Craftsman 919.175260 One Stage Air Compressor Owner’s Manual

OWNERS MANUAL

MODEL NO.

919.175260

Listed
721Y
Air
Compressor

IMPORTANT:
Read the Safety Guidelines and All Instructions Carefully Before Operating

ONE STAGE AIR COMPRESSOR

ASSEMBLY OPERATION MAINTENANCE REPAIR PARTS

Record in the spaces provided.
(1) The model number which can be found on the label on the front of the air tank saddle.
(2) The code number which can be found on the foil label on the side of the air tank.
(3) The Manufacturer’s Number (ASME Code Compressors only) is located on the metal data plate which is welded onto the side of the air tank. (This data plate is painted the same color as the tank.)
(4) The Motor Manufacturer’s name which is located on the motor label.
(5) The Motor Mfg. number – also located on the motor label.
Retain these numbers for future reference.
Model No.
Code No.

Mfg. No. _____

Motor Mfg. Name __

Motor Mfg. No. ____

SI-30-11-4   7/91

Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.

FULL ONE YEAR WARRANTY ON AIR COMPRESSORS

If this air compressor fails due to a defect in material or workmanship within one year from the date of purchase, return it to the nearest Sears Service Center/Department throughout the United States and Sears will repair it, free of charge.

This warranty gives you specific legal rights and you may have other rights that vary from state to state.

Sears, Roebuck and Co., Sears Tower, Dept. 698/731 CR-2, Chicago, IL 60684

SAFETY GUIDELINES

This manual contains information that is important for you to know and understand. This information relates to protecting your safety and preventing equipment problems. To help you recognize this information, we use the following symbols. Please read the manual and pay special attention to sections headed by these symbols.

IMPORTANT SAFETY INFORMATION – A HAZARD THAT MIGHT CAUSE SERIOUS INJURY OR LOSS OF LIFE.

Information for preventing damage to equipment.

NOTE

Information that you should pay special attention to.

HAZARDS CAN OCCUR IF EQUIPMENT IS NOT USED PROPERLY.
PLEASE READ THE FOLLOWING CHART.

compressor head or tubes during or immediately after operation.
Flammable Vapors| It is normal for the motor’s electrical contacts and pressure switch contacts to spark when the compressor starts or stops. A spark can ignite flammable vapors from gasoline, flammable paints or solvents, causing an explosion or fire.| Operate the compressor in well ventilated areas that are free of gasoline, flammable paint or solvent vapors.

If spraying a flammable material – provide ample ventilation. Never spray in a closed area. There must be a flow of fresh air at all times.

Do not operate the compressor in the spray area.

Unsuitable Solvents| The solvents 1,1,1 -Trichloroethane and Methylene Chloride can chemically react with aluminum used in paint spray guns, paint pumps, etc. and cause an explosion. These solvents can also react with galvanized components and cause corrosion and weakening of parts. This does not affect your air compressor – but it may affect the equipment being used.| If the material you intend to spray contains the solvents listed at left (read the label or data sheet), do not use accessories that contain aluminum or galvanized parts. You must either change the material you intend to spray, or use only stainless steel spray equipment.
Compressed Air| Compressed air can propel dust, dirt or loose particles it comes in contact with.

Too much air pressure applied to air tools or accessories can cause damage or risk of bursting.

| Never point any nozzle or sprayer toward a person or any part of the body.

Always wear safety goggles or glasses when using the air compressor.

Always turn the air compressor off and release air pressure from hose before attaching or removing accessories.

Check the manufacturer’s maximum pressure rating for tools and accessories. The regulator outlet pressure must never exceed the maximum pressure rating.

Electricity| Your air compressor is powered by electricity. Like any other electrically powered device, if it is not used properly it can cause electrical shock.| Always turn off and lock out electrical power prior to maintenance or repair.

Wiring of the pressure switch, motor and On/ Off switch should be done by a licensed electrician in accordance with national and local codes.

Moving Parts| This compressor cycles automatically when the switch is in the “On-Auto” position. If you attempt repair or maintenance while the com-pressor is operating, or with the switch in the “On-Auto” position you can expose yourself to moving parts. These moving parts can cause serious injury or damage if they come into contact with you or your clothing.| Always turn off and lock out power before repair or maintenance.

Never operate the compressor with the belt guard removed.

