Audi TT 2007 - Page 20

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Clutch pedal remains on floor or does not return to rest position
after recoupling (clutch pedal no longer actuated):
♦ Check whether clutch pedal returns completely to rest posi‐
tion, thus freeing bleeder hole in clutch master cylinder.
♦ The bleeder hole is integrated into the clutch slave cylinder. It
is not visible from the outside.
♦ The clutch hydraulic system can only bleed itself when the
bleeder hole is clear.
♦ Explain to the customer that they should not rest their foot on
the clutch pedal. It can interfere with the self-bleeding function
of the clutch system, because the bleeder hole in the clutch
slave cylinder can not perform its function.
♦ The following can inhibit the self-bleeding function in the clutch
system: loose footwell trim or floor mats, a blocked clutch ped‐
al switch or drivers who constantly rest their foot on the clutch
pedal.
Check the entire hydraulic system for leaks.
♦ Check the brake fluid level in the brake fluid reservoir.
♦ Visually inspect the clutch master and slave cylinders as well
as hose/line assembly with its connecting points for leaks to
outside.
♦ If you find you leaks, you must replace the affected compo‐
nent.
♦ Bleed the clutch system. Refer to
⇒ “1.3 Information Regarding the Removal and Installation of
the Clutch Master or Slave Cylinder”, page 13 .
Pedal force:
♦ Approximately 140 N over entire life of clutch
High pedal force:
♦ Pressure plate/clutch plate mechanical defect. Refer to
⇒ “2.5 Sachs Clutch Assembly Overview”, page 22 or
⇒ “2.6 LuK Clutch Assembly Overview”, page 25 .
Clutch does not disengage or does not disengage completely:
♦ Air in hydraulic system, bleed clutch system. Refer to
⇒ “1.3 Information Regarding the Removal and Installation of
the Clutch Master or Slave Cylinder”, page 13 or check hy‐
draulic system for external and internal leakage
♦ Clutch plate is difficult to move on the drive shaft splines (for
example: due to rust or dirt)
♦ Foreign body in the clutch system
♦ Pressure plate/clutch plate mechanical defect. Refer to
⇒ “2.5 Sachs Clutch Assembly Overview”, page 22 or
⇒ “2.6 LuK Clutch Assembly Overview”, page 25 .
♦ Incorrect components installed or components missing (for
example intermediate plate or alignment sleeves) during re‐
pair work.
Audi TT 2007 ➤
Manual Transmission - Edition 10.2009
14 Rep. Gr.30 - Clutch