AMT 3HY13HR HY Self Priming Pump Instructions

3HY13HR HY Self Priming Pump

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Product Specifications

• Suction Inlet: 3HY = 3 Male NPT, 4HY = 4 Male
  NPT

• Discharge Outlet: 3HY = 3 Male NPT, 4HY = 4
  Male NPT

• Overall Dimensions (Length x Width x Height):
  3HY = 32 x 32 x 25, 4HY = 50 x 32 x 25

• Engine and Fuel Tank Size: 3HY13HR = Honda
  GX390, 6.9 quarts, 4HY23HR = Honda GX690, 15 gallons

Product Description

This is a single stage centrifugal pump designed for
agricultural and general dewatering service. It is close coupled to
an internal combustion engine and protected by a steel roll frame
equipped with four lift/carry handles. The pump construction is
rugged and allows for easy maintenance. The unit will self-prime to
20 feet with the casing filled with liquid. It is designed to
handle clean water and water containing small solids.

Liquid Temperature and Pressure

• Liquid Temperature Range: 40°F to 180°F
  maximum (4°C to 80°C)

• Maximum Casing Pressure: 95 psi (650 kPa)

Usage Instructions

1. Assembly:

   • Refer to the repair parts explosion and repair parts list for
     reference numbers.

   • Follow the instructions for Roll Frame Handle Assembly and
     Rubber Feet Assembly.

2. Unpacking:

   • Refer to repair parts illustrations and lists to identify pump
     components.

   • Unpack and separate all pump components from shipping
     materials, ensuring all parts are accounted for.

Frequently Asked Questions (FAQ)

Q: What should I do if I notice leaks or loose bolts on the

pump?

A: Periodic maintenance and inspection are required to ensure
proper operation. Clear the unit of debris and sediment, inspect
for leaks and loose bolts. Failure to do so voids the warranty.

Q: What type of liquids can the pump handle?

A: The pump is designed for use with nonflammable liquids that
are chemically compatible with the pump component materials. It can
handle clean water and water containing small solids.

Q: What is the self-priming capability of the pump?

A: The unit will self-prime to 20 feet with the casing filled
with liquid.

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Specifications Information and Repair Parts Manual

3HY13HR 4HY23HR

Please read and save this Repair Parts Manual. Read this manual and the General Operating Instructions carefully before attempting to assemble, install, operate or maintain the product described. Protect yourself and others by observing all safety information. The Safety Instructions are contained in the General Operating Instructions. Failure to comply with the safety instructions accompanying this product could result in personal injury and/or property damage! Retain instructions for future reference. AMT reserves the right to discontinue any model or change specifications at any time without incurring any obligation.
©2024 AMT Pump Company, A Subsidiary of The Gorman-Rupp Company, All Rights Reserved.

Periodic maintenance and inspection is required on all pumps to ensure proper operation. Unit must be clear of debris and sediment. Inspect for leaks and loose bolts. Failure to do so voids warranty.
“HY” Self Priming Pump Series
Refer to form 1808-633-00 for General Operating and Safety Instructions.
DESCRIPTION
This is a single stage centrifugal pump designed for agricultural and general dewatering service. It is close coupled to an internal combustion engine and protected by a steel roll frame equipped with four lift/carry handles. Pump construction is rugged and allows for easy maintenance. Unit will self prime to 20′ with casing filled with liquid.
Units are designed to handle clean water and water containing small solids. Cast iron suction and discharge flanges are male threaded NPT standard “3HY”=3” male NPT, “4HY”=4″ male NPT thread.

Liquid temperature range is 40 F to 180 F maximum (4 C to 80 C). Maximum casing pressure is 95 psi (650 kPa). For use with nonflammable liquids that are chemically compatible with pump component materials.

SPECIFICATIONS

Suction inlet

3HY = 3″ Male NPT

4HY = 4″ Male NPT

Discharge outlet

3HY = 3″ Male NPT

4HY = 4″ Male NPT

Dimensions overall (Length x Width x Height)

3HY = 32″ x 32″ x 25″

4HY = 50″ x 32″ x 25″

Engine and fuel tank size

3HY13HR = Honda GX390, 6.9 quarts

4HY23HR = Honda GX690, 15 gallons

BASIC CONSTRUCTION
Pump is constructed of sand cast aluminum with a cast iron impeller, volute, and suction/discharge flanges. 3HY13HR is directly built on the engine 1″-14 PTO shaft. 4HY23HR utilizes a ball bearing support stub shaft to connect to engine 1-1/8″ keyed PTO shaft. Impeller connects to 1”-14 stub shaft end. Drive shaft is sealed with a mechanical shaft seal, silicon carbide stationary seat, carbon rotating ring, EPDM elastomers, and stainless steel spring and components. All wetted O-rings and flat gaskets are EPDM. Suction utilizes a built in EPDM swing check valve to assist in keeping casing full of liquid for re-priming after initial fill.

