Chery A15. Manual — part 64
Adjusting the snow chain of the tire should accord to the type of the road condition.
Inspection must be applied before install the snow chain. Please refer to the instruction of the
snow chain manufacturer when install the snow chain on the tire. Please remove the wheel
house before install the snow chain which may score the wheel house. Install the snow chain
firmly on the front tire. It is not recommended to fix the snow chain on the rear wheel. The
snow chain should be retightened after 0.5~1.0km driving with it.
Precaution: Using the snow chain may affect the vehicle maneuverability, so the vehicle
speed should not excess 50km/h (30mph) or the speed limited by the snow chain
manufacturer(less than 50km/h). Please stop the car and tighten the snow chain
immediately when hearing collision between the snow chain and the vehicle body or the
chassis when using the snow chain. Abrupt turning, concussion and passing the
chuckhole, the vehicle locking and braking should be avoided. The instruction of the
snow chain manufacturer should be also complied. Improper utilization of the snow
chain will cause interference between the snow chain and the vehicle body.
Installation of the tire
----Make sure that the opening of the valve is slippery and no burrs before installing the tire
valve. Then apply glycerol onto the rubber surface of the tire valve or dip it briefly in the
glycerol. Pull or press the locating ring of the tire valve with special purpose tool at the
force of 200-400N in order to make it through the hole on the wheel, which means the
installation is finished. (Suds are permitted to replace the glycerol.)
----Wipe glycerol or suds round the bead before installing the tire, and please note at the
same time:
When there is a light point mark on the rim, please aim the uniformity test mark at the point.
When there is no light point mark on the rim, please aim the dynamic balance test mark at
the position of the tire valve.
When there is no light point mark on the rim and no dynamic balance test mark but the static
balance test mark on the tire, please aim the tire valve at the static balance test mark.
The instructions for the uniformity, dynamic balance and static balance test mark of the tire
should be offered by the production department or the supplier in written form.
----Inflate the tires according to the specified pressure strictly. Please do not excess 10% of
the rated pressure during inflating. The spare tire assy is assembled at the rated pressure
of 3.5atm and is separately stored with the four tires installed on the vehicle. Please check
and adjust the tire pressure before the four wheel alignment: front wheel 2.0±0.2atm,
rear wheel 2.1±0.2atm.
----Screw the valve cap after inflating the tire and undergo the dynamic balance test. Set the
proper weight balance block onto the inside and outside brims of the rim as required. The
M-4
final assy imbalance is expected to be less than 100g·cm, approximately equal to a 5g
balance block on the inside and outside brims of the rim.
Precaution: No more than one balance block with 70g weight at most is allowed to
set on each side of a wheel. Avoid over hitting on the balance block. If that happened,
replace it immediately. Do not reuse the replaced balance block.
----During installing the wheel and the tire assy, pre-screw the wheel bolt on the rim by hand
first, and then tighten the screws with the special purpose tools under the way of diagonal
method, (the tightening torque is 100±10N·m). No impact wrench is allowed in order to
avoid screwing too tight or loose. Do not use lubricating grease while installing the wheel
bolt. (The wheel bolt should be tightened to maintain the tightening torque after the initial
100km driving since the new installation of the wheel and tire assy. The check of the
tightening torque of the wheel bolt is one of the daily service items.)
----Decussating method is adopted to tighten the set nut. The tightening degrees should be
similar so that the wheels can turn freely. The wheel should stand on the ground during
the last tightening.
----Install the trim cover or place it as required. Clip trim cover should be installed into
through beating by hand or prying by rubber tools.
USUAL TROUBLES OF THE TIRE
Proper utilization of the tire
The tire is an important part of the wheel assy. Please pay attention to the following items
while using:
------The tire of the same manufacturer and the same No. should be used on the same vehicle.
------Do not install tires out of the specified types
------Make all the tires wear evenly. In order to remedy and lighten the uneven wear, besides
periodic checking and correcting the parameters of the wheel alignment, the rotation
should be also applied. The specific rotation way depends on the practical wearing status.
It is recommended to adopt the tire rotation at interval of 5000~8000km
Usual troubles of tires and trouble diagnosis
------Wear on shoulder of tire
The wear on shoulder of tire means the brim with burrs forming of the tire wears are more
badly than other parts. The theoretical reason for the wear on shoulder of tire is that the tire
rolls at the limit lateral runout angle.
Main reason: Frequently steering at high speed, improper adjusting the toe-in and the camber,
or often driving on the vaulted or zigzag road.
M-5
Maintenance: Adjusting the positioning angle of the front wheel
------Wear on center of tire
The wear on center of tire means the abnormal wear on the center surface of the tire. The
theoretical reason for this kind of wear is that the diameter elongation at the center of the tire
surface is larger than that on the shoulder of the tire.
Main reason: Overhigh tire pressure
Maintenance: Readjusting the tire pressure to make it within the range of the specified value.
------Serrated wear
The serrated wear means the wear on the surface of the tire strip in ladder shape. The
theoretical reason for this kind of wear is the uneven deformation of the tread pattern of the
tire contact patch.
Main reason: The toe-in and the camber are not conformed to the specified value
Maintenance: Adjusting the toe-in and the camber to make it within the specified value.
Checking the tire pressure is within the specified range.
------Initial severe wear somewhere on the tire
The initial severe wear is the severe wear on the tread pattern of tire contact patch due to the
wheel locking while emergent braking.
Main reason: Vehicle speed while emergent braking, road conditions, wheel load and the
braking intensity
Maintenance: Avoiding emergent braking and taking precautionary measure as early as
possible
------Nick and crack on the sidewall of tire
The main reason is the sharp things on the road or the little stones, nails and metal flakes
embedded into the tread slot.
------Initial wear on half round of the tire or wear in different places of the shoulders on
both sides
The main reason is the gyration part is in unbalanced state, or the tire and wheel are eccentric,
or the bearing is worn or loose and so on. The eccentricity or bend of the rim or the steering
knuckle may also cause the wear.
Troubleshooting Guide
Trouble Possible
causes
Solutions
Serious wear of tire
Improper tire pressure
Adjust
Tire noise
Improper tire pressure
Adjust
M-6
Degradation of tire
Replace
Road noise or
vehicle vibration
Insufficient tire pressure
Unbalance of tire
Deformation of rim or tire
Uneven wear of tire
Adjust
Adjust
Repair or
Replace
--
Up-and-down
shaking of steering
wheel
Overbeating of tire and rim
Looseness of wheel nut
Unbalance of tire
Breach or wear of engine bearing
pad
Breach or wear of transmission
bracket rubber
Replace
Lock
Adjust
Replace
Replace
Circular vibration of
steering wheel
Overbeating of tire and rim
Looseness of wheel bolt
Unbalance of tire
Uneven wear of tire
Insufficient tire pressure
Damage or wear of front wheel
bearing
Malfunction of steering system
Malfunction of suspension system
Replace
Lock
Adjust
--
Adjust
Replace
--
--
One side deflection
of steering wheel
Improper tire pressure
Serious or uneven wear of tire
Malfunction of steering system
Malfunction of braking system
Malfunction of suspension system
Adjust
--
--
--
--
Unstable running
Uneven tire pressure of both sides
Deformation of rim or tire
Looseness of wheel bolt
Malfunction of steering system
Adjust
Repair or
Replace
Lock
M-7
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст