service MITSUBISHI 3000GT 1991 Service Manual

PROPELLER SHAFT - Propeller Shaft25-5
lOW504lOW505l Check the universal joints for smooth operation in all
directions.
l Check the center bearing for smooth movement.
lCheck the center bearing mounting rubber for damage or
deterioration.
Matlng marks10AOOl
j2
SERVICE POINTS OF INSTALLATION
3. INSTALLATION OF PROPELLER SHAFT
(I) Caution
M25GOAP
Be cautious to avoid damage to the oil seal lip of the
transfer.(2) Install the propeller shaft to the companion flange with
the mating marks properly aligned.
CautionTighten installation bolts after removing oil and
grease from threads to prevent them from loosen-ing due to lubrication.
2. INSTALLATION OF INSULATOR
Install spacers and insulators as indicated in the illustration.
Caution
When installing the center bearing, assemble the samespacers as removed from it (or new spacers of equal
thickness).
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PROPELLER SHAFT - Propeller Shaft25-7Mating marks
1ONOOOL
1 ON0003Mating marks
(commercially available)
\lOS520 'lOY507
SERVICE POINTS OF DISASSEMBLYM25GFAO
1. REMOVAL OF FRONT PROPELLER SHAFT ASSEMBLYPut mating marks on the front propeller shaft flange yoke
and the companion flange before removing the front
propeller shaft assembly.
3. REMOVAL OF COMPANION FLANGE
Put mating marks on the companion flange and the center
propeller shaft before removing the companion flange.
4. REMOVAL OF CENTER BEARING ASSEMBLY
First remove the center bearing bracket and then remove
the center bearing using a puller (commercially available).
5.REMOVAL OF CENTER PROPELLER SHAFT ASSEMBLYPut mating marks on the center propeller shaft, the Lobro
joint assembly and the companion flange before removing
the center propeller shaft assembly.
8. REMOVAL OF
LOBRO JOINT ASSEMBLY
(1) Remove the Lobro joint boot from the Lobro joint
assembly.
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PROPELLER SHAFT - Propeller Shaft25-9
L;Puller
[commercially available)
Companion flange
Rubber mountSelfnut-lockir
lON0007
e
lONO10X0018
15. REMOVAL OF CENTER BEARING ASSEMBLYFirst remove the center bearing bracket and then remove
the center bearing using a puller (commercially available).
INSPECTIONM25GIAAl Check the propeller shaft splines for wear or damage.
lCheck the ball grooves in inner or outer race for uneven
wear, damage or rust.
l Check ball surface for rust, wear or other damage.
l Check the cage for rust or damage.
SERVICE POINTS OF REASSEMBLYM25GHA.R
15. INSTALLATION OF CENTER BEARING ASSEMBLY
/ 14.COMPANION FLANGE
/ 13. SELF-LOCKING NUT
(1) Install the bearing in the rubber mount groove of the
center bearing bracket.
(2) Install the center bearing assembly to the rear propeller
shaft with its dust seal facing the companion flange
side.
(3) Install, lining up the mating marks on the companion
flange and the rear propeller shaft.
(4) While tightening the self-locking nut, install the center
bearing assembly with the companion flange.
10. INSTALLATION OF
LOBRO JOINT BOOT
Tape the serration of the center propeller shaft and then
install the Lobro joint boot.
8. INSTALLATION OF
LOBRO JOINT ASSEMBLY
Assemble the Lobro joint as follows:
(I) Apply a thin coat of the specified grease to the ball
grooves of the inner and outer races.
