maintain a safe distance from moving parts of the equipment.
Before adjusting or servicing any mechanical part of the sprayer, follow the PRESSURE RELIEF PROCEDURE on page 8, and remove the ignition cable from the spark plug to prevent accidental starting of sprayer.

UL RECOMENDATION FOR MINIMUM GAUGE EXTENSION CORD

AMPERAGE VOLTAGE

RATING

25

RANGE

LENGTH OF CORD IN FEET

50

100

150

200

250

300

400

500

5-6

120

18

16

12

12

10

10

8

8

6

6-8

120

18

16

12

10

10

8

6

6

6

8-10

120

18

14

12

10

8

8

6

6

4

10-12

120

16

14

10

8

8

6

6

4

4

WARNINGS CONTINUED ON NEXT PAGE………
3

WARNINGS – CONTINUED

AVOID COMPONENT RUPTURE
This sprayer operates at 3000 psi (205 bar). ALWAYS be sure that all components and accessories have a maximum working pressure of at least 3000 psi to avoid rupture which can result in serious bodily injury including injection and property damage. NEVER leave a pressurized sprayer unattended to avoid accidental operation of it which could result in serious bodily injury. ALWAYS follow the PRESSURE RELIEF PROCEDURE whenever you stop spraying and before adjusting, removing or repairing any part of the sprayer. NEVER alter or modify any part of the equipment to avoid possible component rupture which could result in serious bodily injury and property damage. NEVER use weak or damaged or non-conductive paint hose. Do not allow kinking or crushing of hoses or allow it to vibrate against rough or sharp or hot surfaces. Before each use, check hoses for damage and wear and ensure all fluid connections are secure. REPLACE any damaged hose. NEVER use tape or any device to mend the hose. NEVER attempt to stop any leakage in the line or fittings with your hand or any part of the body. Turn off the unit and release pressure by following PRESSURE RELIEF PROCEDURE. ALWAYS use approved high pressure fittings and replacement parts. ALWAYS ensure fire extinquishing equipment is readily available and properly maintained.
WARNING: Do not use halogenated solvents in this system. The prime valve, 2 gun manifold and most airless guns have aluminum parts and may explode. Cleaning agents, coatings, paints or adhesives may contain halogenated hydrocarbon solvents. DON”T TAKE CHANCES! Consult your material suppliers to be sure. Some of the most common of these solvents are: Carbontetrachloride, Chlorobenzene, Dichloroethane, Dichloroethyl Ether, Ethylbromide, Ethylchloride, Tethrachloethane. Alternate valves and guns are available if you need to use these solvents.

PREVENT STATIC SPARKED FIRE/ EXPLOSIONS
ALWAYS be sure all equipment and objects being sprayed are properly grounded. ALWAYS ground sprayer, paint bucket and object being sprayed. See “grounding” on page 3 for detailed grounding information. Vapors created when spraying can be ignited by sparks. To reduce the risk of fire, always locate the sprayer at least 20 feet (6 m.) away from the spray area. DO NOT plug in or unplug any electrical cords in the spray area, which can create sparks, when there is any chance of igniting vapors still in the air. Follow the coating & solvent manufacturers safety warnings and precautions. Use only conductive fluid hoses for airless applications. Be sure gun is grounded through hose connections. Check ground continuity in hose & equipment. Overall (end to end) resistance of unpressurized hose must not exceed 29 megohms for any coupled length or combination of hose length. Use only high pressure airless hoses with static wire approved for 3000 psi.
FLUSHING
Reduce the risk of injection injury, static sparking or splashing by following the specific cleaning procedure on page 5. ALWAYS follow the PRESSURE RELIEF PROCEDURE on page 8. ALWAYS remove the spray tip before flushing. Hold a metal part of the gun firmly to the side of a metal pail and use the lowest possible fluid pressure during flushing. NEVER use cleaning solvents with flash points below 140 degress F. Some of these are: acetone, benzene, ether, gasoline, naphtha. Consult your supplier to be sure. NEVER SMOKE IN THE SPRAYING/CLEANING AREA.

IMPORTANT: United States Government safety standards have been adopted under the Occupational Safety & Health Act. These standards, particularly the General Standards, Part 1910, & the Construction Standards, part 1926 should be consulted.
WHEN SPRAYING & CLEANING WITH FLAMMABLE PAINTS OR THINNERS:

1. When spraying with flammable liquids, the unit must be located a minimum of 25 feet away from the spraying area in a well ventilated area. Ventilation must be sufficient enough to prevent the accumulation of vapors.
2. To eliminate electrostatic discharge, ground the spray unit, paint bucket and spraying object. Use only high pressure airless hoses approved for 3000 psi which is conductive.
3. Remove spray tip before cleaning gun and hose. Make contact of gun with bucket and spray without the tip in a well ventilated area, into the grounded steel bucket.
4. Never use high pressure in the cleaning process. USE MINIMUM PRESSURE. 5. Do not smoke in spraying/cleaning area. 4

FLUSHING

1. NEW SPRAYER

5. STORAGE

Your unit was factory tested in an oil solution which was left in the pump. Before using oil-base paint, flush with mineral spirits only. Before using water-base paint flush with mineral spirits, followed by soapy water, then a clean water flush.
2. CHANGING COLORS
Flush with a compatible solvent such as mineral spirits or water.

Oil-base paint: Flush with mineral spirits.
Water-base paint: Flush with water, then mineral spirits and leave the pump, hose and gun filled with mineral spirits.
For longer storage, use mixture of mineral spirits and motor oil (half & half). Shut off the sprayer, follow PRESSURE RELIEF PROCEDURE on page 8 to relieve pressure and make sure prime valve is left open.

3. CHANGING FROM WATER-BASE TO OIL-BASE PAINT
Flush with soapy water, then mineral spirits.
4. CHANGING FROM OIL-BASE TO WATER-BASE PAINT

6. START UP AFTER STORAGE
Before using water-base paint, flush with soapy water and then a clean water flush. When using oil-base paint, flush out the mineral spirits with the material to be sprayed.

Flush with mineral spirits, followed by soapy water, then a clean water flush.

HOW TO FLUSH

FIG. 1
REMOVE SPRAY TIP

FIG. 2 PRESSURE CONTROL KNOB

FIG. 3
CLOSED (Pressure)

PRIME VALVE
OPEN (Priming & Pressure Relief

FIG. 4
MAINTAIN FIRM METAL TO METAL CONTACT BETWEEN GUN AND CONTAINER

HIGH PRESSURE

Flushing Procedure
1. Be sure the gun safety latch is engaged and there is no spray tip in the gun. Refer to Fig. 1. Refer to your separate instruction manual provided with your gun on its safety features and how to engage safety latch.
2. Pour enough clean, compatible solvent into a large, empty metal pail to fill the pump and hoses.
3. Place the suction tube into the pail or place the pail under the pump.
4. Turn pressure control knob to low. Refer to Fig. 2. 5. Open the prime valve to the open – “Priming Position”.
This will allow an easy start. Refer to Fig. 3. 6. Turn the engine ON/OFF switch to ON. 7. Point the gun into the metal pail and hold a metal part of
the gun firmly against the pail Refer to fig.4. 8. Disengage the gun safety latch and squeeze the trigger.
At the same time, slowly turn the pressure control knob clockwise just enough to move liquid at low pressure. 9. Allow the pump to operate until clean solvent comes from the gun.

