Ribbed belt drive for vane pump, alternator, coolant pump and viscous fan — AUDI

AFF AFN AHH AHU AVG
Note:

Mark the direction of rotation with chalk or felt pen before removing the ribbed belt. If the belt rotates in the wrong direction when it is refitted, this can cause breakage. Ensure that the belt is properly seated on the pulleys when installing.

10 Nm
Fan wheel
For viscous fan
Removing and installing
=> Page
13-13

25 Nm
Ribbed V-belt
Removing and installing
=> Page
13-19
Check for wear

Bolt
Bolt with strength rating 8.8: tighten to 25 Nm.
Bolt with strength rating 10.9: tighten to 35 Nm.

=> Parts List

Vibration damper
With pulley for ribbed V-belt
Can only be installed in one position. Holes are offset

Tensioning element for ribbed V-belt
Turn with open end spanner to slacken ribbed belt => Page
13-19
(lock carrier in service position)

Removing:

Remove ribbed belt
=> Page
13-19
Remove viscous fan
=> Page
13-13
Remove rear tensioner.

Installing: only possible in one position

Pulley
For viscous fan
Removing and installing
=> Page
13-13

Circlip
For viscous fan bearing
Removing and installing => Page
13-22

O-ring
Replace

25 Nm
Tightening sequence =>Fig.
1

Bracket
for engine cover

25 Nm
Tightening sequence =>Fig.
1

Alternator
Removing:

Detach battery earth strap.
Slacken ribbed belt and take belt off alternator => Page
13-19
(lock carrier in service position).
Remove viscous fan
=> Page
13-13
Disconnect electrical wiring from alternator.
Disconnect connector, move electrical wiring clear.
Remove bottom bolts from bracket.
Remove alternator

To facilitate the positioning of alternator on bracket, knock back bush for retaining bolt slightly

45 Nm
25 Nm
45 Nm
25 Nm
Bracket
For alternator, vane pump and viscous fan
Removing and installing
=> Page
13-25
with coolant pump and thermostat

Vane pump
For power steering
Removing and installing:

=> Running gear FWD and 4WD; Repair group 48; Power steering/oil circuit 4-cyl. engine; Removing and installing vane pump
Running gear FWD and 4WD
Power steering/oil circuit 4-cyl. engine
Removing and installing vane pump

25 Nm
Mounting
For viscous fan
Removing and installing
=> Page
13-22

10 Nm
Pulley
For vane pump

25 Nm
Pulley
For coolant pump

Viscous coupling
Removing and installing
=> Page
13-13

Fig.1
Tightening sequence of bracket for alternator, vane pump and viscous fan

Tighten bolts in number sequence -1 ... 5- 25 Nm.