Toxic Vapors| It is normal for compressed air to contain toxic or irritating vapors. Such vapors are harmful if inhaled.

Certain materials you are spraying (like paint, weed killer, sand or insecticide) can be harmful if you inhale them.

| Never directly inhale the compressed air produced by this unit.

Read labels and safety data for all materials you spray. Follow all safety precautions.

Use a mask or respirator if there is a chance of inhaling toxic sprayed materials. Masks and respirators have limits and will only provide protection against some kinds and limited amounts of toxic material. Read mask and respirator instructions carefully. Consult with a safety expert or industrial hygienist if you are not sure about the use of a certain mask or respirator.

Air Tank| Modifications to the air compressor can cause the air tank to rupture or explode.

Changing the air tank will cause it to weaken. The tank can rupture or explode.

| Do not adjust, remove or tamper with the safety valve or pressure switch. If safety valve or pressure switch replacement is necessary, a part with the same pressure rating must be used.

Never use a motor with a higher horsepower rating than the one supplied.

Do not substitute a gas engine for the motor…this compressor was not designed to be powered by a gasoline engine.

Never replace the compressor pump with a different model.

Never increase the compressor pump speed.

Never drill into, weld, or in any way modify the air tank. Do not repair a leaking tank; it must be replaced.

Never replace the air tank with a different model or a larger tank.

Vibration| If your compressor is not properly anchored it will vibrate. Excessive vibration can cause tank rupture or explosion.| Make sure your air compressor is bolted to the floor. See “Location of the Air Compressor” in this manual.

SPECIFICATION CHART

Model No.|

919.175260

---|---
Horsepower|

6

Displacement CFM at Max. Pressure|

15

Bore|

2 7/8

Stroke|

2″

Voltage – Single Phase|

220

Minimum Branch Circuit Requirement|

20 amp

*Fuse Type|

Fusetron Type “T”

Air Tank Capacity – Gallons|

60 gal ASME

Approximate Cut-in Pressure|

100 psig

Approximate Cut-out Pressure|

125 psig

SCFM @ 125 psig|

9.2

SCFM @ 90 psig|

10.2

SCFM © 40 psig|

12.5

UL Listed|

Yes

*A circuit breaker is preferred. Use only a fuse or circuit breaker that is the same rating as the branch circuit the air compressor is operated on.

GLOSSARY

CFM: Cubic feet per minute.

SCFM: Standard cubic feet per minute; a unit of measure of air delivery.

PSIG: Pounds per square inch gauge; a unit of measure of pressure.

ASME: American Society of Mechanical Engineers; made, tested, inspected and registered to meet the standards of the ASME.

UL Listed: Underwriters Laboratories; samples of compressor outfits taken from production were sub-mitted to UL and found to comply with their requirements for design and performance.

Cut-Out Pressure: When you turn on your air com-pressor and it begins to run, air pressure in the air tank begins to build. It builds to a certain high pressure before the motor automatically shuts off -protecting your air tank from pressure higher than its capacity, The high pressure at which the motor shuts off is called “cut-out pressure.”

Cut-In Pressure: While the motor is off, air tank pressure drops as you continue to use your accessory. When the tank pressure drops to a certain low level the motor will restart automatically. The low pressure at which the motor automatically re-starts is called “cut-in pressure.”

To Lock-Out Power: Place a lock on the line power switch so no one else can turn on the power.

ACCESSORIES FOR USE WITH SEARS AIR COMPRESSORS

The following accessories are available through the current general sales catalog or at full-line Sears stores.

• SPRAY GUNS

• BLOW GUNS

• AIR CAULKING GUNS

• AIR POWERED WASHER GUNS

• SAND BLASTERS

• AIR BRUSHES

• AIR LINE FILTERS

• TIRE AIR CHUCKS

• PAINT TANKS

• AIR TANKS

• INFLATOR KITS

• QUICK CONNECTOR SETS
  (various sizes)

• VISCOSIMETER

• AIR PRESSURE REGULATORS

• OIL FOG LUBRICATORS

• AIR TOOLS
  Sanders
  Drills
  Impact Wrenches
  Hammers

• AIR HOSE:
  1/4″, 5/16″ OR 3/8″ I.D. in various lengths

GENERAL INFORMATION

You have purchased an air compressor unit consisting of a 2 cylinder, single stage air compressor pump, an ASME air tank, associated controls and instruments. This air compressor must be permanently mounted in place.