WARNING: To reduce the risk of static sparking, which can cause fire or explosion, always hold a metal part of the gun firmly against the metal pail when flushing. This also reduces splashing. Refer to Fig 4.
10. Release the trigger and engage the gun safety latch. 11. If you are going to start spraying, place the pump or
suction tube into the supply container. Release the gun safety latch and trigger the gun into another empty, metal container, holding a metal part of the gun firmly against the metal pail (Fig. 4), forcing the solvent from the pump and hose. When paint starts coming from gun, turn pressure control knob to minimum pressure, place prime valve in prime (open) position and engage the gun safety latch. 12. If you are going to store the sprayer, remove the suction tube or pump from the solvent pail force the solvent from the pump and hose. Engage the gun safety latch and refer to the “Storage” Procedure above. Step 5. 13. Whenever you shut off the sprayer follow PRESSURE RELIEF PROCEDURE warning on page 8.
5

SETTING UP

1. CONNECT THE HOSE AND GUN
a. Remove the plastic cap plug from the outlet and screw a conductive or grounded 3000 psi spray hose onto fluid outlet.
b. Connect an airless spray gun to the other end of the hose, but do not install the spray tip yet!
NOTE: Do not use thread sealer on swivel unions as they are made to self seal.
2. FILL THE PACKING NUT/WET CUP
FIG. 5
Fill the Packing Nut/Wet Cup with 5 drops of Airlessco Throat Seal Oil (TSO).

3. ELECTRICAL SERVICE
Be sure the electrical service is 120 VAC, 15 amp minimum, and that the outlet you use is properly grounded. NOTE: FOR GENERATOR POWER, A MINIMUM OF 7000 WATT GENERATOR WITH VOLTAGE REGULATION MUST BE USED.
4. GROUNDING
WARNING: To reduce the risk of static sparking, fire or explosion which can result in serious bodily injury and property damage, always ground the sprayer and system components and the object being sprayed, as instructed in the safety warning section of this manual.
5. FLUSH THE SPRAYER
Follow “Flushing Procedure” on page 5 of this manual.

STARTING UP

1. LEARN THE FUNCTIONS OF THE CONTROLS.
PRIME/PRESSURE (PR) RELIEF VALVE is used to prime pump and to relieve pressure from gun, hose and tip. Prime/Pressure Relief Valve
PRESSURE CONTROL KNOB is used to adjust pressure. Turn clockwise (CW) to increase pressure and counterclockwise (CCW) to decrease pressure.

(Prime/PR Valve) Used to relieve pressure from gun, hose & tip and to primethe unit when in OPEN position. (It is in open position when there is a wider gap between valve handle and cam body.)
When in CLOSED position,there is only a very slight gapbetween handle & body. When closed the system ispressurized. Handle as a loaded firearm!

FIG. 6

PRIME/PRESSURE RELIEF VALVE (PRIME/PR VALVE): Used to relieve pressure from gun/hose/tip and to primethe unit when in OPEN position. (It is in open position when there is a wider gap between valve handle and cam body). Learn and follow the PRESSURE RELIEF PROCEDURE on page 8 of this manual. When in closed position (very slight gap) the system is pressurized and ready to spray.

PRESSURE CONTROL KNOB: used to adjust pressure only. Turn clockwise to increase pressure and counterclockwise to decrease pressure.

When you turn the valve handle and the gap between the valve handle and the cam body becomes wider – this means the valve is in the open position. It is in the closed position when the gap becomes very small.
6

ON/OFF SWITCH

CIRCUIT BREAKER

STARTING UP

2. PREPARE THE MATERIAL
a. Prepare the material according to the material manufacturer’s recommendations.
b. Place the suction tube into the material container.

WARNING
To stop the unit in an emergency, turn the engine off. Then relieve the fluid pressure in the pump and hose as instructed in the PRESSURE RELIEF PROCEDURE.

3. STARTING THE SPRAYER

5. WHEN SHUTTING OFF THE SPRAYER

a. Prime/PR Valve must be “OPEN” in the priming position.
b. When you have ensured that the gun safety latch is engaged, attach tip and safety guard.
c. Turn the engine ON/OFF switch to the “ON” position.
d. Turn Pressure Control Knob clockwise to prime the pump.
e. After the pump is primed, turn Prime/PR Valve to the “Closed” position.
f. Turn Pressure Control Knob to the desired spray pressure.
g. Disengage the gun safety latch and you are ready to spray.
4. ADJUSTING THE PRESSURE
a. Turn the Pressure Control Knob Clockwise to increase pressure and counterclockwise to decrease pressure.
b. Always use the lowest pressure necessary to completely atomize the material.
NOTE: OPERATING THE SPRAYER AT HIGHER PRESSURE THAN NEEDED, WASTES MATERIAL, CAUSES EARLY TIP WEAR, AND SHORTENS SPRAYER LIFE.
c. If more coverage is needed, use a larger tip rather than increasing the pressure.

a. Whenever you stop spraying, even for a short break, follow the PRESSURE RELIEF PROCEDURE.
b. Clean the tip & gun as recommended in the seperate Gun Manual supplied with the gun.
c. Flush the sprayer at the end of each work day, if the material you are spraying is water-based, or if it could harden in the sprayer overnight. See “Flushing”. Use a compatible solvent to flush, then fill the pump and hoses with an oil based solvent such as mineral spirits.
d. For long term shutdown or storage, refer to the “Flushing” section of this manual.
WARNING
Be sure to relieve pressure in the pump after filling with Airlessco Pump Conditioner.
AVOIDING TIP CLOGS There is an easy way to keep the outside of the tip clean from material build up:
Every time you stop spraying, for even a minute, lock the gun and submerge it into a small bucket of thinner suitable for the material sprayed.
Thinner will dissolve the buildup of paint on the outside of tip, tip guard and gun much more effectively if the paint doesn’t have time to dry out completely.

d. Check the spray pattern. The tip size and angle determines the pattern width and flow rate.

WARNING
FOLLOW THE “PRESSURE RELIEF PROCEDURE”.
To reduce the risk of injection, never hold your hand, body, fingers or hand in a rag in front of the spray tip when cleaning or checking for a cleared tip. Always point the gun toward the ground or into a waste container when checking to see if the tip is cleared or when using a self-cleaning tip.

WARNING
When you spray into the paint bucket, always use the lowest spray pressure and maintain firm metal to metal contact between gun and container.
7

PRESSURE RELIEF PROCEDURE
! IMPORTANT!
TO AVOID POSSIBLE SERIOUS BODY INJURY, ALWAYS FOLLOW THIS PROCEDURE WHENEVER THE SPRAYER IS SHUT OFF, WHEN CHECKING IT, WHEN INSTALLING, CHANGING OR CLEANING TIPS, WHENEVER YOU STOP SPRAYING, OR WHEN YOU ARE INSTRUCTED TO RELIEVE THE PRESSURE.

1. Engage the gun safety latch. Refer to the separate instruction manual provided with your gun on its safety features and how to engage safety latch.

4. Turn Prime/Pressure Relief Valve (PR Valve) to the open (priming) position to relieve residual fluid pressure.

2. Turn the unit off.
3. Disengage the gun safety latch and trigger the gun to relieve residual fluid pressure.
HOLD METAL PART OF THE GUN IN CONTACT WITH GROUNDED METAL PAIL. USE MINIMUM PRESSURE !

THERE WILL BE A WIDER GAP BETWEEN VALVE HANDLE AND CAM BODY WHEN IN OPEN POSITION. IN THE CLOSED POSITION THERE IS ONLY A VERY SLIGHT GAP. NOTE: THE VALVE HANDLE CAN MOVE BOTH CLOCKWISE AND COUNTER CLOCKWISE AND CAN FACE DIFFERENT DIRECTIONS.

5. Re-engage gun safety latch and close Prime/Pressure Relief Valve.

If the SPRAY TIP OR HOSE IS CLOGGED, follow Step 1 through 5 above. Expect paint splashing into the bucket while relieving pressure during Step 4.
If you suspect that pressure hasn’t been relieved due to damaged Prime/Pressure Relief Valve or other reason, engage the gun safety latch and take your unit to an authorized Airlessco Service Center.
DAILY MAINTENANCE
1. Keep the displacement pump packing nut/wet cup lubricated with Airlessco TSO (Throat Seal Oil) at all times. The TSO helps protect the rod and the packings.
2. Inspect the packing nut daily. Your pump has a patented Triple Life Packing System. Packing life will be extended a minimum of three times if the following “Packing Adjustment” procedure is followed:
IF SEEPAGE OF PAINT INTO THE PACKING NUT AND/OR MOVEMENT OF THE PISTON UPWARD IS FOUND (WHILE NOT SPRAYING), THE PACKING NUT SHOULD BE TIGHTENED ENOUGH TO STOP LEAKAGE ONLY, BUT NOT ANY TIGHTER. OVERTIGHTENING WILL DAMAGE THE PACKINGS AND REDUCE THE PACKING LIFE.

