32 41 060 Removing and Installing or Replacing Hydraulic Steering Vane Pump

32 41 060 Removing and installing (replacing) vane pump for hydraulic steering gear (N55)







NOTE:
When replacing power steering pump:
Oil reservoir must be replaced in event of metal abrasion, sluggish pump shaft or increased wear.
The filter integrated in the oil reservoir can only absorb a limited amount of foreign particles. If the filter clogs, the hydraulic system can no longer be sufficiently protected.
Metal abrasion is perceived in the oil reservoir as metallically glittering hydraulic fluid.
Replacement of the oil reservoir due to a leak (e.g. at the hose connections) is only required with unavoidable high penetrations of dirt.







WARNING:
Danger of poisoning if oil is ingested/absorbed through the skin.
Risk of injury if oil comes into contact with eyes and skin.

IMPORTANT:
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
Seal off hydraulic lines with seal plugs.







IMPORTANT:
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without colour coding (blue).
For reliable identification:
Aluminium screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).







Necessary preliminary tasks:
- Draw off and dispose of hydraulic fluid from oil reservoir
- Remove front underbody protection
- Remove charge-air duct
- Remove fan cowl
- Remove power steering pump belt pulley







Release hose clamp (1) and detach suction line from power steering pump.

Installation note:
Replace hose clamp.
Align suction line by way of marking (2) to power steering pump connection marking.







Unfasten plug connection (1) and disconnect.
Release screw (2).
Tightening torque 32 41 9AZ.

Installation note:
Replace aluminium screws.
Observe screwing sequence.







Release screws (1).
Tightening torque 32 41 9AZ.

Installation note:
Replace aluminium screws.
Observe screwing sequence.







Turn power steering pump to one side, release screw (1) and detach pressure line (2).
Tightening torque 32 41 6AZ.
Lift out power steering pump.

Installation note:
Replace all sealing rings.
Make sure hydraulic lines are laid without tension and with sufficient distance to adjoining components.







Screw-fastening sequence:
1. Secure power steering pump with screws
2. Tighten side screw to 2 Nm
3. Tighten front screws to 2 Nm
4. Tighten down front screws to jointing torque and angle of rotation
Tightening torque 32 41 9AZ.
5. Release screw at side and check bolting points for gap freedom
6. Tighten down side screws to jointing torque and angle of rotation
Tightening torque 32 41 9AZ.







After installation:
- Fill and bleed hydraulic system
- Check line connections for leak tightness

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