Your air compressor can be used for operating paint spray guns, air tools, caulking guns, grease guns, air brushes, sandblasters, inflating tires and plastic toys, spraying weed killers, insecticides, etc. An air pressure regulator is usually necessary for most of these applications. Regulators can be purchased from most Sears stores or through the Sears General Catalog or Power Tool Catalog.

Separate air transformers which combine the functions of air regulation and/or moisture and dirt removal should be used where applicable.

DESCRIPTION OF OPERATION

Air Compressor Pump: To compress air, the pistons move up and down in the cylinders. On the downstroke, air is drawn in through the air intake filter and then through the air intake valves. The exhaust valve remains closed. On the upstroke of the piston, air is compressed. The intake valves close and compressed air is forced out through the exhaust valve, through the outlet tube, through the check valve and into the air tank. Working air is not available until the compressor has raised air tank pressure above that required at the air outlet.

Check Valve: When the air compressor is operating, the check valve is “open,” allowing compressed air to enter the air tank. When the air compressor reaches “cut-out” pressure, the check valve “closes,” allowing air pressure to remain inside the air tank, If the air is not unloaded, the motor will try to start, but will be unable to. The check valve allows the motor to re-start freely.

Pressure Switch: The pressure switch automatically starts the motor when the air tank pressure drops below the factory set “cut-in” pressure. It stops the motor when the air tank pressure reaches the factory set “cut-out” pressure.

Pressure Release Valve: The pressure release valve is designed to automatically release compressed air from the compressor head and the outlet tube when the air compressor reaches “cut-out” pressure or is shut off. If the air is not released, the motor will try to start but will be unable to. The pressure release valve allows the motor to restart freely. When the motor stops running, air will be heard escaping for a few seconds. No air should be heard leaking when the motor is running.

Safety Valve: If the pressure switch does not shut off the air compressor at or near its cut-out pressure setting, the safety valve will protect against high pressure by “popping out” at its factory set pressure (slightly higher than the pressure switch cut-out setting).

INSTALLATION AND BREAK-IN PROCEDURES

Location of the Air Compressor

Operate the air compressor in a clean, dry and well ventilated area. The air intake filter must be kept clear of obstructions which could reduce air delivery of the air compressor. The air compressor should be located at least 12″ away from walls or other obstructions that could interfere with the flow of air through the fan bladed flywheel. The air compressor crankcase and head are designed with fins to provide proper cooling. If humidity is high, a Sears air filter can be installed on the air outlet adapter to remove excessive moisture.

The air compressor should be as near to air outlets as possible in order to avoid long pipe lines. Do not place the air compressor where heat is excessive.

EXCESSIVE VIBRATION MAY WEAKEN THE AIR TANK AND CAUSE AN EXPLOSION. THE OUTFIT MUST BE MOUNTED AS DE-SCRIBED AND ILLUSTRATED BELOW.

1. CAC-1003 ISOLATOR WASHER (SUPPLIED IN PARTS KIT)
2. SS-1525-CD 3/8 FLAT WASHER (SUPPLIED ON LEGS AS PART OF PACKAGING)
3. SSF-501 3/8-LAG SCREW
4. TORQUE TO 5 TO 7 FT-LB
5. FLOOR LINE
6. LAG SCREW ANCHOR FOR CONCRETE (NOT SUPPLIED)
7. SHIM UNDER ISOLATOR WASHER IF NECESSARY (NOT SUPPLIED)

1. The air compressor must be bolted to the floor.
Bolting holes are provided in the base feet.
2. Mount the air compressor on a solid level foundation with no strain to the air tank feet. Solid shims may be used if necessary.

Piping

Plastic or PVC pipe is not designed for use with compressed air. Regardless of its indicated pressure rating, plastic pipe can burst from air pressure. Use only metal pipe for air distribution lines.

If a pipe line is necessary, use pipe that is the same size as the air tank valve. Piping that is too small will restrict the flow of air. If piping is over 100 feet long, use the next larger size. Bury underground lines below the frost line and avoid pockets where condensation can gather and freeze. Apply pressure before underground lines are covered to make sure all pipe joints are free of leaks.

Lubrication and Oil

Compressors are shipped without oil. Do not attempt to operate this air compressor with-out first adding oil to the crankcase.

