JAC Trucks. Service manual — part 36
66
re-assembly headlight is necessary.
Methods for it: park vehicle on flat
road, put vision screen that paral鄄
leled flat surface of headlight on
place straight ahead ( also using flat
wall) to keep distance of 10m be鄄
tween vision screen and flat surface
of headlight.( figure below)
Adjust and test using measuring cell.
Oppose specified distance to mea鄄
suring cell to check offset distance of
light beam's horizontal and vertical
lighting position from left side, right
side, distance place and nearby
place on screen of measuring cell.
Adjust horizontal and vertical adjust鄄
ing screw
of
headlight.
Adjust
dimmed beam to make the offset dis鄄
tance that left and right light drift to
left and right side(Vleft-Vleft, Vright-
Vright are midpoint) be limited to
100mm.
Small light
Two small lights are embedded on
the two symmetrical corner of front
panel. They should be turned on
when vehicle parks in dark or fog or
when vehicle runs on bright road to
show the position and the width of
the vehicle.
Fog light
Fog light can light further in fog than
other light. They should be turned on
when vehicle runs or parks in fog or
in dark to ensure vehicle can be
seen clearly. Fog light is combined
with headlight.
Ceiling light
The ceiling light is mounted on the
ceiling, and it is combined with in鄄
side rear mirror together. It can light鄄
en the cab, and it can also observe
the condition backward.
Battery
Battery equipped to trucks of this se鄄
ries is aneroid and sealed by a plas鄄
tic case, and it has a big capacity as
well as a light weight.
Use & Note
1. Keep the case clean in case of
discharging to reduce the capacity.
OWNER爷S MANUAL for
HFC1061,HFC1063,HFC1083
series trucks
2. Make sure that the holes on the
upper cap not choked, or the plate
will be damaged by the vapor pro鄄
duced by electrolyzing.
3. The electrolyte level should be
10~15mm higher than the plate. Only
distilled water can be filled into the
battery. Never fill the battery with
fountain or river water, for they will do
harm to it.
4. Check specific gravity and level of
the electrolyte regularly. Do it every
10~15 days in winter, while every 5~
10 days in summer. Specific gravity
is measured with gravimeter. Table 1
shows normal specific gravity of the
electrolyte.
5. The battery should always being
charged. Check voltage of the bat鄄
tery if engine is hard to start. Charge
additionally if it is detected that spe鄄
cific gravity of electrolyte lower than
1.18 ~1.20, otherwise, battery plate
will be vulcanized and it will reduce
lifespan of the battery. Additional
charging should be kept for 13 ~16
hours, and it can take in 1/10 of ca鄄
pacitance into battery. Cut down the
charging current by half after single
cell's voltage reaches 2.4V, and the
charging time should be 3~5 hours.
If the specific gravity of electrolyte
don't rise any more, and this situa鄄
tion keeps for 2~3 hours, it indicates
that the accumulator has been
charged fully. Table 2 shows the re鄄
lationship between temperature and
the corrected specific gravity value
of electrolyte.
6. Protect the joint of terminal post
and wire from dirt and looseness, or
the terminal post will be burnt out. Af鄄
ter tightening the joints, apply a
vaseline coat on the terminal post
that can protect the joints from rust
and loose contact, so that engine
can start easily.
7. If left unused for a long time, the
battery should be removed and pre鄄
served in a place where is dry,
shady, cool, and venrilative. Addi鄄
67
tional charging should be done once
every month.
Local temperature
Specific gravity of fully charged battery
under 15益
Where temp -40益 above in winter
1.290
1援260
Where temp -30益 above in winter
1援280
1援250
Where temp -20益 above in winter
1援270
1援240
Where temp 0益 below in winter
1援270
1援240
Winter
Summer
Where temp -40益 below in winter
1.310
1.270
Table 1 Specific gravity of electrolyte
Measured temp of electrolyte
+45益
+30益
+15益
0益
-15益
-30益
-45益
Corrected value on hydrometer
+0.02
+0.01
0
-0.01
-0.02
-0.03
-0.04
Table 2 corrected specific gravityvalue of electrolyte under 15益
68
OWNER爷S MANUAL for
HFC1061,HFC1063,HFC1083
series trucks
69
sensor
Fuel level gauge sensor.
