Movable driving half-pulley bushing: Maxi-
mum allowable diameter
Ø 26.12 mm
Sliding bushing: Standard Diameter
Ø 25.959 ÷ 25.98 mm
Sliding bushing: Minimum admissible diame-
ter
Ø 25.95 mm
Roller: Standard Diameter
Diameter 20.5 - 20.7 mm
Roller: Minimum diameter permitted
Ø 20 mm
Refitting the driving pulley
- Fit the steel shim in contact with the bushing and
the stationary drive pulley.
- Install the appropriate tool as described in the re-
moval phase.
-Tighten the nut with washer to the prescribed tor-
que.
Specific tooling
020626Y Driving pulley lock wrench
Locking torques (N*m)
Drive pulley nut 75 ÷ 83
Engine MSS X9 Evolution 250
ENG - 94
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