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1.Disconnect the power
steering oil pressure hose from the power steering oil pump
(Refer to
<L.H.drive vehicles>,
<R.H.drive vehicles>), and then connect
following special tools.
- Power steering oil pressure gauge
(MB990662)
- Oil pressure gauge adapter A (pump side)
(MB991548)
- Oil pressure gauge adapter B (hose side)
(MB991549)
2.Bleed air, then turn the steering wheel
several times while the vehicle is not moving so that the
temperature of the fluid rises to approximately 50 -
60°C. 3.Start the engine and allow it to
idle.
caution |
The pressure gauge shut-off
valve must not remain closed for more than 10
seconds.
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4.Fully close the shut-off valve of the
pressure gauge and measure the power steering oil pump
relief pressure to confirm that it is within the standard
value range. Open it again immediately after checking the
pressure. Standard value: 8.5 - 9.0
MPa 5.If it is not within the standard
value, replace the power steering oil
pump. 6.Check whether or not the hydraulic
pressure is the standard value when no-load conditions are
created by fully opening the shut-off valve of the pressure
gauge. Standard value: 0.5
MPa 7.If it is not within the standard
value, the probable cause is a malfunction of the oil line
or steering gear, so check these parts and repair as
necessary. 8.Turn the steering wheel all the way
to the left or right; then check whether or not the
retention hydraulic pressure is the standard
value. Standard value: 8.5 - 9.0
MPa 9.If not the standard value, overhaul
the steering gear. Remeasure fluid pressure. 10.
Remove the special tools, and then tighten the power
steering oil pressure hose to the specified
torque. Tightening torque: 57 ± 7
N·m 11. Bleed the system (Refer to
).
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