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6.9 Brake adjustment
The parking brake is a very important piece of equipment that
requires careful adjustment to ensure it functions correctly.
The position of the brake is strictly related to the rear wheel and
there are four parameters to check during adjustment: brake
position, brake support position, inclination and position of the
braking bar.
.
Brake and support position
Fig. 71
The brake position is strictly related to the position of the rear wheel
(see chapter 6.4 "Rear wheel adjustment"). A good combination
between the support "S" along the frame and the brake rod "T" on
the same support.
Such position should allow the brake to be correctly adjusted (see
"position and inclination of the braking bar").
The support "S" is usually fixed in the middle of the brake rod "T"
(see figures 71 and 72).
To perform this adjustment, remove the rear (see chapter 5.5
"Quick release rear wheels"), loosen the bolt on the support "S"
(6mm Allen Key), move the brake to the correct position, screw the
Fig. 72
bolt just enough to keep the brake in place (this bolt has to be
tightened after adjusting the position of braking bar).
Position and inclination of the braking bar
The
rotation
of
the
support
"S"
and
consequently
of
the
angle "a°", does not have
a set value, but it should
be adjusted so as the
braking bar "P" is always
parallel to the ground
and
as
outwardly
positioned as to cover
the entire width of the
tyre (see figure 74).
This adjustment has to
be carried out with the
wheel on and with the
brake disengaged.
To adjust the position of the braking bar, rotate both the support "S"
and the brake rod "T" until the correct position (see figure 63) (while
performing this operation, the bolt on the support has to be loose,
otherwise the parts can not rotate).
Then, adjust the braking bar "P" at approximately 0.5cm (distance
"D") from the tyre (0.6 cm with solid tyre) (see figure 75).
Once the correct adjustment is made, remove the rear wheel to get
easier access to the bolt on the support "S". Fix the bolt hard and
put the wheel on.
Fig. 74
Fig. 75
EXELLE
37
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