Page 929 of 1449
26-1
FRONT AXLE
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 3.................
LUBRICANTS 3..............................
SPECIAL TOOLS 3...........................ON-VEHICLE SERVICE 5.....................
Wheel Bearing Axial Play Check 5..............
Hub bolt replacement 5.........................
HUB AND KNUCKLE ASSEMBLY 6...........
DRIVE SHAFT 10............................
Page 930 of 1449

FRONT AXLE -General Information26-2
GENERAL INFORMATION
The front axle consists of front hubs, knuckles,
wheel bearings and drive shafts, and it has the
following features.
DThe wheel beearing is unit bearing integrated
with hub (Double-row angular contact ball
bearing).
DThe drive shaft incorporates B.J.-T.J. type
constant velocity joints with high transmission
efficiency and low vibration and noise.DABS rotors for detecting the wheel speeds are
press-fitted to the B.J. outer wheels in vehicles
with ABS or ACD.
NOTE
1. B.J.: Birfield Joint
2. T.J.: Tripod Joint
SPECIFICATIONS
ItemSpecifications
Wheel
bearingsWheel bearing typeHub unit bearing (Double-row angular
contact ball bearing)
g
Bearing (outside diameter) mm87*1
Drive
shaft
Joint typeOutsideB.J.
shaftInsideT.J.
Shaft length*2×Shaft diameter mmLeft350×26
Right427×26
NOTE
*1: The wheel beearing is integrated with hub, only the outer diameter is shown.
*2: The shaft length indicates the length between the center points of each joint.
STRUCTURAL DIAGRAM
B.J.T. J . KnuckleOutput shaft Strut assembly
Drive shaft
Wheel bearing Front hubT.J. (L.H.)
Output shaftT.J. (R.H.)
Page 931 of 1449

FRONT AXLE -Service Specifications/Lubricants/Special Tools26-3
SERVICE SPECIFICATIONS
ItemStandard valueLimit
Wheel bearing axial play mm-0.06
WheelbearingrotationstartingtorqueN·m-103orlessWheelbearing rotation startingtorqueN·m-1.03orless
Setting of T.J. boot length mm85±3-
Opening dimension of the
special tool (MB991561) mmWhen the B.J.boot band
(small) is crimped.2.9-
When the B.J.boot band
(big) is crimped.3.2-
Crimped width of the B.J.boot band mm2.4 - 2.8-
LUBRICANTS
ItemsSpecified lubricantsQuantity g
T.J. boot greaseRepair kit grease120±10
B.J.boot greaseRepair kit grease11 0±10
SPECIAL TOOLS
ToolNumberNameUse
MB990767End yoke holderFixing of the hub
MB991618Hub bolt removerRemoval of the hub bolt
MB991113 or
MB990635Steering linkage
pullerDisconnection of ball joint
A
B
MB990241
A: MB990242
B: MB990244Axle shaft puller
A: Puller shaft
B: Puller barDRemoval of the drive shaft
DRemoval of the hub
MB991354Puller bodyDRemoval of the drive shaft
DRemoval of the hub
Page 932 of 1449
FRONT AXLE -Special Tools26-4
Tool UseName Number
MB990685Torque wrenchMeasurement of wheel bearing rotation
starting torque
MB990326Preload socketMeasurement of wheel bearing rotation
starting torque
A
B
C
A: MB991017
B: MB990998
C: MB991000A,B: Front hub
remover and
installer
C: SpacerDProvisional holding of the wheel bearing
DMeasurement of wheel bearing rotation
starting torque
DMeasurement of wheel bearing axial play
MB991000, which belongs to MB990998,
should be used as a spacer.
MB991721Sliding hammerOutput shaft removal
MB991561Boot band clipping
toolResin boot band installation
MB990925
Brass bar
Installer adapterTool box
Bar (snap-in type) ACB
TypeTool numberO.D. mmTypeTool numberO.D. mm
MB99092639MB99093363.5
MB99092745MB99093467.5
MB99092849.5AMB99093571.5
AMB99092951MB99093675.5
MB99093054MB99093779
MB99093157BMB990938-
MB99093261CMB990939-
Page 933 of 1449
FRONT AXLE -On-vehicle Service26-5
ON-VEHICLE SERVICE
WHEEL BEARING AXIAL PLAY CHECK
1. Remove the disc brake caliper and suspend it with a
wire.
2. Remove the brake disc from the front hub.
3. Attach a dial gauge as shown in the illustration, and then
measure the axial play while moving the hub in the axial
direction.
Limit: 0.06 mm
4. If axial play exceeds the limit, replace the front hub
assembly.
HUB BOLT REPLACEMENT
1. Remove the caliper assembly and secure it with wire
so that it does not fall.
2. Remove the brake disc.
3. Use the special tools to remove the hub bolts.
4. Install the plain washer to the new hub bolt, and install
the bolt with a nut.
MB991618MB990767
Plain
washerMB990767
Page 934 of 1449

