Mitsubishi Lancer Evolution IX. Manual - part 573

UPPER ARM ASSEMBLY

REAR SUSPENSION

34-7

UPPER ARM ASSEMBLY

REMOVAL AND INSTALLATION

M1341003600335

CAUTION

• 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.

•

Post-installation Operation
• Press the dust cover with your finger to check that there 

are no cracks or damage in the dust cover.

• Wheel Alignment Check and Adjustment (Refer to 

P.34-4

).

AC310782

2

7

1

AB

39 ± 5 N·m

4

3

3

64 ± 4 N·m

¹

*

5

6

4

N

81 ± 6 N·m

49 ± 5 N·m

24 ± 4 N·m

Removal steps 

1.

Fuel filler cap*

2

2.

Protector*

2

3.

Bolt*

2

<<

A

>>

4.

Upper arm assembly and knuckle 
connection

5.

Upper arm assembly mounting bolt

6.

Upper arm stopper

7.

Upper arm assembly

*1

: To prevent bushings from breakage, the parts indicated by *1 should be temporarily tightened, 

and then fully tightened with the vehicle on the ground in the unladen condition.

NOTE: Install/remove the parts with the mark "*

2

" 

when installing/removing the LH side upper arm 
assembly.

Removal steps (Continued)

UPPER ARM ASSEMBLY

REAR SUSPENSION

34-8

REMOVAL SERVICE POINT
<<A>> UPPER ARM BALL JOINT AND 
KNUCKLE DISCONNECTION

CAUTION

• Do not remove the nut from ball joint. Loosen 

it and use special tool ball joint remover 
(MB991897 or MB992011) to avoid possible 
damage to ball joint threads.

• Hang special tool ball joint remover 

(MB991897 or MB992011) with a cord to pre-
vent it from falling. 

AC106820 AE

Cord

Bolt

MB991897
or
MB992011

Nut

Ball joint

1. Install the special tool ball joint remover 

(MB991897 or MB992011) as shown in the figure.

AC106821

Knob

Parallel

Bolt

Good

Bad

AB

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

jaws of the special tool ball joint remover 
(MB991897 or MB992011) 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 fig-
ure.

3. Tighten the bolt with a wrench to disconnect the 

upper arm assembly and the knuckle.

INSPECTION

M1341015500186

UPPER ARM BALL JOINT STARTING 
TORQUE CHECK

ACX00716

MB990326

AB

1. After shaking the upper arm ball joint stud several 

times, use special tool preload socket 
(MB990326) to measure the starting torque of the 
ball joint.

Standard value: 0.5 

− 2.5 N⋅m

2. When the measured value exceeds the standard 

value, replace the upper arm assembly.

3. When the measured value is lower than the 

standard value, check that the ball joint turns 
smoothly without excessive play. If there is no 
excessive play, the ball joint can be reused.

UPPER ARM BALL JOINT DUST COVER 
CHECK

1. Check the dust cover for cracks or damage by 

pushing it with your finger.

2. If the dust cover is cracked or damaged, replace 

the upper arm assembly.
NOTE: Cracks or damage of the dust cover may 
cause damage to the ball joint. When it is dam-
aged during service work, replace the dust cover.

UPPER ARM BALL JOINT DUST COVER 
REPLACEMENT

M1341010900413

Only when the dust cover is damaged accidentally 
during service work, replace the dust cover as fol-
lows:
1. Remove the dust cover.

AC212031AB

MB990800

UPPER ARM ASSEMBLY

REAR SUSPENSION

34-9

2. Fill the multipurpose grease in the dust cover and 

lubricate the lip. (Amount of filling grease in the 
dust cover: approximately 7 g).

3. Using the special tool ball joint remover and 

installer (MB990800), punch the dust cover until it 
contacts the snap ring.

4. Press the dust cover with your finger to check that 

there are no cracks or damage in the dust cover.

TRAILING ARM

REAR SUSPENSION

34-10

TRAILING ARM

REMOVAL AND INSTALLATION

M1341002200743

CAUTION

• 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.

•

Post-installation Operation
• Press the dust cover with your finger to check that there 

are no cracks or damage in the dust cover.

• Wheel Alignment Check and Adjustment (Refer to 

P.34-4

).

AC310784

5

4

5

AB

81 ± 6 N·m

N

147 ± 9 N·m*

3

4

1

2

Removal steps 

1.

Parking brake cable bolt

<<

A

>>

2.

Trailing arm assembly and knuckle 
connection

3.

Trailing arm assembly mounting bolt

4.

Trailing arm bushing stopper

5.

Trailing arm assembly

*

: To prevent bushings from breakage, the parts indicated by * should be temporarily tightened, 

and then fully tightened with the vehicle on the ground in the unladen condition.

Removal steps (Continued)