Front suspension ISUZU KB P190 2007 Workshop Manual PDF

3C-54 FRONT SUSPENSION
TROUBLESHOOTING
1. VIBRATION, SHOCK, AND SHIMMY OF STEERING WHEEL
Checkpoint Problem Countermeasure



Check front axle


Check wheel alignment


Check suspension ball joint


Check shock absorber or
attaching nut and bolt


Replace


Adjust


Replace


Replace or retighten


Check steering unit and
linkage


Faulty


Worn


Malfunction or loose


Check upper and lower link
bushings
Replace


Adjust


Worn


Incorrect

OK
OK
OK
NG
NG
NG
NG
NG
NG
OK
OK
Check vehicle trim height



• Improperly adjusted or worn front
wheel bearing.
• W orn or incorrectly adjusted wheel
bearing.
Replace; refer to Section 4C "Front
Wheel Drive"

• Insufficiently tightened steering
gear housing.
• W ear of steering linkage.
• Excessive backlash due to
improper adjustment of the steering
gear box.
• W orn column bearing, weakened
column bearing spring, or loose
clamp.
Replace; refer to Section 3B
"Steering"
• Improper tire pressure.
• Imbalance and deformation of frond
wheel.
• Unevenly worn tire or insufficient
tightening of wheel nuts.
Replace; refer to Section 3E "Wheel
and Tires"



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ISUZU KB P190 2007

FRONT SUSPENSION 3C-55
2. VEHICLE PULLS TO RIGHT OR LEFT
Checkpoint Problem Countermeasure



Steering linkage, and upper
and lower link


Rubber bushing for upper and
lower link


W heel alignment


Vehicle trim height


Replace


Replace


Adjust


Adjust


Deformed


Worn


Incorrect


Incorrect


Brake adjustment (binding)

Adjust


Replace


Incorrect

Collapsed or break (4 ×2
Except high ride suspension)
Collapsed or twisted (4 ×4, 4 ×2
High ride suspension)
Continued on the next page OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
OK
OK Coil spring (4
×2 Except high
ride suspension)
Torsion bar (4 ×4, 4 ×2 High
ride suspension)

Front wheel bearing

Adjust or replace

Incorrect adjustment or
abrasion

NG



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ISUZU KB P190 2007

3C-56 FRONT SUSPENSION
Checkpoint Problem Countermeasure



Tire tread (right and left)

Replace (tire)

Difference in wear and tear


Adjust or tighten

Improper or instufficient
tightening

NG
NG
OK
Tire pressure or wheel nuts

Continued from the previous page



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ISUZU KB P190 2007

FRONT SUSPENSION 3C-57
3. INSTABILITY OF VEHICLE
Checkpoint Problem Countermeasure



Tire pressure


W heel alignment

Rubber bushings for upper
and lower links. (4 × 2 Except
high ride suspension)


Adjust


Adjust


Replace


Incorrect



Incorrect


Worn


Steering linkage and upper
and lower links

Replace


Adjust


W orn or deformed


Incorrect

OK
OK
OK
NG
NG
NG
NG
NG
OK
OK
Vehicle trim height


Road wheel

Adjust

Deformed or unbalanced

NG



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ISUZU KB P190 2007

3C-58 FRONT SUSPENSION
4. STIFF STEERING WHEEL
Checkpoint Problem Countermeasure



Steering gear box or steering
linkage


Steering linkage


Steering gear


W heel alignment


Replace the part


Replace


Replace


Adjust

Insufficient lubricants or
impurities present; or
excessively worn

Deformed


W orn or damaged


Incorrect


Replace

Stiff or damaged or lack of
grease

OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
OK
Upper and ball joint


Steering column with turn
signal switch

Replace

Interference abrasion

NG

Tire pressure

Adjust

Improper

NG


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ISUZU KB P190 2007

FRONT SUSPENSION 3C-59
5. NOISES
Checkpoint Problem Countermeasure



Lubricating oil and grease for
upper and lower ball joint


Shock absorber


Stabilizer fixing nuts and bolts


Upper and lower links
bushings


Replace


Replace


Retighten


Replace


Insufficient


Faulty


Loose


Worn


Shock absorber fixing nut and
bolt

Retighten

Loose

Continued on the next page OK
OK
OK
OK
NG
NG
NG
NG
NG
OK

Upper and lower ball joint

Replace

Damaged

NG



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ISUZU KB P190 2007

3C-60 FRONT SUSPENSION
Checkpoint Problem Countermeasure

Steering linkage and steering
gearReplaceWorn
AdjustImproper
OK
NG
NG
OKTire pressure
Continued from the previous page
Steering unit fixing bolts and
linkageRetightenLoose
Adjust or replaceIncorrect adjustment or
abrasion
OK
NG
NG
OKFront wheel bearing
Lubricating oil and grease to
steering linkageReplaceInsufficient
NG
OK


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ISUZU KB P190 2007

FRONT SUSPENSION 3C-61
6. EXCESSIVE STEERING WHEEL PLAY
Checkpoint Problem Countermeasure



Front wheel bearing


Steering linkage


Adjust or replace


Replace


Incorrect adjustment or
abrasion


Worn


Replace

Worn

NG
NG
NG
OK
OK Upper, and lower links,
bushing (4 × 2 Except high
ride suspension)



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ISUZU KB P190 2007

3C-62 FRONT SUSPENSION
7. GRATING TIRE NOISE
Checkpoint Problem Countermeasure

Tire pressure
Knuckle spindle and steering
linkage
Adjust
Replace
Improper
Deformed
Suspension fixing boltReplace
Adjust
Loose
Incorrect
OK NG
NG
NG
NG
OK
OKW heel alignment



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ISUZU KB P190 2007

FRONT SUSPENSION 3C-63
8. EXCESSIVELY OR PARTIALLY WORN TIRE
Checkpoint Problem Countermeasure

Brake adjustment
W heel alignment
Adjust
Adjust
Incorrect
Incorrect
Front wheel bearingReplace
Adjust
Faulty
Improper
OK NG
NG
NG
NG
OK
OKTire pressure
Tire rotationRotate tires at recomended
intervalsNot rotated
OK
NG

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ISUZU KB P190 2007