STEERING SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
PISTON PUMP (STEERING AND PILOT) MARGIN PRESSURE
TEST AND ADJUSTMENT - CONTINUED
N OT E
Pressure compensator valve is attached to top of steering piston pump.
Remove cap from pressure tap (6) of pressure com-
pensator valve (3).
hose to pressure tap (6).
Position both gages to be easily read.
Run engine at low idle. Check for hydraulic oil leaks.
Run engine at high idle.
Slowly turn steering wheel to left or right.
Record readings on both gages as steering wheel is turned.
Margin pressure is difference between discharge pressure of steering piston pump and signal pressure to steering meter-
ing pump. Margin pressure should be 520 ± 15 psi (3,600 ± 100 kPa).
If margin pressure is not correct, perform Piston Pump (Steering and Pilot) Low Pressure Standby Test and Adjustment
and Piston Pump (Steering and Pilot) High Pressure Stall Test and Adjustment, in this work package, before making any
adjustments to pump controller.
Remove hoses and gages.
Install left and right chassis covers (WP 0107 00).