ASSEMBLY
Refer to repair parts explosion and repair parts list for reference numbers ( ).
Roll Frame Handle Assembly: 1. Install pivot bearing (F6) in frame (F1) hole. Ends of bearing must be
flush with outside of frame square tube. 2. Hold Handle (F3) perpendicular to frame tube upright. 3. Slide handle end ears over frame tube until handle tube end contacts
frame. 4. Align handle ear hole with bearing in frame. 5. Install pivot pin (F5) and pin end cotter (F7). 6. Install lock pin (F4) in other handle ear hole. Secure with cotter (F7). 7. Handle can be locked in the up or down position with lock pin. 8. Repeat procedure for three remaining handles.
Rubber Feet Assembly: 1. Install bolt (F14) through rubber foot (F13) center hole. Slide bolt
through hole provided in lower tube of roll frame at engine end. 2. Fix in position with hex nut (F15). 3. Repeat in corresponding hole in other lower frame rail. 4. 3HY13HR; repeat in two holes at pump end of frame. 5. 4HY23HR; repeat in two rear holes of fuel tank rails (F31) 6. 4HY23HR; Remove bolts (F14) holding front of pump mounting bracket
(F17) to frame. Install rubber feet on these bolts. Reinstall both with a hex nut.

UNPACKING
Refer to repair parts illustrations and lists to aid in identifying pump components. Unpack and separate all pump components from shipping/packaging materials, making sure all parts are accounted for. Retain all manuals for future reference.

Battery Tray Assembly: 1. Locate battery tray (F9) on two engine mount frame rails. 2. Install two bolts (F10) flat washers and nuts. Secure to frame rail. 3. Install “J” bolts in tray slots. 4. Install hold down angle on “J” bolt threaded ends, fix with wing nuts.

Package should contain: · Pump/engine completely assembled and mounted in roll frame. · 4HY23HR includes fuel tank mounted to roll frame. · Rubber feet with fasteners in bag. · Frame handle parts bag. · Battery tray and hold down parts bag. · Engine owner’s manual. · Pump general safety manual. · Specifications, information, and repair parts manual.
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Install Battery: 1. Maximum battery size is 5-1/4″ wide x 7-3/4″ long U1/U1R Lawn and
Garden battery. Battery 230 CCA (Cold Cranking Amps) or greater. 2. Position battery in tray with (+) terminal towards engine end of frame
and (-) battery towards pump end of frame, recommended, or other orientation if needed with battery used. Maintain sufficient clearance between battery terminals and engine, roll frame, and pump end. 3. Hold battery in position with hold down angle and wing nuts on “J” bolts. Tighten wing nuts sufficiently. Do not over tighten.

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“HY” Self Priming Pump Series

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4. Connect battery cables to proper battery terminal, Red cable is positive connect to threaded stud on engine starter. Black is negative (ground) connect to engine foot and/or roll frame (fasteners not provided).
INSTALLATION
Review all safety information located in safety manual.
Follow the instructions on all tags, labels, and decals attached to the pump.
Since pump installations are seldom identical, this section offers only general recommendations and practices required to inspect, position, and arrange the pump and piping.
Most of the information pertains to a standard static lift application where the pump is positioned above the free level of the liquid pumped.
If installed in a flooded suction application where the liquid is supplied to the pump by gravity or under pressure, some of the information such as mounting, line configuration, and priming must be tailored to the specific application. Be sure to limit the incoming pressure if required, so the maximum casing pressure does not exceed 90 psi (620 kPa).
Pre-Installation Inspection The pump assembly was inspected before shipment from the factory. Before installation, inspect the pump for damage, which may have occurred during shipment or in storage. Check as follows: · Inspect pump casing for cracks, damaged threads, and other obvious
damage. · Check for and tighten loose fasteners. · Carefully read all hang tags, labels, and markings on the unit. Follow the
instructions indicated. · Check engine oil level. Follow manufacturer’s recommendations listed in
the engine manual. · If unit has been stored for more than 12 months, replace engine oil. Drain
any fuel and replace with fresh fuel. · Check condition of suction strainer, clean if clogged with debris.
Positioning Pump Pump/engine is mounted in a roll frame that has (4) four lifting handles built in. Handle has (2) two pins installed. The pivot pin goes through handle end plates and directly through frame tube. Second is the lock pin, it goes through handle end plates only.
To raise and lower handles: · Remove cotter from lock pin end. · Remove lock pin. · Swing handle tube up perpendicular to frame tube. · Install lock pin, fix with cotter. · To lower handle remove lock pin, swing handle down, reinstall lock pin.
Lift and carry pump/engine/battery only with handles. Remove suction and discharge lines and all accessories from pump before lifting.
Mounting Locate the pump in an accessible area as close as practical to the liquid being pumped.
Pump should be leveled if possible by shimming under rubber feet. For proper pump/engine operation unit should be within 15° of level. Continuous operation outside this limit may cause engine/pump damage.

