lock MITSUBISHI 3000GT 1991 Service Manual

L.
SERVICE BRAKES -Service Adjustment Procedures35-53
I14A0398
14F003r
i14A04014NOO27
7
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.
TSB Revision

SERVICE BRAKES - Service Adjustment Procedures
4. Remove the following parts from caliper support.@ Outer shim@ Pad assembly@ Pad & wear indicator assembly@ Clip@ Inner shim A@ Inner shim B
d
14N0031
f\
/0014N013714A040;14N003:
14AO401
l%FLision
14N01365. Measure hub torque with pad removed to measure brake
drag torque after pad installation.
On vehicles with VCU-equipped LSD, disengage the drive
shaft and companion flange.
NOTESecure the disc to the hub with wheel nuts.
6. Securely attach the pad clip to the caliper support.
Caution
Do not deposit
&ease or other dirt on pad or brake disc
friction surfaces.
7.Clean the piston and then push the piston into the cylinder.
8.With care not to allow the piston boot to be wedged, lower
the caliper assembly and fit the lock pin.
9. Check brake drag torque as follows.
(I) Start engine and hold brake pedal down for 5 seconds.
[Approx. 200 N (44
Ibs.)](2) Stop engine.
(3) Turn brake disc forward
10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torque
exceeds the standard value, disassemble piston and clean
piston. Check for corrosion or worn piston seal, andcheck
the sliding condition of the lock pin sleeve and guide
pinl/jsleeve.
Standard value: 70 N (15.4
Ibs,,) [4 Nm (3 ft.lbs.)] or less

SERVICE BRAKES- Service Adiustment Procedures35-59
iPressure decrease
Release
pjgKq LockDrag force when
pedal is releasedMUT actuator
itest start
3 sec.
I3 sec.
Pedal operation
Pedal operation
pattern @
pattern @
JJ.r__---------------
I
I
I
I----------
------------------4
I1r-’ - - - - - - - - - a -I6 sec.
1------ __---____-__ - --___-__--_ ---J’-
14FOO96(7) If any abnormality is found in the check, take corrective
action according to the following “Judgement in Inspection
by Feel” table.
Judgement in Inspection by Feel
No.
I IMUT display
04FR VALVE
M
05FL VALVEM
t
106”
I IRear VALVEM”Operation
(1) Depress brake pedal to
lock wheel.
(2) Using the MUT. select
the wheel to be checked
and force the actu-
ator to operate.
(3)Turn the selected wheel
manually to check the
change of brake force.
1-1 ‘gkte / Remedy
Normal
Brake force
released for 6
seconds after
locking.Wheel doesClogged brake Check and
not lock when
line other than clean brake
brake pedal HUline
is depressed.
Clogged
hy-Replace HU
draulic circuit assembly
in HUBrake force is
Incorrect HUConnect
not releasedbrake tubecorrectly
connection
HU solenoid
valve not
functioning
correctlyReplace HU
assembly
NOTE*: FWD
TSB Revision

35-60SERVICE BRAKES - Service Adjustment Procedures
INSPECTION BY USING BRAKE FORCE TESTER
NOTE
(1) The brake force tester roller and tire must be dry during the
test.
(2) When testing the front brakes, apply the parking brake and
when testing the rear brakes, apply chocks to the front
wheels to lock them.
(I) Place the front or rear wheels on the brake force tester
roller.(2) Set the MUT through the adapter harness
(MB9913771 as
illustrated.
(3) After confirming that the shift lever or selector lever is in
the neutral position, start the engine.
(The ABS warning light lights up, it goes into the
-MUTmode. In the MUT mode, ABS does not function.)
(4) Operate the brake force tester roller.
(5) Depress the brake pedal until the brake force tester
indicates the following value and keep the brake force at
this level during the test.
Front wheels: 1,000 N (220
Ibs.)Rear wheels: 650 N (143
Ibs.)(6) Allow the brake tester indication to stabilize before operat-
ing the MUT to perform actuator test (Item No. 01,
02, 03).
Then, read change of tester indication.
Referring to the following “Judgement in Inspection by
Using Brake Force Tester” table, judge and take corrective
action if necessary.
NOTEWhile the ABS is in the fail safe mode, the MUT actuator
test cannot be made.
1 TSB Revision

