suspension MITSUBISHI SPYDER 1990 Service Repair Manual

26-4FRONT AXLE Special
Shimmy
or abnormal wear of driveshaft
unctionof front suspension and steering
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WHEEL AND TIRE
Symptom
Rapid wear at
shouldersProbable cause
Under-inflationor lack of
tion
Remedy Reference
Adjust the tire
Refer to
p r e s s u r e .
Rapid wear at
Over-inflation or
center
lack of rotation
I
treads Under-inflation Adjust the tireRefer to
pressure.
Wear on one side
Excessive
ber Check thecamber.
Refer to GROUP On-vehicle
Service.
Feathered edge Incorrect toe-in
Adjust the
toe-in.
Bald spots Unbalanced
wheel
Adjust the
wheels.
Scalloped wear Lack of rotation of tires or
worn orRotate the Refer to GROUP
out-of-alignment suspension check the front On-vehicle
suspension Service.
alignment.
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FRONT SUSPENSION General Information
GENERAL INFORMATION
The front suspension is of a multi-link constructionby mounting the upper arm in a higher position
with two lower arms which create the ideal virtual than the tires, excellent steering stability and ride
kingpin axis for the suspension system. In addition ,comfort are obtained.

itemsMedium price
High price
Premium price
I
Premium priceHigh price I Low Low ,I
Coil spring
Wire diameter
O.D. free length
1 3 . 1
309.5 315.5 mm3.315 4.890 3.323 4.898
124.2
3.315
I 12.185) 12.421) 12.185)
Identification color White Pink White GravIWhite pink
124.4 315.5
Spring constant 43.0 (246) 43.0 (246)
I
43.0 (246)N/mmI
43.0 (246)
I
Shock absorberstroke118 (4.6) 118(4.6)116 (4.6) 118 (4.6)
Shock Expansion
(Ibs.)1255 16671432 1902(322 528)
absorber 1167 1579(267355)1481 1952 (333 439)
damping force
Contraction471-706(106520
(0.9
Premium price AWD
Coilspring Wire diameter 13.3 84.6 124.6 312.013.5 85.0 125.0
O.D. free length 3.331 4.906 12.283)3.346
mm (in.)
Identification color Green Light blueGreen
Spring constant43.0 (246)
N/mm
Shock absorber stroke mm (in.)118 (4.6)
ShockExpansion (Ibs.)
1432 -1902 (322 428)
absorber
damping force
Contraction530 785 (119 176)
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Medium price Premium pricePremium price
Coil spring Wire diameter 13.5 85.0 125.0 13.6 85.2 125.2 13.8 85.6 125.6
O.D. free length304.5 3.346 309.5 3.354 315.0 3.370
mm (in.) 4.921 11.988)
4.929 12.165)4.945 12.402)
Identification color Cream
PurpleCream RedCream Light blue
Spring constant 43.0 (246) 43.0 (246) 43.0 (246)
N/mm
Shock absorber stroke 118 (4.6) 118 (4.6) 118 (4.6)
ShockExpansion (Ibs.)
1206 1638 (271 368)
absorber
damping force
[atContraction 471 -706 (106 159)
(0.9

