Mitsubishi EVO VIII 260 Service Manual

GROUP 26

FRONT AXLE

CONTENTS

26-1

GENERAL INFORMATION . . . . . . . . 26-2

SERVICE SPECIFICATIONS. . . . . . . 26-3

LUBRICANTS . . . . . . . . . . . . . . . . . . 26-3

SPECIAL TOOLS. . . . . . . . . . . . . . . . 26-3

ON-VEHICLE SERVICE. . . . . . . . . . . 26-6

WHEEL BEARING AXIAL PLAY CHECK . . 26-6

HUB BOLT REPLACEMENT . . . . . . . . . . . 26-6

FRONT AXLE HUB ASSEMBLY . . . . 26-7

REMOVAL AND INSTALLATION . . . . . . . . 26-7

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-9

DISASSEMBLY AND REASSEMBLY . . . . . 26-10

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-10

DRIVE SHAFT ASSEMBLY . . . . . . . . 26-12

REMOVAL AND INSTALLATION . . . . . . . . 26-12

DISASSEMBLY AND REASSEMBLY . . . . . 26-15

INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . 26-18

EBJ BOOT (RESIN BOOT)

REPLACEMENT . . . . . . . . . . . . . . . . . . . . . 26-18

26-2

FRONT AXLE

GENERAL INFORMATION

GENERAL INFORMATION

M1261000100444

The front axle consists of front wheel hub assembly,
knuckles and drive shafts, and has the following
features:

• The wheel bearing incorporates a unit ball
bearing (double-row angular contact ball bearing)
for reduced friction.

• The front wheel hub assembly combines the hub,
wheel bearing, housing, and oil seal in a single
unit for fewer parts, better rigidity, improved
assembly precision, and better structural
organization.

• The drive shaft on wheel side incorporates an
EBJ type constant velocity joint.

SPECIFICATIONS

Item Specification

Wheel bearing Type Unit ball bearing (Double-row

• The drive shaft on the differential side
incorporates a TJ type constant velocity joint.

• ABS rotor for detecting the wheel speed is
press-fitted to the EBJ.

• For environmental protection, a lead-free grease
is used on the joints.

NOTE: .

• EBJ: Eight Ball Fixed Joint; The use of the
smaller-sized eight balls inside the joint achieves
weight saving and compact size compared with a
BJ (Birfield Joint).

• TJ: Tripod Joint

angular contact ball bearing)

Driveshaft Joint type Outer EBJ

Inner TJ

Length (joint to joint) ×
diameter mm

Left 352.5 × 26

Right 429.5 × 26

NOTE: The wheel bearing is part of the hub,
therefore its size is not listed here.

CONSTRUCTION DIAGRAM

Strut assembly

Output shaft

TJ (LH)

Knuckle

Front wheel
hub assembly

Drive shaft
(LH)

EBJ

Output shaft

TJ (RH)

Drive shaft
(RH)

ABS rotor

Wheel bearing

AC211166

AB

FRONT AXLE

B990767

MB991618

AC106827

SERVICE SPECIFICATIONS

SERVICE SPECIFICATIONS

Item Standard value Limit

Wheel bearing axial play mm − 0.05

Wheel bearing rotation starting torque N⋅m − 1.03

Setting of TJ boot length mm 85 ± 3 −

26-3

M1261000300460

Opening dimension of the
special tool (MB991561) mm

Crimped width of the EBJ boot band mm 2.4 − 2.8 −

When the EBJ boot
band (small) is crimped

When the EBJ boot
band (large) is crimped

2.9 −

3.2 −

LUBRICANTS

Item Specified lubricant Quantity

TJ boot grease Repair kit grease 145 ± 10 g

EBJ boot grease Repair kit grease 100 ± 10 g

SPECIAL TOOLS

Tool Number Name Use

MB990767 End yoke holder Fixing of the hub

M1261000400490

M1261000600483

MB991618 Hub bolt remover Removal of the hub bolt

MB991897 Ball joint remover Knuckle and tie rod end ball joint

disconnection

NOTE: Steering linkage puller
(MB990635 or MB991113)is also used
to disconnect knuckle and tie rod end
ball joint.

26-4

MB990241

AB

A

B

MB991354

MB990590

A

B

MB991721

AC100320AB

A

B

C

MB990326

FRONT AXLE

SPECIAL TOOLS

Tool Number Name Use

MB990241

A: MB990242
B: MB990244

Axle shaft puller

A: Puller shaft
B: Puller bar

Removal of the drive shaft

MB991354 Puller body

MB990590

A: MB990212
B: MB990211

Rear axle shaft oil
seal remover

A: Adapter

Removal of the front wheel hub

B: Slide hammer

MB991721 Slide hammer Removal of the output shaft

A: MB991017
B: MB990998
C: MB991000

A, B: Front hub

remover and
installer

C: Spacer

• Removal of the hub

• Provisional holding of the wheel

bearing

• Measurement of hub starting torque

• Measurement of wheel bearing axial

play

NOTE: MB991000, which belongs to
MB990998, should be used as a
spacer.

MB990685 Torque wrench Measurement of hub starting torque

MB990326 Preload socket

FRONT AXLE

MB991561

MB990925

SPECIAL TOOLS

Tool Number Name Use

26-5

MB991561 Boot band

BJ boot (resin boot) band installation

crimping tool

MB990925 Bearing and oil

seal installer set

• Removal of the wheel bearing

• Removal and installation of the

centre bearing

• Press-fitting of the dust seal outer,
inner

Tool Type Tool number O D mm

MB990925

A MB990926 39.0

MB990927 45.0

MB990928 49.5

MB990929 51.0

MB990930 54.0

A

Installer adapter

MB990931 57.0

MB990932 61.0

C

Brass bar

MB990933 63.5

MB990934 67.5

B

Bar (snap-in type)

Tool box

ACX02372

MB990935 71.5

MB990936 75.5

MB990937 79.0

B MB990938 −

C MB990939 −

AC

26-6

!

CAUTION

!

CAUTION

FRONT AXLE

ON-VEHICLE SERVICE

ON-VEHICLE SERVICE

WHEEL BEARING AXIAL PLAY CHECK

M1261000900268

During maintenance, take care not to contact the
parts or tools to the caliper because the paint of
caliper will be scratched.

1. Remove the caliper assembly and suspend it with
a wire.

2. Remove the brake disc from the front hub.

AC102438AD

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: 0.05 mm

4. If axial play exceeds the limit, disassemble the
front hub assembly and check the parts.

5. Install the brake disc, caliper assembly and
tighten the caliper assembly mounting bolts to the
specified torque 108 ± 10 N⋅m.

HUB BOLT REPLACEMENT

M1261001000332

2. Remove the brake disc.

MB991618

MB990767

AC102439AC

3. Use the following special tools to remove the hub
bolts.

• End yoke holder (MB990767)

• Hub bolt remover (MB991618)

MB990767

Plain
washer

AC102440

AC

4. Install the plain washer to the new hub bolt, and
install the bolt with a nut.

5. Install the brake disc, caliper assembly and
tighten the caliper assembly mounting bolts to the
specified torque 108 ± 10 N⋅m.

During maintenance, take care not to contact the
parts or tools to the caliper because the paint of
caliper will be scratched.

1. Remove the caliper assembly and suspend it with
wire so that it does not fall.