The relief valve plunger adjustment is provided to
automatically reduce the steering pressure when the road wheels have reached the turn
limits. This keeps the supply pump from operating at its maximum relief pressure and
therefore reducing the steering system operating temperature and stress loads.
Adjustment Procedure
Start engine and allow it to operate at idle speed.
With full weight of the vehicle on all wheels, turn
steering wheel in one direction until a high pressure hiss is heard or the axle stops
contact.
Adjust the relief valve plunger in or out until the high
pressure hiss is heard when there is a clearance of 1/8 or 3/16 inch between the axle
stops.
