120M Series 2 and 120M2 Motor Graders Machine Systems Caterpillar


Secondary Steering Pump and Motor - Remove

Usage:

120M 2 M92

Removal Procedure

Table 1
Required Tools    
Tool     Part Number     Part Description     Qty    
A     311-1362     Vacuum Cap     1    
B     1U-9744     Floor Jack     1    

Start By:

  1. Connect the steering frame lock.

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

Hydraulic oil pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can result if this pressure is not released before any service is done on the hydraulic systems. In order to prevent possible injury, release the hydraulic system pressure before working on any fitting, hose, or hydraulic component.

Lower all attachments to the ground before service is started. If the hydraulic system must be serviced, tested, or adjusted with the attachment in the raised position, the attachments and lift cylinders must be supported properly.

Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made.

----------------------

  1. Refer to Operation and Maintenance Manual, "System Pressure - Release".



    Illustration 1g02731334

  1. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose onto Tooling (A). Apply 138 kPa (20 psi). This procedure will pull a vacuum on the hydraulic system.

  1. Refer to Operation and Maintenance Manual, "Battery Disconnect Switch".



    Illustration 2g01415825

  1. If equipped, position Tooling (B) under plate (2). Remove bolts (1). Remove plate (2). The weight of plate (2) is approximately 45 kg (100 lb).



    Illustration 3g02731353

  1. Disconnect cable assembly (3), ground strap (4), and wire assembly (5) .



    Illustration 4g02731354

  1. Disconnect hose assemblies (6). Disconnect clamps (7). Use Two people to remove secondary steering pump and motor (8). The weight of secondary steering pump and motor (7) is approximately 27 kg (60 lb).

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