System Piping/Hose Flow through the system is reduced by increased suction lift, increased discharge elevation or discharge nozzle pressure, and increased friction losses. · Keep suction and discharge lines as short and direct as possible to reduce
friction losses. If elbows are necessary in discharge line, use long-radius type, when possible. · Do not operate with coiled-up suction or discharge hose. · Do not use valves in the suction line, unless necessary.
Casing HI/IN-LINE Suction Flange Positioning Pump casing has provisions to install suction flange in the high position for consistent re-priming or in the in-line position for higher flow in flooded suction applications. Pump will prime only if casing is full of liquid. In a lift condition locating the suction flange in the in-line position may allow liquid to leak out of casing down the suction line when pump is not operating. Repriming will require a refill of the casing with liquid. Locating the suction flange in the HI position reduces the likelihood of enough liquid leaking out down the suction line to affect repriming. To move suction flange: · Remove four screws (33) holding suction flange (32) to casing (25) front
machined face. · Remove suction flange and swing check valve assembly (35-38) from
casing. · Loosen four screws (29) holding cleanout cover (28) to casing front face.
Loosen only until screw disengages from threaded hole in casing. Screws are captive in cover and should not be removed completely from it. · Remove cleanout cover and gasket from casing. · Position suction flange and check valve. Install four screws. · Position cleanout cover and gasket. Tighten four screws.
Suction Lines The suction line must be as short and direct as possible. When operating pump under a suction lift condition: · To avoid air pockets that can affect pump priming, the line must always
slope upward to the pump from the liquid source. If the line slopes down at any point along the suction run air pockets will be created. · Hose or pipe size must match pump suction port size. · The maximum vertical lift cannot exceed 20 feet (6.1 meters). · If hose is used for the suction line, it must be the rigid wall reinforced type to prevent collapse. · Fittings such as elbows or valves are not recommended in the suction line. When operating pump in a flooded suction gravity feed condition: · Keep suction line as short and direct as possible. Avoid dips and high spots. · Hose or pipe size cannot be smaller than suction port size. · If hose is used it must be non-collapsible. · Use as few elbows as possible.
Strainers When pumping liquid that may contain solids use a suction strainer to prevent large solids from entering the pump. · 3HY pumps can accept a maximum 3/4″ spherical diameter solid. · 4HY a maximum 1″ spherical diameter solid. It is good practice to use a strainer with slightly smaller openings. Rated solid size is for a spherical diameter, any solid must not be larger than the spherical diameter, smaller diameter but longer cylindrical solids will not pass through pump. Long and stringy material in the liquid will clog the pump.

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Discharge Lines · Use hose or piping that is rated above maximum system line pressure. · To reduce friction head, keep lines as short and direct as possible. Make
minimum use of elbows and fittings since those two items substantially increase friction loss in the discharge line. · Use pressure relief recirculation loop if system allows the pump to run at shutoff for longer than 1 minute or if casing internal pressure exceeds rated 95 psi. There must be a minimum of 20 gallons per minute flow rate after 1 minute at no flow is exceeded. · Do not terminate the discharge line at a level lower than that of the liquid being pumped unless a siphon break is used in the line. Otherwise a siphoning action causing damage the pump and flooding could result.
Valves If a check valve is used in the discharge the pump may have difficulty repriming due to an air locked condition. If a check valve is used provisions to prevent an air locked condition at the pump must be incorporated in the system.
If a throttling valve is desired it must be installed in the discharge line never in the suction line. The valve must be at least the same size as the largest discharge line diameter.

If pump has not fully primed in approximately 5 minutes stop engine and check for suction connection or line leaks, high spots/air pockets in suction line, insufficient liquid level at end of suction line, insufficient liquid level in pump casing or any other condition that will affect priming. Move pump closer to liquid source. Let pump cool down completely. Refill casing and retry priming cycle.
Leakage No leakage should be visible at pump mating surfaces or at pump connections or fittings. Keep all line connections and fittings tight to maintain maximum pump efficiency.
Liquid Temperature and Overheating The maximum liquid temperature for the pump is 180 F (82 C). Do not exceed this liquid temperature.
Overheating can occur if pump is operated against a closed discharge valve or if priming cycle time is extended too long. Both conditions can bring liquid to a boil, build pressure, and cause the pump to rupture or explode. If overheating occurs, stop the pump and allow it to completely cool before servicing it. Refill the pump casing with cool liquid.

Connections to the Pump Even a slight leak in the suction line connection will adversely affect priming capacity, especially when operated with a high suction lift. All threaded connections in the suction line must be sealed with pipe sealant to ensure an airtight seal. Check all hose connection gaskets; replace any that are cracked, worn or no longer elastic.