Place unit on a level surface. Remove oil fill plug and slowly add a special compressor oil such as Sears 9-16426 or SAE-20-20W SF motor oil until it is even with the top of the oil fill hole. (It must not be allowed to be lower than 3/8″ – 6 threads down – from the top.) When filling the crankcase, the oil flows very slowly. If the oil is added too quickly, it will overflow and appear to be full. (Crankcase oil capacity is 16 fluid ounces.) Under winter- type conditions use SAE 10W oil. (Multi-viscosity oil – 10W30 – will leave carbon deposits on critical components reducing performance and compressor life.) Replace oil fill plug.

Wiring Instructions

IMPROPER GROUNDING CAN RESULT IN ELECTRICAL SHOCK. WIRING OF THE PRES-SURE SWITCH, ELECTRIC MOTOR AND MANUAL ON/OFF SWITCH SHOULD BE DONE BY A LICENSED ELECTRICIAN IN ACCORDANCE WITH NATIONAL AND LO-CAL CODES AND ORDINANCES.

To prevent added current draw and motor overheating we recommend the use of 12 gauge (AWG) wire, not exceeding a 70 foot length. The wire must be rated at a minimum temperature of 75° C.

When connecting wires, make sure that: (1) the electrical box is large enough; (2) service is of adequate amperage rating; (3) the supply line has the same electrical characteristics (voltage, cycles and phase) as the motor; (4) the line wire is the proper size and (5) no other equipment is operated from the same line. Various national and local codes and standards have been set up covering electrical apparatus and wiring. These should be consulted and observed. Our recommended wire sizes may be smaller than the minimum set up by local ordinances. If so, the larger size wire should be used to prevent excessive line voltage drop. For wiring instructions, see the diagram inside the pressure switch cover.

1. WALL MOUNTED JUNCTION BOX OR DISCONNECT
2. LIQUIDTITE FLEXIBLE METAL CONDUIT WITH GROUND LEAD
3. CONDUIT ELBOW

Electrical wiring must be located away from hot surfaces such as the compressor head, compressor cylinder or compressor outlet tube.

Break-In Procedures

Serious damage may result if the following break-in instructions are not closely followed.

This procedure is required only once; before the air compressor is put into service.

1. Recheck compressor wiring. Make sure wires are secure at all terminal connections. Free all contacts of loose wire cuttings, etc.
2. Check oil level in the crankcase before operation. The oil level should be even with the top of the fill hole and must not be allowed to be lower than 3/8″ (six threads down) from the top at any time. Add oil if level is low.
3. Open the outlet valve fully, to permit air to escape and to prevent pressure build-up in the air tank.
4. Turn ON the air compressor.
5. Run the air compressor for 30 minutes to seal the rings and lubricate all internal surfaces.
6. Check all air line fittings and connections/piping for air leaks by app lying a soap solution. Correct as necessary. Even minor leaks can cause this air compressor to overwork, resulting in premature break-down or inadequate performance.
7. Check for excessive vibration and noise. Adjust air compressor belt guard as necessary to eliminate chatter. Re-adjust or shim the air compressor feet, if necessary for proper level.
8. Close the outlet valve and let the air compressor pump up to cut-out pressure. Turn the air com-pressor off and check oil level. Add oil if necessary. Connect the air hose to the air outlet adapter.

Your compressor is now ready for use.

OPERATING PROCEDURES

1. Before attaching an air hose or accessory, make sure the Globe Valve OFF/AUTO lever is in the “OFF” position.
2. Attach hose and accessory.

TOO MUCH AIR PRESSURE CAUSES A HAZARDOUS RISK OF BURSTING. CHECK THE MANUFACTURER’S MAXIMUM PRES-SURE RATING FOR AIR TOOLS AND AC-CESSORIES. THE REGULATOR OUTLET PRESSURE MUST NEVER EXCEED THE MAXIMUM PRESSURE RATING.

Compressed air from the outfit may contain water condensation and oil mist. Do not spray unfiltered air at an item that could be dam-aged. Some air operated tools or devices may require filtered air. Read the instructions for the air tool or device.

3. Turn the compressor on and allow tank pressure to build. The motor will stop when tank pressure reaches cut-out pressure.

Your outfit is ready for use.

