JAC Truck HFC1061-1063-1083. Service Manual — part 1

Use of instruments and ap鄄
paratus in the cab

Integrated switch and instru鄄
ment cluster

Integrated switch

(figure below),

which is composed of steering shaft
lock seat尧ignition start lock and
combination switch lies underneath
the steering wheel.

Ignition switch
Ignition switch is on the right side of
integrated switch. It has four func鄄
tions: LOCK尧ACC尧ON尧START. When
the key is on the 'LOCK' position,
the ignition switch has been connect鄄
ed to the power source and lockup
of the steering gear has been disen鄄
gaged. Turn the key to 'ACC' posi鄄
tion clockwise, and circuit of acces鄄
sories like radio and tape player is
connected. Turn the key to "ON' po鄄
sition, and the instrument circuit is
connected. If keep on turning the key
to 'START' position, engine can be
started. You should unlash handle of
the key immediately after the engine
starts. The key can return to "ON'
position by the action of spring.

Combination switch (left control han鄄
dle)
Combination switch is under the
control of the multifunctional handle,
which lies in the lower left and inferi鄄
or place of the steering wheel. It can
control small light尧headlight尧head鄄
light dimmer and left turning or right
turning by two different motion
modes. The symbols and functions of

integrated switch

Ignition switch

2

Ignition switch

Integrated switch

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

the combination switch are as fol鄄
lows:

荫

"OFF" indicates that neither small

light nor headlight lights.

荫

is the indication of small

light. Turn the control handle clock鄄
wise by 30o to lighten the front尧rear
small lights and the instrument light .

荫

is the indication of head鄄

light. Keep on turning the left control
handle clockwise by 30oto lighten
the front headlight尧the rear small
light and the instrument light .

荫

is the indication of steering.

Forward and backward motion of the
control handle can operate the left

and the right turning lights and the
turning light indicator on the instru鄄
ment panel. Push the control handle
forward in horizontal direction, the
right turning light lights and there is
indication of turning right on the in鄄
strument panel. On the other hand,
pull the control handle backwards,
the left turning light lights and there
is indication of turning left on the in鄄
strument panel. If the control handle
is in the middle position, there will be
no indication of turning.

荫

Dimmer of headlight: Lift the left

control handle upwards gently and
do the "uplift-release" motion, which
can control the dimmer function of
the headlight. If uplifting the handle
once, high beam headlight lights; if

releasing the handle, it goes out. Re鄄
peating of the above action can con鄄
trol the working condition of the high
beam headlight to achieve the pur鄄
pose of dimmer function when over鄄
taking at night.
Combination switch (right control
handle)

荫

is the indication of syringe.

When the washer control button on
the top of the control handle is
pressed, cleaning mixture (antifreeze
should be used in winter) in the win鄄
dow washer which lies in the right
doorframe and underneath instru鄄

right control handle

left control handle

3

ment panel can be spouted to the
windshield glass through the spout
under the window.

荫

is the indication of wiper.

Turning the control handle clockwise
in horizontal direction can control the
wiper. Turn the control handle clock鄄
wise by 12o to the 'LO' position, the
wiper works at a low speed. Keep on
turning clockwise by another 12o, the
wiper can work at a high speed.
When the control handle is on the o鄄
riginal position, the wiper will be dis鄄
connected or return automatically.

荫

is the indication of exhaust

throttle assistant braking. Lift the
right control handle upward and do
the 'uplift-release' motion. Uplift the
handle, the switch can be connected

and the indicator light on the instru鄄
ment panel lights which shows that
exhaust throttle assistant braking
works. If the accelerator pedal or the
clutch pedal is depressed, the ex鄄
haust assistant braking will be can鄄
celled automatically and the indicator
light on the instrument panel goes
out.
Other electric appliance switches
Other electric appliance switches
mainly include horn button, danger
warning switch, fog lamp switch and
gating ceiling light switch.
1. Horn button is in the center of the
steering wheel. When the button is
pressed, it can hoot.
2.

is the indication of danger

warning switch. If the button is

pressed, the front尧 rear尧 left尧 right
turning lights flash at the same time
and send out emergency signal for
alarm indication. If pressed again,
reset signal of the switch is discon鄄
nected.
3.

is the indication of the fog

light. Press this button, the fog light
lights. Press it again, the switch re鄄
sets.
4. Ceiling light signal indicates
whether the door of the vehicle is
shut closely or not. If one door keeps
open or not shut closely, the ceiling
light will light to remind the driver.