Do not remove plates, covers, gauges, pipe plugs or fittings from an overheated pump. Vapor pressure within the pump can cause parts
that are disengaged to be ejected with great force. Allow the pump to completely cool before servicing.

Suction Lines in Sumps/Pits If a single suction line is installed in a sump it should be positioned away from the wall of the sump at a distance equal to 1-1/2 times the nominal diameter of the suction line. If there is a liquid flow from an open pipe into the sump, the flow should be kept away from the suction inlet. The inflow will carry air down into the sump and air entering the suction line will reduce pump efficiency. If it is necessary to position the inflow close to the suction inlet, install a baffle between the inflow and the suction inlet at a distance 1-1/2 times the diameter of the suction line.
Suction Line Positioning The depth of the suction line is critical to efficient pump operation. Make certain end of suction line is far enough under the liquid surface. If a vortex is noticed at suction line end, submerge end deeper.
OPERATION
Review all SAFETY information in the pump General Safety Manual.

Strainer Check Check suction strainer regularly and clean it as necessary. The strainer should also be checked if pump flow rate begins to drop.
Stopping Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly damaging shock waves can be transmitted to the pump and piping system. Close all valves slowly.
If the application involves a high static discharge head, gradually close the discharge throttling valve before stopping the pump. The pump discharge check valve may be damaged if liquid in the discharge piping suddenly reverses direction when the engine is stopped.
Cold Weather Preservation In below freezing conditions, completely drain the pump and piping system to prevent damage from freezing. If pump will sit idle for more than a few hours remove casing and cleanout cover. Remove any residual liquid to prevent freezing.

Follow the instructions on all tags, labels, and decals attached to pump.
MAINTENANCE

Priming This is a self-priming pump. Pump will prime to a maximum lift of 20 feet (6.1 meters) if the casing is full of liquid when engine is started. Self priming function of pump relies on a casing filled with liquid. If casing is partially filled or empty pump will not self prime. Casing (25) fill plug (26) is located on top next to suction boss, and/or fill plug (45) is located on top of discharge manifold (42). Use fill plug to fill casing with liquid to ensure fast and complete priming. Run engine at full throttle during the priming cycle. Once the pump primes and

Preventative Maintenance Since pump applications are seldom identical and pump wear is directly affected by such things as the abrasive qualities, pressure and temperature of the liquid being pumped, this section is intended only to provide general recommendations and practices for preventive maintenance. Regardless of the application, following a routine preventive maintenance schedule will help assure trouble free performance and long life from your pump. Keep a log of inspections to better track service part replacement and maintenance intervals.

full flow is accomplished engine throttle may be regulated to produce desired

flow rate.

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For new applications, a first inspection of wearing parts at 250 hours will give insight into the wear rate for your application. Subsequent inspections should be performed at regular intervals. Critical applications should be inspected more frequently.

PUMP DISASSEMBLY
For access to the impeller (14) and shaft seal assembly (18 & 19) following procedures:

DAILY: General condition (temperature, unusual noises or vibrations, cracks, leaks, loose hardware, etc). Pump performance (gauges, speed, flow). MONTHLY: Stub shaft ball bearing check (excessive wear/play, water damage). Mechanical shaft seal (check for leakage). SEMI-ANNUALLY: Impeller to volute running clearance (check for excessive wear affecting performance). PER ENGINE MANUFACTURER’S SERVICE MANUAL: Engine lubrication (check level, change oil and filter per manufacturer’s recommendations)
PUMP/SEAL DISASSEMBLY & REASSEMBLY
Review all SAFETY information in the pump General Safety Manual.

Drain Pump: 1. Remove the casing drain plug (26) located on front bottom of casing (25). 2. Drain all liquid from the pump. Clean plug and install back in casing drain
port.
Remove Casing: 1. Remove suction hose/piping from suction flange (32) located on front of
casing. 2. Loosen eight bolts (39) holding casing to bracket (22). Slide bolt, washer
(40) and nut (41) assemblies from casing and bracket ears. Remove top and bottom bolts first followed by side bolts. 3. Remove casing assembly from bracket.
Remove Volute: 1. Remove two hex nuts (24) on back of bracket towards engine that fasten
the volute to the bracket. 2. Slide volute out disengaging studs (21) from bracket uncovering the
impeller.

Follow the instructions on all tags, labels, and decals attached to pump.
This pump requires little service. When it becomes necessary to inspect or replace the wearing parts, follow these instructions that are keyed to the repair part lists and repair part explosions. This manual will alert personnel to known procedures that require special attention, could damage equipment or be dangerous to personnel. However, this manual cannot possibly anticipate and provide detailed precautions for every situation that might occur during maintenance of the unit. Therefore, it is the responsibility of the owner/maintenance personnel to ensure that only safe, established shop procedures are used and that any procedures not addressed in this manual are performed only after establishing that neither personal safety nor pump integrity are compromised by such practices.

