Input Shaft, Checking For Wear

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2016 Audi A4, 2015 Audi A4, 2014 Audi A4, 2013 Audi A4, and 2012 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Overview Of Input Shaft With Lining Discs

Courtesy of AUDI OF AMERICA, LLC

3 -Lining Discs
6 -Pressure Plate
- Checking for wear. Refer toFig 2
7 -Piston
- Checking for wear. Refer to Fig 2
8 -Cover
- for the input shaft
- Checking. Refer to Fig 6.
10 -Ball Bearing
- For the input shaft
- Replace the ball bearing after removing the input shaft cover
11 Input Shaft-
- Check running and sealing surfaces for wear. Refer to Fig 3.
- Checking for signs of wear on the lining discs. Refer to Fig 4
13 -Oil Pipe
- Checking for wear. Refer to Fig 5

Fig 2: Identifying Inner Running And Sealing Surfaces Of Thrust Plate And Pistons

Courtesy of AUDI OF AMERICA, LLC

-- Remove pistons -1- from thrust plate -2-.

Check Thrust Plate -2- :

-- Check thrust plate running and sealing surfaces -arrow A- for wear.

-- Check thrust plate running and sealing surfaces -arrow D- for wear.

If running or sealing surfaces -arrow A- show grooves, scratches or scoring, thrust plate -2- must be replaced.
If running or sealing surfaces -arrow D- show grooves, scratches or scoring, thrust plate -2- and pistons -1- must be replaced.

Checking Pistons -1- :

-- Check seal -arrow B- on outer piston circumference -1- for damage.

-- Check running surface -arrow C- on interior piston circumference -1- on shaft.

If seal -arrow B- is damaged or piston running surface -arrow C- shows grooves, scratches, scoring or uneven thickness from wear, piston -1- must be replaced.

Fig 3: Checking Input Shaft Cylinder Running And Sealing Surfaces For Wear

Courtesy of AUDI OF AMERICA, LLC

-- Check input shaft running and sealing surfaces -arrow A- for wear.

NOTE:

Shaft seal in input shaft cover seals at this sealing surface -arrow A-.

Light scoring from shaft seal is normal.

-- Check the contact surface -arrow B- on the input shaft ball bearing inside the input shaft cover for wear.

-- Check shaft seal -arrow C- on the input shaft for damage.

If seal -arrow C- is damaged or shaft running surfaces -arrow B- or -arrow A- show deep scoring or grooves, entire input shaft must be replaced.

Fig 4: Checking Inner Circumference Of Input Shaft Cylinder For Scoring From Lining Discs

Courtesy of AUDI OF AMERICA, LLC

-- Check inner circumference of input shaft cylinder for scoring from lining discs -arrows-.

If there is scoring on interior circumference of input shaft cylinder from lining discs -arrows-, entire input shaft must be replaced.

Fig 5: Checking Oil Pipe For Wear

Courtesy of AUDI OF AMERICA, LLC

-- Check oil pipe seal -1- for damage.

The seal must have a gap -arrow B-.
If the gap -arrow B- is completely closed, oil pipe must be replaced.

-- Check oil pipe running surfaces -arrows- and rotor blades -arrow A- for wear and damage.

If seal -1- or rotor blades -arrow A- are damaged or contact surfaces -arrow- show deep scoring or grooves, oil pipe must be replaced.
The o-ring -2- must be replaced.

-- Check the contact surface on the oil pipe in the suction jet pump

Fig 6: Checking Input Shaft Cover

Courtesy of AUDI OF AMERICA, LLC

-- Check the contact surface on the cover -arrow- and the cover for damage.

The contact surface must not show any damage.
Input shaft cover must not be broken cracked.

-- If the contact surface or the cover are damaged, then replace the input shaft cover.