D343 INDUSTRIAL & MARINE ENGINES Caterpillar


Jacket Water Pump

Usage:

Remove Jacket Water Pump

1. Drain the engine cooling system.

2. Disconnect the water temperature regulator bypass line (2), (Industrial engine only).

3. Remove the water pump inlet line (4).

4. Remove four retaining bolts (3) to disconnect water outlet adapter (1) from water pump (5).

5. Remove eight retaining bolts and nuts (6). Remove water pump-weight 60 lbs. (27 kg).

Install Jacket Water Pump

1. Install the water pump and retaining bolts.

2. Install the water outlet adapter retaining bolts.

3. Install the water pump inlet line.

4. Connect the water temperature regulator bypass line, (Industrial engine only).

5. Fill the engine cooling system.

Disassemble Jacket Water Pump

preparatory step:

a) remove jacket water pump

1. Back the gear retaining nut off flush with the end of the shaft. Install tool (A) and separate gear (1) from the shaft.

2. Remove the retaining nut and gear. Remove the key from the shaft.

3. Remove the water pump housing cover retaining nuts. Install two 3/8"-16NC forcing screws and remove the housing cover.

4. Back the impeller retaining nut off flush with the end of the shaft. Install tool setup (B) and separate the impeller from the shaft.

5. Remove the retaining nut and impeller (2).

6. Remove rubber seal (4) and steel ring (5) from the shaft.

7. Separate the bearing cage and shaft assembly (3) from the water pump housing (6).

8. Remove the carbon seal assembly (7) from the water pump housing.

9. Remove the bearing retaining ring (8) from the bearing cage. Remove the bearing and shaft assembly from the bearing cage.

10. Press the bearings and spacer off the water pump shaft.

11. Remove the oil seal from the bearing cage.

Assemble Jacket Water Pump

1. Install the bearings and spacer on the water pump shaft.

2. Install bearing and shaft assembly in the bearing cage. Install the bearing retaining ring.

3. Rap a thin sheet of plastic or metal (1) around the water pump shaft. Lubricate the lip of the seal with clean SAE 30 engine oil. Slide the seal (2) over the shaft with lip of seal facing toward the bearing. Press the seal into the bearing cage using tool setup (A).

4. Using tool setup (A) install the water pump seal assembly (3).

5. Connect the water pump housing and the bearing cage assembly.

6. Install seal (5) and ring (4) on the water pump shaft so the polished surface of ring will contact seal assembly (3).

7. Install the impeller, washer and retaining nut. Tighten the retaining nut to 55 lb. ft. (7,6 mkg).

8. Install the water pump cover (6) with no O-ring and not gaskets. Measure the clearance between cover and impeller with feeler gauge (7).

9. Add gaskets as necessary to obtain .005" to .020" clearance. After this clearance has been obtained, remove the cover and install the O-ring and install the cover and recheck the clearance.

10. Heat the water pump drive gear in oil to 300°F. Install the key in shaft and install drive gear. Install washer and drive gear retaining nut. Tighten the retaining nut to 60 lb. ft. (8,3 mkg) and install cotter pin.

concluding step:

a) install jacket water pump

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