Remove Bracket: 1. Remove discharge hose/piping from flange (32) located on side of
discharge manifold (42). 2. Remove four bolts (F19) and nuts (F20) holding casing feet to frame
bracket. 3. Remove eight screws (23) holding bracket to bearing housing (6) or
adapter (2) depending on model. 4. Slide bracket off seal plate (13), remove from frame (F1) set to the side.
Remove Impeller: 1. Unthread impeller counterclockwise from threaded PTO shaft. Use a
piece of wood or aluminum bar and mallet to strike impeller vane tip with a downward force to break impeller thread free. 2. Remove impeller.

Before attempting to service the pump, switch off the engine ignition and remove the spark plug or take other precautions to ensure that it will remain inoperable. Close all valves in the discharge lines.
Before attempting to service the pump: · Familiarize yourself with this manual. · Shut down the engine and remove the spark plug wires to ensure that the
pump will remain inoperative. · Allow the pump to completely cool if overheated. · Check the temperature before opening any covers, plates, or plugs. · Close the discharge valve. · Vent the pump slowly and cautiously. · Drain the pump. For engine repair, consult the engine manual or contact your local engine service representative.

Seal Removal and Disassembly: 1. Remove impeller shims (17) if so equipped, not all pumps will require
shims. Pumps that do, number of shims will vary from pump to pump. Tie and tag the shims or measure and record their thickness for ease of reassembly. 2. Remove the seal spring from the seal rotating head (18), then slide the shaft sleeve (15) with rotating head attached from the threaded shaft. 3. Mark the position of the seal rotating head face on the shaft sleeve with a marker. Slide the seal head assembly off the sleeve. 4. Remove the seal plate (13) from the bearing housing or adapter. Seal plate is located with a slide fit and should slide straight out of pocket. 5. Remove the stationary seal ring (19) from the seal plate.
PUMP REASSEMBLY
Seal Reassembly and Installation: The seal should not be reused. Leak free operation cannot be guaranteed if old mechanical seal is reused. Never mix old and new seal parts. Always replace the shaft seal as a complete unit. Handle the seal parts with extreme care to avoid damage to the precision lapped sealing faces.

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Clean the shaft sleeve, or replace it if there are cuts or nicks in either end. Clean the seal stationary seat bore in the seal plate. Remove replacement seal from its packaging and inspect the precision finished faces to ensure that they are free of any foreign matter. Remove seal spring retainer if replacement seal is so equipped. In this pump the seal spring is centered on the impeller hub. The spring retainer supplied with the replacement seal is not needed and should not be used. To ease installation of the seal; lubricate the inside of rotating head rubber bellows and the stationary ring o-ring with soapy water.
1. Press a new seal stationary seat into the seal plate bore. Make certain the seal seat is pressed squarely into the bore, that the o-ring isn’t damaged during installation, and that the seal seat ring bottoms evenly in bore.
2. Reinstall the seal plate into the bearing housing or adapter depending on model.
3. Slide the rotating portion of the seal onto the sleeve. Position lapped face in the same orientation as old seal and slide on to mark previously made on sleeve at old seal head removal.
4. Slide the sleeve onto the threaded shaft until the seal faces contact. Make sure the end of the shaft sleeve is contacting the shaft collar (16) located on the threaded shaft.
5. Install the seal spring. Make sure that all components of the seal are seated squarely.

the volute is secured to the bracket disassemble and install another shim. Repeat until impeller hits or scraps volute disassemble and then remove one shim. 5. Impeller to volute clearance at reassembly should be between 0.01″ minimum and 0.03″ maximum.
Install Casing: Make certain that the casing sealing o-ring (47) is in place on the casing. Make certain that the volute nose gasket (50) is in place and not damaged or stretched. 1. Position casing locating boss into the corresponding bore machined into
bracket. Slide casing on until the volute nose contacts the volute nose gasket. 2. Install bolt, washer, nut assemblies into casing/bracket ears. For ease of assembly position hex nut onto bolt with minimal thread engagement to expand grip length to its maxim. Install the bolt assemblies into the side ears first alternating from side to side. Tighten bolts slightly to compress the volute nose gasket, tighten alternating side to side to start casing into bracket squarely. Install bolt assemblies in top and bottom ears tighten all bolts by alternating side to side and top to bottom until casing is fully seated.
REPLACING STUB SHAFT BEARING [4HY23HR]

Install Impeller: Install impeller shims previously removed if so equipped. Inspect impeller and replace it if cracked or badly worn. 1. Position impeller on end of threaded shaft. Impeller threads on clockwise.
Thread impeller onto shaft until it seats squarely against shaft sleeve or shims. Make certain that the seal spring is centered on the impeller machined hub.
Install Bracket: Make certain that the seal plate to bracket sealing o-ring (48) is in place on the seal plate machined bracket locating diameter. 1. Position bracket on seal plate diameter. Slide bracket onto seal plate. 2. Install eight screws securing bracket. 3. Install four bolts, washers, and nuts holding bracket mounting foot to the
frame.

