Mitsubishi 3000GT 1991, Service Manual

Page: 799 / 1146

SERVICE BRAKES Front Disc Brake
SERVICE POINTS OF DISASSEMBLY
When disassembling the front disc brakes, disassemble both
sides (left and right) as a set.
7. REMOVAL OF PISTON BOOT 8. PISTON
Send compressed air from the port to which brake hose is
installed and remove the pistons and piston boots.
Caution
Send the air gradually, and using the handle of a plastic
hammer etc., keep the protrusions of the two pistons
even.
If one of the two pistons is removed, the other one
cannot be removed.
9. REMOVAL OF PISTON SEAL
(1) Remove piston seal with finger tip.
Caution
Do not damage the cylinder inner surface.
(2) Clean piston surface and cylinder with
ethylene, alcohol or specified brake fluid.
Specified brake fluid: Conforming to DOT3
INSPECTION
l
Check cylinder for wear, damage or rust.
l
Check piston surface for wear, damage or rust.
l
Check caliper body or sleeve for wear.
l
Check pad for damage or adhesion of grease, check
backing metal for damage.
PAD WEAR CHECK
Measure thickness at the thinnest and worn area of the pad.
Replace pad assembly, when pad thickness is less than the limit
value.
Standard value: 10.0 mm in.)
Limit value: mm in.)
Caution
1. Whenever the pad is to be replaced, replace the pads on
both right and left wheels as a set.
2. If there is a large difference in thickness between the
pads on the right and left wheels, check the sliding
portions of the caliper.
TSB Revision