Chery Fora (Elara A520). Manual — part 114

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43

SECTION II FRONT WHEEL ALIGNMENT

I. CHECK AND REGULATE THE
FRONT-WHEEL KINGPIN CASTER
ANGLE,

FRONT-WHEEL

CAMBER

ANGLE,

FRONT-WHEEL

TOE-IN

ANGLE AND STEERING ANGLE:

Criteria: Front wheel alignment should meet
the requirements as follows:

Kingpin caster

angle

2

0

50′±30′

Front wheel

camber angle

0

0

±10′

Front wheel

toe-in

5′47＂±5′(or

1mm)

Kingpin

inclination angle

12

0

35′±30′

II. FRONT WHEEL TOE-IN AND
STEERING ANGLE ADJUSTMENTS

1. Front wheel toe-in

Toe-in adjustment can be done by use of
optical test instrument or mechanical toe-in
regulator. Wheel aligner or alignment tester
should be installed on the wheels.

Installation should be carried out according
to the concrete instructions of the equipment
manufacturers.

(1) To meet the requirement of test

instruments,

you

should

make

preparations for the wheel alignment,
and use the steering wheel limiter
purchased on the market to fix the
steering wheel in the right ahead
position .( The steering wheel must be
at the central position ±5°, and the
lower clamping flange bolts of steering
shaft must be horizontal.)

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44

(2)

Loosen the locknut of right steering tie
rod and rubber sleeve clamp, and screw
down the toe-in adjusting lever to
regulate the length as per requirements
until it reaches the specified numerical
value.

(3)

Fasten the locknuts, reinstall the rubber
sleeve clamp, and check whether the
locknut is fastened and the sheath is at
the proper position.

(4)

After the front wheel toe-in is well
adjusted, you should check whether the
steering wheel is horizontal or not.
Otherwise, you should loosen the
locknuts of steering wheel to regulate it
to the horizontal position and fasten the
locknuts to meet the torque requirement
(30±3Nm).

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45

2.

Check the front wheel steering angle

After replacing tie rod joints or regulate
toe-in, you should check the steering angle.
If the front wheel steering angle doesn't
comply with relevant standards, you should
check and regulate the length of left and
right tie rods.

3.

Kingpin caster angle

Kingpin caster angle is determined in design
structure; therefore, it need not be regulated.

Influence of caster angle

The main functions of caster angle are to
keep the car driving towards the right ahead.
If the caster angle is of positive value, in the
case of front wheel steering, the inner side of
the car shall descend and the chassis shall
ascend, which shall add loads to the steering
knuckle. If the caster angles of front wheel
and rear wheel are the same, the car shall
return to the right ahead position after
steering. The increasing of positive caster
angle shall improve the stability of steering
wheel, but the force shall become stronger in
the case of steering; while the decreasing of
positive caster angle shall lower down the
stability of steering wheel, but the force shall
become weaker in the case of steering. The
degree of caster angle shall not impose
influence on the tire wearing, which is used
to stabilize the driving direction of car and
make

the

car

return

to

alignment

automatically in the case of steering. If the
car is quipped with traditional mechanical
steering device, the degree of caster angle is
very small and even inclines to negative
caster angle, which can make it easy for
steering. If the car is furnished with dynamic
steering device, the caster angle is often
designed as bigger positive angle, which can
make the driver sensitive to steering. The
increasing of positive caster angle shall

Maximum rotating angle of

outer wheel

33

0

Maximum rotating angle of

inner wheel

41

0

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46

enhance the steering force, but can improve
the stability of straight driving.

4.

Camber angle

Under normal circumstances, there is no
need to regulate the camber angle of the
installed independent suspensions and wheel
steering knuckle. If the wheel camber angle
deviates from the tolerance range due to
other reasons, the connecting bolt of
independent suspension and steering knuckle
can be used to rectify the camber angle.

(1)

Prior to rectification, you should firstly
inspect (visual inspection) whether the
driving components are damaged, and
replace the damaged components;

(2)

If the front-wheel camber angle is
found to exceed the deviation, you
should loosen the connecting bolt① of
front vibration damper and steering
knuckle, and move the wheel to rectify
the camber angle.

Adjust the Bolt①