Remove Bearing: 1. Follow PUMP DISASSEMBLY section. Remove all components including
seal plate. 2. Loosen set screw (8) in stub shaft (7). 3. Remove nuts (5) holding engine adapter (2) to engine (1). 4. Slide bearing housing/engine adapter/stub shaft assembly off engine
shaft. Be sure to keep drive key (11) if it falls out of stub shaft or engine PTO shaft. 5. Remove four screws (12) fastening engine adapter to bearing housing (6). 6. In an arbor press position bearing housing on support with threaded portion of stub shaft facing up. 7. Press down on threaded end of stub shaft dislodging stub shaft and bearing (10) from bearing housing. 8. Remove external retaining ring (9) from stub shaft. 9. Press bearing off stub shaft.

Install Volute: Make certain that the two sealing o-rings (49) are in place on the two volute threaded mounting studs (21). 1. Locate threaded studs in holes in bracket. Slide volute over impeller into
bracket until it bottoms. 2. Install two hex nuts to secure volute to bracket.
Impeller to Volute clearance: If all original parts are reassembled when replacing the mechanical shaft seal impeller to volute clearance should remain the same as before disassembly. If the impeller, shaft sleeve, or volute has been replaced with a new part the impeller to volute clearance must be checked/set. 1. Install 0.02″ to 0.04″ more shims in addition to the shims originally
removed. 2. When tightening the hex nuts (24) securing the volute to the bracket rotate
the impeller by periodically bumping over the engine starter. Make sure the impeller spins freely at all times. 3. If impeller contacts or scraps against the volute disassemble and remove a shim. Repeat until impeller rotates freely when the volute is securely fastened to the bracket. 4. If on initial reassembly the impeller rotates freely all the way up to when

Install New Bearing: 1. Position new 4209 2RS lubricated double sealed ball bearing on threaded
end of stub shaft. Press on bearing inner ring until seated against stub shaft shoulder. 2. Install retaining ring. 3. Position bearing in bearing housing bore with threaded end of stub shaft down towards bracket flange. Press on stub shaft until bearing is seated against shoulder at bottom of bore. 4. Locate engine adapter in bearing housing bore. Secure with screws. 5. Reinstall drive key in engine shaft. 6. Align keyway in stub shaft with drive key. Slide assembly onto engine shaft until engine adapter contacts engine mounting face. Use of anti-seize compound between engine shaft and stub shaft bore is recommended. 7. Fasten adapter to engine with nuts. 8. Tighten set screw in stub shaft on drive key. 9. Replace remainder of pump as described in PUMP REASSEMBLY section.

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For Repair Parts contact dealer where pump was purchased.
Please provide following information: -Model Number -Serial Number (if any) Part description and number as shown in parts list

45 43 42 44 22 46

46 32
33 48

1
534 23
8

47 20
7

16

6 9 10

17 19

13

24

21 41 49

14 18

15

23

4

3

39

40 36

34

37

38

26

35

50

27

2 13

33

12 11 2
1

32

28

29 30 31 46 26

25

Figure A – Complete Unit

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Repair Parts List – Complete Unit (Reference Figure A)

Ref

No. Description

1

Engine – Honda GX390 + E-Start

Engine – Honda GX690 + E-Start

2

Adapter Kit

(includes Ref. Nos. 2, 3, 4 and 5)

3

Hex Head Screw

Threaded Stud

4

SAE Washer

Lock Washer

5

Hex Nut

6

Bearing Housing Kit

(includes Ref. Nos. 6, 7, 8, 9, 10, 11 and 12)

7

Stub Shaft

8

Set Screw

9

Retaining Ring

10 Sealed Bearing

11 Drive Key

12 Hex Screw

13 Seal Plate

14 Impeller Kit

(includes Ref. Nos. 14, 15, 16 and 17)

15 Shaft Sleeve

16 Shaft Collar

17 Impeller Shims

18 & 19 Shaft Seal Assembly

20 Volute Kit

(includes Ref. Nos. 20 and 21)

21 Threaded Stud

22 Bracket Kit

(includes Ref. Nos. 22, 23 and 24)

23 Hex Screw

24 Hex Flange Nut

25 Casing Kit

(includes Ref. Nos. 25, 26 and 27)

26 NPT Plug

27 Hex Flange Screw

28 Cleanout Cover Kit

(includes Ref. Nos. 28, 29, 30 and 31)

