BMW 740iL Repair Manual download pdf (Page 9)

Level Control Systems

Control Valve

The rotary control valve located on the rear suspension has three positions:

• Raise

• Level

• Lower

The control lever is attached to the rear stabilizer bar to sense vehicle loading. When the

vehicle is loaded (passenger or luggage) the suspension drops and the stabilizer bar twists.

The control lever is moved in the "raise" direction.

With the engine running, oil flows from the pump to the bottom of the rear struts. The body

of the car is lifted and the control lever returns to the level position.

In the level position, the oil

bypasses the valve and

returns to the reservoir

through the return line.

A minimum pressure of

440 Psi (30bar) is main-

tained at all times. If ser-

vice is required, a bleed off

valve is installed on the

control valve to drain the

systems pressure.

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BMW 740iL Repair Manual Page 9