4

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

5

Danger alarm and fog lamp switch

Other electric appliance switch

Instrument cluster

New pattern of instrument cluster (air brake)

Indicator lamp

Water temper鄄

ature gauge

fuel gauge

Air pressure

gauge

Mileometer

Speedometer

Tripmeter

Old pattern of instrument cluster (air brake)

Mileometer

Speedometer

Fuel gauge

Indicator lamp

Button for returning to zero

Water temperature gauge

Tripmeter

Air pressure gauge

6

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

New pattern of instrument cluster (hydraulic brake)

Old pattern of instrument cluster(hydraulic brake)

Speedometer

Fuel gauge

Indicator lamp

Mileometer

Button for returning to zero

Tripmeter

Water temperature gauge

Electrical clock

7

Indicators :
1. Turning indication light (

)

when the turning control handle is on
the left (right) turning position, left
(right) turning indicator light will flash.
If the warning switch is pressed, the
left and right turning indication light
will flash at the same time.
2. High beam indication light (

)

indicates that whether the headlight
is under the working condition of
high beam . When the headlight is
on the high beam status, the
indicator light will light.
3. Fuel warning lamp (

):used for

fuel level alarm, when fuel is in
shortage, fuel alarm light will light.
4. Parking brake indicator light渊

冤院

when pulling up the parking brake
handle, the indicator light will light.
5. Generator indicator light渊

冤院in

dicates the working condition of
generator. When the battery is
discharged, the indicator light will light;
otherwise, the indicator light will go out.
6.Oil pressure indicator light渊

冤院

indicates low - pressure warning of
engine oil pressure. When oil
pressure is lower than 0.08-0.1Mpa ,
the oil pressure indicator light will
light. When oil pressure is higher
than it, the oil pressure indicator light
will go out.
7. Braking fault indicator light渊

冤院

when braking fluid is not enough, the
indicator light will light..
8. Exhaust assistant brake indicator

1. turn left
2. high beam
3. tur right

4. fuel alarm
5.parking brake
6.charging

7. oil pressure alarm
8.braking fault
9.exhaust assistant brake

10.fog lamp
11.small light

8

Integrated cluster

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

light 渊

冤院when exhaust assistant

braking operates, the indicator light
will light. When exhaust assistant
brake is disconnected, the indicator
light will go out.
9. Fog light indication light 渊

冤院

press the switch to make it work.
10. Small light indicati0n light渊

冤院

When they work袁the indication light
will light.

Use of components in the
cab

Cab

Brief description of the structure:
The driver cab is constructed
enclosing with full metal. Window
glass adopts panoramic camber
windshield. In order to improve the
comfort, side panel with larger
upside width and raised -roof cab
have been adopted. Therefore, the
interior space of the cab can be
more commodious and comfortable.
Effective measures have taken in
reducing noise尧 heat insulation尧
sound insulation and sealing. For
instance, the section of roof forehead
is enclosed and strengthening rib is

equipped on the roof. There are
three

asbestos

heat

insulating

mattress on the upside of the engine.
Sealing of the door is double skin
constructed. For safety, softening
has done for the main parts, which
can appear knocking easily with
passengers.

Air -conditioner system (choose
to pack)

Brief introduction
The automobile air -conditioner with
cold and warm machine is integrated
with automobile cluster panel. It has
many useful functions. For example,
to make cold air, warm air and to
remove frost. The air -conditioner
system has four high and low
grades, which meets your need of

9

choosing different air speed and
direction of air sending.

Operation
1. Start the engine.
2. Press Switch 4 of the air condi -
tioner to start air sender. The switch
has four grades from left to right to
make the air speed more and more
quick as well as making air stronger
and stronger.
3. Operate air-conditioner Switch 5,
then the compressor begins to work

and the whole system works too.
4. When using cold wind, please put
the Temperature adjusting handle 3
to the COOL position. When using
warm wind, put it to the HOT
position.To have air sending from
different directions, please adjust
Handle 2. To use warm wind only,
please close Switch 5 of the air -
conditioner.
5. Operate Handle 1 on natural wind
conversion position to have natural
wind outside come into the cab.