29 Hex Screw

30 SAE Washer

31 O-ring EPDM

32 Suction Flange Kit

(includes Ref. Nos. 32 and 33)

33 Hex Screw

34 Check Valve Kit EPDM

(includes Ref. Nos. 34, 35, 36, 37 and 38)

35 Bolt

36 Weight

37 Weight

38 Nut

Part Number of Model

3HY13HR

4HY23HR

Qty

1639-031-00

N/A

1

N/A

1639-010-90

1

6100-030-90

6100-091-91

1

Incl. w/2 N/A Incl. w/2 N/A N/A N/A

N/A

4

Incl. w/2

4

N/A

4

Incl. w/2

4

Incl. w/2

4

6100-090-91

1

N/A

Incl. w/6

1

N/A

Incl. w/6

1

IN/A

Incl. w/6

1

N/A

Incl. w/6

1

N/A

Incl. w/6

1

N/A

Incl. w/6

4

25FP-020-90

25FP-020-90

1

6100-012-90

6100-011-90

1

Incl. w/A13

Incl. w/A13

1

Incl. w/A13

Incl. w/A13

1

Incl. w/A13

Incl. w/A13

4

1646-324-00

1646-324-00

1

6100-152-90

6100-151-90

1

Incl. w/20

Incl. w/20

2

6100-040-90

6100-040-90

1

Incl. w/22

Incl. w/22

8

Incl. w/22

Incl. w/22

2

6100-001-90

6100-001-90

1

Incl. w/25

Incl. w/25

2

Incl. w/25

Incl. w/25

4

6100-050-90

6100-050-90

1

Incl. w/28

Incl. w/28

4

Incl. w/28

Incl. w/28

4

Incl. w/28

Incl. w/28

4

3S13-050-90

3993-050-90

1

Incl. w/32

Incl. w/32

4

399C-076-90

399C-076-90

1

Incl. w/34 & KIT Incl. w/34 & KIT

1

Incl. w/34 & KIT Incl. w/34 & KIT

1

Incl. w/34 & KIT Incl. w/34 & KIT

1

Incl. w/34 & KIT Incl. w/34 & KIT

1

3HY13HR 4HY23HR

6100-250-00

7

5/2024

Specifications Information and Repair Parts Manual

Repair Parts List – Complete Unit (Reference Figure A) – CONTINUED

Ref No. Description 39 Casing Fastener Kit
(includes Ref. Nos. 39, 40 and 41) 40 SAE Washer 41 Hex Nut 42 Discharge Manifold Kit
(includes Ref. Nos. 42, 43, 44 and 45) 43 Cap Screw 44 SAE Washer 45 NPT Plug KIT Gasket Kit
(includes Ref. Nos. 46, 47, 48, 49 and 50) 46 Flange Gasket 47 Casing O-Ring EPDM 48 Bracket O-Ring EPDM 49 Volute O-Ring EPDM 50 Volute Nose Gasket EPDM

Part Number of Model

3HY13HR

4HY23HR

Qty

6100-110-90

6100-110-90

1

Incl. w/39

Incl. w/39

8

Incl. w/39

Incl. w/39

8

6100-080-90

6100-080-90

1

Incl. w/42

Incl. w/42

4

Incl. w/42

Incl. w/42

4

Incl. w/42

Incl. w/42

1

6100-300-90

6100-300-90

1

Incl. w/KIT

Incl. w/KIT

3

Incl. w/KIT

Incl. w/KIT

1

Incl. w/KIT

Incl. w/KIT

1

Incl. w/KIT

Incl. w/KIT

2

Incl. w/KIT

Incl. w/KIT

1

3HY13HR 4HY23HR

6100-250-00

8

5/2024

Specifications Information and Repair Parts Manual
“HY” Self Priming Pump Series

3HY13HR 4HY23HR

For Repair Parts contact dealer where pump was purchased.
Please provide following information: -Model Number -Serial Number (if any) Part description and number as shown in parts list

F4 F5 F3

F6 F7

F20 F20

F1 F9 F35 F10
F11 F34

F33 F31 F31 F44

F35 F32

F46 F45

F47 F40

F15 F13 F14 F17 F18 F19
F20

F23

F15 F33 F13 F37

F26 F13

F38

F25

F14

F20

F24

F20

F20

F43 F42 F39

F18 F17

PUMP FOOT MOUNT BRACKET 3HY13

F19 F21 F18

Figure B – Frame

6100-250-00

9

5/2024

Specifications Information and Repair Parts Manual

Repair Parts List – Frame (Reference Figure B)

Ref

No.

