336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Check Valve (Cooler Bypass) - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Release the system hydraulic pressure.

1. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the correct draining and filling procedures.
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   Illustration 1	g02139958

2. Remove cover assembly (1).
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   Illustration 2	g02139959

3. Remove bolts (4) in order to disconnect tube assemblies (5) from check valve (3).

4. Remove bolts (2) and check valve (3).
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   Illustration 3	g02140372

5. Remove adapter (7) and O-ring seal (6). Remove valve assembly (9) and O-ring seal (8).

6. Remove valve assembly (10) and O-ring seal (11).

Installation Procedure

1. Install check valve (3) in the reverse order of removal.

   1. Tighten bolts (2) to a torque of 80 ± 8 N·m (60 ± 6 lb ft).

   2. Tighten bolts (4) to a torque of 50 ± 10 N·m (37 ± 7 lb ft).