ADJUSTABLE RELIEF VALVE
TESTING AND ADJUSTMENT
WARNING: Never disconnect any hy-
draulic line or fitting with the unit in
the raised position. Always lower the
unit and relieve pressure before removing
any lines or caps. Allow the system to cool
down before draining oil or handling system
components. Serious burns can result from
contact with hot oil.
Test Conditions:
WARNING: Vehicle engine must be
running for this procedure. Make sure
that there is adequate ventilation in
test area and/or that vehicle exhaust is vent-
ed outside of test area building. FAILURE TO
HEED CAN RESULT IN SERIOUS INJURY OR
DEATH.
- Vehicle battery is fully charged.
- Hydraulic oil level is to “Fill Line.”
Procedure:
Park vehicle in an area with adequate ventilation
and with enough room to safely angle the plow.
Set park brake. Lower the plow. Remove pump
cover.
PHOTO NO. 1000387
Carefully disconnect the hydraulic fitting from
the valve assembly.
Using the proper fittings, install a 0-3000 PSI
pressure gauge as shown. See photo.
Start the vehicle. While holding the joystick in
the FULL UP position, record the pressure read-
ing.
A change in pitch from the hydraulic motor should
be heard and a pressure of 2000 PSI +/- 100
should be indicating on the pressure gauge.
If pressure readings are high or low, refer to the
following adjustment procedures.
Adjustment:
PHOTO NO. 1000294A
Adjustable Relief Valve Testing and Adjustment 31
