Beta RR 4T - 525 - Page 73

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Manuale di Officina RR 4T - 250 - 400 - 450 - 525
Automatic stretcher
– Fully extract the automatic stretcher pressure pin and check
that it can slide freely.
– Check the wear of the pressure pin teeth and the dog.
– When refitting, push the dog in the direction indicated by the
arrow so that the pressure pin no longer jams and then fully
insert the pressure pin into the stretcher body.
1
3
4
2
Valve gear control
Thoroughly clean all the components and check them for wear.
Timing pinion 1
Check the teeth for nicks or signs of wear.
Chain stretcher shoe 2
Check for signs of sliding on the contact surface.
Chain guide 3
Check for signs of sliding on the contact surfaces.
Chain coupling 4
Replace the open link of the timing chain.
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