Zontes ZT310T-M, Руководство по обслуживанию

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2. Front wheel oil seals and bearings
2.1 Service life of front wheel oil seals and bearings
Under normal circumstances, the bearings and oil
seals in the front axles need to be inspected within
50,000 kilometers, but the bearings and oil seals in the
front axles need to be inspected according to the actual
conditions of the vehicle’s driving conditions and the size
of the load. Into the oil seal and bearing, the fine dust in
the water will accelerate the wear between the bearing
and the oil seal. At the same time, the mixed friction of
water and grease becomes an emulsion and loses the
original lubricating effect. This also shortens the service
life between the oil seal and the bearing. When the
following conditions occur, the front wheel oil seals and
bearings should be checked in advance
a. Abnormal front wheel noise when riding.
b. When the direction bar shakes left and right when
riding.
2.2 Replacement method of front wheel oil seal and
bearing
a. Remove the front wheel assembly by referring to
"Replace the front wheel".
b. Use a flat-headed batch to lift out the oil seals on
the left and right sides of the front wheel, check whether
the oil seals are damaged or deformed, check whether
the outer ring of the bearing fits tightly with the rim, and
if there is no abnormality, turn the inner ring of the
bearing by hand to check whether the bearing rotates
smoothly and if there is a jam. If it is astringent or
abnormal sound, the front wheel bearing and oil seal
need to be replaced.
c. The replacement of the front wheel oil seals and
bearings must be completed by a professional
maintenance organization.
d. If there is no problem in the inspection, apply an
appropriate amount of lubricating grease on the front
wheel bearing, and then press-fit the oil seal to the
original position with a suitable size iron rod and rubber
hammer.
e. Reinstall the front wheel assembly.
3. Front wheel rims and tires
3.1 The service life of the front wheel rim and tire
Generally speaking, rims do not have the limit of
service life and kilometers, but if the following situations
occur, the rims must be replaced.
a. The rim is deformed or warped.
b. Cracks or breaks in the rim
Under normal conditions, the front tires can be used
for about 20,000 kilometers. Normal conditions mean
that the road conditions are not bad and there is no tyre
puncture. Because the tires are made of rubber, there
will be aging. Generally, the tires need to be replaced in
about 4 years. If you don't change it, you need to check
frequently to check the tire aging and whether there are
cracks in the tire. If the following conditions occur, the
tires must be replaced.
a. The tire has been repaired many times.
b. When the tire tread wear reaches the limit position
of the design.
c. There are many aging cracks in the tire.
3.2 How to replace the front wheel rim and tire
a. Refer to "Replace the front wheel" to remove the
front wheel assembly.
b. Take the removed front wheel assembly to a
professional organization and use a tyre raking machine
to take out the tires.
c. Use a lifter to assemble new rims or new tires. And
the front tire pressure is charged to the standard value.
Front tire pressure: 2.5kPa (0.4 PSI)
d. Put the assembled front wheel assembly back on
the vehicle.
3.3 Dynamic balance
The wheel is a whole composed of tires and rims. Due
to manufacturing reasons, the mass distribution of each
part of the wheel may not be very uniform. When the
wheel rotates at a high speed, it will form a dynamic
imbalance state, causing wheel jitter during driving. ,
The direction of the shaking phenomenon, in order to
avoid this phenomenon or eliminate the phenomenon
that has occurred, it is necessary to make the wheel in a
dynamic situation by increasing the counterweight
method to make the wheel correct the balance of each
edge part, this correction process Is what we call
dynamic balance.
The dynamic balance particles of the wheels can
ensure that the wheels are more stable when rotating,
reduce vibration and shaking, improve the stability and
comfort of the vehicle, and are conducive to safe driving.
a. Please go to a professionally qualified organization
to test the dynamic balance after each replacement of
the front and rear wheels.
b. The balance weight must be attached to the
designated plane (red area) of the rim.