8

AIRLESS SPRAY GUN OPERATION

SPRAY
Attach spray gun to airless unit and tighten fittings securely. Set the gun safety latch. (Also may be called gun safety lock, or trigger lock)

FIG. 7 GUN SAFETY LATCH IN LOCKED POSITION

GUN SAFETY LATCH

  • The gun safety latch should always be set when the gun is not being triggered.

Read all warnings and safety precautions supplied with the spray gun and in product manual.

RELEASED

MAJOR COMPONENTS OF SPRAY GUN AND REVERSIBLE SPRAY TIP

FIG. 8

GUN SAFETY LATCH OR LOCK

FIG. 9

O-RING GASKET

REVERSIBLE SPRAY TIP
TIP GUARD

HANDLE (FILTER INSIDE)

METAL SEAT

REV-TIPTM REV-GUARDTM

TRIGGER GUARD

SPRAY TIP ASSEMBLY
1. Be sure PRESSURE RELIEF PROCEDURE is followed before assembling tip and housing to the gun.
2. Lock gun safety latch. 3. Insert REV-TIPTM cylinder into the
REV-GUARDTM (guard housing assembly). 4. Guide metal seat into REV-GUARDTM (guard
housing assembly) through retaining nut & turn until it seats against the cylinder. 5. Insert O-Ring gasket on metal seat so it fits in the grooves. 6. Finger tighten REV-GUARDTM retaining nut on gun. 7. Turn guard in the desired position. 8. Completely tighten the retaining nut.
FIG. 10

RETAINING NUT
REV-GUARDTM GUARD HOUSING ASSEMBLY G Thread 7/8″ 561-002 F Thread 11/16″ 561-001

O-RING GASKET Part # 561-026

REV-TIPTM CYLINDER Part # 561-XXX

METAL SEAT Part # 561-029

CLEANING SPRAY GUN
Immediately after the work is finished, flush the gun out with a solvent. Brush pins with solvent and oil them lightly so they will not collect dried paint.

CLEANING FILTER IN GUN HANDLE
To clean the filter, use a brush dipped in an appropriate solvent. Change or clean filters at least once a day. Some types of latex may require a filter change after four hours of operation.
TO REMOVE CLOGS FROM SPRAY TIP
1. Lock gun safety latch. 2. Turn REV-TIPTM handle 180 degrees. 3. Disengage trigger lock & trigger gun into pail. 4. If the REV-TIPTM handle appears locked (resists
turning), loosen the retaining nut. The handle will now turn easily. 5. Engage gun safety latch & return handle to the spray position.
RETAINING NUT
REVERSE TO UNPLUG
Spray Position Shown
CLOGGED FLAT TIP
Should the spray tip become clogged, relieve pressure from hose by following the PRESSURE RELIEF PROCEDURE. Secure gun with the safety latch, take off guard, take out the tip, soak in appropriate solvent & clean with a brush. (Do not use a needle or sharp pointed instrument to clean the tip. The tungsten carbide is brittle and can chip.)
9

AIRLESS SPRAY GUN

FIG. 11

6

7

8

5 4

3 1 2*

9

10*

11
12 13 14 15 16

19

Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
17 18 19 *

PARTS LIST FIGURE 11

Part No.

Description

120-530* Gun Seat Assembly

120-535* Gasket-Seat

120-520* Needle Assembly

120-529 Gun Seat Adapter

120-562 Trigger Guard

120-539 Pivot Trigger Pin

120-509 Gun Head

120-540 Actuator Pin (2)

120-536 Gun Plate

120-038* Nut

120-056 Plastic Washer

120-538 Gun Trigger Lock

120-055 Wave Washer

120-049 Retaining Ring

120-082 Handle Seal

120-090CX Gun Filter-Coarse

120-090FX Gun Filter-Fine

120-088 Spring

120-099 Gun Handle Assy

120-506 Gun Trigger (008 Gun)

120-534 Gun Repair Kit

10

17 18

AIRLESS SPRAY GUN TROUBLESHOOTING

DEFECTS
Coarse spray

CAUSE
Low pressure

CORRECTION
Increase the pressure

Excessive fogging (overspray)
Patten too wide

High pressure Material too thin
Spray angle too large

Reduce the pressure to satisfactory pattern distrabution Use less thinner
Use smaller spray angle tip

Pattern too narrow

Spray angle too small

too much material too little material

Nozzle too large Material too thin Pressure too high
Nozzle too small

thin distribution in center of pattern “horns” Thick skin of work
Coating fails to close & smooth over Spray pattern irregular, deflected Craters or pock marks, bubbles on work

Worn tip Wrong tip Material too viscous Application too heavy Material too viscous
Orifice clogged Tip damaged Solvent balance

Clogged screens

Extraneous material in paint Course pigments Poorly milled pigments (paint pigments glocculate)

Excess paint builds on tip guard
Drips, spits from tip
Tip clogs continually

Spray gun too close to surface Pressure setting too high
Valve seat and/or ball in gun head damaged or worn
Debris in paint Gun filter missing Coarse filter mesh

Use larger spray angle tip (if coverage is OK, try tip in same nozzle group) Use smaller nozzle
Reduce pressure Use next larger nozzle Material too thick Change to new tip Use nozzle with narrow spray angle Thin cautiously Reduce pressure and/or use tip in next smaller nozzle group Thin cautiously
Clean carefully Replace with new tip Use 1 to 3% “short solvents remainder “long” solvents (this is most likely to happen with material of low viscosity, lacquers, etc.) Clean screen Use coarse screen if orifice size allows. Use courser screen, larger orifice tips. Obtain ball milled paint. If thinner has been added, test to see if a cover screen. Incompatible drop placed on top of paint mixes or flattens out on the paint mixture & thinners on the surface. If not, try different thinner in fresh batch of paint. Hold gun further from surface sprayed
Reduce pressure setting Service spray gun, replace valve assembly
Thouroughly strain the paint before use Do not operate without inlet strainer

TEST THE PATTERN
GOOD, FULL

SPOTTY PATTERN, INCREASE PRESSURE

11

TIP SELECTION GUIDE

Spray tip selection is based on paint viscosity, paint type, & job needs. For light viscosities (thin paints), use a smaller tip; heavier (thicker paints), use a larger tip size. Spray tip size is based on how many gallons of paint per minute can

be sprayed through the tip. Do not use a tip larger than maximum pump flow rate or capacity the sprayer can accommodate. Pump flow rate is measured in gallons per minute (GPM).

