Inspection And Mounting Of The Servo Steering; Checking The Hydraulic Fluid Level; Filling And Bleeding The Steering System - Porsche 911 GT3 Cup 2008 Technical Handbook

Inspection and mounting of the servo steering

Important notice:

Checking the hydraulic fluid level:

Filling and bleeding the steering system:

The rack and pinion steering and servo pump must not be
repaired and/or dismantled.
The fluid level of the servo steering is measured using the dip stick fitted
to the servo oil reservoir cap.
The engine must be running at idle speed when checking the fluid level
Do not turn the steering when checking the fluid level.
The hydraulic steering oil reservoir must be filled to the 'max' mark and
the engine started briefly after repair or maintenance work has been
carried out in which hydraulic oil has been lost. This procedure should
be repeated until the fluid level in the reservoir remains constant.
The fluid level in the hydraulic steering oil reservoir must never drop
below the 'min' mark to prevent damage occurring to the servo pump.
To bleed the hydraulic system after topping up the oil, rotate the
steering wheel quickly and repeatedly from one lock to the other. The
bleeding process is finished when fluid level remains constant and no air
bubbles surface in the reservoir when the steering wheel is turned back
and forth.
When checking the hydraulic system visually for leakage, rotate and hold
the steering wheel in the full lock position to ensure the greatest
possible line and system pressure with the engine idling,. Check all the
lines, pipes and fittings for leakage. When implementing the test this
level of system pressure should be held for an absolute maximum of ten
seconds.
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