MAINTENANCE

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN OCCUR. BEFORE PERFORMING MAINTENANCE OR REPAIR, TURN OFF AND LOCK OUT ELECTRIC POWER AND BLEED OFF AIR TANK PRESSURE. NEVER OPERATE THE COMPRESSOR WITH THE BELT GUARD REMOVED.

Air Compressor

A clean air compressor runs cooler and provides longer service. Clean or blow off fins and any other parts of the air compressor that collect dust or dirt. Do not place rags, containers or other material on or against the ventilation openings in the belt guard. Adequate ventilation is necessary to maintain proper air compressor operating temperature.

Air Filter – Inspection and Replacement

NOTE

Keep the air filter clean at all times. Do not operate the compressor with the air filter removed.

A dirty air filter will not allow the compressor to operate at full capacity. Before you use the compressor, check the air filter to be sure it is clean.

If it is dirty, remove the screws and filter retainer. Pull out the filter, replace with new.

Oil – Checking and Changing

Overfilling with oil will cause premature corn-pressor failure. Do not overfill.

Check oil level in the crankcase daily. The oil level should be even with the top of the fill hole and must not be allowed to be lower than 3/8″ from the top (6 threads) at any time. It is recommended that the oil be changed after every 100 hours of operation. To drain the oil, remove the oil drain plug and collect the oil in a suitable container. Be sure to replace the plug securely before adding new oil. Use a special com-pressor oil such as Sears 9-16426 or SAE-20-20W SF motor oil. (Crankcase oil capacity is 16 fluid ounces.) Under extreme winter conditions use 10 weight oil.

Air Tank – Draining Water

WATER WILL CONDENSE IN THE AIR TANK. IF NOT DRAINED, THE WATER WILL COR- RODE AND WEAKEN THE AIR TANK CAUS-ING A RISK OF AIR TANK RUPTURE.

Water should be drained from the air tank after each use. Operate the unit to apply 15-20 PSIG and open the drain cock. Continue operating unit until all moisture is removed from the air tank. Close the drain cock tightly.

NOTE

If drain cock valve is clogged, release air pressure in air tank. The drain cock valve can then be removed, cleaned and reinstalled.

Check Valve – Inspection and Replacement

Remove the check valve for inspection or replacement if air tank pressure will not build up. Use the following procedure to inspect, clean or replace the check valve.

1. Release air pressure from the air tank.
2. Loosen the top and bottom nuts and remove the outlet tube.
3. Unscrew the check valve (turn counterclockwise) using a 7/8″ diameter 1 /2″ socket wrench.
4. Check that the valve disc moves freely inside the check valve and that the spring holds the disc in the upper, closed position. The check valve may be cleaned with a solvent.
5. Apply sealant to the check valve threads. Reinstall the check valve (turn clockwise). The valve stem should still move freely – do not over tighten.
6. Replace the outlet tube and tighten top and bottom nuts.

Safety Valve – Inspection

IF THE SAFETY VALVE DOES NOT WORK PROPERLY OVER-PRESSURIZATION MAY OCCUR, CAUSING AIR TANK RUPTURE OR EXPLOSION. OCCASIONALLY PULL THE RING ON THE SAFETY VALVE TO MAKE SURE THAT THE SAFETY VALVE OPER-ATES FREELY. IF THE VALVE IS STUCK OR DOES NOT OPERATE SMOOTHLY, IT MUST BE REPLACED VVITH THE SAME TYPE OF VALVE.

Motor

The motor has a thermal overload protector. If the motor overheats for any reason, the overload protector will shut off the motor. The motor must be allowed to cool down before restarting. De-energize power supply. To re start, depress the reset button located on the end of the motor and energize the power supply.

NOTE

If the overload protector shuts the motor off frequently, check for a possible voltage problem. Low voltage can also be suspected when:

1. the motor does not get up to full power or speed;
2. fuses blow out when the motor is started;
3. lights dim when motor is started and remain dim while it is running.

Belt – Replacement

SERIOUS INJURY OR DAMAGE MAY OC-CUR IF PARTS OF THE BODY OR LOOSE ITEMS GET CAUGHT IN MOVING PARTS. NEVER OPERAT E THE COMPRESSOR WITH THE BELT GUARD REMOVED. THE BELT GUARD SHOULD BE REMOVED ONLY WHEN THE POWER TO THE COMPRESSOR IS DIS-CONNECTED.

