1991 MITSUBISHI 3000GT brake pads

35-52SERVICE BRAKES - Service Adjustment Procedures
14FOO94
k.!! I14FOO427. Using the following procedure, check the brake drag
torque.@ Start the engine and depress and hold the brake pedal
’for five seconds. [Approx. 200 N (44
Ibs.)]@ Stop the engine.@ Rotate the brake disc ten turns in the forward direction.@ Using a spring balance, check the brake drag force.
8. If the difference between the brake drag force and hub
rotating force exceeds the standard value, disassemble the
piston and check the piston sliding surfaces for dirt and
rust, piston seal for deterioration, and lock pin and guide pin
for sliding motion.
Standard value: 70 N (15.4
Ibs.) [4 Nm (3 ft.lbs.)] or less
INSPECTION OF FRONT BRAKE DISC THICKNESS1. Remove dirt and rust off the surface of the brake disc.
2.Measure the thickness of disc at four or more places of the
pad contacting surface.
Standard value:
24.0 mm (.94 in.)
30.0 mm (1.18 in.)
,Limit:
22.4 mm (.88 in.)
28.4 mm (1.12 in.)
3.If the wear exceeds the limit even at one place, replace the
right and left discs and brake pads as a set.
FRONT BRAKE DISC RUN-OUT CHECKM35FSAF
1. Remove the front brake assembly; and support it with a
wire, etc.
TSB Revision2. Place a dial gauge approximately 5 mm
(.2 in.) from the
outer circumference of the brake disc, and measure the
run-out of the disc.
Limit: 0.10 mm (.004 in.) or less
NOTESecure the disc to the hub with wheel nuts.

L.
SERVICE BRAKES -Service Adjustment Procedures35-53
I14A0398
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FRONT BRAKE DISC RUN-OUT CORRECTION
M35FFAC
1.If the run-out of the brake’disc is equivalent to or exceeds
the limit specification, change the phase of the disc and
hub, and then measure the run-out again.
(1) Before removing the brake disc, chalk both sides of the
wheel stud on the side at which run-out is greatest.
(2) Remove the brake disc, and then place a dial gauge as
shown in the illustration; then move the hub in the axial
direction and measure the play.
Limit: 0.05 mm (.002 in.)
If the play is equivalent to or exceeds the limit, replace
the front hub unit bearing.
(3) If the play does not exceed the limit specification, and
then check the run-out of the brake disc once again.
Mount the brake disc on the position dislocated from
the chalk mark.
2.If the run-out cannot be corrected by changing the phase of
the brake disc, replace the disc.
REAR DISC BRAKE PAD CHECK AND REPLACE-
MENTM35FUAE
1.Check brake pad thickness through caliper body check port.
Standard value: 10.0 mm
(39 in.)
Limit: 2.0 mm
(08 in.)
Caution
1.When the limit is exceeded, replace the pads at both
sides, and also the brake pads for the wheels on the
opposite side at the same time.
2.If there is a significant difference in the thicknesses
of the pads on the left and right sides, check the
sliding condition of the piston, lock pin sleeve and
guide pin sleeve.
2. Loosen the parking brake cable (from the vehicle interior),
and disconnect the parking brake end installed on the rear
brake assembly.
3. Remove lock pin. Lift caliper assembly and retain with
wires.
Caution
Do not smear special grease on lock pin or make it
dirty.
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SERVICE BRAKES - Front Disc Brake35-77
14AO553
14AO55114uoo7i
SERVICE POINTS OF DISASSEMBLYM35LFCB
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 inher cylinder with trichloro-
ethylene, alcohol or specified brake fluid.
Specified brake fluid: Conforming to DOT3
INSPECTIONMOBLGCBl 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 (.39 in.)
Limit value: 2.0 mm
(08 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.
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35-80SERVICE BRAKES - Front Disc Brake14FOOl14FOO4
14FOO2:
SERVICE POINTS OF DISASSEMBLYM35LFCC2. REMOVAL OF PAD PIN
Holding the cross spring with hand, remove the pad pin.
4. REMOVAL OF PAD ASSEMBLY
Using a screwdriver, remove the pad assembly.
11. REMOVAL OF PISTONSInstall a wood block as shown and send compressed air
through the port, to which brake hose is attached, to
remove the pistons.
At this time, make sure that the four pistons come out
evenly.
Caution
1. Be careful not to get your fingers to be pinched.
2. Use care not to let the brake fluid splash.
‘d
12. REMOVAL OF PISTON SEAL
(1) Remove the piston seal.
CautionDo not damage the cylinder inner surface.
(2) Clean the piston surfaces and cylinder inner surfaces
with trichloroethylene, alcohol, or the specified brake
fluid.
Specified brake fluid: Conforming to DOT3
INSPECTIONMJSLGCCINSPECTION OF PAD WEAR
Measure the thickness of the pad at a point which wears most.
Replace the pad assembly if the measurement is less than the
limit.
Standard value: 10.0 mm
(.39 in.)
Limit: 2.0 mm
(.08 in.)
CautionI/’Whenever the pad is to be replaced, replace the pads on
the right and left wheels as a set.
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SERVICE BRAKES - Rear Disc Brake35-85
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SERVICE POINTS OF DISASSEMBLYM35NBAF10. REMOVAL OF PISTON BOOT
/ 11. PISTON
Protect caliper body with cloth. Blow compressed air
through brake hose to remove piston boot and piston.
CautionBlow compressed air gently.
12. REMOVAL OF PISTON SEAL
(I) Remove piston seal with finger tip.
CautionDo not damage the cylinder inner surface.
(2) Clean piston surface and inner cylinder with trichloro-
ethylene, alcohol or specified brake fluid.
Specified brake fluid: Conforming to DOT3
INSPECTIONM35NCAOl 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.
l Check wear indicator for damage.
PAD WEAR CHECKMeasure the thickness at the thinnest worn area of the pad.
Replace pad assembly when pad thickness is less than the limit
value.
Standard value: 10.0 mm
(39 in.)
Limit: 2.0 mm
(.08 in.)
Caution
1.Whenever the pad is to be replaced, replace the pads onthe 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.
Identification
mark “G”
ldentmark
SERVICE POINTS OF REASSEMBLYM35NOAI2. INSTALLATION OF GUIDE PIN
/ 1. LOCK PIN
Install the guide pin and lock pin mating the head markings
on the guide and lock pins with the identification markings
on the caliper body.
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