Mitsubishi EVO VIII 260 Manual de usuario

26-1

GROUP 26

FRONT AXLE

CONTENTS

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

GENERAL INFORMATION

FRONT AXLE

26-2

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.

•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

SPECIFICATIONS

NOTE: The wheel bearing is part of the hub,

therefore its size is not listed here.

CONSTRUCTION DIAGRAM

Item Specification

Wheel bearing Type Unit ball bearing (Double-row

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

AC211166

Front wheel

hub assembly

Knuckle

Strut assembly

TJ (LH)

EBJ

Output shaft

Drive shaft

(RH)

TJ (RH)

Wheel bearing

Output shaft

Drive shaft

(LH)

ABS rotor

SERVICE SPECIFICATIONS

FRONT AXLE 26-3

SERVICE SPECIFICATIONS

M1261000300460

LUBRICANTS

M1261000400490

SPECIAL TOOLS

M1261000600483

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 −

Opening dimension of the

special tool (MB991561) mm

When the EBJ boot

band (small) is crimped

2.9 −

When the EBJ boot

band (large) is crimped

3.2 −

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

Item Specified lubricant Quantity

TJ boot grease Repair kit grease 145 ±10 g

EBJ boot grease Repair kit grease 100 ±10 g

Tool Number Name Use

MB990767 End yoke holder Fixing of the hub

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.

B990767

MB991618

AC106827

SPECIAL TOOLS

FRONT AXLE

26-4

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

B: Slide hammer

Removal of the front wheel hub

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

Tool Number Name Use

MB990241AB

MB991354

MB990590

MB991721

AC100320AB

MB990326

SPECIAL TOOLS

FRONT AXLE 26-5

MB991561 Boot band

crimping tool

BJ boot (resin boot) band installation

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 Number Name Use

MB991561

MB990925

Tool Type Tool number O D mm

A MB990926 39.0

MB990927 45.0

MB990928 49.5

MB990929 51.0

MB990930 54.0

MB990931 57.0

MB990932 61.0

MB990933 63.5

MB990934 67.5

MB990935 71.5

MB990936 75.5

MB990937 79.0

B MB990938 −

C MB990939 −

ACX02372

CBrass bar

Bar (snap-in type)

Tool box

MB990925

Installer adapter

ON-VEHICLE SERVICE

FRONT AXLE

26-6

ON-VEHICLE SERVICE

WHEEL BEARING AXIAL PLAY CHECK

M1261000900268

CAUTION

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.

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

CAUTION

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.

2. Remove the brake disc.

3. Use the following special tools to remove the hub

bolts.

•End yoke holder (MB990767)

•Hub bolt remover (MB991618)

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.

AC102438AD

AC102439 AC

MB990767

MB991618

AC102440

MB990767

Plain

washer

FRONT AXLE HUB ASSEMBLY

FRONT AXLE 26-7

FRONT AXLE HUB ASSEMBLY

REMOVAL AND INSTALLATION

M1261001700483

CAUTION

•Do not strike the ABS rotors installed to the EBJ outer race of drive shaft against other parts when

removing or installing the drive shaft. Otherwise the ABS rotors will be damaged.

•Be careful not to strike the pole piece at the tip of the front ABS sensor with tools during servicing

work.

•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 off quickly.

Pre-installation Operation

•Front Under Cover, Side Under Cover Removal

•Transmission Oil Draining (Refer to

GROUP22A, On-vehicle Service −Manual

Transmission Oil P.22A-149. )

•Transfer Oil Draining (Refer to GROUP22A,

On-vehicle Service −Transfer Oil P.22A-149. )

Post-installation Operation

•Check the dust cover for cracks or damage by

pushing it with your finger.

•Transfer Oil Filling (Refer to GROUP 22A,

On-vehicle Service−Transfer Oil P.22A-149. )

•Transmission Oil Filling (Refer to GROUP22A,

On-vehicle Service −Manual Transmission Oil

P.22A-149).

