[Type text] 3163-95, 3930-95, 3932-95, 3930-D5 & 3937-D5 x

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.

©2019 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.

2-Inch Trash Pumps

Refer to pump manual 1808-633-00 for General Operating and Safety Instructions.

DESCRIPTION

These centrifugal pumps are engine-driven, self-priming (to 20 ft. lift) portable units, shipped completely assembled and mounted. Pumps include a clog resistant, open impeller capable of handling solids as large as 1" diameter for 2" NPT models (up to 25% by volume). A built-in check valve assists in priming and a Viton/Silicon Carbide mechanical seal prevents leakage. Handles liquids from 40º to 180º F (4º to 82º C). For use with nonflammable liquids compatible with pump component materials.

SPECIFICATIONS

Su ction Inlet…………………………………………………………..2" NPT

Discharge Outlet……………………………………………………..2" NPT

Basic Con struction…………………………………………………Cast Iron

MAINTENANCE

To prevent accidental starting always remove the spark plug, or disconnect and ground the spark plug wire before attempting to service or remove any component.

10.

11.

12. carefully).

After the seal seat is in place, be sure that it is clean and has not been marred.

Using a clean cloth, wipe the shaft and make certain that it is perfectly clean.

Secure the adapter on the engine mounting face.

Tighten hex flange screws EVENLY to avoid cocking rabbet on engine mounting face.

13. Apply a light coating of soapy water to the inside rubber portion of seal head and slide onto the shaft sleeve. Slip the shaft sleeve with seal head onto the engine shaft with the black carbon face toward the white ceramic seal seat.

CLEANING

This unit has been designed with a removable volute enabling the pump to be cleaned or unclogged with ease. Remove casing and volute as described in steps 1 and 2 under MECHANICAL SEAL

REPLACEMENT. Remove any debris found inside the unit, reassemble as described in steps 16 and 17 under MECHANICAL

SEAL REPLACEMENT.

NOTE: Depending on application, it may be necessary to remove

2.

3. suction and discharge hoses.

MECHANICAL SEAL REPLACEMENT

Refer to Figures 1 and 2

IMPORTANT: Always replace the seal seat (Ref. No. 5), seal head

(Ref. No. 6), and shaft sleeve (Ref. No. 7) to ensure proper mating of mechanical seal components.

1. Unthread cap screws (Ref. No. 14) and remove casing (Ref.

No. 12) and O-ring (Ref. No. 4) from the adapter (Ref. No.

3).

Unthread round head screws (Ref. No. 15) and remove volute (Ref. No. 10) from adapter.

Unscrew impeller (Ref. No. 9) from the engine shaft.

Remove the impeller shim(s) (Ref. No. 8), shaft sleeve and seal head from engine shaft.

NOTE: To keep the shaft from turning, remove the shroud from the engine and hold the flywheel in place.

4. Unthread hex flange screw (Ref. No. 2) and remove the

5.

6.

7.

8.

9. adapter from the engine mounting face.

Push seal seat from the adapter recess with a screwdriver.

Clean the adapter recess before inserting a new seal seat.

Carefully wipe the ceramic surface of the new seal seat with a clean cloth.

Wet the outside of the rubber portion of the seal seat with a light coating of soapy water.

Press the new seal seat squarely into the cavity in the adapter. Use finger pressure only to avoid scratching the seal seat (This is a lapped surface and must be handled very

Do not touch or wipe the face of the Polished surface part of the seal head.

14. Replace any impeller shim(s) removed in disassembly.

15. Screw impeller back in place, tightening until it is against the

16. shaft sleeve.

Remount volute and position O-ring in place.

IMPORTANT: Always inspect O-ring. Replace when cracked or worn.

Wet O-ring with soapy water for ease of assembly.

17. Remount casing.

SHIM ADJUSTMENT

1. When installing a replacement engine, adapter, impeller, shaft sleeve, volute or casing it may be necessary to vary the number of impeller shims (Ref. No. 8) that will be required. This is easily done by adding one shim more than was removed and reassembling the pump as described in

MECHANICAL SEAL REPLACEMENT section.

NOTE: When adding or removing shims, it is best to proceed with a

0.010" increment each time. Remove spark plug wire from engine and ground. While tightening the unit together, turn the shaft (by pulling on the recoil starter etc.); feel for the shaft seizing. If shaft begins to seize before the fasteners are completely tight, disassemble the pump and remove one shim and repeat assembly.

2. Once having added one shim more than original, ensure that

3.

4. the volute (Ref. No. 10) and adapter (Ref. No. 3) are firmly fitted (check fasteners, Ref. Nos. 2 & 15). When engine turns freely, add shims until it does strike, then remove a

0.010" shim. This should allow the proper clearance.

