Suzuki GZ250 Marauder Service Manual page 29

2-13 PERIODIC MAINTENANCE
FRONT BRAKE PADS
The extent of brake pad wear can be checked by observing
the limit line
limit line, replace the pads with new ones. (See p. 5-8.)
A CAUTION
Replace the brake pad as a set, otherwise braking
performance will be adversely affected.
AIR BLEEDING THE BRAKE FLUID CIRCUIT
Air trapped in the brake fluid circuit acts like a cushion to
absorb a large proportion of the pressure developed by the
master cylinder and thus interferes with the full braking per-
formance of the brake caliper. The presence of air is indi-
cated by "sponginess" of the brake lever and also by lack
of braking force. Considering the danger to which such
trapped air exposes the machine and rider, it is essential
that, after remounting the brake and restoring the brake
system to the normal condition, the brake fluid circuit be
purged of air in the following manner:
• Fill the master cylinder reservoir to top of the inspection
window. Replace the reservoir cap to prevent dirt from
entering.
• Attach a hose to the air bleeder valve, and insert the free
end of the hose into a receptacle.
• Bleed air from the brake system.
• Squeeze and release the brake lever several times in
rapid succession and squeeze the lever fully without re-
leasing it. Loosen the bleeder valve by turning it a quar-
ter of a turn so that the brake fluid runs into the recep-
tacle, this will remove the tension of the brake lever
causing it to touch the handlebar grip. Then, close the air
bleeder valve, pump and squeeze the brake lever, and
open the valve. Repeat this process until the fluid flowing
into the receptacle no longer contains air bubbles.
NOTE:
While bleeding the brake system, replenish the brake fluid
in the reservoir as necessary. Make sure that there is al-
ways some fluid visible in the reservoir.
• Close the air bleeder valve, and disconnect the hose. Fill
the reservoir with brake fluid to the top of the inspection
window.
Air bleeder valve: 7.5 N ■ m (0.75 kg-m, 5.5 Ib-ft)
A CAUTION
Handle brake fluid with care: the fluid reacts
chemically with paint, plastics, rubber materials,
etc.
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on the pad. When the wear exceeds the
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