REV-TIPTM for Painting (560-XXX) Fan Width (12″ from surface)

SPRAY TIP – ORIFICE SIZE (INCHES)

.029

in.

mm

.007 .009 .011 .013 .015 .017 .019 .021 .023 .025 .027 .031 .035 .039 .041

4-6

102-152

209 211 213 215 217 219 221 223 225 227 229

6-8

152-203

307 309 311 313 315 317 319 321 323 325 327

335

8-10

203-254

409 411 413 415 417 419 421 423 425 427 431

10-12

254-305

511 513 515 517 519 521 523 525 527 531 535

12-14 14-16

305-356 356-406

613 615 617 619 621 623 625 627 631 635 639 641

715 717

721

739 741, 754

16-18 20-24

406-457 508-610

815

819 821

831

NEW WIDE TIPS: W21 W23 W25 W28 W29 W31

Gun Filter

C=course-60 mesh

F

F

F F,C C

C

CC

C

F=Fine-100 mesh

Wood Interior

Lacquer, Varnish,

·

·

Stain, Sealer,

···

Enamel

··

Wood Exterior

Exterior Stain, Vinyl, Acrylic, Latex

·· ··

REMOVE FILTER

Masonry

Vinyl, Oil Base, Alkyd, Latex, Acrylic, Block Filler, Elastomer

··

· ···

········

·······

·

Ceiling Structural Steel

Hi Build, Mil White Heaviy Coatings

··

·······

·

Water Flow Rate
@ 2000psi, 138 bar
Paint Flow Rate
latex paint @ 2000psi, 138 bar/1.36 spec. gr.
Pump Minimum Output*

(gpm) (lpm) (gpm) (lpm)
(gpm) (lpm)

.12 .18 .49 .69
.10 .15 .38 .57

.24 .31 .38 .47 .57 .67 .77 1.03 1.31 1.63 .91 1.17 1.47 1.79 2.15 2.54 2.96 3.90 4.98 6.17
.21 .27 .33 .40 .49 .58 .66 .88 1.12 1.39 .79 1.02 1.25 1.51 1.85 2.20 2.50 3.33 4.24 5.26

1.80 6.81
1.54 5.83

.25 .25 .33 .40 .50 .60 .75 .88 1.0 1.25 1.5 2.0 2.2 1.0 1.0 1.25 1.5 1.9 2.3 2.8 3.3 3.8 4.7 5.7 8.2 8.2

*Pump will support tip worn to next larger size.

Thickness of the paint coat per stroke is determined by spray tip “fan width”, rate of the spray gun movement, and distance to surface. Two tips having the same tip size, but different pattern widths will deliver the same amount of paint over a different area (wider or narrower strip). A spray tip with a narrow pattern width makes it easy to spray in tight places. During use, especially with latex paint, high pressure will cause the orifice to grow larger. This destroys the pattern. Replace tips before they become excessively worn. Worn tips waste paint, cause overspray, make cutting-in difficult, and decreases sprayer performance.
12

FINE FINISH REV-TIPTM (571-XXX)
New double orifice design for lower pressure airless spraying when you need finer atomization for a smoother finish on interior trim, cabinetry, shutters, and doors

Fan Width

Inches

(mm)

4-6

102-152

6-8

152-203

8-10

203-254

Orifice Size

.012

.014

212

214

312

314

412

414

ELECTRIC MOTOR MAINTENANCE

1. LUBRICATION – This motor is supplied with prelubricated ball bearings, lubricated for the life of the bearing.
2. MOTOR BRUSHES – need periodic inspection and replacement as wear indicates. Brush wear is greatly influenced by individual application. It is recommended that brush wear be checked at early intervals of operation in order to determine future required inspection. Standard Durotech brushes have an initial length of 1″. When the brushes are worn to a length of 1/2″ they should be replaced.

TO CHANGE THE BRUSHES: 1. Unplug the machine. 2. Remove the cover over the motor (if applicable.) 3. Open the two covers at the rear of the motor. 4. Disconnect the brush wire. 5. Pull out the wire. 6. Push the brush retainer clip in and withdraw. 7. Remove the worn brushes. 8. Install new brushes in the reverse order.

For long life, new brushes (Part # 331-778 for 110 volt) need to have a run in period. After changing brushes, set the machine for spraying. With a bucket of Pump Conditioner and water, a 50′ 1/4″ airless hose, airless gun and tip on unit, open the prime valve and switch on. The pump will now prime. With pump running in the prime mode, turn the pressure control knob to high pressure. (The pump has to cycle fast with no pressure in the pump). Run the pump for 20 minutes and the brushes will be run in.

MOTOR BRUSHES
FIG. 12

331-778

13

FIELD TROUBLESHOOTING

PROBLEM

CAUSE

SOLUTION

Unit doesn’t prime
Unit primes but has poor or no pressure
Unit does not maintain good spraying pressure Unit does not run.

Airleak due to: ·Loose suction nut · Worn o-rings
· Hole in suction hose Stuck or fouled balls
Pressure set too low Filter(s) are clogged Outlet valve fouled/worn Prime/pressure relief valve bypassing Packings and/or piston worn
Blown spray tip Packings and/or pistons worn Upper seat worn
Tripped Breaker Electrical Faliure

· tighten suction nut · replace o-ring (106-018) on suction seat & o-ring (106-017)
below suction seat · replace suction hose · service inlet and outlet valves
· turn up pressure · clean or replace gun filter, inlet filter, and/or manifold filter · service outlet valve · clean or replace prime valve (100-180)
· tighten packing nut · repack unit
· replace spray tip · repack unit · replace upper seat
· reset breaker · see electrical troubleshooting

OPTIONAL MANIFOLD FILTER (111-200-99)

FIG. 13

1

2 3

4

Item No. 1

PARTS LIST FIGURE 13

Part No.

Description

111-202 Base

2

301-356 Spring

5

3

106-007 O-Ring

4

111-204 Filter 60 Mesh

6

5

111-203 Support

7

6

111-201 Base

7

100159 Swivel

8

8

100-129 Plug 3/8″ (2)

9

9

100-109 Nipple 3/8″M x 1/4″M

10

10

100-028 Plug 1/4″

14

SERVICING THE FLUID PUMP

FLUID PUMP DISCONNECT
REFER TO FIGURE 14 1. Follow the Pressure Relief Procedure on page 8. 2. Flush the material you are spraying out of the
machine. 3. Remove the connecting rod shield. 4. Move the piston rod to its lowest position by
cycling pump slowly. 5. Turn off the motor. 6. Unscrew tubing swivel (Fig. 26, item 14) from the
fluid pump. 7. Remove the retaining ring from the connecting rod
and slide the sleeve down revealing the connecting rod pin. 8. Remove the suction tube assembly from the fluid pump by unscrewing the suction nut with the packing adjustment tool (189-211). 9. Using a 1/2″ wrench unscrew the two bolts from the cover assembly. The fluid pump will be hanging loosely at this point. 10. Remove the connecting rod pin out of the connecting rod, allowing the removal of the fluid pump from the machine.
FIG. 14
12

FLUID PUMP REINSTALL
REFER TO FIGURES 14 1. Loosen the packing nut and ensure that the piston rod
is in its upper position in the fluid pump body. Slip the sleeve & the retaining ring over the piston rod. 2. Push the piston rod up into the connecting rod & align the holes. Insert the connecting rod pin through the connecting rod & piston. Slip the sleeve up over the connecting rod pin and insert the retaining ring into the groove on the connecting rod. 3. Push the two bolts through the tube spacers & screw them into the cover assembly. Using a 1/2″ wrench, tighten the two bolts evenly (alternating between them) until you reach 20 ft-lbs. 4. Reassemble lower suction valve assembly by placing the suction seat, O-ring, suction ball & suction ball guide in the suction nut & screw onto fluid pump body. 5. Attach tubing swivel to fluid pump. 6. Start the machine and operate slowly to check the piston rod for binding. Adjust the two bolts, holding the fluid pump body to the cover assembly, if necessary. This will eliminate any binding. 7. Tighten packing nut clockwise until resistance is felt against the Belleville Springs, go 3/4 of a turn more. Put five drops of Airlessco Throat Seal Oil in the packing nut. 8. Run the machine at full pressure for several minutes. Release the pressure by following the Pressure Relief Procedure & readjust the packing nut per step 6 above. 9. Install the connecting rod shield so that the small hole is in the upper right hand corner.

11 1

10

PARTS LIST FIGURE 14

2

Item No. Part No.

Description

1

119-028 Connecting Rod Pin

9

3

2

331-117 Sleeve

3

331-062 Retaining Ring

8

4

115-019 Hose Connector

5

331-034 Suction Nut

4

6

100-318 Bolts

7

5

7

331-209 Fluid Pump (Lo-Boy)

331-236 Fluid Pump (Hi-Boy)

8

331-093 Piston Rod

6

9

331-074 Tube Spacers

10

331-111 Connection Rod Shield

11

331-038 Connecting Rod

12

331-234 Cover Assembly

15

SERVICING THE OUTLET VALVE

DISASSEMBLY OF THE OUTLET VALVE

FIG. 15

1. Disconnect the Fluid Pump following instructions on page 15.
2. Place piston holder in a vise. Slide piston into the holder & lock in place with a 3/8″ dowel.
3. Use a 1/4″ allen wrench to unscrew the outlet seat retainer from the piston.
4. Remove the outlet seat, O-ring and outlet ball. 5. Inspect outlet ball & seat for wear. Replace as
necessary. Ensure seat is right side up. 6. While piston is still locked in the holder, install parts back
into the piston in the following order:

1 2
3

BALL, OUTLET SEAT AND O-RING

1

Before reinstalling the outlet seat support, apply two drops of Loctite No. 242 (blue) on the threads & torque to 20 ft-lbs.
NOTE: Airlessco LP pump tool kit 188-197 is required for this task. Kit includes: Tightening Bar (189-211), Packing Removal Tool (331-465), Piston Holder (331195), 3/8″ dowel (331-196).

4

6

5 7

SERVICING THE INLET VALVE

1. Un-thread and remove suction nut from the fluid pump body.
2. Remove suction seat, O-ring, suction ball and suction retainer.
3. Clean all parts and inspect them for wear or damage, replacing parts as needed.
4. Clean inside of the fluid pump body. 5. Reassemble lower suction valve assembly by placing the
suction seat, O-ring, suction ball & suction ball guide in the suction nut & screw onto fluid pump body.

FIG. 16

8

9 10 11 12 13 16

PARTS LIST FIGURE 15 & 16

Item No. Part No.

Description

1

331-708 Piston

2

331-195 Piston Holder

3

331-196 Dowel Pin

4

331-027 Outlet Ball

5

331-100 O-Ring

6

331-026 Outlet Seat

7

331-314 Outlet Seat Retainer

8

331-011 Fluid Pump Body

9

331-029 Suction Ball Guide

10

331-030 Suction Ball

11

106-011 O-Ring

12

331-409 Suction Seat (Lo-Boy)

331-292 Suction Seat (Hi-Boy)

13

331-034 Suction Nut

PACKING REPLACEMENT PROCEDURES

DISASSEMBLY OF THE FLUID PUMP
REFER TO FIGURE 17 & 18 1. Disconect the Fluid Pump as instructed on page 15. 2. Unscrew & remove the packing nut. 3. Push the piston rod down through the packings & out of
the pump. 4. Now push the packing removal tool up throughthe pump
& remove from the top bringing packings, spacer & springs along with it, leaving fluid body empty. *Make sure all old packings & glands have been removed from fluid pump. 5. Clean inside of fluid body. 6. Disassemble all parts & clean for reassembly. Discard any old packings. 7. Lubricate leather packing in lightweight oil for 10 minutes prior to reassembly.
REASSEMBLY
REFER TO FIGURE 17 1. Take lower male gland & place it down on the
flat side. 2. Take three of the lower polyethylene packings & two of
the leather packings & place onto the male gland inthe following order with the inverted side down POLYETHYLENE, LEATHER, POLYETHYLENE, LEATHER, POLYETHYLENE. 3. Take the female adaptor, which is inverted on both sides
, & place it on top of your assembled lower packings. 4. Follow step 2 with your packings inverted side up. 5. Take the second lower male gland and place it on top
of your assembled packings with the rounded side down. 6. Take assembled glands & packings (13 pieces) & slide onto the lower half of the piston. 7. Take the spacer & slide over the top of the piston (itdoesn’t matter which direction it sits, falling onto lower packings. 8. Take three Belleville Springs & slide over the top of the piston in the following order:
· First spring, curve facing down · Second spring, curve facing up · Third spring, curve facing down 9. Take the upper male gland & place it rounded side up. 10. Take three upper polyethylene packings & two leather packings & assemble with inverted side down, on to the male gland in the following order: polyethylene, leather, polyethylene, leather, polyethylene. 11. Take upper female gland & place on top of assembled upper packings with the inverted side down. 12. Take assembled upper glands & packings (7 pieces) & slide on over the top of the piston, making sure inverted sides are down.

(

((

13. Take the packing holder & replace the white O-ring & the black O-ring with new ones from the packing kit.
14. Slide the packing holder over the top of the upper packings so they fit inside.
15. Lubricate inside of the fluid pump body & the outside of the packings with a light weight oil.
16. Slide assembly into fluid pump body.
TO KEEP PACKINGS SECURED IN CORRECT POSITION, HOLD THE PUMP BODY UPSIDE DOWN & PUSH THE COMPLETED ASSEMBLY UPWARDS INTO THE PUMP BODY. ONCE PLACED INSIDE, TILT PUMP BODY BACK UP TO KEEP ALL PIECES IN.

17. Tighten packing nut onto the top of the fluid pump body & tighten until you feel slight resistance against the Belleville Springs. Using the Packing Adjustment Tool, tighten another 3/4 of a turn.
!8. Reinstall Fluid Pump as instructed on page 15.

PARTS LIST ON FOLLOWING PAGE

FIG. 17 21

1

20

25

2

24

19

23

22

3

18

2 17

16

1

4 15

5

14

6

7

13

11 12

8

10

9

17

PACKING REPLACEMENT PROCEDURES

FIG. 18 20*

14

19*

18*

21

25*

24*

4

22*

17 16

1
2
3*

23 1

PARTS LIST FIGURE 17 & 18

Item No. Part No.

Description

1*

331-014 Male Gland

2*

331-016 Packing Polyethylene

3*

331-308 Female Adaptor

4

331-011 Fluid Pump Body

5

331-029 Suction Ball Guide

6*

331-030 Suction Ball

7*

106-011 O-Ring

8

331-409 Suction Seat (Carry & Lo-Boy)

331-292 Suction Seat (Hi-Boy)

9

331-034 Suction Nut

10

331-314 Outlet Seat Retainer

11

331-026 Outlet Seat

12*

331-100 O-Ring

13*

331-027 Outlet Ball

18

15*

13*

11

12*

5

7*

6*

PARTS LIST FIGURE 17 & 18 CONT.

Item No. Part No.

Description

14

331-708 Piston

15*

331-018 Spacer

16*

331-025 Belleville Springs

17*

331-022 Male Gland

18*

331-023 Packing Polyethylene

19*

331-021 Female Gland

20*

331-019 Packing Holder

21

331-037 Packing Nut

22*

331-307 Packing Leather

23*

331-306 Packnig Leather

24*

106-009 White O-Ring

25*

106-010 Black O-Ring

331-210 Packing Kit

GEAR AND PUMP ASSEMBLY

FIG 19
14

15 16 17

18

1

2

5

12

6

7

10

8

13 9

11

SERVICING GEAR BOX ASSEMBLY
1. Remove fluid pump as per “Fluid Pump Disconnect” procedures on page 15.
2. Remove frame from the gearbox by loosening the four mounting screws.
3. Refer to Figure 19. Separate cover assembly from box by removing bolts from front of cover & back of box & shoulder bolts from front of cover & back of box.
4. Lay unit on its back and disassemble gearbox. 5. Inspect bearings, Crosshead Assembly, Gearcrank &
sleeve bearing inside cover assembly for wear/damage. Replace worn/damaged parts. 6. If gear grease needs replacing, replace with gear grease (Part No. 331-132). 7. Clean mating surfaces of cover and box thoroughly. Use Part No. 105-331 BLUE XSTM ADVANCED RTV SILICONE INSTANT GASKET. 8. Reassemble in reverse order.

1

2

WARNING

DO NOT OPERATE

WITHOUT COVER

GUARD IN PLACE

3

4

Item No. 1 2 3 4
5 6 7 8
9 10 11 12 13 14 15 16 17
18

PARTS LIST FIGURE 19

Part No.

Description

100-381 Bolt (2)

100-380 Shoulder Bolt (2)

331-088 Retaining Ring

331-490 Motor .60HP 331-491 Motor .90HP

331-117 Sleeve

119-028 Pin

331-062 Retaining Spring

331-209 Pump Assy (Lo-Boy) 331-236 Pump Assy (Hi-Boy)

115-019 Hose Connector (1/4NPSXNPT)

331-061 Sleeve Bearing

100-318 Bolt (2)

331-074 Tube Spacer

331-111 Shield

331-234 Cover

331-046 Bearing

331-038 Crosshead Assy

331-593 Gear Crank (570) 331-590 Gear Crank (700)

331-047 Bearing

GEARBOX SLEEVE BEARING REPLACEMENT
FIG 20
1 2
3

Item No. 1 2 3

PARTS LIST FIGURE 20

Part No.

Description

331-061 Sleeve Bearing

331-103 Washer (2)

331-197 Screw (2)

NOTE: WHEN REPLACING ITEM (1), COVER OUTSIDE OF SLEEVE WITH CLEAR SILICONE PRIOR TO INSERTING INTO COVER ASSEMBLY

19

LO-BOY MODELS

FIG. 21

1, 2, 3 4 5 6 7

8

17

16

15 14 13

12 11 10

9

Item No. 1 2 3 4 5 6 7 8 9
20

PARTS LIST FIGURE 21

Part No.

Description

331-785 Fan

331-786 Fan Cover

117-090 Fan Cover Screws (3)

117-129 Screw (2)

119-033 Nut (2)

331-477 Cup Support

331-476 Cup Assembly

143-029 Collar (2)

113-019 10″ Wheel (2)

PARTS LIST FIGURE 21 CONT

Item No. Part No.

Description

10

305-039 Spacer (2)

11

331-337 Rubber Edge (2)

12

117-044 Knob

13

111-037 Heatsink Screws (4)

14

331-323 Terminal Box

15

331-048 Rubber Boot (2)

16

100-180 Prime Valve

17

100-318 Bolts (2)

HI-BOY MODELS
FIG. 22
1 2 3 4
5

12

6

11 7

9

8

10

Item No. 1 2 3 4 5 6

PARTS LIST FIGURE 22

Part No.

Description

331-795 Motor Cover

331-788 Bolt (.9HP)

331-337 Rubber Edge

117-044 Knob

331-323 Terminal Box

111-037 Heatsink Screws

PARTS LIST FIGURE 22 CONT

Item No. Part No.

Description

7

143-029 Collar (2)

8

113-019 10″ Wheel (2)

9

113-030 Spacer (2)

10

331-048 Rubber Boot

11

100-180 Prime Valve

12

331-074 Tube Spacer (2)

21

SUCTION ASSEMBLIES

LO-BOY AND CARRY CHASSIS (331-238)
FIG. 23

HI-BOY CHASSIS (331-284)

FIG. 24

1

7

2
9 3

10

4

1

5

5 4 6

3

6

2

8

Item No. 1 2 3 4 5 6 7 8 9 10

PARTS LIST FIGURE 23

Part No.

Description

331-290 Suction Hose Assy

331-217 Inlet Strainer

331-035 Suction Elbow

331-034 Suction Nut

106-020 PTFE O-Ring

331-231 Bypass Hose Assy

331-425 Bypass Hose

331-090R Fitting

111-016 Nylon Tie

331-135 Spring Clip

22

7

Item No. 1 2 3 4 5 6 7

PARTS LIST FIGURE 24

Part No.

Description

331-090R Fitting

331-034 Suction Nut

331-292 Suction Seat Assy

301-348 Bypass Hose Assy

116-103 Spring Clip

331-400 Inlet Tube

141-008 Inlet Strainer

PRESSURE CONTOL ASSY CALIBRATION

NOTE: ANYTIME A SENSOR OR PRESSURE CONTROL ASSEMBLY (BOARD) OR BOTH ARE REPLACED, THE FOLLOWING CALIBRATIONS MUST BE PERFORMED. NOTE: PRESSURE CONTROL ASSEMBLIES (BOARDS) ARE NOW BEING EQUIPPED WITH A GREEN GROUNDING WIRE ATTACHED. CONTECT THE GROUNDING WIRE TO TERMINAL BOX USING THE SAME SCREW THAT HOLDS THE GROUNDING WIRE FROM THE POWER CORD.

1. ZERO CALIBRATION
1. Place prime/pressure relief valve in the prime (open) position.
2. Set the pressure control knob to the minimum setting (CCW).
3. Remove the screws and lower the pressure control assembly.
4. Remove any jumper on the “P-ZR” terminal. Note: This Jumper is no longer used.
5. Turn machine “ON” and ensure it is not cycling. 6. If the yellow light on the electrical board is ON and you
have “0000 ” on the LCD display, the Zero Calibration is complete no further adjustment is necessary. If the light is ON and there are numbers on the display, use an insulated screwdriver to turn the “ZERO” trimpot counter- clockwise until the light goes out. Then turn it clockwise until the yellow light comes on, continue to turn the trimpot and the numbers will reduce untill the LCD shows “0000.” The Zero Calibration is now complete. If you adjust beyond “0000 ” the numbers will start to increase.
If the digital display shows “- – -” and no yellow light, you should turn the Zero trimpot clockwise until the yellow light is on, continue turning until “0000 ” is shown.
The goal is to see “0000 ” on the digital display, this is when you have Zero Calibration. Relying on the yellow light is no longer used.
2. PRESSURE CALIBRATION
1. Complete the ZERO calibration, as per “ZERO CALIBRATION” prior to commencing this calibration.
2. Attach a 50′, 1/4″ airless hose, airless gun with 0.017 tip and a 5000 psi glycerin filled pressure gauge to pump.
3. Place the suction tube into a bucket of Coro-chek and water.
4. Turn prime/pressure relief valve to the prime (open) position.
5. Turn pressure control knob clockwise until machine starts to prime.
6. Place the prime/pressure relief valve in the pressure (closed) position.
7. While watching pressure gauge, slowly adjust the pressure trimpot (clockwise to increase and counter clockwise to decrease) until the maximum static pressure is 3000 psi, with the pressure control knob fully clockwise. Trigger the gun several times to ensure pressure returns to 3000 psi .

3. LCD DISPLAY CALIBRATION
IF SO EQUIPED 1. Complete the “ZERO CALIBRATION” and “PRESSURE
CALIBRATION” procedures prior to commencing this calibration. 2. Turn pressure control knob up until system pressure is above 2500 psi (as indicated on glycerin filled pressure gauge) and the machine is not cycling. 3. Use an insulated screwdriver to adjust the LCD Set trimpot. Turn trimpot CCW until it clicks, then adjust to match pressure against pressure gauge reading. 4. Move the pressure control knob to different settings and trigger the gun several times to ensure that the LCD continues to match the pressure gauge reading.
4. PASE LIMIT CALIBRATION
FORMERLY KNOWN AS THE LOW VOLTAGE OR MASTER VOLTAGE CALIBRATION 1. Attach a 50′, 1/4″ airless hose, airless gun with .017
tip and a 5000 psi glycerin filled pressure gauge to the pump. 2. Place the suction tube into a bucket of anti-freeze and water. 3. Turn pump on and turn up pressure control until the machine starts to prime. 4. Place the prime/pressure relief valve in the pressure (closed) position. 5. Pressurize pump to 600 psi. 6. Trigger the gun several times noting the deadband (the amount of pressure drop before the pump rebuilds to set pressure). 7. If deadband is greater than 100 psi, adjust the phase limit trimpot so that the deadband is less than 100 psi and the pressure increase after the gun trigger is released is less than 200 psi. These pressures are guidelines and may vary slightly from pump to pump. 8. Reattach pressure control assembly to unit.