FRONT __
TROUBLESHOOTING
, .
SymptomProbable cause
Remedy
Steering wheel is heavy, vibratesSuspension malfunction
or pulls to one side, ,
Ball jointAdjust or replace
Coil spring
Wheel alignment
Unbalanced or worn tires Adjust or replace
Adjust or
Adjust or replace
Excessive vehicle rollingBroken or deteriorated stabilizer
Shock absorber malfunction
Replace
Improper tire inflation pressure
NoiseLack of lubrication
Looseness and wear of each part
.
Broken coil spring
Shock absorber malfunction
Replace
FRONT WHEEL
ADJUSTMENT
Measure wheel alignment with alignment equipment on a
level surface.
The ‘front’ ‘suspension, and should
be serviced to normal to wheel
alignment.
TOE-IN
The suspension wheel be
t o
Standard value: 0 3 mm 0 in.
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FRONT SUSPENSION On-vehicle Service
NOTE .
1.If the toe-in is not standard value, adjust the
toe-in by undoing, the and the left arid
tie rod by the same amount (in opposite direc-
tions).
2. The toe will move out as the is turned
toward the front of the vehicle and the
is turned toward the rear of the vehicle.
STEERING ANGLE
Standard value:
Inner wheel
(AWD)
Outer wheel
(FWD)
(AWD)
CAMBER
Standard value:
(Vehicles with lbinch wheels)
(Vehicles with wheels),AWD
CASTER
Standard value:
NOTE
1.Camber and caster are preset at the’factory and can not
be adjusted.
2. If camber is not within the standard value, chec k
replace bent or damaged parts.
3. For vehicles with aluminum type’ wheels, attach the
camber/caster/kingpin gauge to the drive shaft by ‘using
the special tool. Tighten the special tool, to the same
torque
Nm as drive shaft
nut.
Caution
Never subject the wheel bearings to the load
when the drive shaft nuts are loosened.
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FRONT SUSPENSION Upper Arm .
UPPER ASSEMBLY
REMOVAL AND INSTALLATION
Post-installation OperationFront Wheel Alignment Adjustment(Refer to
5741
Removal steps
1. Upper arm ball joint and knuckleconnection2. Upper arm self-locking nut3. Upper arm assembly
4. Upper arm shaft assembly
Nut
Upper arm shaft
REMOVAL SERVICE ‘POINT
ARM BALL AND
Caution
1.Use the special tool to loosen the
loosen the nut: do not from the
2. the special tool with cord; etc. to prevent
it from coming
INSTALLATION SERVICE POINT
UPPER ARM SHAFT ASSEMBLY INSTALLATION
Install the upper arm shaft assembly at the angle s hown
in the illustration.
NOTE
If the upper arm shaft is installed at the above-me ntioned
angle, the reference dimension is determined as fol lows;
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FRONT SUSPENSION Upper Arm Assembly
A 299.9 mm (11.8 in.)
234.0 mm (9.2 in.)
Ball joint case
00000009
INSPECTION
lCheck the bushings for wear and deterioration.
lCheck the upper arm for bends or damage.
lCheck all bolts for condition and straightness.
IBALL JOINT BREAKAWAY TORQUE CHECK
(1) After shaking the ball joint stud times, install the
nut to the stud and use the special tool to measure the
breakaway torque of the ball joint.
Standard value: Nm (3-22
(2) When the measured value exceeds the standard va lue,
replace the upper arm assembly.
(3) When the measured value is lower than the stand ard
value, check that the ball joint turns smoothly wit hout
excessive play. If so, it is possible to use that b all joint.
BALL DUST COVER CHECK
If there are any cracks in or damage to the dust co ver, replace
the arm assembly.
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FRONT SUSPENSION Shock Absorber
DISASSEMBLY AND, REASSEMBLY
12
9
- -
Disassembly steps
n u t
Upper bushing A 4. Upper bracket assembly
5. Upper spring pad
6. Collar
1 2 3 7 .
7. Upper bushing 8. assembly . . 10. Dust cover
12. Shock
,
DISASSEMBLY SERVICE POINT
SELF-LOCKING NUT REMOVAL
(1) the coil spring using the special tools.
Caution
1. Install the special tools evenly so that the
maximum length will be attained
the
installation range.
2. Do not use an impact wrench to tighten the specia l
tool bolt.
(2) While holding the piston rod, remove the self-locking nut.
Caution
Do not use an impact wrench to the
tool bolt.
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FRONT SUSPENSION Shock Absorber
Damper foinstallation
of the body
REASSEMBLY. SERVICE
COIL SPRING INSTALLATION
(1) Use the special tools to
the coil spring and
install it to the shock absorber.
Caution
Do not use an impact wrench to tighten the bolt of
the special tool.
(2) Align the edge of the coil spring to the steppe d part of
the shock
spring seat.
UPPER BRACKET ASSEMBLY
so that the position as’
in the illustration with respect the fork installation
bolt.
. SELF-LOCKING NUT . .
( 1 )
(2). the special tools and
tighten the
to- the ,
Caution
Do not use an impact wrench.
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Compression Lower and
FRONT SUSPENSION
Lower Arm
COMPRESSION LOWER ARM AND LATERAL ARM
ASSEMBLIES
REMOVAL AND INSTALLATION
Post-installation OperationlFront Alignment Adjustment(Refer to ,
98-118
\ 6 9 - 7 8
Compression lower arm assemblyremoval steps
1. Compression lower arm bail joint
and knuckle connection
2. Compression lower arm mounting
bolts3. Compression lower arm assembly
Lateral lower arm assemblyremoval steps
4.
Stay5. absorber lower mounting
6. Lateral lower arm ball joint and
knuckle connection7. Lateral lower arm mounting bolt
8. Lateral lower arm assembly
CautionIndicates parts which should be tightened,
and then fully tightened with the on the ground
in the unladen condltlon.
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