32 41 009 Checking function of power steering vane pump
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Special tools required:
- 32 4 000
IMPORTANT:
Prior to this check, first check all hose connections, the vane pump and the power steering gear for leaks.
Adhere to the utmost cleanliness. Do not allow any dirt to enter the hydraulic system.
After installation:
- Fill and Bleed Hydraulic System
- Check pipe connections 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.