TRUCK SERVICE MANUAL
STEERING
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2.
The second method of securing the pitman arm
LUBRICATION
on the output shaft is with a large self-locking
nut, which is threaded onto the end of the output
Keep the power steering pump reservoir filled to
shaft and tightened to specified torque to force
indicator level with SAE10W-30 engine oil.
the pitman arm in place, Fig. 37.
When filling, start the engine. With engine
running, turn steering wheel from left to right and
continue filling until proper level is maintained.
A replaceable type filter element is located in the
pump reservoir. Every 20, 000 miles or 600 hours
remove the reservoir cover and filter element. Clean
inside of reservoir with a lint-free cloth. Install a new filter
element and replace cover.
NOTE: Trucks operating in dusty areas
will require changing the filter element
more often.
Fig. 37
ADJUSTING RELIEF VALVE PLUNGERS
(Adjustable Stops)
1.
Turn bearing cap plunger and the cylinder head
plunger into the gear until they bottom.
2.
Start the engine and allow it to operate at fast
idle speed.
Filling the Hydraulic System
3.
With full weight of the vehicle on all wheels, turn
1.
Fill reservoir to indicated level and replace cap.
the steering wheel until the bearing cap plunger
opens the relief valve. Do not force the steering
2.
Start engine and idle, turning wheels to the full
wheel. You can feel the valve open as the
left and right three times. Shut off engine and
turning effort is increased. Adjust the bearing
refill reservoir to indicated level.
cap plunger outward and continue to turn the
steering wheel until about 1/8" clearance is
3.
Continue operation in step "2" until system
maintained at the wheel stops. Do not change
maintains its proper indicated oil level,
the wheel stop adjustment. Lock the plunger
with jam nut. The same procedure is repeated
4.
Run engine at faster speed and continue turning
for the cylinder head plunger.
wheels slowly from full left to full right and back
again for approximately five minutes to check for
4.
The vehicle is now ready for road testing.
leaks. This will bleed the system of air. Again
refill the reservoir to the indicated level or to 1-
1/2" below top of filler neck on reservoir without
dipstick attached to filler cap.
NOTE: THE ABOVE INSTRUCTIONS
ARE IMPORTANT.
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