32 41 009 Checking function of power steering vane pump

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 528xi, 2009 BMW 535xi, 2009 BMW 528xi, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

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: 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
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: Disconnecting Power Steering Gear 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

Courtesy of BMW OF NORTH AMERICA, INC.

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
Version with Dynamic Drive: If necessary, carry out INITIAL DYNAMIC DRIVE OPERATION

Fig 3: Identifying Special Tool 32 4 000 And Valve

Courtesy of BMW OF NORTH AMERICA, INC.