336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Solenoid Valve (Negative Flow Control, Proportional Reducing Valve) - Remove and Install Caterpillar


Solenoid Valve (Negative Flow Control, Proportional Reducing Valve) - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

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

------ 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.

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    Illustration 1g02138737

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

  1. Open the access door to the main pump.



    Illustration 2g02155699

  1. Disconnect harness assemblies (1) and hose assemblies (3). Remove bolts (2) and solenoid valve (4) .

Installation Procedure

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

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