325F Excavator Machine Systems Drift Reduction Valve (Stick) - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Release the system pressure.

1. Drain the hydraulic oil. Refer to the Operation and Maintenance Manual, "Hydraulic System Oil - Change" for the proper draining and filling procedure.
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   Illustration 1	g01346342

2. Remove bolts (1) and remove guard (2).
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3. Remove panel (3) and remove panel (5).

4. Remove hand rail (4).
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5. Drift reduction valve (6) is on the front left side of the main control valve.

6. Disconnect the hose assemblies connected to drift reduction valve (6).
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7. Remove bolts (7) and drift reduction valve (6).
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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.

8. Remove plugs (15) and plug (8) and the O-ring seals.

9. Remove plug (19) and O-ring seal (18). Remove spring (17) and guide (16).

10. Remove bolts (14) and cover (13). Remove back-up ring (12) and O-ring seal (11). Remove spring (10).

11. Remove relief valve (9).
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    Illustration 6	g06015382

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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.

12. Remove nut (20) and valve body (27). Remove O-ring seals (21), (22), (24), and (28). Remove ring seals (23) and (26).

Installation Procedure

1. Install drift reduction valve (6) in the reverse order of removal.

   1. Tighten nut (20) to a torque of 19 ± 2 N·m (173 ± 17 lb in).

   2. Tighten valve body (27) to a torque of 60 ± 6 N·m (44 ± 4 lb ft).