32 41 009 Checking function of power steering vane pump
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- 32 4 000
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.
Close off pipe connections with plugs.
IMPORTANT:
Prior to this check, first check all hose connections, the vane pump and the power steering gear for leaks.
Necessary preliminary tasks:
- Draw off and dispose off hydraulic fluid from fluid reservoir Observe country-specific waste-disposal regulations
- Remove front assembly underside protection
- Disconnect pressure line from vane pump
Connecting special tool:
Connect special tool 32 4 000 (refer to Notes on use ) with new sealing rings to vane pump and pressure line.
- Connection, vane pump
- Connection, power steering gear
Checking pump pressure:
- Close valve (A).
- Open valve (B).
- Fill and bleed hydraulic system
- Start engine.
- Heat hydraulic fluid to approx. 50 °C by moving steering wheel at increased engine speed.
- Close valve (B) for max. 10 secs. and read off pressure.
- Compare measured pressure with specified nominal pressure
.
Replace vane pump if the nominal pressure is exceeded by more than 10 %.
Check belt tension if the nominal pressure is undershot by more than 10 %. Replace vane pump if belt tension is OK.
After installation:
- Fill and bleed hydraulic system
- Check pipe connections for leaks