Specified grease: Repair kit
giease
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26-1
FRONT AXLE
CONTENTSM26AA- -i
DRIVE SHAFT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .._...........11SPECIFICATIONS _..._........................................... 2
HUB AND KNUCKLEGeneral Specifications....................................2............................................6Lubricants............................................................2i
SERVICE ADJUSTMENT PROCEDURES........5Service Specifications....................................2Hub End Play Inspection
................................5TROUBLESHOOTING........................................5
SPECIAL TOOLS . . . . . . . . . . . . . . .._.................. .: . . . . . . . . . . . .3I
iJI

26-2FRONT AXLE - Specifications
SERVICE SPECIFICATIONS
FWD
SPECIFICATIONS
GENERAL SPECIFICATIONS
Items
Wheel bearing
TypeDouble-row angular-contact
ball bearing
O.D. x I.D.mm (in.)
Drive shaft
Joint type
Outer
Inner
Lengthmm (in.)
L.H. shaft
R.H. shaft84 x 45 (3.31 x 1.77)
B.J.
T.J.
417 (I 6.4)
405 (15.9) or 393 (15.5)”
NOTE“1 M26CA-A
AWD
Unit ball bearing
B.J.
T.J.
419 (16.5)
391 (15.4)
M26CB-A
terns
standard value
Setting of T.J. boot length
mm (in.)
L.H.
R.H.
Limit
Hub end playmm (in.)
Wheel bearing starting torque(Hub starting torque) Nm (in.lbs.)
Specifications
85
f 3 (3.35 k .I 2)
85
+ 3 (3.35 +- .I 2)
0.05
(.002)
1.8 (16)
LUBRICANTSM26CO-A
Items
T.J. boot grease
B.J. boot grease


Dust seal inner
Dust seal outer
Specified lubricants
Repair kit grease
Repair kit grease
Multipurpose greaseQuantity
160 g (5.64 oz.)
145 g (5.11 oz.)
135 g (4.76 oz.)
14-2og (.49-.71 oz.)
8-12g(.28-.42oz.)
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FRONT AXLE - Troubleshooting / Service Adjustment Procedures
TROUBLESHOOTING
26-5
MPBEBAA
i.
Symptom
Vehicle pulls to one
side
Vibration
Shimmy
Excessive noiseProbable cause
Seizure of drive shaft ball joint
Abnormal wear, play or seizure of wheel bearing
Malfunction of front suspension or steering
Bend, damage or abnormal wear of drive shaft
Play in drive shaft and hub serration
Abnormal wear, play or seizure of wheel bearing
Improper wheel alignment
Malfunction of front suspension or steering
Broken boot, grease leakage
Bend, damage or abnormal wear of drive shaft
Play of drive shaft and hub serration
Abnormal wear, play or seizure of center bearing
Abnormal wear, play or seizure of wheel bearing
Loose wheel nut
Malfunction of front suspension and steering
Remedy
Replace
Replace
Adjust or replace
Replace
Replace
Replace
Adjust or replace
Adjust or replace
Replace, repack grease
Replace
Replace
Replace
Replace
Retighten
Adjust or replace
u11 A0285
SERVICE ADJUSTMENT PROCEDURES
HUB END PLAY INSPECTIONM26FAAE1. Jack up the vehicle and remove the front wheels.
2.Remove the disc brake caliper and suspend it with a wire.
(Refer to GROUP 35
- Service Adjustment Procedures.)
3.Attach a dial indicator as shown in the illustration, and then
measure the axial play while moving the hub back and forth.
Limit: 0.05 mm (.002 in.)
4.If axial play exceeds the limit, disassemble and check parts.
,
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i

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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26-8FRONT AXLE - Hub and KnuckleI
INSPECTIONM26lCAEl Check the hub for cracks and spline for wear.
l Check the oil seal for damage.
l Check the knuckle for cracks.
l Check for defective bearing.
L)
NOTE
If the meshing of the wheel bearing outer race and the
knuckle, or of the wheel bearing inner race and the hub, is
loose, replace the bearing or damaged parts.
llFO041:ter
pinMEASUREMENT OF FRONT HUB UNIT BEARING ROTA-
TION STARTING TORQUE(1) Set the special tool to the front hub unit bearing.
(2) Holding the special tool (bolt), tighten its nut to 200 to 260
Nm (145 to 188 ft.lbs.).
