Mash Seventy - Page 31

Chapter 2
Periodic maintenance
Section 2 Maintenance and adjustment
2
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13
Release the open valve C and continue to operate the
rear brake pedal until the old brake fluid is fully discharged
from the rear brake sub-pump.Close vent valve C and
disconnect hose.Then release the valve B and continue to
operate the rear brake pedal again until the old brake fluid
is fully discharged from the front brake sub-pump.Close
vent valve B and disconnect hose.As fig. 2.2.36
Fill the reservoir with new brake fluid within the mark
mark of the oil cup.As fig. 5.2.37
Rear caliper exhaust valve :7.5N∙m (7.5kg∙m)
Exhaust of brake fluid circuit
When air is drawn into the brake fluid loop, acting as a
cushion, it can absorb most of the compression force
generated by the main cylinder, resulting in interference
with the braking performance of the brake calipers.
If the brake rod has a spongy feeling and braking is not
effective, there is air.
In view of the presence of air will put the vehicle and the
driver in a dangerous state, so after the brake is installed
and the brake system is restored to normal condition, it is
important to release the air remaining in the brake fluid
loop in the following way:
Exhaust of front brake fluid circuit:
Fill the storage box of the front brake cylinder to the top
of the inspection window and replace the cover to prevent
dust from entering.Connect the hose to vent valve A and
insert the free end of the hose into the container.As fig.
2.2.38. Squeeze and release the brake lever several times
continuously, and then squeeze the lever sufficiently, but do
not release it.Turn the vent valve 1/4 turn to relax to allow
the brake fluid to flow into the container.This removes
tension from the brake lever and puts it in contact with the
throttle handle.Unscrew the vent valve, squeeze the brake
lever and open the vent valve again, and repeat the process
until the liquid flows into the container without bubbles.As
fig. 2.2.39. Close vent valve and drain hose.Fill the brake
fluid to within the calibration line of the oil cup.
Exhaust of rear brake fluid circuit:
Fill the tank of the rear brake cylinder to the top of the
Inspect window and then reinstall the cover to prevent dust
from entering.
Connect the hose to vent valve C and insert the free end
of the hose into the container.As fig. 2.2.40.
Fig.2.2.36
Fig.2.2.37
Fig.2.2.38
Fig.2.2.39
Fig.2.2.40