32 41 009 Checking function of power steering vane pump

WARNING: This page is about a different car, the 2010 BMW 528i, 2009 BMW 528i, and 2008 BMW 528i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

32 4 000 . See STEERING AND WHEEL ALIGNMENT - SPECIAL TOOLS.

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: 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.

Recycling:

Catch and dispose of hydraulic fluid in a suitable container.

Observe country-specific waste-disposal regulations

Necessary preliminary tasks:

Draw off and dispose of hydraulic fluid from fluid reservoir
Remove front underbody protection . See 51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION .
Disconnect pressure line from vane pump

Version with Dynamic Drive only:

NOTE:

Pressure line to valve block (Dynamic Drive)
Pressure line to power steering gear
Suction line from fluid reservoir

Fig 1: Identifying Power Steering Pressure Line, Fluid Reservoir Suction Line And Valve Block Pressure Line

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying Special Tool (32 4 000) With Power Steering Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Checking pump pressure:

Close valve (A).
Open valve (B).
Fill and bleed hydraulic system or power steering (version with Dynamic Drive) .
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.

Fig 3: Identifying Special Tool (32 4 000)

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Fill and bleed hydraulic system or power steering (version with Dynamic Drive) .
Check pipe connections for leaks
Version with Dynamic Drive: If necessary, carry out initial Dynamic Drive operation . See 37 10 001 INITIAL OPERATION WITH TEST RUN OF DYNAMIC DRIVE .