C175-16 and C175-20 Locomotive Engines Caterpillar

Assembly Procedure

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Illustration 1	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 2	g01035607

5. The splined end of the pump shaft is marked 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 3	g01035699

7. 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 4	g01035809

8. 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 5	g06095440

9. Use a press and Tooling (G) to install a new seal assembly (13) over shaft (12) and into housing (3). Ensure that the outer shell of the seal is fully seated in the housing.

10. Lubricate pump shaft (12) on bearing housing (3) with clean engine oil. Position impeller (9) on the pump shaft.
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    Illustration 6	g01035846

11. 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 0.0 ± 0.15 mm (0.0 ± 0.006 inch).
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    Illustration 7	g01035264

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

13. Position bearing housing (3) in housing (5). Install washers and bolts (7) finger tight.
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    Illustration 8	g01036084

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

15. Use Tooling (F) 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 9	g01036014

16. 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).

17. 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).

18. 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).

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

End By:

1. Install the water pump.