3208 TRUCK ENGINE Caterpillar


Water Pump

Usage:

Remove Water Pump

1. Drain the coolant from the cooling system.

2. Remove the vee belts from the front of the engine.

3. Remove bolts (2) and pointer (3). Remove water pump (1) from the timing gear cover.

Install Water Pump

1. Put the gasket and water pump in position in the timing gear cover.

2. Install the pointer and bolts to hold the water pump.

3. Put the vee belts in position in the front of the engine.

4. Use a belt tension gauge such as Borroughs Tool Company Part No. BT-33-72C or an equivalent and make an adjustment of the vee belt tension. Tighten new belts until the gauge indication is 120 ± 5. Operate the engine at high idle for a minimum of 30 minutes after Step 5. Make another adjustment of the belt tension. The correct gauge indication for used belts is 90 ±10.

5. Fill the cooling system with coolant to the correct level. See MAINTENANCE GUIDE.

Disassemble Water Pump

start by:

a) remove water pump

1. Hold the pump shaft in a vise as shown and remove the bolt and pulley (1).

2. Use tooling (A) and a press to remove the shaft, seal and impeller from housing (2) as shown.

------ WARNING! ------

The press must have a guard. The guard has been removed for photo illustration.

--------WARNING!------

3. Remove bearing (3) from housing (2).

4. Remove spacer (4) from housing (2).

5. Use tool (B) to remove ring (5) from housing (2). Remove bearing (6) from housing (2).

6. Use a press and tool (C) to remove the shaft and seal assembly from impeller (7) as shown.

7. Install the seal assembly and shaft in housing (2) as shown. Use a press and tool (C) to remove the shaft from the seal assembly.

Assemble Water Pump

1. Install bearing (1) in housing (3). Use tool (A) to install ring (2) that holds bearing (1) in position.

2. Install spacer (4) in housing (3).

3. Make sure the outside diameter of bearing (5) and the bore in housing (3) are clean and dry. Install bearing (5) in housing (3).

4. Fill the chamfer area between the housing and outside diameter of bearing (5) with 7M7456 Bearing Mount. Remove the excess bearing mount from the housing.

5. Turn the pump housing over and make sure that the bores in the bearings and spacer are in alignment. Install the shaft through the bearings from the impeller side of the housing.

NOTE: The shaft to bearing clearance can be .0007 in. (0.018 mm) loose to .0003 in. (0.008 mm) tight. If it is necessary to use a press to install the shaft, make sure the inner races of the bearings have support.

6. Install pulley (6) on the shaft and tighten the bolt to a torque of 55 ± 5 lb. ft. (75 ± 7 N·m).

7. Put a new seal assembly (7) on the shaft as shown.

8. Use tool (B) and a press to install the seal assembly in housing (3). Do not use a hammer to install the seal.

9. Put tool (D) between impeller (8) and the pump housing.

10. Use a press and tool (C) to install impeller (8) on the shaft until tool (D) can just be removed from between the housing and impeller.

11. If the impeller is installed too far and tool (D) can not be removed, turn the pump over and remove the pulley. Use tooling (E) and a press to push the shaft out of the housings enough to remove tool (D). Install the pulley and tighten the bolt to a torque of 55 ± 5 lb. ft. (75 ± 7 N·m).

end by:

a) install water pump

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