10

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

Caution!
1. Avoid putting the handle to the
coldest position and pressing the
air speed switch on the lowest
position when using the air -
conditioner in order to prevent
evaporative machine from frosting.

2. Do not park the vehicle under
the sun .
3. Close the door and windows of
cab when using air-conditioner.
4. Use compressed air and cold
water to wash the condenser. (hot
water and steam are forbidden)
5. Have the compressor worked
for 5 minutes once a week in
winter to maintain the air condi -
tioner work normally.
6. Make sure the temperature of
water used to cold the engine reach
to 70益above when using air heater
and you should use antifreeze fluid
to avoid freezing radiator and inside
of air heater to be cracked.
7. If you do not understand the
structure and have no measures of

The top of cab's ventilating device

You can choose two ways to
ventilate the cab. Outdoor airiness
and indoor airiness
Outdoor airiness
1. Clockwise the rotary-knob on the
top of cab to make sure the top cab
closed.
2. Turn on the switch to "IN", then
turn on the rotary knob to "OPEN".
Indoor airiness
1. Clockwise the rotary knob to close
the ventilator louver.
2. Turn the switch to "out "which is on
the exhaust gear.

Door

1. The cab door, which has three -
step opening, can improve the
convenience for passengers to get
on or to get off. The partial opening
angle can be 30益 and 57益 . And
the full opening angle can be 90益 ,
on all of the three positions, the door
can be in stable condition. (figure
above)

Outside door handle (left) Lock of
door locking(right)
Pull out the outside door handle to
open the door. Insert the starting
switch key into the door lock and

11

protection, please do not switch
on the system of air conditioner to
avoid accidents

rotate it to lock the door.
2. The door can be locked outside
without the key. First press the lock
button on the inner side of the doors
to the fixed position, then pull the
outside door handle outwards and
close the door at the same time.
3. Pull out the inside door handle to
open the door.
4. Press the lock button to lock the
door after closing it.

Cab seat

Cab seat can be classified as driver
seat, assistant driver seat and rear
row seat. Driver back seat adopts
upright seat. The angle of backrest
and the fore-and-aft position of seat
can be adjusted. The maximum
adjustable angle of the backrest is

56益.The maximum adjustable dist-
ance of the seat is 160mm.

When vehicle is in the progress of
maintenance, please clean the track
assembly of the driver seat, recoat
the lithium base grease, and tighten
all of the joint nuts again. If finding
the sliding track shaking or blocking,
it should be repaired or be replaced
with components.

Cab tilt lock mechanism

cab tilt locking device

12

1. chuck rod

2. overturn rod

3. safe locking
hook

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

Brief introduction of the structure:
The cab has turnover functions with
turnover

and

lockup

system.

Turnover system is composed of
torsion bar, supporting -axle, cab's
rear bracket and so on. The cab to
turnover is used by torsion power.
Lockup system is composed of right/
left lock unit, turnover lock unit, short
pull rod, long pull rod, rear bracket
of cab and so on .All of these are to
lock the cab too tightly and to make
sure the vehicle turnover automati -
cally when driving in any situation.
Please read the tilting notes on the
left door of the cab and on the upper

flange of the wheel seriously before
tilting the cab. The notes are shown
in the figure above.
Use and maintenance
In order to tilt the cab and run the
vehicle safely, please pay attention
to the following contents.
Cab tilting method and relative
notices.
1. When stopping the vehicle on the
horizontal road, you should make
sure that there is enough space
around the cab before tilting. Or else,
the cab may be damaged while
tilting.
2. Pull up the parking brake, push
the shifting rod into the neutral
position to avoid the self -sliding of
the vehicle.

