793B TRUCK MACHINE SYSTEMS Caterpillar

1. Drain the oil from the steering system.

2. Remove relief valve (1) from valve body (2).

NOTE: The following steps are for installation of the steering relief valve.

3. Install relief valve (1) into valve body (2). Tighten relief valve (1) to a torque of 65 ± 5 N·m (48 ± 4 lb ft).

4. Fill the steering system hydraulic tank with oil to the correct level. See the Maintenance Manual.

Disassemble & Assemble Steering Relief Valve (Backup)

Start By:

a. remove steering relief valve.

1. Remove O-ring (6).

2. Remove O-ring seal nut (2) and two O-ring seals (3).

3. Remove nut (2), gasket (3), and the setscrew.

4. Remove two washers (4), spring (5), plate (7) and valve (8).

NOTE: The following steps are for assembly of the steering relief valve.

5. Install valve (8), plate (7), spring (5), and two washers (4) into the body.

6. Install O-ring (3) on retainer assembly (1). Install retainer assembly (1) and O-ring seal nut (2). Torque O-ring seal nut (2) to 50 ± 7 N·m (37 ± 5 lb ft).

NOTE: The minimum inspection torque for O-ring seal nut (2) is 38 N·m (28 lb ft).

7. Install the other O-ring seal (3).

8. Install O-ring seal (6).

NOTE: See the System Operation/Testing and Adjusting Manual for adjustment procedures.

End By:

a. install steering relief valve.