1991 MITSUBISHI 3000GT brake rotor

FRONT AXLE - Hub and Knuckle26-7MB990998-01MB990635-01
II
I1 lA0286 1
SERVICE POINTS OF REMOVALM2618AH
1. DISCONNECTION OF FRONT SPEED SENSORRemove the mounting bolts which hold the speed sensor
bracket to the knuckle, and then remove the speed sensor.
Caution
Be careful when handling the pole piece at the tip of the
speed sensor and the toothed edge of the rotor so asnot to damage them by striking against other parts.
3. REMOVAL OF DRIVE SHAFT NUT
Loosen the drive shaft nut while the vehicle is on the floor
with the brakes applied.
Caution
Do not apply vehicle load to the wheel bearing loosingthe drive shaft nut. If, however, vehicle load must be
applied to the bearing in moving the vehicle, temporari-
ly secure the wheel bearing by using the special tools,
MB990998-01, etc.
4. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with wires.
8. DISCONNECTION OF LOWER ARM BALL JOINT
Using the special tool, disconnect the lower arm ball joint
from the knuckle.
Caution1. Be sure to tie the cord of the special tool to the
nearby part.2. Loosen the nut but do not remove it.
IO. DISCONNECTION OF TIE ROD ENDUsing the special tool, disconnect the tie rod end from the
knuckle.
Caution
1. Be sure to tie the cord of the special tool to the
nearby part.2. Loosen the nut but do not remove it.
11. REMOVAL OF DRIVE SHAFTUse the special tool to push out the drive shaft from the
front hub.
14. REMOVAL OF HUBIn the case of AWD-vehicles with A.B.S., take care not to
damage the rotor for A.B.S. installed to the B.J. outer race
when removing the hub.
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27-4
REAR AXLE - Rear Axle Hub
REAR AXLE HUB
REMOVAL AND INSTALLATION
M27MA- -
50-60Nm36 - 43 ftlbs.
200-260Nm145-188ftibs.Removal steps
4*4*1. Rear speed sensor 2. Calioer assemblv3.Brakedisc4. Hubcap
l *5. Wheel bearing nut4’6. Tongued washer7. Rear hub assembly4*8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
Pole p&e14NOlO-7
SERVICE POINTS OF REMOVALM27MBAC
1.REMOVAL OF REAR SPEED SENSOR
Caution
Be careful when handling the pole piece at the tip of thespeed sensor and the toothed edge of the rotor so as
not to damage them by striking against other parts.
2. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with a piece of
wire.
8. REMOVAL OF REAR ROTOR
CautionCare must be taken not to scratch or scar the rotor’s
toothed surface, and not to drop it.
If the rotor’s toothed surface is chipped or the rotor is
deformed, it might not be able to accurately sense the
wheel rotation speed and the system as a result mightnot perform normally.
14NOO99ITSB Revision

I’REAR AXLE
- Axle Shaft
AXLE SHAFT
REMOVAL AND INSTALLATION27-15M27HA- -
i
/
i55-65 Nm
QO - 47 ftlbs.
Iq y 6
50-60Nm
36-4?R.‘bs-
12 Nm9 ft.lbs.
/
190 Nm137 ft.lbs.
260 - 300 Nm188-217ftlbs.
Removal steps
l *1. Rear speed sensora*2. Brake caliper assembly
3. Brake disc
4. Drive shaft mounting nut
+I) l *5. Self-locking nut
6. Washer
7. Companion flange
l *8. Axle shaft assembly+* l +9. Rear rotor

+* l + 10. Outer bearinga* l a 11. Dust shieldl a 12. Dust shield13. Axle shaftl * ** 14. Oil seall * I)+ 15. Inner bearing
/llN0021
llA0325 IllA026~
SERVICE POINTS OF REMOVALM27HBAQ
1.REMOVAL OF REAR SPEED SENSOR
Caution
Be cautious to ensure that the tip of the pole piece doesnot come in contact with other parts when removing
the speed sensor.2. REMOVAL OF BRAKE CALIPER ASSEMBLY
Remove the brake caliper assembly and suspend it with apiece of wire.
1 TSB Revision

REAR SUSPENSION - Rear Axle Hub
REAR AXLE HUB34-17
REMOVAL AND INSTALLATION
50-60Nm36 - 43 ftlbs.