The motor is mounted on an adjustable motor base.

To replace belt:
1. Turn off and lock out power source.
2. Remove screws from the back of the belt guard.
3. Loosen the four motor mounting screws.
4. Slide the motor toward the compressor pump.
5. Remove belt and replace.

NOTE

The belt should be centered over the grooves on the flywheel and motor pulley.

6. Push the motor back into regular position and tighten bolts securely. Proper tension is approximately 1 /4″ belt deflection measured midway between the pulley and flywheel when a 3 pound weight or equivalent finger pressure is applied at this point. A loose belt will squeal at compressor start-up.
7. Replace beltguard and screws.

Pulley and Flywheel – Alignment

The compressor flywheel and motor pulley must be inline (in the same plane) within 1 /16″ to assure belt retention within sheave grooves. The motor mounting holes on the saddle are skewed to square the motor with the compressor mounting hole as the belt is tensioned. To check alignment, disconnect electrical power and remove the belt guard. Place a straight-edge against the outside of the flywheel and measure the distance from it to the nearest groove. Alignment is achieved when the other end of the straightedge is within 1 /16″ of the measured dimension at the pulley grooves. Squareness is achieved when the pulley grooves are an equal distance from the straightedge on both sides of the motor shaft.

TROUBLESHOOTING GUIDE

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN OCCUR. BEFORE PERFORMING MAINTENANCE OR REPAIR, TURN OFF AND LOCK OUT ELECTRIC POWER AND BLEED OFF AIR TANK PRESSURE. NEVER OPERATE THE COMPRESSOR WITH THE BELT GUARD REMOVED.

must be replaced.
Air leaks at fittings or hose.| Tube or hose fittings are not tight enough.| Tighten fittings where air can be heard escaping. Check fittings under soapy water solution. DO NOT OVER-TIGHTEN.
Air leaks at check valve.| Defective or dirty check valve.| Remove and clean or replace check valve. DO NOT OVER-TIGHTEN.
Air leaks at pressure switch release valve.| Defective pressure switch release valve.| Remove and replace the release valve.
Air leaks at air tank welds.| Defective air tank.| Air tank must be replaced.

DO NOT DRILL INTO, WELD OR OTHER-WISE MODIFY AIR TANK. IT WILL BE WEAKENED.

Air leak from safety valve.| Possible defect in safety valve.

Restricted check valve.

Loose pulley.

Low oil level.

Loose flywheel.

Loose compressor bolts.

Loose belt.

Carbon build-up.

| Operate safety valve manually be pulling on ring. If valve still leaks, it should be replaced.

Remove and clean or replace.

Tighten pulley set screw.

Maintain prescribed oil level.

Tighten screw.

Check bolts. Tighten as required.

Tighten belt as per instructions under Belt Replacement above.

Remove the head and valve plate. Clean the valve plate and the top of the piston. (Be sure carbon does not fall into the cylinder.) Reassemble to 25-30 ft.lbs. using new gasket and torque screws.

Motor will not run.| Motor overload protection switch has tripped.

Tank pressure exceeds pressure switch “cut-in” pressure.

Check valve stuck – fails to relieve head pressure; motor cannot start.

Loose electrical connections.

Possible defective capacitor.

Possible defective motor.

Fuse blown, circuit breaker tripped.

Pressure release valve on pressure switch has not unloaded head pressure.

| Let the motor cool off and reset switch by pressing the red button located on the end of the motor.

Motor will start automatically when tank pressure drops below “cut-in” pressure of pressure switch.

Remove and clean or replace. (Do not overtighten.)

Check wiring connection inside pressure switch and terminal box area.

Return to Sears Service Center for inspection or replacement if necessary.

Have checked at a local Sears Service Center.

1. Check fuse box for blown fuse and replace if necessary. Re-set circuit breaker. Do not use a fuse or circuit breaker with higher rating than that specified for your particular branch circuit.
2. Check for proper fuse; only “Fusetron” Type T fuses are acceptable. 
3. Check for low voltage conditions. 
4. Remove check valve and clean or replace if it is stuck open or closed.
5. Disconnect the other electrical appliances from circuit or operate the compressor on its own branch circuit.

Bleed the line by pushing the lever on the pressure switch to the “OFF” position, opening the pressure release valve. If the valve still doesn’t open, it must be replaced.