3. The cab door must be fastened
up. You should take away all the
goods on the instrument panel尧seat
and floor to avoid the damage of the
door and the front windshield.
4. Disengaged the locking function of
the cab locking mechanism at first
when tilting the cab.
5. After the locking function diseng-
aged, hold the tilting rod with hand
and pull up the safety lock hook at
the same time to avoid the sudden
uplift of the cab.
6. Raise the cab slowly until it tilts to
the highest position, then lock it
carefully with lock arm on the rear
bracket.
7. When lowering the cab down, first,
hold the tilting rod and disengage

13

Notice

the locking function of lock arm on
the rear bracket, then lower the cab
down slowly. After the safety lock be
locked, fasten the locking mech -
anism.

Inspection and maintenance
1. Check periodically the rubber pad
assemblies which are used to
strengthen the front尧rear support, if
found damaged, it should be
replaced instantly.
2. Check periodically the locking
situation of the locking mechanism, if
found not work, it should be repaired
or replaced immediately.
3. If it is difficult to tilt up the cab and
put it down, the torsion rod cannot
work. Replace the torsion rod.
4. When repairing the chassis, before
removing the cab, disengage the
force of the torsion rod and operate
with the following steps.

荫

Disengage the locking state, and

tilt up the cab to the highest position.

荫

Remove the shaft pin connected

the rear support rod and the
baseboard support of the cab.

荫

Push the cab forward to some

angle until the bolt on the torsion rod
arm can be loosened.

荫

After the bolt removed, the torsion

rod cannot work. Now the cab can
be removed ( The torsion rod can not
be pulled out).

5. Before reverting the cab to the
original position, return the force of

14

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

Note: The mentioned above work
must be done by three persons
at least because two or three
persons cannot push the cab
forward after the force of the
torsion rod disengaged.

the torsion rod and operate with the
following steps:

荫

Put the tooth part of the spline

which is cut at the bottom on one end
of the torsion rod in alignment with "1"
position on the support axle tube and
the spline tube, and insert the torsion
rod into the support axle tube ( for the
rod which is pulled out).

荫

After mounting the cab with

support axle tube and the left尧 right
bracket together to the frame, put the
"1" of hub splines on the torsion rod
in alignment with the spline tooth
which is cut at the bottom on the
other end of the torsion rod, cover
the hub splines on the torsion rod
and insert the spline axle tube into
the right bracket in the cab.

荫

Tilt the cab forward until the bolt

hole on the torsion rod arm aimed at
the screwed hole on the right bracket
in the cab, screw the bolt and tighten i.

荫

Put the cab down slowly, and

check whether the cab is on the
state of suspending in the horizontal
direction after dropped down. If it
works normally, lock the cab.
6. If finding the torsion rod not work,
referring to (4)(5) when replacing it.

Starting and running of the
vehicle

Starting of the vehicle

Starting of the engine
After making preparations for starting
engine, first, put the shift bar on the
neutral position, turn on the ignition
switch, then check horns尧instruments
on the instrument panel尧turning
lamps尧braking lamps尧the angle and
position of the rear view mirror.
1. Routine start
Turn the key to the START position ( As
shown on the right figure), the engine
can start. After starting, loosen the
accelerator pedal immediately and
keep the engine working in low speed.
Pressing

the

accelerator

pedal

15

violently is forbidden.
2. Start in winter
When it is very cold, referring to the
following measures to start engine.

荫

Use hot water to take the place of

cooling water, turn on the drainage
switch when heating the water. When
the hot water flow out and the engine
body become warm, close the
drainage switch.

荫

Heat up the oil up to 80益耀90益,

and then add it into the oil pan.
After starting the engine, check the
operating state of the engine and
instruments at different rotating
speed. Especially check the oil
pressure. Check whether there is
leakage of water尧oil and gas,
whether the oil level is normal and
whether there is noise coming from
the engine as well as checking
whether the color of exhaust is
normal.
3. After starting the engine, do not
press the accelerator pedal violently,
loosen the accelerator pedal to keep
the engine operating on idle for some
time. After the temperature of engine
rising and the engine operates

stably, uplift the clutch pedal slowly.
4. Usually run the vehicle after the
temperature of engine rising to 60益
and the operating (sound) of the
engine

and

the

reading

of

instruments are normal. Do not run
the vehicle in low temperature to
avoid wearing the engine.
Starting and shifting of the vehicle
After engine operates normally, press
the clutch pedal, shift into low gear,
loosen the parking brake, and press
the horn once. Make sure that the
vehicle can be operated safely,
loosen the clutch pedal slowly and
depress

the

accelerator

pedal

properly at the same time to start the
vehicle. After starting the vehicle, the
foot should be went away from the

16

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

17

clutch pedal. Do not keep the foot on
the pedal to avoid the burning out of
the clutch friction disc.

