47-13
 
  
Rear brake calipers, servicing WARNING! 
Note:   
Do not re-use fasteners that are worn or 
deformed in normal use. 
 Some fasteners are designed to be used only 
once, and are unreliable and may fail if used 
a second time. This includes, but is not 
limited to, nuts, bolts, washers, circlips and 
cotter pins. Always follow recommendations 
in this manual-replace these fasteners with 
new parts where indicated, and any other 
time it is deemed necessary by inspection. 
 Install only the complete repair kit when 
performing servicing work. 
 Apply a thin coat of assembly paste to brake 
cylinders, pistons and seals. 
1 - 
Self-locking bolt 
Always replace35 Nm (26 ft lb)Counter-hold guide pin when loosening 
and tightening 
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47-19
      
Aluminum rear brake caliper pistons, 
removing and installing
 
    
Special tools and equipment  
3409 wedge3272 reset and screwout tool3272/1 support plate 
    
Unscrewing piston from the brake caliper housing  
-  Remove piston by turning threaded spindle -A- counterclockwise and 
knurled section -B- clockwise. 
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47-21
 
    
Installing inner sealing lip of protective seal using 3409 wedge  
Note:  
Hold the piston in front of the caliper housing for this procedure. 
    
Turning piston into brake caliper housing to stop  
Note:  
The outer sealing lip of the protective seal will then locate in the piston 
groove.  -  Turn piston in by turning threaded spindle -A- clockwise and knurled 
section -B- counterclockwise. 
Pa
ge 10 of 11 Rear brake cali
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11/20/2002 htt
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play?action=Goto&t
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e=re
pair&id=AUDI.B5.SU03.47.4