PL83 and PL87 Pipelayers Machine Systems Caterpillar

Removal Procedure

Start By:

1. Release 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	g02711269

1. Remove cover (1) if equipped.

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Illustration 2	g03833007

2. Disconnect hose assemblies (2). Disconnect bracket (3) .

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

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Illustration 3	g03833008

4. Remove counterbalance valve (counterweight) (6) .

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Illustration 4	g03833009

5. Remove O-ring seals (6) and backup rings (7) .

Installation Procedure

1. Install counterbalance valve (counterweight) (4) in the reverse order of removal.

   1. Tighten counterbalance valve (counterweight) (4) to a torque of 65 ± 5 N·m (48 ± 4 lb ft).