Bendix Commercial Vehicle Systems COMPACT 500 9/87 - Manual (Page 6)

6
IV. PREVENTIVE MAINTENANCE
POWER STEERING OIL
It is important that an approved oil be used to assure proper
operation of the power steering unit. The vehicle
manufacturer’s recommendations should be adhered to.
Once an oil type is in use, it should never be mixed with any
other type. If it should become necessary to change types
of oil, the entire system must be drained following the
procedure below.
DRAINING AND FILLING THE SYSTEM
1. Lift the front axle sufficiently to raise the wheels clear of
the ground.
2. Disconnect the return line at the valve body outlet port.
The outlet port is identified by the arrow which flows out
of the gear. Turn the steering wheel to the left as far as it
will go. Run the engine for 10 seconds at the most until
the oil is drained from the reservoir and pump. Switch off
the engine and turn the steering wheel backwards and
forwards from full lock to full lock until all the oil is drained
out.
3. Clean the outside of the reservoir. Remove the old filter
element. Oil the filter support and assemble with a new
filter.
4. Fill reservoir full of oil.
5. Turn the engine over with the starter motor. (Must be
done in a manner that the engine does not start.) Add oil
as the level drops to avoid air being drawn into the
system.
FIGURE 5
TORSION BAR
ROTARY VALVE
OUTPUT SHAFT
SECTOR GEAR
VALVE NUT
GLIDE RING (3)
INPUT
SHAFT
VALVE
STOP
BALL BEARING
O-RING (3)
NEEDLE BEARING
BOOT OUTPUT
SHAFT
PITMAN
ARM NUT
PISTON
SEAL & GLIDE
RINGS
HOUSING
SPINDLE (BALL
SCREW)
RECIRCULATING
BALLS
LIMITING
POPPET