Engine JAC HFC4DA1-2C. Manual — part 165
FT
FT
FT
FT Four-Wheel
Four-Wheel
Four-Wheel
Four-Wheel Alignment
Alignment
Alignment
Alignment
- 186 -
3.
Toe-in effect
�
Effect of positive toe-in: Tire outside wear due
to excessive positive camber takes the form of
feature. Touch it from the inside to outside and
sharp needle like feeling can be felt on the
tread outer edge.
�
Effect of negative toe-in: Tire inside wear due
to excessive negative camber takes the form
of feature. Touch it from the outside to inside
and sharp needle like feeling can be felt on the
tread outer edge.
4.
In case of inconsistency between two wheel toe-in,
the vehicle shall be pulled to one side of the
smaller toe-in.
Kingpin
Kingpin
Kingpin
Kingpin caster
caster
caster
caster
Kingpin
Kingpin
Kingpin
Kingpin caster
caster
caster
caster definition
definition
definition
definition
It refers to the angle included between the steering axis
and the line vertical to ground, which indicates the
forward and backward inclination of the line between
the upper ball joint or strut top and the lower ball joint
viewed from the side of vehicle (called the imaginary
steering
axis). There are three kinds of caster, viz.
positive caster, negative caster and zero caster.
Caster
Caster
Caster
Caster adjustment
adjustment
adjustment
adjustment (generally
(generally
(generally
(generally nonadjustable
nonadjustable
nonadjustable
nonadjustable)
As for the adjustment of caster, make analysis and
judgment as per different vehicle models at first and
then
make
adjustment
through
adjusting
washer,
eccentric camshaft, eccentric ball joint, girder slot, or
balance bar.
Inclination
Inclination
Inclination
Inclination angle
angle
angle
angle definition
definition
definition
definition
Definition of inclination angle: The angle included
between the steering axis and the plumb line viewed
from the front of vehicle.
Kingpin inclination angle mainly functions for the
realization of auto return after steering and the increase
of adhesion force of vehicle. Kingpin inclination angle
is unadjustable and its standard value can be achieved
by the replacement of defect parts.
As for four-wheel alignment of SUNRAY vehicles, only
the data adjustment for front wheels can be realized but
not for rear wheels. Among various parameters of front
wheels, the camber and toe-in are adjustable. Determine
the camber at first and then adjust the toe-in in order to
ensure the stability of vehicle straight running.
Common faults:
1.
Abnormal wear of tire: Middle part wear, tire
shoulder wear, eccentric wear, feature-like wear,
serrated wear, wavy wear and spotty wear.
Middle part wear: Too high tire pressure.
Tire shoulder wear: Too low tire pressure and
overloading.
Eccentric wear: Improper camber.
Feature-like wear: Improper toe-in.
Serrated wear: Frequent brake application under
overloading condition for a long time and tire
rotation not conducted at regular intervals.
Wavy wear: Dynamic unbalance of tire, large
circular runout of wheel end face, looseness of hub
bearing and steering knuckle, too big thrust angle
of rear wheels and etc.
Spotty wear: Shimmy under high speed rotation of
wheel, excessive clearance of bearing, ball joint
and steering rod, dynamic unbalance of tire.
2.
Running
deviation:
Probably
caused
by
inconsistent kingpin inclination angle, camber,
caster, toe-in, tire pattern, shock absorber vibration
reduction effect or wheel base between left and
right wheels.
3.
Memory
deviation:
Probably
caused
by
interference of upper strut support motion, wear of
shock absorber steady bearing, over sticking of ball
joint or unbalance power steering.
4.
Torque deviation: Probably caused by stuck or
loose
ball
joint,
unequal
axle
angle
under
acceleration, nonconforming inclination angle and
included angle, or improper alignment of power
train.
FT
FT
FT
FT Four-Wheel
Four-Wheel
Four-Wheel
Four-Wheel Alignment
Alignment
Alignment
Alignment
- 188 -
Data
Data
Data
Data adjustment
adjustment
adjustment
adjustment of
of
of
of four-wheel
four-wheel
four-wheel
four-wheel alignment
alignment
alignment
alignment
1.
Check basic data of vehicle such as tire pressure,
fuel level, vibration reduction effect, tire wear
degree, accessories and tools. Recover it to the
delivery status.
2.
Drive the vehicle onto the lifter, with front wheels
held at the center of front turntable of the
four-column lifter.
3.
Maintain vehicle and tire horizontal and press the
nose by hand.
4.
Install the sensor and claw onto the tire properly
and maintain the sensor balanced.
