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	g02021493

2. Disconnect harness assemblies (4). Remove clamp assembly (1). Remove bolt (2) and remove the clamp. Remove bolts (6). Remove tube assembly (3). If necessary, remove hose assembly (5).
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   Illustration 2	g02021673

3. Remove bolts (9) and elbow (10).

4. Attach a suitable lifting device onto auxiliary water pump (7). The weight of auxiliary water pump (7) is approximately 27 kg (60 lb). Remove bolts (8). Remove auxiliary water pump (7).

Installation Procedure

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Illustration 3	g02021673

1. Attach a suitable lifting device onto auxiliary water pump (7). The weight of auxiliary water pump (7) is approximately 27 kg (60 lb). Position auxiliary water pump (7). Install bolts (8).

2. Position elbow (10) and install bolts (9).
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   Illustration 4	g02021493

3. If necessary, install hose assembly (5). Install tube assembly (3). Install bolts (6). Position the clamp and install bolt (2). Install clamp assembly (1). Connect harness assembly (4).

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

Disassembly Procedure

Start By:

1. Remove the auxiliary water pump.

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Illustration 5	g01204934

1. Remove nuts (1). Remove cover (2) from water pump (3).
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   Illustration 6	g01204935

2. Remove O-ring seal (4) from cover (2).
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   Illustration 7	g01207677

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   Personal injury can result from being struck by parts propelled by a released spring force. Make sure to wear all necessary protective equipment. Follow the recommended procedure and use all recommended tooling to release the spring force.

3. Use Tooling (A) in order to remove impeller (5).
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   Illustration 8	g01207678

4. Remove spring (6).
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   Illustration 9	g01207696

5. Turn over water pump (3). Remove bolts (8). Remove shaft (7) and thrust washer (9). When you remove shaft, (7) the seal ring will be free from shaft (7).
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   Illustration 10	g01207698

6. Remove seal (10) and ring assembly (11).
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   Illustration 11	g01207700

7. Turn over water pump (3). Remove the rubber seal and the ceramic ring of seal group (12).

Assembly Procedure

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Illustration 12	g01207698

1. Do not lubricate the sealing lip of seal (10). Install ring assembly (11). Use Tooling (B) to install seal (10).
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   Illustration 13	g01207696

2. Install shaft (7) with thrust washer (9) into water pump (3). Install bolts (8).
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   Illustration 14	g01207752

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   Illustration 15	g01207755

3. Turn over water pump (3). Use water or Tooling (C) to aid assembly. Use Tooling (D) and hand pressure to seat the ceramic ring and the rubber seal of seal group (12) into water pump (3). Remove the spring from the seal ring. Use Tooling (D) and hand pressure to press the seal ring of seal group (12) on the shaft until the seal faces make contact.
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   Illustration 16	g01207678

4. Install spring (6).
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   Illustration 17	g01207798

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   Improper assembly of parts that are spring loaded can cause bodily injury. To prevent possible injury, follow the established assembly procedure and wear protective equipment.

5. Lubricate shaft (7) with clean engine oil. Use Tooling (B) and a suitable press in order to install impeller (5) onto shaft (7). Install impeller (5) until impeller (5) is flush with shaft (7).
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   Illustration 18	g01204935

   Note: Check the O-ring seal for wear or for damage. If necessary, replace the O-ring seal.

6. Install O-ring seal (4) onto cover (2).
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   Illustration 19	g01204934

7. Install cover (2) onto water pump (3). Install nuts (1).

End By:

1. Install the auxiliary water pump.