Porsche 996 TT, Repair Manual

Page: 170 / 2099

03 Steering gear: fluid level and bellows
Power steering: checking the fluid level
Steering gear: visual inspection of the bellows
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Power steering: checking the fluid level
General
Damage to the power steering is caused by a shortage of oil in the hydraulic system. Even small leaks can
cause the fluid to escape and damage the servo pump as a result of the high oil pressure occurring in the
hydraulic circuit.
Grunt−like noises that can be heard when the steering is locked, or foam formation in the reservoir indicate a
shortage of oil and/or that air has also been sucked in. Before filling the reservoir, any existing leaks must be
eliminated on the suction side. Alternatively, the defective part on the pressure side should be replaced.
For the Turbo, not only the power steering is supplied from the collective supply tank −A− located in the
engine compartment, but also the hydraulic clutch boost. The supply tank for GT2 has a different form. It is
located in the engine compartment.
Only Pentosin CHF 11 S may be used in the reservoir. Pentosin CHF 11 S can be ordered with the following
part number: Quantity supplied 1 litre = 000.043.203.33.
Note
There is a second tank for clutch operation for the Turbo. This container is located in the luggage
compartment (under a cover). •
Power steering: checking the fluid level
03 Steering gear: fluid level and bellows 107