Porsche 996 TT, Repair Manual

Page: 152 / 2099

03 Clutch: checking the play and pedal end position
Checking clutch free play
Checking the pedal end position (pedal return/return force)
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Checking clutch free play
The clutch master cylinder has an inner stop. The push rod and the clutch pedal are always pressed against this
stop by the boost spring. Due to the automatic hydraulic adjustment of the clutch, it is not possible to
determine the clutch play by checking at the clutch pedal.
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Checking the pedal end position (pedal return/return force)
Check that the pedal is in end position by pulling at the pedal (without the use of force) towards the
driver's seat.
Note
The pedal must not give way during the process. •
If it gives way, the fault is in the boost spring or in the pedals. •
The clutch push rod and the boost spring are not adjustable. The boost spring has 2 functions, namely to
provide pedal force assistance and to return the pedal. The following are some of the points which are
requirements for perfect clutch operation:
Correct bleeding of the clutch hydraulics. •
No leaks in the hydraulic system. •
Pedal return to the starting position. •
Installation position of the pedals in accordance with the series condition.
•
996420, 996421, 996450, 996451, 996620, 996621, 996650, 996651, 996840, 996841
03 Clutch: checking the play and pedal end position 89