1
Removal steps
*I)I, Rear speed sensor a*2. Caliper assembly
3. Brake disc
4. Hubcap
l +5. Wheel bearing nut
6. Tongued washer
7. Rear hub assembly
*I)8. Rear rotor 9. Rear hub unit bearing
Caution
Rear hub unit bearing cannot be disassembled.
llN0018
14NOlO14N009E
SERVICE POINTS OF REMOVALM34MBAC
1.REMOVAL OF REAR SPEED SENSOR ABS>Caution
Be careful when handling the pole piece at the tip of the
speed sensor and the toothed edge of the rotor so as
not to damage them by striking against other parts.
2. REMOVAL OF CALIPER ASSEMBLY
Remove the caliper assembly and suspend it with a piece of
wire.
8. REMOVAL OF REAR ROTOR ABS>Caution
Care must be taken not to scratch or scar the rotor’s
toothed surface, and not to drop it.
If the rotor’s toothed surface is chipped or the rotor is
deformed, it might not be able to accurately sense the
wheel rotation speed and the system as a result might
not perform normally.
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35-2SERVICE BRAKES - Specifications
SPECIFICATIONSrvKwx.- -
GENERAL SPECIFICATIONSItems
FWDAWD
Master cylinderTypeTandem type
(with level sensor)Tandem type
(with level sensor)
I.D. mm (in.)
25.4
(1) or 26.9 (1 %s)*26.9 (1 '/l6)Brake boosterTypeVacuum type, tandemVacuum type, tandem
Effective dia. of power cylinder
mm (in.)
180 (7.0) + 205 (8.0) or203 (8.0) + 230 (9.0)
203 (8.0) + 230 (9.0)”
Boosting ratio
6.0 [at 247 N (54
Ibs.)] or7.0
[Brake pedal depressing force]
7.0 [at 261 N (58 Ibs.)]”[at 261 N (58 Ibs.)]Proportioning valve
Split point
MPa (psi)3.75 - 4.25 (533 - 604)3.75 - 4.25 (533 - 604)
Decompression ratio
0.370.37
Front brakesTypeFloating caliper, 2-piston,Rigid caliper, 4-piston,
ventilated disc (M-R57W)ventilated disc
(M-R66Z)Disc effective dia.mm (in.)
227
(9.0)249 (9.8)Disc thickness
mm (in.)24
(.94)30 (1.18)
Pad thicknessmm (in.)
16 (.63)15 l.59)
Wheel cylinder I.D.mm (in.)
42.8(1"/16)X240.4(1'g/32)x2 +42.8(1"/16)~2
Clearance adjustment
AutomaticAutomatic
Rear brakesTypeFloating caliper, l-piston,
ventilated disc
(M-R45V)Floating caliper, 1 -piston,
ventilated disc (M-R58V)Disc effective dia.mm (in.)
228
(9.0)237 (9.4)Disc thicknessmm (in.)
18 (.71)20 (.79)Pad thickness
mm (in.)15.5
(.61)15.5 (.61)Wheel cylinder I.D.mm (in.)
34.9 (13/8)38.1 (1%)
Clearance adjustmentAutomaticAutomatic
Rotor teeth
Front wheel side
4747Rear wheel side
4747Speed sensor
Magnet coil typeMagnet coil type
NOTE*:ABS
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L
i
SERVICE BRAKES - Specifications
SERVICE SPECIFICATIONS
3msFWDAWD
andard value
Brake pedal heightmm (in.)
177 - 182 (7.0 - 7.2)
177 - 182 (7.0 - 7.2)Brake pedal free playmm (in.)
3-8(.1 -.3)3-8(.1 -.3)Brake pedal to floorboard clearance
mm (in.)
80 (3.1) or more
80 (3.1) or more
Pad thicknessmm (in.)
10.0 (.39)10.0 (.39)Front disc thickness
mm (in.)
24.0
t.94)30.0 (1.18)
Rear disc thickness
mm (in.)
