336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Control Manifold (Pilot Oil) - Remove and Install - Hydraulic Lockout, Swing Brake, Travel Caterpillar


Control Manifold (Pilot Oil) - Remove and Install - Hydraulic Lockout, Swing Brake, Travel
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
311-1362  Vacuum Gauge Gp 
Loctite 271 

Start By:

  1. Release the hydraulic system pressure.

------ WARNING! ------

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.




    Illustration 1g02138430

  1. Remove the cap from the hydraulic tank. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose to Tooling (A). Apply 276 to 414 kPa (40 to 60 psi) of air. This procedure will pull vacuum on the hydraulic system.


    Illustration 2g02138375

  2. Remove bolts (2) and plate assembly (1).


    Illustration 3g02138376

  3. Disconnect hose assemblies (3) and harness assemblies (5) from control manifold (6).

  4. Remove bolts (4) and control manifold (6).


    Illustration 4g02138434

  5. Remove accumulator (7). Remove plate (8) from control manifold (6).

Installation Procedure

  1. Install control manifold (6) in the reverse order of removal.

    1. Apply Tooling (B) to the threads of bolts (2).

    2. Check the hydraulic oil level. Refer to , "Hydraulic System Oil Level - Check".

Information System:

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