FRONT AXLE -Hub and Knuckle Assembly26-6
HUB AND KNUCKLE ASSEMBLY
REMOVAL AND INSTALLATION
Caution
If the vehicle is equipped with the Brembo disc brake, during maintenance, take care not to
contact the parts or tools to the caliper because the paint of caliper will be scratched. And if
there is brake fluid on the caliper, wipe out quickly.
Pre-removal and Post-installation Operation
DTransmission Fluid Draining
DTransfer Oil Draining (Refer to GROUP 22 –
On-vehicle Service.)Pre-removal and Post-installation Operation
DCheck the dust cover for cracks or damage by
pushing it with finger.
DTransfer Oil Filling (Refer to GROUP 22 –
On-vehicle Service.)
DTransmission Fluid Filling
25¶5N m
1
245¶29 N m
58
3
4
2
108¶10 N m
10
11
25¶6N m
6
9
100¶10 N m*1
108¶10 N m*2
167¶9N m
8.9¶1.9 N m
*1: Vehicles without BREMBO disc brake
*2: Vehicles with BREMBO disc brake
7
Removal steps
1. Front speed sensor
ACD or ABS>
AA"2. Caliper assembly
3. Brake disc
4. Split pin
AB""AA5. Castle nut
6. Dust shield7. Connection for lower arm ball joint
AC"8. Connection for tie rod end
AD"9. Drive shaft
10. Front strut to hub and knuckle
mounting bolt and nut
11. Hub and knuckle assembly
Page 935 of 1449

FRONT AXLE -Hub and Knuckle Assembly26-7
REMOVAL SERVICE POINTS
AA"CALIPER ASSEMBLY REMOVAL
Secure the removed caliper assembly with wire, etc.
Caution
If the vehicle is equipped with the Brembo disc brake,
during maintenance, take care not to contact the parts
or tools to the caliper because the paint of caliper will
be scratched. And if there is brake fluid on the caliper,
wipe out quickly.
AB"CASTLE NUT REMOVAL
Caution
Do not apply the vehicle weight to the wheel bearing
while loosening the castle nut. Otherwise wheel bearing
will be damaged.
AC"TIE ROD END DISCONNECTION
Caution
1. Loosen the nut only; do not remove it from the ball
joint. Otherwise ball joint thread will be damaged.
2. The special tool should be suspended by a cord to
prevent it from coming off.
AD"DRIVE SHAFT REMOVAL
1. Use the special tools to push out the drive shaft from
the hub.
2. Withdraw the drive shaft from the hub by pulling the bottom
of the brake disc towards you, and then remove the hub
retaining bolts.
MB990767
Nut
Cord
Ball joint
MB991113 or
MB990635
MB990242 MB990767MB991354
MB990244
(Three)
Page 936 of 1449

FRONT AXLE -Hub and Knuckle Assembly26-8
INSTALLATION SERVICE POINT
"AACASTLE NUT INSTALLATION
1. Be sure to install the castle nut washer in the specified
direction.
2. Using the special tool, tighten the castle nut.
Caution
Before securely tightening the castle nuts, make sure
there is no load on the wheel bearings. Otherwise
wheel bearing will be damaged.
INSPECTION
INSPECTION OF WHELL BEARING ROTATION STARTING
TORQUE
1. Tighten special tools in hub and knuckle assembly to
the specified torque.
2. Measure the wheel bearing rotation starting torque with
special tools.
Limit: 1.03 N·m or less
3. Wheel bearing rotation starting torque must be under
the limit value and there should be no roughness when
rotating the hub.
WHEEL BEARING AXLE PLAY CHECK
1. Secure knuckle in a vice to measure axle play in wheel
bearing.
Limit: 0.06 mm
2. If the limit value of wheel bearing axle plya cannot be
obtained when tightened to the specified torque (245
±29 N·m), check mounting bolt for hub and knuckle
assembly. If no defects are found, replace hub assembly.
MB990767
245±29 N·m
Washer
MB991000
(MB990998)
Bolt
245±29 N·m
Secure bolt and
tighten nut.
MB991017
MB990326
MB990685
MB991000
(MB990998)
245±29 N·m
Secure bolt and
tighten nut.
MB991017