(3) Turn the hub to cause grease to distribute evenly over the
bearing.(4) Measure the rotation starting torque of the hub.
Limit: 1.8 Nm (16
in.lbs.) or less
SERVICE POINT OF INSTALLATIONM261OAG
3.INSTALLATION OF DRIVE SHAFT NUT / 2. COTTER PIN
(I) Be sure to install the washer and wheel bearing nut in
the specified direction.
(2) After installing the wheel, lower the vehicle to the
ground and finally tighten the wheel bearing nut.
(3) If the position of the cotter pin holes does not match,
tighten the nut up to 260 Nm (188
ft.lbs.1 in maximum.
(4) Install the cotter pin in the first matching holes and bend
it securely.
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FRONT AXLE - Hub and Knuckle26-9
DISASSEMBLY AND REASSEMBLY
n
Disassembly stepsI)+
1. Oil seal (drive shaft side)*I)2. Hub and rotorl 4Adjustment of wheel bearing starting torque
3. Hub4. Rotor
5. Dust shieldl *6. Oil seal (hub side)
7. Snap ring
*I) l *8. Wheel bearing
9. Knuckle
/9Nm7 ftlbs.
L
MSIE- .
bi\/b ilR0036
SERVICE POINTS OF DISASSEMBLYM26lFAP2. REMOVAL OF HUB AND ROTOR
(1) Attach the special tools to the knuckle and front hub.
(2) Secure the knuckle in a vise.
(3) Tighten the nut of the special tool and remove the hub
and rotor from the knuckle.
Caution1. Be sure to use the special tools.
2. If the hub and knuckle are disassembled by
striking them with a hammer, the bearing will
be damaged.8. REMOVAL OF WHEEL BEARING
(1) Crush the oil seal in two places to that the tabs of the
special tool will be caught on the wheel bearing inner
race.(2) Remove the wheel bearing inner race from the hub by
using the special tool.
CautionBe careful that the hub will not fall down as the
wheel bearing inner race (outer side) is removed
from the hub.
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26-10
FRONT AXLE - Hub and KnuckleMB990938-01MB990932-01
/
llR00401 MB991355llL0124
12A0545MB990998-01MB990998-01(3) Remove the snap ring from the knuckle.
(4) Remove the bearing by using the special tools.
NOTERemoval is easier if the outer side inner race removedLJfrom the hub is placed on the bearing and the wheel
bearing is then removed.
INSPECTIONM261GAC
lCheck the hub and brake disc mounting surfaces for galling
and contamination.
l Check the knuckle inner surface for galling and cracks.
l Check for defective bearing.
SERVICE POINTS OF REASSEMBLYMZBIHAO8. INSTALLATION OF WHEEL BEARING
(1) Fill the wheel bearing with multipurpose grease.
(2) Apply a thin coating of multipurpose grease to the
knuckle and bearing contact surfaces.
(3) With the wheel bearing inner race removed, press-in
the bearing by using the special tools.
(4) Install the wheel bearing inner race to the wheel
bearing.
6. INSTALLATION OF OIL SEAL (HUB SIDE)
(1) Drive the oil seal (hub side) into the knuckle by using the
special tools until it is flush with the knuckle end
surface.
(2) Apply multipurpose grease to the lip of the oil seal and
_to the surfaces ot the 011 seal which contact the hub.d. ADJUSTMENT OF WHEEL BEARING STARTING
TORQUE
(I) Use the special tool to mount the hub assembly onto
the knuckle.
(2) Tighten the nut of the special tool to 200
- 260 Nm .(I45
- 188 ft.lbs.).
(3) Rotate the hub assembly in order to seat the bearing.llKO12
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(4) Measure the wheel bearing starting torque (hub starting
torque) by using the special tools.
Limit: 1.8 Nm (16
in.lbs.) or less
NOTEThe starting torque must be within the limit and, in
addition, the bearing must not feel rough when rotated.