•Front Under Cover, Side Under Cover

Installation

AC211630

167 ± 9 N·m

25 ± 5 N·m

108 ± 10 N·m

226 ± 19 N·m

108 ± 10 N·m

8.9 ± 1.9 N·m

Removal steps

1. Split pin

<<A>> >>A<< 2. Drive shaft nut

>>A<< 3. Washer

4. Front ABS sensor

<<B>> 5. Caliper assembly

<<C>> 6. Brake disc

7. Dust cover

8. Connection for lower arm ball joint

<<D>> 9. Self-locking nut (tie rod end

connection)

<<E>> 10. Drive shaft

11. Nut (hub and knuckle to strut

connection)

12. Hub and knuckle assembly

Removal steps (Continued)

FRONT AXLE HUB ASSEMBLY

FRONT AXLE

26-8

REMOVAL SERVICE POINTS

<<A>> DRIVE SHAFT NUT REMOVAL

CAUTION

Do not apply pressure to wheel bearing by the

vehicle weight to avoid possible damage when

drive shaft nut is loosened.

Use special tool end yoke holder (MB990767) to fix

the hub and remove the drive shaft nut.

<<B>> CALIPER ASSEMBLY REMOVAL

CAUTION

During maintenance, take care not to contact the

parts or tools to the caliper because the paint of

caliper will be scratched.

Secure the removed caliper assembly with wire, etc.

<<C>> BRAKE DISC REMOVAL

If the brake disc is seized, install a M8×1.25 mm

bolts as shown, and remove the disc by tightening

the bolts evenly and gradually.

<<D>> SELF-LOCKING NUT (TIE ROD

END CONNECTION) REMOVAL

CAUTION

•Do not remove the nut from ball joint. Loosen

it and use the special tool to avoid possible

damage to ball joint threads.

•Hang the special tool with cord to prevent it

from falling.

1. Install special tool ball joint remover (MB991897)

as shown in the figure.

2. Turn the bolt and knob as necessary to make the

jaws of special tool parallel, tighten the bolt by

hand and confirm that the jaws are still parallel.

NOTE: When adjusting the jaws in parallel, make

sure the knob is in the position shown in the

figure.

3. Tighten the bolt with a wrench to disconnect the

tie rod end.

AC102462

MB990767

AC205799AC

Bolts

(M8×1.25)

AC208247AD

Cord

Bolt

MB991897

Nut

Ball joint

AC106821

Knob

Parallel

Bolt

Correct

Wrong

FRONT AXLE HUB ASSEMBLY

FRONT AXLE 26-9

<<E>> DRIVE SHAFT REMOVAL

1. Use the following special tools to push out the

drive shaft from the hub and knuckle.

•Puller shaft (MB990242)

•Puller bar (MB990244)

•Puller body (MB991354)

•End yoke holder (MB990767)

2. Withdraw the drive shaft from the hub by pulling

the bottom of the hub and knuckle towards you.

3. Hang the drive shaft on the vehicle body with a

rope.

INSTALLATION SERVICE POINT

>>A<< WASHER/ DRIVE SHAFT NUT

INSTALLATION

CAUTION

Before securely tightening the drive shaft nuts,

make sure there is no load on the wheel

bearings. Otherwise the wheel bearings will be

damaged.

1. Be sure to install the drive shaft washer in the

specified direction.

2. Using special tool end yoke holder (MB990767),

tighten the drive shaft nut to the specified torque.

Tightening torque: 226 ±19 N⋅m

INSPECTION

M1261001800286

•Check the hub for cracks and spline for wear.

•Check the knuckle for cracks.

AC201827

MB991354

MB990244

(Three)

MB990242

MB990767

AC102551AC

Drive shaft

AC102465AD

MB990767

Washer

FRONT AXLE HUB ASSEMBLY

FRONT AXLE

26-10

DISASSEMBLY AND REASSEMBLY

M1261001900261

DISASSEMBLY SERVICE POINTS

<<A>> FRONT WHEEL HUB ASSEMBLY

REMOVAL

1. If the front wheel hub is seized, remove the

knuckle together with front wheel hub and fix them

with a vise.

2. Use the following special tools to pull out the front

wheel hub from the knuckle.

•Puller bar (MB990244)

•Puller body (MB991354)

•Slide hammer (MB990211)

INSPECTION

M1261002000108

WHEEL BEARING ROTATION STARTING

TORQUE AND AXIAL PLAY CHECK

1. Tighten the following special tools to the specified

torque.

•Front hub remover and installer (MB991017)

•Spacer (MB991000)

Tightening torque: 226 ±19 N⋅m

2. Hold the front wheel hub assembly in a vice with a

wooden block.

3. Rotate the hub in order to seat the bearing.

AC211631AC

88 ± 10 N·m2

Disassembly steps

1. Knuckle

<<A>> 2. Front wheel hub assembly

AC210309 AE

MB990211

MB991354

MB990244

AC301927AF

MB991000

MB991017

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