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.
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| RECIRCULATING |
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| BALLS |
ROTARY VALVE |
| SPINDLE (BALL | |
LIMITING | SCREW) | ||
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| VALVE NUT | POPPET | HOUSING |
GLIDE RING (3) |
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INPUT
SHAFT
SEAL & GLIDE
RINGS
PISTON
VALVE
STOPOUTPUT SHAFT SECTOR GEAR
BALL BEARING
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| PITMAN |
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| ARM NUT |
| NEEDLE BEARING |
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TORSION BAR | BOOT | OUTPUT | |
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| SHAFT | |
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FIGURE 5
6