Mitsubishi 380. Manual — part 355

GENERAL DESCRIPTION

FRONT AXLE

26-2

GENERAL DESCRIPTION

M1261000100370

The front axle consists of front hubs, knuckles, wheel
bearings and drive shafts, and has the following fea-
tures:

• The wheel bearing incorporates double-row

angular contact ball bearing for reduced friction.

• The front wheel hub assembly combines the hub,

wheel bearing, and oil seal in a single unit for
fewer parts, better durability, improved assembly
precision, and better structural organization.

• The driveshaft incorporates BJ-PTJ type constant

velocity joints with high transmission efficiency for
low vibration and noise.

• Due to the use of the inner shaft and bracket

assembly, the right and left drive shafts are
approximately the same in length. This reduces
noise, vibration and torque steer.L-RH>

• The dynamic damper is mounted on the LH drive-

shaft.

• ABS rotor for detecting the wheel speed is

press-fitted to the BJ.

NOTE:

.

• TJ: Tripod Joint

• PTJ: Pillow Tripod Joint

• BJ: Birfield Joint

CONSTRUCTION DIAGRAM

FRONT AXLE DIAGNOSIS

TROUBLESHOOTING STRATEGY

M1261005600240

Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find a

front axle fault.
1. Gather information from the customer.

22DB013A

FRONT WHEEL

HUB ASSEMBLY

KNUCKLE

STRUT ASSEMBLY

PTJ (LH) <3.8L>

DRIVE SHAFT

(LH)

BJ

BRACKET

ASSEMBLY

DRIVE SHAFT (RH)

PTJ (RH)

INNER SHAFT

ABS ROTOR

DYNAMIC

DAMPER

<L-RH>

WHEEL

BEARING

OIL

SEAL

HUB

FRONT AXLE DIAGNOSIS

FRONT AXLE

26-3

2. Verify that the condition described by the

customer exists.

3. Find the malfunction by following the Symptom

Chart.

4. Verify malfunction is eliminated.

SYMPTOM CHART

M1261005700269

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Noise during Wheel Rotation

DIAGNOSIS

STEP 1. Check the wheel bearing end play.
(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 end play while moving the hub in the axial
direction.

Limit: 0.05 mm (0.002 inch)

Q: Is the wheel bearing end play within the limit?

YES : Go to step 2.
NO : Replace the part, then go to Step 5.

STEP 2. Check the drive shaft and inner shaft for bending.

Q: Is the drive shaft and inner shaft bent?

YES : Replace the part. Then go to Step 5.
NO : Go to step 3.

STEP 3. Check the center bearing for wear.

Q: Is the center bearing worn?

YES : Replace the bearing. Then go to Step 5.
NO : Go to step 4.

STEP4. Check the drive shaft assembly for wear or
damage.

Q: Is the drive shaft assembly worn or damaged?

YES : Replace the drive shaft assembly. Then go to Step 5.
NO : There is no action to be taken.

SYMPTOM

INSPECTION
PROCEDURE

REFERENCE PAGE

Drive shaft

Noise during wheel rotation

1

P.26-3

Noise due to excessive play of wheel in turning
direction

2

P.26-4

AC102438

SPECIAL TOOLS

FRONT AXLE

26-4

STEP 5. Retest the system.

Q: Is the abnormal noise eliminated?

YES : The procedure is complete.
NO : Repeat from Step 1.

INSPECTION PROCEDURE 2: Noise Due to Excessive Play of Wheel in Turning Direction

DIAGNOSIS

STEP 1. Check for play in the inner shaft and side
gear serration, the drive shaft and side gear
serration, or the drive shaft and front hub
serration.

Q: Is the play found?

YES :

Replace the part. Then go to Step 2.

NO :

The procedure is complete.

STEP 2. Retest the system.

Q: Is the abnormal noise eliminated?

YES :

The procedure is complete.

NO :

Repeat from Step 1.

SPECIAL TOOLS

M1261000600405

TOOL

TOOL NUMBER
AND NAME

SUPERSESSION APPLICATION

MB990767
Front hub and
flange yoke
holder

MB990767-01

Fixing of the hub

MB991618
Hub bolt remover

General service
tool

Removal of the hub bolt

MB991897
Ball joint
remover

MB991113-01,
MB990635-01 or
General service
tool

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

26-5

MB990241 Axle
shaft puller

A: MB990242

Puller shaft

B: MB990244

Puller bar

MB990241-01 or
General service
tool

Removal of the drive shaft

MB991354
Puller body

General service
tool

MB990590 Rear
axle shaft oil seal
remover

A: MB990212

Adapter

B: MB990211

Slide hammer

−

Removal of the front wheel hub

A: MB991017
B: MB990998
C: MB991000
A, B: Front hub

remover and
installer

C: Spacer

MB990998-01

• Removal of the hub

• Provisional holding of the wheel

bearing

• Measurement of hub starting torque

• Measurement of wheel bearing end

play

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

MB990685
Torque wrench

General service
tool

Measurement of hub starting torque

MB990326
Preload socket

General service
tool

MB990810
Side bearing
puller

General service
tool

• Removal of the center bearing

bracket

• Removal of the wheel bearing inner

race (outside)

TOOL

TOOL NUMBER
AND NAME

SUPERSESSION APPLICATION

MB990241AB

A

B

MB991354

MB990590

A

B

AC100320 AB

A

B

C

MB990326

MB990810