C175-16 Marine Engine Caterpillar

Removal Procedure

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NOTICE
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates.

1. Drain the coolant from the cooling system into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".
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   Illustration 1	g02020859

2. Remove bolts (1). Remove bolts (4). Remove elbow (3) from tube assembly (2). Remove the O-ring seal from elbow (3).

3. Remove bolts (5). Disconnect elbow (6). Remove the O-ring seal.
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   Illustration 2	g01201281

4. Attach a suitable lifting device onto water pump (9). The weight of water pump (9) is approximately 35 kg (76 lb). Disconnect hose assembly (8). Remove nuts (7) and remove water pump (7).

Installation Procedure

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Illustration 3	g01201281

1. Attach a suitable lifting device onto water pump (9). The weight of water pump (9) is approximately 35 kg (76 lb). Position water pump (9) onto the engine and install nuts (7). Connect hose assembly (8).
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   Illustration 4	g02020859

2. Position the O-ring seal and elbow (6). Install bolts (5).

3. Position the O-ring seal onto elbow (3). Install elbow (3) into tube assembly (2). Install bolts (4). Install bolts (1).

4. Fill the cooling system with coolant. Refer to Operation and Maintenance Manual, "Cooling System Coolant - Change".

Disassembly Procedure

Start By:

1. Remove the water pump.

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Illustration 5	g01036014

1. Remove plug (1) and plug (2) from bearing housing (3). Remove plug (6) from housing (5). Remove the O-ring seals from the plugs.

2. Remove water pump filter (4) from bearing housing (3).
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   Illustration 6	g01035264

3. Remove bolts (7) and washers. Remove bearing housing (3) from housing (5). Remove O-ring seal (8) from bearing housing (3).
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   Illustration 7	g01035285

4. Install Tooling (B) under impeller (9). Use a suitable press and Tooling (A) to remove the impeller.

   Note: Do not allow bearing housing (3) to fall to the floor when the impeller is removed from the pump shaft.

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   Illustration 8	g01035309

5. Remove socket head bolts (10). Remove retainer (11) and pump shaft (12) from bearing housing (3).

   Note: Spring (14) and ceramic seal (13) will be removed from the shaft assembly when the pump shaft is removed from the bearing housing.

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   Illustration 9	g01035407

6. Install pump shaft (12) in Tooling (C). Loosen set screws (15). Use Tooling (D) to remove bearing locknut (16) from the pump shaft.

   Note: The splined end of the pump shaft is marked in order to indicate either RH threads or LH threads on the pump shaft.

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   Illustration 10	g01035429

7. Use Tooling (E) to remove bearing assembly (17) from pump shaft (12).
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   Illustration 11	g01035437

8. Remove ceramic seal (18) and lip seal (19) from bearing housing (3).

Assembly Procedure

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Illustration 12	g01040290

1. Use Tooling (E) and a suitable press to install bearing assembly (17) on pump shaft (12).

2. Install bearing cone (23) on the pump shaft.

3. Install spacer (22) and bearing cups (21) on the pump shaft.

4. Install bearing cone (20) on the pump shaft.
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   Illustration 13	g01035607

5. The splined end of the pump shaft is marked in order to indicate either RH threads or LH threads on pump shaft (12). Install bearing locknut (16). Use Tooling (D) on the bearing locknut. Tighten the bearing locknut to a torque of 300 ± 30 N·m (221 ± 22 lb ft).

   Note: The torque wrench must be 90 degrees to Tooling (D).

6. Install set screws (15) and tighten to a torque of 8 ± 1 N·m (70.8 ± 8.9 lb in).
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   Illustration 14	g01035690

   Note: Do not damage the wear surfaces of the carbon ring or the ceramic ring. Do not touch the wear surfaces of the carbon ring or the ceramic ring. Install the ceramic ring with the smoothest face of the ring toward the carbon seal.

7. Apply Tooling (F) to the outside diameter of ceramic seal (18). Use Tooling (G) and hand pressure to install ceramic seal (18) in bearing housing (3).
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   Illustration 15	g01035699

8. Use Tooling (A) and a suitable press to install lip seal (19) in bearing housing (3). Ensure that the lip is toward the outside.

   Note: Install the lip seal dry. Install the lip seal within 2 minutes of removal from the shipping sleeve.

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   Illustration 16	g01035809

9. Lubricate pump shaft (12) with clean engine oil. Install the pump shaft in bearing housing (3). Install retainer (11). Install socket head bolts (10) and tighten to a torque of 12 ± 3 N·m (106 ± 27 lb in).
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   Illustration 17	g01035829

   Note: Do not damage the wear surfaces of the carbon ring or the ceramic ring. Do not touch the wear surfaces of the carbon ring or the ceramic ring. Install the ceramic ring with the smoothest face of the ring toward the carbon seal.

10. Remove spring (14) from ceramic seal (13).

11. Apply Tooling (F) to the inside diameter of ceramic seal (13). Use hand pressure and the tool that is supplied with the water pump seal group to install the ceramic seal. The face of ceramic seal (13) should make light contact with ceramic seal (18).

12. Install spring (14).

13. Lubricate pump shaft (12) on bearing housing (3) with clean engine oil. Position impeller (9) on the pump shaft.
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    Illustration 18	g01035846

14. Place bearing housing (3) on impeller (9). Use a suitable press and press pump shaft (12) into the impeller. Install the impeller so the dimension between the impeller and the pump shaft is 0.000 ± 0.076 mm (0.0000 ± 0.0030 inch).
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    Illustration 19	g01035264

15. Install O-ring seal (8) on bearing housing (3). Lubricate the O-ring seal with clean engine oil.

16. Position bearing housing (3) in housing (5). Install washers and bolts (7) finger tight.
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    Illustration 20	g01036084

17. Tighten the bolts in a numerical sequence to a torque of 50 ± 9 N·m (35 ± 7 lb ft).

18. Use Tooling (H) and measure the gap between the impeller and the pump housing. The minimum gap between the impeller and the pump housing is 0.20 mm (0.008 inch).
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    Illustration 21	g01036014

19. Install the O-ring seal on plug (6). Install the plug-in housing (5). Tighten the plug to a torque of 177 ± 7 N·m (131 ± 6 lb ft).

20. Install the O-ring seal on plug (2). Install the plug-in bearing housing (3). Tighten the plug to a torque of 8 ± 1 N·m (6 ± 1 lb ft).

21. Install the O-ring seal on plug (1). Install the plug-in bearing housing (3). Tighten the plug to a torque of 17 ± 1 N·m (151 ± 9 lb in).

22. Install water pump filter (4) in bearing housing (3).

End By:

1. Install the water pump.