794 AC Off-Highway Truck Machine Systems Caterpillar


Solenoid and Manifold Valve (Steering) - Remove and Install

Usage:

794 AC HRT

Removal Procedure

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

Personal injury or death can occur from heavy components falling during removal or installation.

Properly support the component with a suitable lifting device during removal or installation.


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

At operating temperature, the hydraulic tank is hot and under pressure.

Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.

Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure.


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

Personal injury or death can result from escaping fluid under pressure.

Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

Always use a board or cardboard when checking for a leak.



NOTICE

Do not allow any dirt or foreign material to get into the hydraulic system during assembly, connection of lines, when components are filled with fluid, or during any maintenance operation.


  1. Prepare the machine for maintenance. Refer to Operation and Maintenance Manual , "Prepare the Machine for Maintenance".

  2. Shutdown and de-energizing the machine. Refer to Operation and Maintenance Manual, "Electrical Shutdown and Voltage Discharge".


    Illustration 1g03893519

  3. Disconnect hose assemblies (1), hose assemblies (2), and harness assemblies (3).


    Illustration 2g03893539

  4. Disconnect hose assembly (4) and hose assemblies (5).


    Illustration 3g03893559

  5. Attach a suitable lifting device onto solenoid and manifold valve (6). The weight of solenoid and manifold valve (6) is approximately 19 kg (42 lb).

  6. Remove nuts (7) , washers (8), and bolts (9). Remove solenoid and manifold valve (6).

Installation Procedure

  1. Install solenoid and manifold valve (6) in the reverse order of removal

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