Piston (small)
FRONT DISC BRAKE
A face-to-face and different diameter 4-piston type made
from aluminium has been adopted for the front disc
brakes.
Not only is braking force well balanced with pressure
applied evenly over the entire pad surface but there is
also outstanding and stable braking performance
preventing uneven pad wear and providing a good
14F0029
braking feeling.
For safety, there is an audible wear indicator on the
inner side of the pad to warn when the limit of pad use
has been reached.
Clearance is automatically adjusted by pressing on the
brake pedal.
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DRIVE-CONTROL COMPONENTS - Service Brakes
Piston (large)
14F0030
Wear indicator
14F0041
DIFFERENT DIAMETER PISTONS
During braking, hydraulic pressure is generated in each
piston to press the pad against the rotor. Since there is a
lengthwise play between the pad and the caliper, the
pad is pressed against the trailing side caliper and a gap
is made on the leading side.
t this time, not only the piston surface pressure but
also the moment act on the leading side pad and wear
on the leading side pad is increased. Therefore, since
the leading side piston diameter is made small and the
surface pressure distribution is smaller than on the
tailing side, the pad acting force both on leading side
and trailing side is balanced for equal wear.
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