Description

F1

Roll Frame

F2

Handle Part Kit

(includes Ref. Nos. F2, F3, F4, F5, F6 and F7)

F3

Handle

F4

Lock Pin

F5

Pivot Pin

F6

Pivot Bearing

F7

Cotter Pin

F8

Battery Tray Kit

(includes Ref. Nos. F9, F10 and F11)

F9

Battery Tray and Hold Down Parts

F10

Bolt

F11

Hex Nut

F12

Rubber Foot Kit

(includes Ref. Nos. F13, F14 and F15)

F13

Rubber Foot

Incl. w/F12

F14

Hex Botl

Hex Bolt

F15

Hex Flange Nut

Hex Flange Nut

F16

Pump Foot Mounting Bracket Parts Kit

(includes Ref. Nos. F17, F18, F19, F20 and F21)

F17

Pump Foot Mount Bracket

F18

Hex Bolt

F19

Hex Bolt

F20

Hex Flange Nut

F21

Hex Bolt

F22

Engine Mounting Hardware Parts Kit

(includes Ref. Nos. F23, F24, F25, F26, F27, F28 and F29)

F23

Raising Blocks

F24

Hex Bolt

F25

Flat Washet

F26

Hex Flange Nut

F27

Hex Flange Nut (not shown)

F28

Flange Nut (not shown)

F29

Drainzit Extended Oil Drain

F30

Fuel Tank Frame Parts Kit

(includes Ref. Nos. F31, F32, F33, F34 and F35)

F31

Fuel Tank Rail

F32

Tank Frame Mount Plated

F33

Hex Bolt

F34

Hex Flange Bolt

F35

Nex Flange Nut

F36

Fule Tank Mount Hardware Parts Kit

(includes Ref. Nos. F37 and F38)

F37

Hex Bolt

F38

Hex Flange Nut

F39

Fuel Tank

F40

Fuel Cap Non-Venting

3HY13HR 4HY23HR

Part Number of Model

3HY13HR

4HY23HR

Qty

C404-100-00

C404-100-00

1

C404-120-90

C404-120-90

1

Incl. w/F2

Incl. w/F2

4

Incl. w/F2

Incl. w/F2

4

Incl. w/F2

Incl. w/F2

4

Incl. w/F2

Incl. w/F2

4

Incl. w/F2

Incl. w/F2

4

C404-107-90

C404-107-90

1

Incl. w/F8

Incl. w/F8

1

Incl. w/F8

Incl. w/F8

2

Incl. w/F8

Incl. w/F8

2

C400-100-91

C400-100-90

1

Incl. w/F12

N/A

4

N/A

Incl. w/F12

6

Incl. w/F12

N/A

4

N/A

Incl. w/F12

6

Incl. w/F12

N/A

4

N/A

Incl. w/F12

6

6100-102-90

C404-122-90

1

Incl. w/F16

Incl. w/F16

1

Incl. w/F16

Incl. w/F16

2

Incl. w/F16

Incl. w/F16

4

Incl. w/F16

Incl. w/F16

8

Incl. w/F16

Incl. w/F16

2

6100-400-91

6100-400-90

1

Incl. w/F22 Incl. w/F22 Incl. w/F22 Incl. w/F22 N/A N/A N/A N/A

Incl. w/F22

2

Incl. w/F22

4

Incl. w/F22

4

Incl. w/F22

4

Incl. w/F22

2

Incl. w/F22

2

Incl. w/F22

1

C404-110-90

1

N/A

Incl. w/F30

2

N/A

Incl. w/F30

2

N/A

Incl. w/F30

6

N/A

Incl. w/F30

2

N/A

Incl. w/F30

8

N/A

5585-174-90

1

N/A

Incl. w/F36

4

N/A

Incl. w/F36

4

N/A

5585-174-00

1

N/A

5585-172-00

1

6100-250-00

10

5/2024

Specifications Information and Repair Parts Manual

Repair Parts List – Frame (Reference Figure B) – CONTINUED

Ref

No.

Description

F41

Fuel Tank Fittings and Hose Parts Kit

(includes Ref. Nos. F42, F43, F44, F45, F46, F47, F48, F49 and F50)

F42

NPT Plug

F43

1/4 Hose Elbow

F44

3/8 Hose Elbow

F45

Checl Valve

F46

Weather Cap

F47

Fuel Level Guage

F48

1/4″ Low-Perm Fuel Hose (not shown)

F49

3/8″ Low-Perm Fuel Hose (not shown)

F50

Hose Clamps (not shown)

F51

Positive Battery Cable (not shown)

F52

Negative Battery Cable (not shown)

F53

Suction Strainer (not shown)

3HY13HR 4HY23HR

Part Number of Model

3HY13HR

4HY23HR

Qty

N/A

5585-174-91

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

1

N/A

Incl. w/F41

4

C401-105-90

C401-105-90

1

C401-104-90

C401-104-90

1

1680-000-00

1680-000-00

1

6100-250-00

11

5/2024

Specifications Information and Repair Parts Manual

3HY13HR 4HY23HR

6100-250-00

12

5/2024

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