18.0 (71)
20.0 (.79)Proportioning valve pressure
MPa (psi)
Split point
3.75 - 4.25 (533 - 604)3.75 - 4.25 (533 - 604)
Output pressure [input pressure]
5.23 - 5.73 (744 - 815)f8.0 (I, 138)]5.23 - 5.73 (744- 815)18.0 (1,138)]Booster
push;; (To,,;?aster cylinder piston
clearance
7
+ 8 inch brake booster
0.55 - 0.75 (.022 - ,030)-8 + 9 inch brake booster
0.65
- 0.85 (.026 - ,033)0.65 - 0.85 (026 - ,033)Disc brake drag force (tangential force of
wheel mounting bolts)
N (Ibs.)70 (15.4) or less
70 (15.4) or less
[Disc brake dragging torque[Nm (ft.lbs.)]
[4 (3) or less][4 (3) or less]
Speed sensor’s (ABS) internal resistance
kQFront
1.4-2.2
0.8 - 1.2
Rear1.3-2.1
0.8- 1.2
Rear speed sensor pole piece-to-rotor
tooth surface clearancemm (in.)
-28.15-28.45(1.11 -1.12)
Clearance between the
spmefm;l[yle piece
and the toothed rotor
Front0.3 - 0.9 (.012 - ,035)-
Rear0.2 - 0.7 (008 - .028)-nit
Left/right proportioning valve output
pressure difference
MPa (psi)0.4 (57)
0.4 (57)Front disc run-outmm (in.)
0.1
(.004) or less
0.1 (.004) or less
Pad thicknessmm (in.)
2.0
(08)2.0 (08)Front disc thicknessmm (in.)
22.4
(.88)28.4 (1.12)Front hub end playmm (in.)
0.05
(.002)0.05 (.002)Rear disc thicknessmm (in.)
16.4
(65)18.4 (.72)Rear disc run-outmm (in.)
0.08
(0031) or less
0.08 (.0031) or less
Rear hub end playmm (in.)
0.05
(002)0.8 (.031)
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SERVICE BRAKES - Special Tools / TroubleshootingTROUBLESHOOTING
MJSEAASSymptomProbable cause
Remedy
Vehicle pulls to oneGrease or oil on pad or lining surface
Replace
side when brakes are
appliedInadequate contact of pad
Correct
Auto adjuster malfunction
Adjust
Insufficient brakingLow or deteriorated brake fluidAdd or refill
power
Air in brakesystemBleed air
Overheated brake rotor due to dragging of padCorrect
Grease or oil on pad surfaceReplace
Inadequate contact of padCorrect
Brake booster malfunctionCorrect
Auto adjuster malfunctionAdjust
Clogged brake lineCorrect
Proportioning valve malfunctionReplace
Increased pedal strokeAir in brake systemBleed air
(Reduced pedal to
floorboard clearance)Worn padReplace
Broken vacuum hoseReplace
Brake fluid leaksCorrect
Excessive push rod to master cylinder clearanceAdjust
Faulty master cylinderReplace
Brake dragWorn brake pedal return springReplace
Insufficient push rod to master cylinder clearanceAdjust
Defective master cylinder piston return springReplace
Clogged master cylinder return portCorrect
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SERVICE BRAKES -Anti-lock Braking System Troubleshooting
L’
No.Trouble condition\4
After the ignition key is turned to the
“ON” position, it blinks once and then
illuminates when it is turned to the
“START” position. When the key is
returned to the “ON” position, the light
blinks again. (Blinking with the ignition
key in the “ON” position is synchronized
with operation noise of the valve relay.)
ABSwarninglight
key ACC. L::+
Ignition
14A05931 CONTINUED FROM PREVIOUS PAGE
1Major causes
l Break in harness for ECU warning
light drive circuit
l Malfunction of ECU
Does the ABS warning light illuminate
when starting to drive the car?
iIs there one-sided braking, insufficient
>CONTINUED ON NEXT PAGEI
I
YesTrouble condition
One-sided braking
Insufficient braking force
ABS sometimes functions even when
there is no sudden braking.
(ABSoperation vibration is transmitted.)Remedy
Check, using flow
P.35-19.)Remedy
l Check HU operation and, if
l necessary, replace HU.
If HU is normal, check struc-
l
HydraJicl Malfunction in HU solenoid valvetural parts for normal
braking.
Insufficient wheel speed sensor put voltage (sensor malfunction, too
large a gap between sensor rotor,
l Malfunction of ABS ECU(Refer to
P.35-57.) and, if
necessary, replace sensor,
If tests indicate that there are
no mechanical or electricalfaiIures,replace the ECU.
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