When shifting, do not just see the
shifting rod .You should watch
forward and hold the steering wheel
steadily with your left hand, having
the hollow of the palm of your right
hand stick to the top of the shifting
rod and push or pull it to the right
position with your right wrist.

Running, swerving, turnaround, bac -
king and braking of the vehicle
1. Running:
Keep enough distance to the
foregoing vehicle when running on
flat road. Select vehicle speed
according to the vehicle model,
mission and concrete condition of
road, generally select the speed of
50-70km/h.
Let the vehicle run in the first or
second

gear

when

starting,

upgrading under heavy load and
running on bumpy road or on the
road with obstacles. But the vehicle
cannot be run in the first or second
gear too long. When upgrading with
heavy load, shift the shifting rod into
low gear to avoid overloading of the

Note: Do not let the vehicle run in
the first or the second gear for a
long time to prevent from increasing
the

wearing

and

the

fuel

consumption. Loosen the clutch
pedal rapidly or depress the
accelerator pedal insufficiently, the
engine can stop.
When running the vehicle, shift the
gear according to the change of
road and landform. If finding the
engine power abundant and the
rotating speed rises, it illustrates
that the primary gear is not
appropriate, the vehicle should be
shifted to the next fast gear in time.

After shifting, if not finding shortage
of power and

chattering of trans-

mission, the shifting operation can
be considered right. For safety,
when swerving, passing bridge
and meeting, the vehicle can run
in moderate speed. If the running
condition is better, the vehicle can
run in high speed so as to make
the speed higher and economize
the fuel.

18

engine.
When running, do not increase or
decrease the vehicle speed abruptly
and do not shake the steering wheel
without reason, listen whether there is
abnormal noise or not, check the
reading and indicator lamp of all the
instruments for normalization. If
finding abnormal noise or abnormal
events, stop the vehicle immediately
and check it, take necessary
adjustment and repair.
When downgrading, do not stall the
engine. When downgrading steep
ramp, shift the shifting rod into low
gear and take braking operation at
intervals to avoid the over speeding
running
When running across a shallow river

or loblolly, prevent the water from
entering into air intake lines of the
engine, rear axles and transmission
case. Check rear axle and trans -
mission case for entering water after
padding. If there is water, drain off it
and add specified quantity of gear
oil. The vehicle should not run at a
high speed after padding, brake
pedal should be depressed at
intervals to resume the braking
performance as soon as possible.
When running on icy or snowy road,
run at steady speed. Do not take
emergency braking and do not turn
the steering wheel fiercely to avoid
skidding danger. Keep long safety
distance from the foregoing vehicle.
When running in heavy rain, drive the

vehicle more carefully to avoid
decreasing the braking performance
of the brake because of moist. Do
not take emergency braking opera -
tion to avoid the danger of skidding .
2. Swerving
Swerving of the vehicle produces
centrifugal force which can be bigger
when the vehicle speed becomes
higher. The force can bring turning
over in the transverse direction in
serious condition. Therefore, in the
50 -100 meters position before
swerving, you should ring the horn,
turn on the turning lamp and reduce
on the freezing and muddy road or in
the weather of heavy rain, fog, wind,
sand and reduce the vehicle speed
to less than 10km/h, swerve the

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

19

vehicle solely alongside the right
side of road. When swerving, turn the
steering wheel uniformly according to
the situation of road, the swerving
track should be transited smoothly ,
the turning motion should not be too
great or too small. Do not turn or
return the steering wheel suddenly.
Try your best to avoid taking braking
operation while turning the steering
wheel, especially emergency braking.
When steering, if found skidding of
the front wheels, put up the
accelerator pedal and turn the
steering wheel properly along the
skidding direction, and correct the
running direction after the skidding
stops.
3. Turning around院

