324E and 329E Excavators and 329E MHPU Mobile Hydraulic Power Unit Machine Systems Caterpillar

Removal Procedure

Start By:

1. Release the hydraulic system pressure.

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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

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Illustration 1	g02456496

1. Disconnect hose assembly (2) and harness assembly (3) from solenoid valve (5) .

2. Disconnect bracket (1) and reposition.

3. Remove bolts (4) and solenoid valve assembly (5) .

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Illustration 2	g02456604

4. Remove solenoid valve (6) .

5. Remove O-ring seal (7), backup ring (8), and O-ring seal (9) from solenoid valve (6) .

6. Remove bolts (11) and plate (10) .

Installation Procedure

1. Install solenoid valve (5) in reverse order of removal.

   1. Tighten solenoid valve (6) to a torque of 180 ± 10 N·m (138 ± 7.4 lb ft).