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Clutch "C” > < Clutch "A”

A4 Cabriolet Mk2

Clutch “E”
   
Clutch “E”
1 - Rectangular section seals
q   Checking for wear → Fig.
3 - Cylinder “E”
q   Checking running surfaces of shaft and brass bush for wear → Fig.
q   Checking weld seam between shaft and cylinder → Fig.
q   Check splines
7 - Dished spring
q   Renew if there are traces of scoring or if ends of dished spring are bent.
12 - Outer plate
q   Checking for wear → Fig.
13 - Friction plate
q   Checking for wear → Fig.
 - 

   
Checking rectangular section seals for wear
  Note
Always renew rectangular section seals. Nevertheless, the wear pattern on the rectangular section seals gives an indication of the condition of the contact surface for the seals. For this reason it is always advisable to check the rectangular section seals for wear.
If the axial wear -arrow 1- on the rectangular section seals is excessive (slight wear on the outside corners is normal):
–  Renew cylinder “E”.
If the radial wear on the rectangular section seals exceeds 0.3 mm -arrow 2- (compare with thickness of new rectangular section seal):
–  Renew stator shaft → Item.
  Note
If the rectangular section seals are worn, the torque converter lock-up clutch may also be worn due to insufficient closing pressure.
  A37-10253
Checking running surfaces of cylinder “E” shaft and brass bush for wear
–  Check running surfaces of brass bush -arrow 2- on inside of shaft and running surfaces on outside of shaft -arrows 1- for wear.
l  The running surfaces should not have any deep scoring and/or blue discoloration.
If there are deep scores and/or blue discolouring:
–  Renew cylinder “E”.
Proceed as follows if the running surfaces have no blue discoloration and there is only slight scoring:
–  Rub down running surface one or two times with abrasive paper and oil (grain size 600).
–  Clean running surface thoroughly with clean cloth and check running surface.
l  The running surfaces should now be in as-new condition.
If scoring is still present after this step:
–  Renew cylinder “E”.
  A37-10317
Checking weld seam between shaft and cylinder
–  Check for leaks at weld seam between shaft and cylinder “E” by applying a very small force to the shaft with a screw press (use plastic insert -1- under the press).
If the shaft is loose, or if cracking is visible in the area marked with -arrows-:
–  Renew cylinder “E”.
  Note
The gearshift from 4th to 5th gear will not operate if cylinder “E” is leaking.
  A37-10374
Checking friction plates and outer plates for wear
Signs of overheating on the outer plates indicate that the friction plates are worn. Assess the degree of wear as described below:
A - Heat discoloration spots at intervals of more than 20 mm: outer plates and friction plates are OK; they can be used again.
B - Heat discoloration spots at intervals of less than 20 mm: outer plates and friction plates are worn and require renewal.
C - If outer and/or inner parts of outer plates are discoloured blue or brown: outer plates and friction plates are worn and require renewal.
  A37-10212

Clutch "C” > < Clutch "A”