When energized
Between terminals 4 and 5Continuity
When de-energized
Between terminals 4 and 5\i fl \\ 16FO264No continuity
Between terminals 1 and 3Continuity
16FO122L--J18FOCII
SERVICE BRAKES - Service Adjustment ProceduresI
INSPECTION OF POWER RELAYM35FOAP
7
1.Remove the relay box cover in the engine compartment and
remove the power relay.
2. Apply the battery voltage to the terminal @ and check for
‘L-J1
continuity between the following terminals when the
terminal @ is short-circuited to ground.
35-62
14FOOS14FOO8
l-TSB
1
REMEDY IN CASE OF DISCHARGED BATTERY
M35FOAQIf the engine is jump-started, because of a completely
discharged battery, the vehicle may suffer misfiring and fail to
start if an attempt is made to start without allowing the battery
to recover sufficiently. This is because the ABS consumes a
great deal of current for its self check. In such a case, allow the
battery to sufficiently charge or remove the ABS power relay in
the engine compartment to disable the ABS. Removing the
ABS causes the ABS warning light to light. After the battery is
charged sufficiently, install the power relay and restart the
engine to check that the ABS warning light goes out.
INSPECTION OF VALVE RELAY AND MOTOR
RELAY (ABS)M35FOAR1. Remove the splash shield
(FR) and remove the relay box
cover by inserting a screwdriver between the hydraulic unit
and cover to pry off the lock.
2.Remove the relays. The one closest to you (larger one) is
the motor relay and the one farthest from you (smaller one)
is the valve relay.
‘d~ i
wision

SERVICE BRAKES - Brake Pedal35-65
‘Ii14 Nm
i3Nmy9 ftlbs.
6
h 14FOlO8. .22ttJbs.
--2
-.113Nm14 Nm
9 ft.lbs.
10 klbs.
Stop light switch removal steps1. Stop light switch connector
2. Stop light switch
Brake pedal removal steps
l *3. Return spring
4. Cotter pin
5. Washer\12 Nlm9 ftllbs.6. Clevis pin
7. Cotter pin
8. Shift lock cable connection
9. Brake pedal assembly (parts from step
10 to
step 21)
/’/’10.
11.
12.13.
14.
15.
16.
17.
18.
19.
21.Brake pedal shaft bolt
Lever assembly installation nut
Lever assembly
Brake assembly
Bushing
Spacer
Cotter pin
Link assembly
Lever assemblyBushinq
Brake pedal support member
/
14FO107
TSB Revision

SERVICE BRAKES - Front Disc Brake35-75
SASSEMBLY AND REASSEMBLYM35LE-A

Caliper assembly disassembly steps
1)* 1. Guide pin
l 2. Lock pin
3. Bushing
4. Caliper support (pad. clip, shim)
5. Pin boot
6. Boot ring
7. Piston boot
8. Piston
9. Piston sealIO. Caliper body
a*l *
l *
Pad assembly disassembly steps
I)+ I. Guide pinw 2. Lock pin
3. Bushing
4. Caliper support
(pad, clip, shim)
1 I. Pad &wear indicator
12. Pad assembly
13. Outer shim
14. Clip
75 Nm54 ftlbs.
Brake caliper kit
TSB Revision

SERVICE BRAKES - Front Disc Brake
ldenti
ficationSERVICE POINTS OF REASSEMBLYM35LHCC2. INSTALLATION OF LOCK PIN
/ 1. GUIDE PINIInstall the guide pin and lock pin mating the head markings
‘I ~
on the guide and lock pins with the identification markings
LJ i
on the caliper body.
I
1 TSB Revision1

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.
TSB Revision

35-82SERVICE BRAKES - Rear Disc Brake
USASSEMBLY AND REASSEMBLYM35NA- -
44Nm
32 ft.lbs.Caliper assembly disassembly steps
l *1. Lock pinl *2. Guide pin3.Bushing
4.Caliper support
(pad, clip, shim)
5.Pin boot9.Boot ringl *10. Piston boot4*11.Pistona*12. Piston seal13.Caliper bodyPad assembly disassembly steps
*+ 1. Lock pinl *2. Guide pin
3. Bushing
4. Caliper support
(pad, clip, shim)14. Pad and wear indicator
assembly
17. Pad assembly
18. Outer shim
19. Clip
,1814NOl58
Brake caliper kit
Pad kit
Seal and boot kit14N0160
TSB Revision