A. Dust Seal
B. Primary Cup
C. Secondary Cup
-Check that the spring is not damaged and is not shorter
than the service limit.
B. Free Length
Master Cylinder Parts (Front and Rear)
Cylinder Inside Diameter
Piston Outside Diameter
Primary Cup Diameter
Secondary Cup Diameter
Spring Free Length
eCheck the dust seal at the piston and diaphragm at
the reservoir cap for tear or other damage. Replace
them if they are damaged.
eCheck the diaphragm under the master cylinder cap.
If there is any tear or other damage, replace the dia-
Caliper parts wear
Inspect the pads for wear. For the front disc brake(s),
check the thickness of the pad linings, and replace both
pads as a set if the thickness of either pad is less than
the service limit.
For the rear disc
if either pad is worn down
through the stepped portion, replace both pads as a set.
If any grease or oil spills on the pads, wash it off with
trichloroethylene or a high flash-point solvent. Do not
use one which will leave an oily residue. If the oil cannot
be thoroughly clean off, replace the
Pad Usable Range
The fluid seal around the piston maintains the prop-
If this seal is not satisfactory,
pad wear will increase, and constant pad drag on the
disc will raise brake and brake fluid temperature.