FILM 2087876 - Caterpillar

Pressure Compensator Adjustment
Steering Frame Lock Link Installed
(1) Steering frame lock link.1. Install steering frame lock link (1) so the machine can not turn.
Steering System Pressure Tap
(2) Pressure tap. (3) Pressure compensator.2. Assemble the necessary hoses and pressure gauge to pressure tap (2).
View Of Main Steering Pump With Pressure And Flow Compensator Group
View A-A
(4) Pressure compensator spool. (5) Adjustment screw. (6) Locknut. (7) Cap.3. Start the engine and operate it at high idle.4. While observing the gauge, move the STIC control lever in both directions until the relief valve opens. Note the gauge reading in each direction. The correct pressure compensator setting equals 31 000 400 kPa (4500 60 psi). Do not keep the control lever in either turn position at the relief valve setting for more than five seconds.5. If the pressure is not the same in both directions, there is a problem in the shuttle valve. If the pressure is the same in both directions, but the pressure is not correct, the pressure compensator needs to be adjusted.6. Stop the engine.7. Remove cap (7), and loosen locknut (6). To increase the pressure setting, turn adjustment screw (5) clockwise. To decrease the pressure setting, turn adjustment screw (5) counterclockwise.8. After turning adjustment screw (5) to obtain the correct pressure reading, tighten locknut (6), and replace cap (7).9. Start the engine and operate it at high idle. Repeat Steps 4 and 5.10. If the pressure is correct, stop the engine.11. If the pressure is not correct, repeat Steps 7, 8, and 9.12. After the correct pressure setting is obtained, stop the engine.13. Remove the hoses and pressure gauge that was attached to pressure tap (2) in Step 2.14. Remove the steering frame lock link.Margin Pressure Adjustment Procedure
Make reference to the S on the first page of the Steering System Testing And Adjusting section.
1. Install the steering frame lock link.2. Stop the engine. Move the STIC control lever right and left to release any steering pilot oil pressure.3. Slowly loosen the hydraulic oil tank fill cap to relieve any pressure. Pressure may be trapped in the steering cylinders. To relieve any pressure, perform the following step.
Right And Left Turn Pressure Tap Locations
(1) Left turn pressure tap. (2) Right turn pressure tap.4. Connect a drain hose equipped with quick disconnects from left turn pressure tap (1), to the hydraulic oil tank. Connect a drain hose equipped with quick disconnects from right turn pressure tap (2), to the hydraulic oil tank.5. Move the STIC control lever all the way to the left, and then all the way to the right. Repeat this step until there is no wheel movement from side to side.6. Remove the drain hose assemblies after all steering pressure has been relieved.
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