Page 629 of 796

07-14
3) Caster
The angle between the vertical line and king pin, which fixes the steering knuckle and front axle,
(steering column which connects the top and bottom ball joints in the independent axle type) when
viewed the tires from the side.
CasterFront4.80˚±0.50˚
Rear -
Disadvantages:Impact from the road is transferred to the steering wheel (steering wheel turns)
Poor straightness -
- Advantages:Directional force to go straight (following control)
Restoring force of the wheel (restored to the straight ahead direction)
Prevention of wheel shimmy (wheels wobble left and right) -
-
-
Negative caster: ▶Top of the king pin is tilted forward from the vertical line of the wheel center
when viewed the tires from the side Positive caster: ▶
With considering the height difference between the wheel centers of the front and rear
wheels. (Under standard condition that the vehicle is on a level ground) Caster: ▶
Advantages:Smaller turning radius -Top of the king pin is tilted backward from the vertical line of the wheel center
when viewed the tires from the side
Page 688 of 796

11-6
4. TROUBLESHOOTING
Problem Possible Cause Action
Movements of steering
feels heavyIrregular wear or binding of steering ball joint
due to lack of lubrication or foreign material
insertionLubricate or replace
Damaged or defective steering gear Replace the steering gear
assembly
Incorrect steering pinion preload Adjust
Defective steering shaft join Replace
leakage of steering fluid Repair or replace
Insufficient steering fluid or air insertionFill up fluid or bleed air
Defective steering oil pump Replace
Damaged or loosened pump drive belt
Adjust or replace
Clogging of fluid line Repair or replace
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Steering wheel pulls to
one sideDamaged steering linkage Replace
Damaged wheel or tire Repair or replace
Defective brake system Repair or replace
Defective suspension Repair or replace
Excessive free play of
steering wheelWorn steering gear Replace the steering gear
assembly
Worn or damaged steering ball joint Replace
Looseness of steering gear box Retighten
Poor returning of steering
wheelBroken or binding of steering ball joint Replace
Improper correct steering pinion preload Replace the steering gear
assembly
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Page 689 of 796

11-74610-00
Problem Possible Cause Action
Excessive vibration of
steering wheel (shimming)Broken steering linkage Replace
Looseness of steering gear box Retighten
Broken or binding of steering ball joint Replace
Worn or damaged front wheel bearing Replace
Damaged wheel or tire Repair or replace
Defective suspension Repair or replace
Abnormal noise from
steering systemLooseness of steering gear box Retighten
Defective steering gear Replace the gear
assembly
Interference between steering column and
partsRepair
Looseness of steering linkage Retighten
Loosened or damaged oil pump drive belt Repair or replace
Looseness of oil pump bracket Retighten
Looseness of oil pump Retighten
Air insertion into system Bleed air
Defective oil pump Replace
Abnormal noise when
turning steering wheelLooseness of steering column Retighten
Worn or damaged steering shaft bearing Replace the steering
column
Looseness of intermediate shaft Retighten
Too heavy steering wheel Worn or damaged steering shaft bearing Replace the steering
column
Ignition key cannot be
inserted into key cylinderDefective lock cylinder Replace the steering
column
Defective ignition switch Replace the ignition
switch