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MAINTENANCE WORK ON CHASSIS AND ENGINE »
Changing the basic position of the foot brake pedal *
The basic position of the foot brake pedal can be altered by turning the stop
screw [1]. The free play at the foot brake pedal must then be adjusted by
means of the piston rod [2].
Measured on the outside, the foot brake pedal must have 3-5 mm (0.12–0.20
in) of free play before the piston rod can move the piston in the brake cylinder
(to be recognised from the resistance on the foot brake pedal).
If this free play is not present, then pressure can build up in the brake system
when driving, causing the rear wheel to brake. The braking system overheats
and may even fail completely in extreme cases.
Checking the rear brake pads
The brake pads can be inspected from the rear. The thickness of the linings
may not be less than 1 mm (0.04 in).
At their most worn point brake pad linings should not be thinner than 1 mm,
otherwise they could lead to brake failure. For your own safety don’t put off
having your brake pads changed.
If the brake pads are replaced too late so that the lining is partly or entirely
worn, the steel components of the brake pad will rub against the brake disc,
thereby imparing the braking effect and destroying the brake disc.
Replacing the rear brake pads *
Push the brake caliper [3] toward the chain wheel in order to move the brake
piston into its basic position. Remove the clips [4], pull out the bolt [5], and
remove the brake pads. Thoroughly clean the brake caliper with compressed
air and check the sleeves of the guide bolts for damage.
Insert the left brake pad into the brake caliper and secure it with the bolt.
Insert the right brake pad and push the bolt [5] into the brake caliper up to
the stop. Reattach clips [4].
– It is very important to keep the brake disk free from oil and fatty matters.
Otherwise, the braking effect would be strongly reduced.
– After assembly, check if clips have been fitted correctly.
– After working on the braking system, always actuate the hand brake lever
or foot brake lever, respectively to ensure that the brake pads will lie against
the brake disk and the pressure point is established.
3-5mm
min.
1 mm
1
2
3
4
4
5