When turning the vehicle around by
180益 , select the square, large -
scale crossing or flat broad which
have little traffic flux and turn around
the vehicle at a time along the
running direction. At the 50 -100
meters position in front of the turning
spot, reduce the vehicle speed, shift
into low gear and send out turning
around signal.
When turning around with running
forwards and backwards , send out a
turning around signal at first, reduce
the vehicle speed and run towards
the right side of road . When
approaching the preset spot for
turning around, observe the situation
of road, turn the steering wheel to the
left extreme position rapidly and

have the vehicle run to the left side
of road slowly. When approaching
the roadside, return the steering
wheel rapidly. After observing the
situation behind the vehicle , start
and turn around vehicle, turn the
steering wheel to the right extreme
position at the same time. When
approaching the roadside, return the
steering wheel rapidly and stop the
vehicle. If the turning

around

operation can not be done for once ,
repeat the operations above.
4. Backing 院
The operation of shifting into reverse
gear or shifting from reverse gear to
onward gear can be done after the
vehicle stopped completely. After
shifting into the reverse gear, the

20

back -up light lights. The vehicle
speed must be less than 5 km/h
when backing. If the driver cannot
discern the situation behind the
vehicle because the vehicle is
loading or because of other reasons,
the backing operation must be
commanded by one person who is
not in the vehicle. Do not back the
vehicle without commanding.
5. Parking of the vehicle and stop of
the engine.
When preparing to park the vehicle ,
the vehicle speed reduces or the
vehicle slides out of gear and
indicates with turning light. After the
vehicle parked. Pull up the parking
brake rod . If the vehicle must be
parked on the road for some

reasons, park the vehicle near the
roadside and do not park the vehicle
on the running lane. Under the
exceptional condition like breaking
down in the middle of road, two
caution plates should be placed on
the position of 200 meters in front of
and behind the vehicle.
Avoid parking on the ramp. If the
vehicle must be parked on the ramp,
pull up the parking brake rod to the
extreme position, shift into low gear
and block the vehicle with triangular
chocks or stones to prevent it from
sliding. Note: Make sure that the
parking brake can work when
parking on the ramp at the same
time, turn on the emergency warning
signal indicator light.

After parking, especially after the
engine operates with heavy load, do
not stall the engine immediately, and
keep the engine operating in low
speed for several minutes. After the
temperature of water decreases to
less than 70益 , vehicle is going to
stop.
When parking midway in winter, take
the heat preservation and anti freez鄄
ing measures for the engine. Prevent
the oil tank from isolation in summer.
After the vehicle runs, routine service
and inspection should be done on
the entire vehicle噎噎

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

21

Engine

Air inlet and air exhaust
systems

Inlet system includes air inlet pipe
assembly尧 air filter 尧branch pipe of
air inlet. Air exhaust system includes
exhaust pipe尧 muffler and exhaust
tailpipe etc.
Using and maintenance
1. Service life of engine has the clos鄄
est relationship with the working
condition of air filter. It is forbidden to
use the engine without air filter or
with air filter that cannot work. Taking
the air inlet port of air filter as the ini鄄
tial air inlet port is also forbidden.
2. Check the inlet manifold and ex鄄
haust manifold for every 1000km run鄄
ning.

荫

Check nuts for looseness, when

tightening the nut on the inlet and
exhaust manifold, the torsion force
should be equable, or else the air
leakage can occur.

荫

Check the inlet and exhaust mani鄄

fold for crack and hole, check the
gasket for damage and erosion, if
finding those phenomena, replace it
with a new one.
Air filter
The function of air filter is to filtrate
out the dust and the sand in the air
entering into the engine.
Air filter is cyclone dust gathering air
cleaner with paper filter element. Af鄄
ter external air entering into the air fil鄄
ter through the air entering into the
air filter through the air inlet pipe,

22

The signboard of engine

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

Note院The details of the engine
structure尧 assembling尧 adjust鄄
ment尧 using and maintenance can
be consulted in the operating
specification of relevant engines.
Note: there is a signboard of en鄄
gine on the top or on the side of
the cylinder. Marked with model of
engine, serial number when leav鄄
ing the factory, date when leaving
the factory, demarcated rotational
speed etc. please find the exact
position so as to use and repair our
product.