Restricted air intake.| Dirty air filter.| Replace with new.
Compressor is not supplying enough air to operate accessories.| Prolonged excessive use of air.

Compressor is not large enough for air requirement.

Restricted air intake filter.

Loose belt.

Hole in hose.

Check valve restricted.

Air leaks.

| Decrease amount of air usage.

Check the accessory air requirement. If it is higher than the pressure supplied by your air compressor, you need a larger compressor.

Replace air intake filter.

Adjust belt tension.

Check and replace if required.

Remove and clean or replace.

Tighten fittings. (See Air Leaks Section of Trouble-shooting Guide.)

Excessive belt wear.| Loose belt.

Tight belt.

Loose pulley.

| Adjust tension.

Adjust tension.

Check for worn keyway or pulley bore. Also check for bent motor shaft. Replace parts if necessary.

Squealing sound.| Loose belt.

There is no oil in the compressor.

| Adjust belt tension.

Add oil.

AIR COMPRESSOR DIAGRAM

a) (Model No. shown here)

PARTS LIST

inclusive)

COMPRESSOR PUMP DIAGRAM

a) (oil fill plug)
b) (oil drain plug)

PARTS LIST

(2 used on head)
■  51| SSF-9821| Screw (8 used)
52| CAC-294| Restrictor Plate (2 used)
■  53| 265-196| Flapper Valve with Corner Bevels
(2 used on valve plate)
54| CAC-4212| Valve Plate Assembly (includes 4 ea. Key #51 & 2 ea. Key #52 & 53)
  55| CAC-54-1| Valve Plate Gasket
+  56| CAC-56| Compression Ring (4 used)
+  57| CAC-58| Oil Ring (4 used)
+  58| CAC-57| Oil Ring Expander (2 used)
59| CAC-55| Piston (2 used)
60| 265-19| Piston Pin (2 used)
61| CAC-207| Piston Pin Plug (4 used)
62| 265-410| Connecting Rod Assembly (2 used). Includes two SSF-927 screws.
63| SSF-927| Screw 1/4″-20 x 1-1/8″ (4 used)
64| CAC-51| Crankcase and Cylinder
65| 265-41| Needle Bearing
66| SSP-1413| Oil Fill/Drain Plug (2 used) (1/4″ NPT)
67| SSF-925| Cap Screw 1/4″-20 x 7/8″ (12 used)
68| 265-3| Base
  69| 265-16| Base Gasket
70| CAC-373| Crankshaft
71| 265-23| Needle Bearing
  72| 265-13| End Plate Gasket
73| 265-9| End Plate
74| 265-2| Flywheel
75| SSN-1014-ZN| Washer
76| STD541437| Screw
  77| 265-111| Oil Seal
*  78| 265-6| Vent Filter
79| CAC-4205| Cord Assy.
| NOT SHOWN|
| SI-30-11-4| Owners Manual

Parts Ordering Information

+  Key No. 56, 57, 58 only available in Ring Kit KK-4313.
•   Key No. 19, pressure release valve and nut is available as part of Kit KK-4315.
■  Key No. 50, 51 and 53 only available in Valve Kit KK-4275.
*   Key No. 46, 49, 55, 69, 72, 77 and 78 are available in Gasket Kit KK-4312-2.

OWNERS MANUAL

SERVICE

MODEL NO.
919.175260

HOW TO ORDER REPAIR PARTS

ONE STAGE AIR COMPRESSOR

Now that you have purchased your Sears Air Compressor, should a need ever exist for repair parts or service, simply contact any Sears Service Center and most Sears, Canada, Inc. stores. Be sure to provide all pertinent facts when you call or visit.

The model number of your Sears Compressor is 919.175260. This number can be found on the label which is located on the front of the air tank saddle.

WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION:

• PART NUMBER                • PART DESCRIPTION

• MODEL NUMBER           • NAME OF ITEM

If service or repair parts are required for the motor, supply all motor nameplate information including manufacturer’s name.

All parts listed may be ordered from any Sears Service Center and most Sears stores.

If the parts you need are not stocked locally, your order will be electronically transmitted to a Sears Repair Parts Distribution Center for handling.

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Sears, Roebuck and Co., Chicago, IL 60684 U.S.A.

Printed in U.S.A.

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