Zontes ZT350T-D, Руководство по обслуживанию, Страница: 131 / 152

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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. D350
front tire pressure: 240kPa (34.8 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.
Replacement of the front shock absorber
Caution:
●After the front wheel is disassembled, please do not press
the brake handle.
●Be careful not to damage the ABS coil when disassembling.
●When disassembling the front fender, be careful not to
scratch the shock absorber or the front fender.
●When removing the shock absorber, first remove the 2
bolts that fix the same shock absorber, remove one side of
the shock absorber, and then remove the other side.
1. Disassemble the front wheel and front fender
assembly
a. Refer to "Replace the front wheel" to remove the front
wheel.
b. Remove one M6 with 5 # hexagonal socket × 30 bolts
(1), take out the pipe clamp and gasket
⑸
. Remove one M6
with 4 # hexagonal socket × 12 Bolts (3). Use 8 # hexagonal
socket to remove 2 M10 × one point five × 60 bolts (2),
remove the front brake caliper.
c.Use 4# inner hexagon to remove the two M6×14 bolts
⑷
on the left and right sides of the front fender; then use 5#
inner hexagon to remove one M6×30 bolt
⑴
, take out the
gasket
⑸
.