5.
Turn on the four-wheel aligner and select the
current vehicle position.
6.
Operate on the basis of the computer reminder to
measure
the
actual
four-wheel
alignment
parameters.
7.
Compare the parameters provided by four-wheel
aligner with the standard data and calculate the
actual data for adjustment.
8.
Lift the vehicle. As the rear wheels are of
nonadjustable rear axle, only front wheel camber
and toe-in are adjustable.
9.
Adjustment of front wheel camber: Loosen the
mounting nut of shock absorber lower support,
knock down the lower swing arm with SST or crow
bar and record the number of washers, make
calculation and find out what kinds of washer
should be adopted on the basis of four-wheel
alignment data and actual vehicle parameters,
install the washer onto the lower swing arm and
then tighten the nut to the standard torque.
Tire camber: 0.3°. Check if it is within the normal
data range of vehicle through computer.
10. Adjustment of toe-in: Loosen the mounting nut of
tie rod, calculate the required data on the basis of
the actual toe-in and standard data, and observe if
the toe-in is within the standard range through
computer when making adjustment.
Attention:
The
adjusting
amount
should
be
controlled within half circle in order to avoid
inaccuracy.
Standard toe-in: 0~2mm.
Special
Special
Special
Special Tools
Tools
Tools
Tools for
for
for
for Sunray
Sunray
Sunray
Sunray
Attached List-Special Tools for Sunray
Applicable model: SUNRAY products manufactured by JAC (4DA1 Series)
Tool
Tool
Tool
Tool number
number
number
number
Tool
Tool
Tool
Tool name
name
name
name
Outline
Outline
Outline
Outline drawing
drawing
drawing
drawing
Purpose/application
Purpose/application
Purpose/application
Purpose/application
JAC-T8F001
Piston pin remover and
installer
Removing and installing piston pins (engine)
JAC-T8F002
Handle
Supporting use of related installer in bearing
installation (transmission)
JAC-T8F003
Flywheel stopper
Fixing flywheel for easy removal (engine)
JAC-T8F004
Cooling system tester
Checking cooling system for leakage (engine)
JAC-T8F005
Oil filter wrench
Removing and installing oil filter (engine)
JAC-T8F006
Valve oil seal installer
Installing valve oil seals (engine)
JAC-T8F007
Fuel pressure gauge
Measuring fuel pressure (engine)
JAC-T8F008
Compression gauge
Measuring cylinder pressure (engine)
JAC-T8F009
Pressure gauge
connector
Playing the role of an adapter during cylinder
pressure measurement (engine)
JAC-T8F010
Valve spring compressor
Compressing valve springs and removing
valves and related parts (engine)
JAC-T8F011
Camshaft gear puller
Removing camshaft gear (engine)
JAC-T8F012
Cylinder liner installer
(including jack)
Installing cylinder liners (engine)
Special
Special
Special
Special Tools
Tools
Tools
Tools for
for
for
for Sunray
Sunray
Sunray
Sunray
Tool
Tool
Tool
Tool number
number
number
number
Tool
Tool
Tool
Tool name
name
name
name
Outline
Outline
Outline
Outline drawing
drawing
drawing
drawing
Purpose/application
Purpose/application
Purpose/application
Purpose/application
JAC-T8F013
Cylinder liner puller
Removing cylinder liners (engine)
JAC-T8F014
Piston installer
Installing pistons (engine)
JAC-T8F015
Crankshaft front oil seal
installer
Installing crankshaft front oil seal (engine)
JAC-T8F016
Camshaft bushing
remover/installer
Removing and installing camshaft bushing
(engine)
JAC-T8F017
V-block for camshaft
measurement
Measuring camshaft damage (engine)
JAC-T8F018
Hose clamp pliers
Removing a clamp from a hose
JAC-T8F019
Piston ring extractor
Removing and installing piston circlips
(engine)
JAC-T8F020
Valve oil seal extractor
Removing valve oil seals (engine)
JAC-T8F021
End fork clip
Securing flywheel (engine)
JAC-T8F022
Crankshaft back bearing
remover
Removing crankshaft back bearing
JAC-T8F023
Crankshaft back bearing
installer
Installing crankshaft back bearing
JAC-T8F024
Diesel common rail tool
kit
The diesel common rail tester can accurately
and effectively diagnose a diesel engine with a
diesel common rail system and test its fuel
injection.
JAC-T8B001
Shift fork lock pin
remover
Removing shift fork spring pin (transmission)
JAC-T8B002
Oil seal puller
Removing oil seals (transmission)
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