Removing and installing decoupler pulley with freewheel
In this manual: Electrical system
~2min read
Tightening torque found on this page
General description
There are different versions of decoupler pulleys with freewheel.
Before removing the decoupler pulley with freewheel, it must be determined which special tool must be used.
Caution The length of the poly V-belt depends on the version of decoupler pulley with freewheel installed. Please check which type of the decoupled pulley with freewheel is installed in order to ensure installation of the correct poly V-belt. Refer to ETKA for proper allocation of the poly V-belt.
Distinguishing between different versions of decoupler pulleys with freewheel:
-A- decoupler pulley with freewheel, small; use special tool T10474
-B- decoupler pulley with freewheel, large; use special tool 3400
Note Poly V-belts used for large decoupler pulleys with freewheel must be longer (due to larger diameter of the pulley), and vary depending on the installation of an air conditioning system in the vehicle.
Special tools and workshop equipment required
Multipoint adapter -T10474-
Multipoint adapter -3400-
Torque wrench -V.A.G 1332-
Ratchet wrench bit, 8 mm hexagon or TORX T50
Removing:
Remove alternator → Chapter.
Clamp alternator in a vice at securing points.
Remove protective cap, if fitted, from decoupler pulley with freewheel.
Insert multipoint adapter -T10474- or multipoint adapter -3400--1- into pulley, and fit a ring spanner.
Insert suitable tool -2- into alternator shaft.
Turn alternator shaft clockwise to loosen it while counterholding with ring spanner.
Hold decoupler pulley with freewheel stationary with your hand, and turn alternator shaft until decoupler pulley with freewheel can be removed.
Installing:
Install in the reverse order of removal, observing the following:
Modify the torque wrench -V.A.G 1332- as follows to fit decoupler pulley with freewheel:
Release socket drive -1- and pull off grip -2-.
Turn torque wrench grip -2- 180° and reinsert socket drive.
Set turning direction of torque wrench to anti-clockwise at socket drive.
First screw poly V-belt pulley with freewheel onto alternator shaft by hand to stop.
Insert multipoint adapter -T10474--1- into decoupler pulley with freewheel, and fit a ring spanner.
Insert suitable tool -2- into alternator shaft.
Turn alternator shaft anti-clockwise using torque wrench -V.A.G 1332--3- to tighten decoupler pulley with freewheel.
Tighten bolted connection to 80 N·m.
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