Proper running clearance for the impeller should be as close as possible to volute without striking; maximum clearance is

1/32" (0.032").

Follow the above procedure until proper clearance is obtained. This will ensure maximum performance.

3930-252-00 1 3/2019

[Type text] x

2-Inch Trash Pumps

3163-95, 3930-95, 3932-95, 3930-D5 & 3937-D5

Figure 1- Mechanical Seal Replacement

Please provide following information:

-Model Number

-Serial Number (if any)

Part description and number as shown in parts list

For Repair Parts contact dealer where pump was purchased.

3930-252-00

Figure 2 – Repair Parts Illustration

2 3/2019

[Type text] x

Repair Parts List

7

8

9

10

Ref.

No. Description

1 Engine B&S 550 (3163-95)

Engine B&S 1350 (3930-95)

Engine Honda GX160 (3932-95)

Engine Hatz 1B20 Diesel (3930-D5)

Engine Hatz 1B30 Diesel (3937-D5)

2

3

4

Hex Head Cap Screw

Adapter Kit

(includes Ref. Nos. 2, 3 & 7)

O-Ring - Viton

5 & 6 Shaft Seal Assembly - Silicon Carbide/Viton

Shaft Sleeve

Impeller Shim Package

Impeller Kit

(includes Ref. Nos. 8 & 9)

Volute Kit

(includes Ref. Nos. 10, 15 & 20)

11

12

13

14

15

16

17

18

Flapper Valve - Viton

Casing

(includes Ref. Nos. 12, 13, 14, 16 & 19)

1/2" NPT Plug

Hex Head Cap Screw

Socket Head Screw SS

Nut

Hex Head Cap Screw

Hex Nut

19

20

21

22

Flat Washer

Lock Washer SS

Roll Cage Frame Assembly

Frame Hardware Kit

(includes Ref. Nos. 17, 18 & 19)

KIT Flapper Valve/O-Ring Kit - Viton



Raising Block



NPT Pipe Nipple Kit

 NPT Suction Strainer

 2” NPT Street Elbow

 Wheel Kit (optional)

(*) Standard Hardware Item, Available Locally

(



) Not Shown

3930-252-00

3163-95

1630-008-00

Incl. w/ Ref 3

3163-030-95

Incl. w/ Ref. KIT

1641-166-91

1483-149-00

1658-000-90

3163-010-95

3163-150-95

Incl. w/ Ref. KIT

3163-002-95

Incl. w/ Ref.12

Incl. w/ Ref.12

Incl. w/ Ref.10

Incl. w/ Ref.12

Incl. w/ Ref.22

Incl. w/ Ref.22

Incl. w/ Ref.12

Incl. w/ Ref.10

3120-105-K0

C403-420-90

3163-301-90

-

C366-90

C362-90

1695-070-00

C402-90

Incl. w/ Ref 3

3540-030-95

Incl. w/ Ref. KIT

1641-166-91

1483-149-00

1658-000-90

3540-010-95

3930-150-95

Incl. w/ Ref. KIT

3930-002-95

Incl. w/ Ref.12

Incl. w/ Ref.12

Incl. w/ Ref.10

Incl. w/ Ref.12

Incl. w/ Ref.22

Incl. w/ Ref.22

Incl. w/ Ref.12

Incl. w/ Ref.10

3120-105-K0

C400-100-91

3540-301-90

-

C366-90

C362-90

1695-070-00

C402-90

Part Number for Models:

3930-95 3930-D5

3932-95 3937-D5

1639-034-00

1639-036-00

Discontinued

1630-035-90

Incl. w/ Ref 3

3540-032-95

Incl. w/ Ref. KIT

1641-166-91

1483-149-00

1658-000-90

3540-010-95

3930-150-95

Incl. w/ Ref. KIT

3930-002-95

Incl. w/ Ref.12

Incl. w/ Ref.12

Incl. w/ Ref.10

Incl. w/ Ref.12

Incl. w/ Ref.22

Incl. w/ Ref.22

Incl. w/ Ref.12

Incl. w/ Ref.10

1696-100-K0

C401-100-91

3540-301-90

-

C366-90

C362-90

1695-070-00

C402-90

3

3163-95, 3930-95, 3932-95, 3930-D5 & 3937-D5

4

2

1

1

1

2

1

1

1

1

1

1

2

4

2

4

4

4

1

1

1

1

Qty.

1

4

1

1

1

1

1

1

1

3/2019

[Type text] x

3163-95, 3930-95, 3932-95, 3930-D5 & 3937-D5

3930-252-00 4 3/2019