1991 MITSUBISHI 3000GT Service Manual

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.)
1 TSB Revision

SPECIAL TOOLS
FRONT AXLE - Special Tools26-3M26DA-A
MB990998-01
Front hub remover
and installerRemoval or press-in the front hub
Measurement of front hub unit bearing
rotation starting torque
of the hub
M B990955-01Oil seal installer
MB990890-01
M B990883-01Rear suspension
TSB Revision

26-4FRONT AXLE - Special Tools
ToolNumberName
MB991 248 or
MD998801
Inner shaft remover
MB990925-01
Bearing and oil sealinstaller set
MB990938-0 1Handle
7Use
Removal of the inner shaft
Removal of wheel bearing
M 8990932-01M B990938-01
Removal and installation of center bearingMB990930-01MB990932-01M 8990938-01
MB990925-01Tool numberInstaller disc O.D. mm (in.:
I
MB990926-01MB990927-01MB990928-01M B990929-01MB990930-01MB990931-01MB990932-01MB990933-01MB990934-01MB990935-01MB990936-01MB990937-0139.0
(1.54)45.0(1.77)49.5(1.95)
51 .o(2.01)54.0(2.13)57.0(2.24)
61 .O(2.40)63.5(2.50)67.5(2.66)71.5(2.81)75.5(2.97)79.0(3.11)
TSB Revision

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.
,
1 TSB Revision1
i

26-6FRONT AXLE - Hub and Knuckle
HUB AND KNUCKLE
REMOVAL AND INSTALLATION
M261A- -
90
- 105 Nm
7 - 76 fubs.
T\
60-72Nm2001260 Nm
43 - 52 ft.‘bs.145 - 188 ftlbs.b
Ibs.UN002929Nm
200
- 260 Nm145- 188 ftlbs.llFO026
Removal steps
4*1. Front speed sensor connection
l *2. Cotter pin4* l +3. Drive shaft nut4*4. Caliper assembly5.Brake disc6. Front hub unit bearing7.Dust shield4*8. Lower arm ball joint connection
4*4*
4*
9.Cotterpin10. Tie rod end connection
11. Drive shaft
12. Front strut mounting bolt
13. Hub and knuckle14.Hub
NOTE*: Anti-lock braking system
TSB Revision1

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.
TSB Revision

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.
TSB RevisionII