Checking the operation of the free wheel
– Fit free wheel gear 1 on free wheel device 2.
– The free wheel gear should rotate clockwise.
– Attempting to rotate the free wheel gear anticlockwise should
lock the gear with no idle travel.
Replacing the free wheel hub
– Squeeze expansion ring 3 with a pair of Seeger pliers and re-
move it together with free wheel 2.
– Remove the six screws 4.
– Using a plastic mallet, hit hub 5 laterally to detach it from the
primary gear.
– Fit a new free wheel hub on the primary gear.
– Degrease the screw threads, apply Loctite 648 to them and ti-
ghten the screws to 16 N·m following a crosswise pattern.
– Carefully oil free wheel 2 and insert it into hub 5.
– Using a pair of Seeger ring pliers, insert the expansion ring in-
to the groove and ensure that it is properly seated. Once the
expansion ring is in place, we recommend hitting it carefully
with a punch.
NOTE: “Notches” A on the expansion ring should mesh with the
free wheel hub slot.
52
Manuale di Officina RR 4T - 400 - 450 - 525
1
2
3
A2
4
5
2
5
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