23

ELECTRICAL SYSTEM – EZ SERIES

FIG. 25

6

4

7

5

BLACK/BROWN WHITE/BLUE

BLACK GREEN

BBR R L KE E K&D D
W
T

BLACK

2

A2 A1

L1

9

L2

8

3

S1 S2

INHIBIT SWITCH

1

LCD ZERO

PRESSURE

ON-SL POT P-ZR

LCD SET PHASE LIMIT SENSOR DISPLAY

Item No. 1 2 3 4 5 6
7
8 9 10 11 12 13 14 15 16

PARTS LIST FIGURE 25

Part No.

Description

331-168 Electrical Cord 110V

331-161 Strain Relief

331-138 Screw

331-311 Toggle Switch

301-084 Thermal Breaker 20A

117-035 Protective Cover

331-490 0.6HP Motor 331-491 0.9HP Motor

331-331-99 Pressure Control Assy 110V

117-207 Jumper

331-294-99 Sensor

331-297 Potentiometer

301-002 Nut

117-044 Knob

331-377 LCD Display (PSI)

115-068 O-Ring

117-452 Ground Wire

24

POWER RED LIGHT

ZERO YELLOW LIGHT

16 15

11 12

10

14

13

EZ SERIES PRESSURE CONTROL BOX (331-324)

FIG. 26

1

2, 3, 4

14 13

12

5

11

6

10

9

7, 8

Item No. 1 2 3 4 5 6 7

PARTS LIST FIGURE 26

Part No.

Description

101-482 Control Label (PSI/BAR)

301-002 Nut

115-068 O-Ring

117-044 Knob

100-109 Nipple

331-297 Potentiometer

111-037 Screw

PARTS LIST FIGURE 26 CONT

Item No. Part No.

Description

8

120-021 Nut

9

100-029 Plated Plug

10

331-161 Strain Relief, 1/2 NPT

11 331-294-99 Pressure Sensor Assy

12

100-109 Fitting

13

331-323 Terminal Box

14

119-112 Tube Assy

25

REPLACEMENT OF ELECTRICAL COMPONENTS

WARNING: ALWAYS UNPLUG THE ELECTRICAL CORD BEFORE SERVICING MACHINE! NOTE: ANYTIME THE PRESSURE CONTROL ASSEMBLY, SENSOR, OR BOTH ARE REPLACED, PERFORM THE CALIBRATIONS.

PRESSURE CONTROL ASSEMBLY (ELECTRICAL CONTROL BOARD)
1. Unplug machine’s power cord. 2. Remove four screws heatsink housing. 3. Disconnect all leads from pressure control assembly. 4. Reassemble in reverse order.
SENSOR
1. Remove the four screws, heatsink, and lower the pressure control assembly.
2. Disconnect sensor lead from the board. 3. Unscrew sensor by holding sensor with 11/16″ wrench. 4. Reassemble in reverse order.

LIQUID CRYSTAL DISPLAY (LCD)
1. Lower pressure control assembly as described above. 2. Unscrew the four nuts (6/32″) and remove LCD Display
assembly. 3. If unable to loosen the four nuts, hold them and unscrew
the four screws. Then remove the LCD Display Assembly. If the display is removed in this manner, the mylar label must be replaced. 4. Reassemble in reverse order, while making sure that the four spacers and the four washers are in place. Tighten the four nuts handtight and seal with blue loctite. DO NOT overtighten the nuts as this will damage the display.

POTENTIOMETER

1. Lower pressure control assembly as described above.

FIGURE 27

2. Disconnect potentiometer lead from pressure control

assembly.

7

1

2

3. Use a 1/16″ allen wrench, loosen set screw in the

potentiometer knob and remove knob and spacer.

5. Using a 1/2″ wrench or deep socket, remove the nut from

the potentiometer shaft assembly.

5. Pull entire potentiometer assembly out of terminal box. 6. Replace in reverse order.

3

ON-OFF TOGGLE SWITCH

6

4

1. Lower the pressure control assembly as described

above.

2. Disconnect the two wires on the toggle switch

5

3. Use a 9/16″ wrench to loosen the nut on the toggle

switch shaft.

4. Reassemble in reverse order.

FUSE HOLDER
1. Lower pressure control assembly as described above. 2. Disconnect the two wires on the holder. 3. Remove holder cover and fuse. 4. Use 11/16″ wrench to remove the nut from the holder
shaft. 5. Reassemble in reverse order.
26

Item No. 1 2 3 4 5 6
7

PARTS LIST FIGURE 27

Part No.

Description

100-362 Screw (4)

101-482 Mylar Label – Clear

331-360 Window

117-281 Spacer (4)

117-126 Nut (4)

331-377 LCD Display (PSI) 331-304-99 LCD Display Kit (PSI)

120-046 Washer (4)

TROUBLESHOOTING – MACHINE DOES NOT START

Cause Control Settings Thermal Breaker Power Source Power Source
Thermal Overload
Pressure Control Assembly (Board) Motor
Sensor
Pressure Control Knob (Potentiometer)
Pressure Control Assembly (Board)

Steps
STEP 1: After making sure that the machine is plugged into the wall, verify that the on-off switch is in the ON position and that the pressure control knob is turned all the way to the right (clockwise for maximum pressure).
STEP 2: Using your multi-meter, test the breaker for continuity or replace with a new Breaker. If the Breaker reads good, move on to step three.
STEP 3: Using a Phillips Head screwdriver, remove the four screws holding the pressure control assembly. Locate the red light on the board indicating that there is power (it will be red.) If the light is OFF proceed to step four. If the light is ON go to step six.
STEP 4: Locate the L1 and L2 terminals on the board, and then using your multi-meter check to make sure you have 110 volts AC across the two terminals (the cord wires will still be attached). If there is no voltage at these leads, there is no power getting to the machine. Check your power source (outlet, circuit fuse, extension cord, and power cord). If you have AC voltage at the L1 and L2 terminals, go to step 5.
STEP 5: Disconnect the two red motor leads (S1 & S2) and test for continuity between them. No continuity means that the thermal coupler has opened due to excessive motor heat. If the motor is still hot to the touch, allow it to cool and then retest. If the motor is cool and there is not continuity on the red leads, contact Airlessco Technical Support to repair/replace the thermal coupler. Continuity shows that the motor’s thermal coupler has not tripped. Proceed to step six.
STEP 6: If everything checks out in steps one through five and the power indicating light is still out, replace the pressure control assembly.
STEP 7: Remove the motor brush covers and turn the machine on. Set the potentiometer (POT) at maximum pressure and check for DC voltage across both brush terminals. You should read greater than 80 volts DC. IF YOU DO NOT HAVE DC VOLTAGE GO TO STEP EIGHT. If you have DC voltage, turn the machine off and unplug it from the wall. Check to make sure that the brushes are making good contact with the armature. Replace the brushes if they are less than 1/2″ long. If the brushes are good, replace the motor.
STEP 8: Plug another sensor into the board and perform the zero calibration procedure. If the machine starts to run, the sensor was bad. If there is no replacement sensor available, use a multi-meter to test the resistance across the red and black wires of the sensor (be sure to test at the plug). You should read 1.5 – 3.5k ohms. A faulty sensor usually reads no continuity (open). If the sensor passes all the tests move to step nine.
STEP 9: Plug another potentiometer (POT) into the control board. If the machine starts, the old POT is bad. When a replacement POT is not available, remove the POT lead (with the machine turned off) from the control board and test the resistance between the red and black wires (be sure to test at the plug). The resistance should read between 8-12k ohms if it is outside of this range replace the POT.
STEP 10: If you have DC voltage at the motor brushes and all of the components check out fine in steps eight and nine, replace the pressure control assembly.

