Honda Civic manuals

Subaru Legacy Service Manual: Inspection

Check the following items before performing the wheel alignment measurement.

Tire inflation pressure

Uneven wear of RH and LH tires, or difference of sizes

Tire runout

Excessive play and wear of ball joint

Excessive play and wear of tie-rod end

Excessive play of wheel bearing

Right and left wheel base imbalance

Deformation and excessive play of steering link

Deformation and excessive play of suspension parts

Check, adjust and measure the wheel alignment in accordance with the following procedures.

1

Wheel arch height (front and rear wheels)

Inspection: Wheel Alignment > INSPECTION

2

Camber (front and rear wheels)

Inspection: Wheel Alignment > INSPECTION

Adjustment: Wheel Alignment > ADJUSTMENT

3

Caster (front wheel)

Inspection: Wheel Alignment > INSPECTION

4

Steering angle

Inspection: Wheel Alignment > INSPECTION

Adjustment: Wheel Alignment > ADJUSTMENT

5

Front wheel toe-in

Inspection: Wheel Alignment > INSPECTION

Adjustment: Wheel Alignment > ADJUSTMENT

6

Rear wheel toe-in

Inspection: Wheel Alignment > INSPECTION

Adjustment: Wheel Alignment > ADJUSTMENT

7

Thrust angle

Inspection: Wheel Alignment > INSPECTION

Adjustment: Wheel Alignment > ADJUSTMENT

1. WHEEL ARCH HEIGHT

1. Park the vehicle on a level surface.

2. Empty the vehicle so that it is at “curb weight”.

NOTE:

Empty the trunk or luggage room, load the spare tire, jack and service tools, and fill up the fuel tank.

3. Set the steering wheel in a straight-ahead position, and stabilize the suspension by moving the vehicle in a straight line for 5 m (16 ft) or more.

4. Suspend a thread from the wheel arch (point “A” in the figure below) and affix at a position directly above the center of wheel.

5. Measure the distance between the point “A” and the center of wheel.

(1)

Wheel arch height

(4)

Front wheel arch height

(7)

Point of measurement

(2)

Front fender

(5)

Rear wheel arch height

(8)

End of spindle

(3)

Rear quarter

(6)

Flange bend line

Model

Tire size

Wheel arch height specification mm (in)

(Tolerance: +12 mm −24 mm (+0.47 in −0.94 in))

Front

Rear

Sedan model

P225/55R17

P225/50R18

397 (15.6)

383 (15.08)

OUTBACK model

P225/65R17

P225/60R18

468 (18.43)

468 (18.43)

2. CAMBER

1. Place the front wheel on the turning radius gauge.

NOTE:

Make sure the ground contact surfaces of the front and rear wheels are at the same height.

2. Set the adapter into the center of wheel, and then set the wheel alignment gauge.

(1)

Alignment gauge

(2)

Turning radius gauge

(3)

Adapter

3. Measure the camber angle in accordance with the operation manual for wheel alignment gauge.

Tire size

Camber (difference between RH and LH 45' or less)

Front

Rear

Sedan model

P225/55R17

P225/50R18

−0°15'±0°45'

−1°25'±0°45'

OUTBACK model

P225/65R17

P225/60R18

0°00'±0°45'

−1°00'±0°45'

3. CASTER

1. Place the front wheel on the turning radius gauge. Make sure the ground contact surfaces of the front and rear wheels are at the same height.

2. Set the adapter into the center of wheel, and then set the wheel alignment gauge.

(1)

Alignment gauge

(2)

Turning radius gauge

(3)

Adapter

3. Measure the caster angle in accordance with the operation manual for wheel alignment gauge.

Tire size

Caster

Sedan model

P225/55R17

P225/50R18

5°50'

OUTBACK model

P225/65R17

P225/60R18

5°00'

4. STEERING ANGLE

1. Place the vehicle on turning radius gauge.

2. While depressing the brake pedal, turn the steering wheel fully to the left and right.

3. With the steering wheel held at each fully turned position, measure both the inner and outer wheel steering angles.

Model

Tire size

Inner wheel

Outer wheel

Sedan model

P225/55R17

P225/50R18

37.6°±1.5°

32.8°±1.5°

OUTBACK model

P225/65R17

P225/60R18

38.6°±1.5°

33.8°±1.5°

5. FRONT WHEEL TOE-IN

Toe-in: Inspection value

0±3 mm (0.00±0.12 in)

1. Set the toe-in gauge in the position at wheel axis center height behind the right and left front tires.

2. Place a mark at the center of both left and right tires, and measure distance “A” between the marks.

3. Move the vehicle forward to rotate the tires 180°.

NOTE:

Be sure to rotate the tires in the forward direction.

4. Measure the distance “B” between the left and right marks. Find toe-in using the following calculation:

A − B = Toe-in

6. REAR WHEEL TOE-IN

Refer to the FRONT WHEEL TOE-IN for rear toe-in inspection procedures. Wheel Alignment > INSPECTION

Toe-in: Inspection value

3±3 mm (0.12±0.12 in)

7. THRUST ANGLE

1. Park the vehicle on a level surface.

2. Move the vehicle 3 — 4 meters (10 — 13 feet) straight forward.

3. Draw the center of loci for both the front and rear axles.

4. Measure distance “L” between the center lines of the axle loci.

Thrust angle: Inspection value

0°±30'

Less than 30' when “L” is 23 mm (0.9 in) or less

(a)

Center line of loci (front axle)

(b)

Center line of loci (rear axle)

Wheel alignment
...

Adjustment
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