The fuel level sensor adopts sliding-
resister type. Floaters rise and drop
with the oil level changing, which
causes the resister to connect or
short-circuit to make the electromag鄄
netic fuel level gauge change. Con鄄
nect terminal of the fuel level alarm
lamp with the indicator light to indi鄄
cate the lowest fuel level.
Water temperature gauge sensor
The temperature sensor is a thermis鄄
tor that is mounted in water jacket to
indicate temperature of cooling water
and it matches with the water tem鄄
perature gauge on instrument board.
The water temperature sensor has a
negative temperature coefficient and
its resistance decreases with the in鄄
crease of water temperature, which
change current going by it. Don't re鄄
place the sensor with a positive tem鄄
perature coefficient one, or the water
temperature gauge will not work cor鄄
rectly.
Oil pressure alarm
Oil pressure alarm device is a normal
closed switch. It will be opened
when oil pressure reaches or over
the lowest pressure, so that circuit is
disconnected and indicator goes out.
Vehicle maintenance
71
Notice during breaking -in
period
To improve vehicle's reliability and
economical efficiency and also to
use it longer, follow these during
breaking -in period which is speci鄄
fied as 2000-2500km.
Before breaking-in
1. Clean vehicle with water, and
check all bolts and nuts for tighten.
2. Check the radiator for enough wa鄄
ter, and check engine, transmission,
rear axle, and steering gear box for e鄄
nough lubrication, also check battery
and reservoir for liquid level. Check
all tube conjunction for leakage.
3. Check brake system, driving sys鄄
tem and steering system for correct
operation.
4. Check electrical equipment and
light instrument for correct operation,
and check brake system for normal
air pressure.
5. Check the shift gears for right, the
control parts for normality, transmis鄄
sion for shifting smoothly, and the in鄄
dicator should work well.
6. Check tires for proper air pres鄄
sure..
7. Check if tools and accessories are
taken.
During breaking-in
1. Run new vehicle on flat road and
limit weight of load to 50% and 75%
of rated value separately
Not only will over loading reduce ser鄄
vice life of vehicle, but also it will en鄄
danger running .
2. Speed limit
gear玉
7km/h
gear域
14km/h
gear芋
26km/h
gear郁
40km/h
gear吁
56km/h
3. Check temperature of rear axle,
transmission, steering shaft and
braking drum during initial stage.
Check whether there is abnormal
sound of chassis. Stop running if
finding those problems and rerun af鄄
ter clearing of fault.
4. Both the cooling temperature and
oil pressure should be noticed very
well. Don't drive in high speed and
limit the temperature to 80益-90益.
5. Check cylinder head of engine,
72
OWNER爷S MANUAL for
HFC1061,HFC1063,HFC1083
series trucks
wheel nut, box and steel plate spring
for tighten.. Check steering brake
and clutch for normal operation.
Check steering wheel for free play
and operating stroke.
6. Oil should be replaced after
2500km running ( do it when engine
is hot), then it will be replaced again
in second- class maintenance.
After breaking -in period
1. Replace engine oil and oil filter
core. Replace oil in transmission
case and rear axle, and replace lu鄄
brication in steering fear, also hub
bearing grease.
2. Check all external bolts and nuts
with specified torque.
3. Apply lubrication on all points
where should be lubricated.
Daily maintenance
Shoot trouble immediately if it is
found.
Doing periodic service is necessary.
Vehicle's
maintenance
intervals
should be different due to different
condition of different region. Adjust
service intervals properly referring to
local condition based on relate for鄄
mulation. Notes for maintenance of
chassis are as follows ( seasonal
maintenance is not included).
Daily maintenance
To ensure vehicle a good running
condition, do necessary check after
driving.
1. Check and fill engine with cooling
water and antirusting &antifreezing
compound. Drain off cooling water in
winter. If using antifreeze, drain off it
according to the temperature.
2. Check engine for volume of lubri鄄
cator.
3. Check fan belt for tightening and
damage.
4. Check braking system for operat鄄
ing and check air pressure (or hy鄄
draulic pressure ) for sealing
5. Check steering system for operat鄄
ing. Check bolt and nut for loosen鄄
ing. Check cotter pin for locking up.
6. Check steel plate spring for dam鄄
age.
7. Check tire for air pressure. Check
tire for damage and nut for tighten鄄
ing.
8. Drain off water reservoir daily.
73
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