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1.Disconnect the pressure
hose from the oil pump, and then connect following special
tools.
- Power steering oil pressure gauge
(MB990662)
- Power steering oil pressure gauge adapter (pump
side) (MB991548)
- Power steering oil pressure gauge adapter (hose
side) (MB991549)
2.Bleed air, and 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.The engine should be
idling. 4.Disconnect the connector for the oil
pressure switch, and place an ohmmeter at the
switch. 5.Gradually close the shut-off valve of
the pressure gauge and increase the hydraulic pressure, then
check whether or not the hydraulic pressure that activates
the switch is the standard value. Standard
value: 1.65 - 2.0 MPa <Petrol powered
vehicle> 1.5 - 2.0 MPa
<Diesel powered
vehicle> 6.Gradually open the shut-off
valve and reduce the hydraulic pressure; then check whether
or not the hydraulic pressure that deactivates the switch is
the standard value. Standard value: 1.2
MPa or more <Petrol powered
vehicle> 0.5 - 2.0 MPa
<Diesel powered vehicle> 7.Remove
the special tools, and then tighten the pressure hose to the
specified torque. Tightening torque: 57 ±
7 N·m 8.Bleed the system.
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