27

EZ SERIES ELECTRIC PAINT SPRAYER QUICK REFERENCE GUIDE

OPERATION
Prime Pressure Relief Valve (Prime-PR Valve) Used to relieve pressure from gun, hose & tip and to prime the unit when in OPEN position. (It is in open position when there is a wider gap between handle and body).
When in the CLOSED position, there is only a very slight gap between handle & body. When the relief valve is closed the system is pressurized. Handle as a loaded firearm!
STEP
1A. Read safety rules! Read & understand all warnings & safety rules before operating equipment. Know how to lock the gun trigger safety lock before operating the equipment.
1B. Stir paint and if necessary strain paint using a paint strainer bag to remove lumps.
STEP
2A. Check gun/hose connections to make sure they are tight.
2B. Lock gun trigger safety lock (Airlessco gun shown) Note: Plug into 3 pronged grounded electrical outlet. Extension cord must be 3 wire, 12 gauge. Do not coil cord.
STEP
3A. Put pump suction tube into bucket of paint. 3B. Turn the Prime-Pressure Relief Valve to
open position (wide gap between handle & body). Turn toggle switch ON, and adjust to low pressure on the pressure control knob. The unit will now self- prime.
STEP
4A. Wait about one minute until fluid comes out of the return tube (smaller diameter tube).
4B. Turn the Prime-Pressure Relief Valve to closed position. (slight gap between handle and body) CAUTION: THE UNIT IS NOW PRESSURIZED!
STEP
Note: Leave the Prime-Pressure Relief Valve fully closed and very carefully unlock the guns trigger safety lock. 5A. Aim the gun 12″ from test surface card-
board) and spray out the storage solution. Turn thepressure control knob clockwise to increase pressure. Increase the pressure enough to atomize the paint & give a full pattern. Use the lowest pressure possible. 5B. Always keep the gun perpendicular to the surface. Move the gun at a steady rate. It is important to “trigger” the gun after gun movement has begun and release trigger before gun movement ends. 5C. Overlap half the width of each paint stroke.
STEP
6A. Release pressure when you stop spraying & before servicing gun or machine or before changing or cleaning gun tip by: 1. Lock the gun trigger safety. 2. Turn toggle switch to OFF position and unplug from electrical outlet. 3. Release gun safety lock and trigger gun to relieve residual pressure. 4. Turn Prime/PR Valve to open position. 5. Relock gun safety latch.
6B. Submerge gun in water (if using latex) or thinner (oil-base) to prevent paint from drying in the gun nozzle.
28

Pressure Control Knob Used to adjust pressure only. DOES NOT relieve pressure from gun and system! Turn clockwise to increase pressure, counterclockwise to decrease pressure.
ON/OFF Toggle Switch Turns the unit ON and OFF.

CLEANING

· Always use low pressure in the cleaning process. · Always remove spray tip before cleaning­AFTER · following the Pressure Relief Procedure!
Use a metal bucket for cleaning and maintain firm metal to metal contact of gun to the bucket.

TOOLS & EQUIPMENT NEEDED:

1. Soft bristle brush, clean-up rags. 4. Empty bucket for wastes.

2. 8″ crescent wrench for removing 5. Storage solution of Pump Conditioner

gun tip & filter in gun handle.

mixed with 1 gal. of water if using latex

3. Prepared 5 gal. bucket of soapy

OR compatible paint thinner if using

water if using latex, or mineral

oil-based paint.

spirits if using oil-based. (Second

bucket will usually be required).

STEP
1A. IMPORTANT: Relieve pressure by following the Pressure Relief Procedure, Step 6 of Operation, and be sure gun safety lock (latch) is in locked position.
1B. Remove tip and tip guard from spray gun and place in mineral spirits or water.

STEP
Note: Turn unit ON. Turn pressure control
knob to low pressure.
2A. Lift suction tube and return tube out of paint and hold over paint bucket. Any
paint remaining in the unit will return into
the bucket out through the return tube.
2B. Wipe excess paint from suction tube. 2C. Place suction tube into prepared bucket
of water or mineral spirits.

STEP
Note: Release the gun trigger lock very
carefully.
3A. Turn the Prime/PR Valve to the closed position. Adjust the pressure control
knob for minimum pressure. IMPORTANT: Never use high pressure for cleaning! 3B. Trigger gun into paint bucket to allow paint to run out of hose and gun.
3C. Place gun over empty metal bucket and trigger gun using VERY LOW
PRESSURE & maintaining firm metal
to metal contact for 3-4 minutes until
it runs clean. (Second bucket may be
required).

STEP
4A. IMPORTANT: Follow Pressure Relief Procedure Step 6A of Operation!
4B. Remove filters from suction tube and gun handle. Clean with water or mineral
spirits and soft brush and reassemble
suction and gun filter only. DO NOT reassemble gun tip and tip guard at this
point.

STEP
5A. Mix bottle of Pump Conditioner with 1 gal. of water or prepared mineral spirits and put suction tube into pail. Prime unit (Prime/PR Valve Open Position & Pressure Control Knob in low position) Trigger gun to fill the hose & gun. LEAVE this mixture in the pump & hose for storage. DO NOT DISCHARGE. Turn motor off while the suction tube remains in the bucket.
5B. Disconnect from power. 5C. Roll up hose and tape. Now reassemble
gun with spray tip and tip guard. After you have disconnected sprayer from electrical power, turn Prime/PR Valve to the closed position for storage.

NOTES
29

AIRLESSCO ACCESSORIES

Quick FlushTM
The only clean water flushing system
Cuts sprayer clean-up time in half!
Connects to standard garden hose to backflush sprayer through gun
Includes “F” and “G” adapters to work with all brands of gun

STAY CLEANTM

Spray protectant for machine to prevent paint from sticking to it. Keeps your sprayer looking new for years!

114-030

20 oz. can Case quantity: 12 cans

Part # 170-005

PAINT HOPPER
For use on small jobs where paint is kept in smaller than 5 gallon containers. Threads onto pick-up tube of carry or LoBoy framed Airlessco sprayers.
331-775 6 Liter Paint Hopper

PUMP CONDITIONER

Should be used on piston pumps between uses to prevent paint from

drying on the piston & causing pack-

ing wear.

010-001 010-009 010-019

Display of 48 – 1 oz. bottles 1 quart bottle 1 Gallon bottle

Case quantity: 12 on quarts, 4 on gallons

PAINT STRAINERS

Pre-filter your paint using strainer

bags. One dozen per pack.

100-064 100-065

Used to cover suction filter 5 Gallon strainer

HOSE COVER

4 mil poly protects your

airless hose from paint and

abrasion damage. Comes in 1000′

roll with perforations each 50′.

100-219 100-426

Hose Cover Roll Case of 6 Rolls

HIGH PRESSURE AIRLESS HOSE
Strong yet flexible, for airless sprayers up to 3300 PSI

Part No: 100-012 100-040 100-204 100-199

Hose Description
3/16″ Whip Hose, 4 Ft. 1/4″ Whip Hose, 3 Ft. 1/4″ Whip Hose, 5 Ft. 3/8″ Whip Hose, 6 Ft.

100-011 1/4″ Hose, 50 Ft. 100-023 3/8″ Hose, 50 Ft. 100-037 1/2″ Hose, 50 Ft.

100-010 1/4″ Hose Connector 100-009 3/8″ Hose Connector

For a complete listing of all available accessories see the Airlessco Accessories Catalog, Part # 001-357.

THROAT SEAL OIL
Used in the wet cup of a piston pump to prevent paint from drying on the piston & causing damage to the upper packing. Use with all piston pumps.

188-187 188-392

6 oz. Bottle 1 qt. Bottle

XTEND-A-POLE SYSTEM

Standard Tip Extension

Swivel Extension

Bare Pole

STANDARD TIP EXTENSION, “G” Thread

032-170

6″ Long

032-171

12″ Long

032-172

18″ Long

032-173

24″ Long

SWIVEL EXTENSION, “G” Thread

032-184

36″ Long

BARE POLE

Add Tip Extension or Swivel Extension to

create desired length

032-053

24″ Long

032-054

36″ Long

SWIVEL “G” THREAD 032-035-55 7/8″ x 14 Swivel

ADAPTERS
90° Pole to Gun Adapter 032-042
Gun Nut “F” Thread 11/16-16 032-010
Gun Nut “G” Thread 7/8-14 032-011 “F to G” Gun adapter to attach Graco® tips to Airlessco guns.
032-012

References

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