23

larger dust particle can be separated
from the air by the function of cy鄄
clone vane, then can be thrown into
the dust gathering plate, the sepa鄄
rated air keep on moving and enter
into the cylinder by the filtering func鄄
tion of the paper element.
For every 1000km running , check
and maintain the air filter. When run鄄
ning in the condition of excessive
dust, the running mileage interval for
inspection and maintenance should
be shortened suitably.
Cleaning of the air cleaner:
1. Remove the dish shaped nut from
the covering lid. Get the filter element
after opening the covering lid.
2. Clean the covering lid and inside
of the outer covering with clean and

dry cloth. When cleaning , do not let
the water enter into the filter element.
3. Clean the dust unloading valve to
make sure it isn't worn and can
work.
4. Check whether the rubber tube
connected to brake is tight or not
and close it tightly .
5. Clean the filter element of the filter.
Use compressed air gun to remove
the dry dirt or dust (air pressure
should be less than 690kpa), remem鄄
ber to blow from inner side to outer
side of the filter element to clear
away the dirt or dust . Patting or
knocking are forbidden.

Cooling system

Brief description of the structure
Cooling system adopts closed wa鄄
ter-cooling pressure cycle type. It is
composed of radiator尧cooling fluid尧
thermostat尧fan gear尧connection hose
etc.
Maintenance of cooling system
1. It' s recommended to use long -
term effective antifreeze preservative
liquid of glycol base as cooling fluid.
In the north, it can avoid damage to
the engine due to solidification of
cooling fluid in winter; in the south, it
can increase the boiling point of
cooling fluid in summer to avoid
damage to engine due to air resis鄄
tance in high temperature.
2. Every time before driving, check

24

the liquid level in the radiator, if the
liquid is found insufficient, it should
be added to specified level.
3. Drainage of cooling system. In
cold region and in winter, for long -
time parking or finishing using the
vehicle everyday without using anti-
freezing preservative liquid, the cool鄄
ing system must be drained and the
water filler cap of the radiator must
be opened to avoid the incomplete
drainage of cooling water.
4. After engine operating for a long
time , furring can be produced in the
cooling water and it should be
cleaned in time .Clean it with the fol鄄
lowing method: mix 700 -800gram
kerosene, add the mixture liquid into
the cooling water , run in medium

speed for 5 -10 minutes, then after
engine stop working for 10-12 hours,
restart the engine and run for 10-15
minutes. Then drain the cooling sys鄄
tem with cleaned water.
Items in using long-term effective an鄄
ti-freezing preservative liquid
1. Choose suitable antifreeze accord鄄
ing to the lowest temperature of the
region, if the lowest temperature of
the region is -25益 , antifreeze of
which solidifying point is -30益
should be chosen.
2. Anti-freezing preservative liquid of
the same type should be used in
adding in case of deposition.
3. If finding deterioration of the anti-
freezing preservative liquid, replace
it entirely at once. Normal color of the

anti-freezing liquid is green or blue,
if the liquid is deteriorated, the color
will become deep red because of in鄄
filtration of impurity.
Adjusting of tension degree of fan belt
pulley
1. Too tight or too loose fan belt does
no good to operate the engine .
Consult engine assembly for details
of adjusting methods.
2. Adjusting methods: Adjust the fan
belt with adjusting bolts first, then do
accurate adjusting with the tension
rod; adjust degree of tension of the
V -belt with fingers, press each belt
with 98N force. Length of crankshaft
belt pulley-belt tension pulley is 10-
15 mm and length of belt tension pul鄄
ley-fan belt pulley is 7-8mm.

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

25

Brief description of the structure:
Accelerating transmission device is
composed of accelerator pedal
mechanism尧 accelerator drawing wire
and speed governor handle of the en鄄
gine. (As shown in the figure above)
When pressing the pedal, driving
device of the mechanism pulls the

drawing wire and controls the open鄄
ing extent of the accelerator to in鄄
crease or decrease the speed
1. Accelerator pedal mechanism:
This mechanism adopts the latest
structure of ISUZU truck. It operates
simply and safely and is connected
to the accelerating drawing wire and

the hand throttle drawing wire; struc鄄
ture of the pedal adopts injected
molding type, which makes the as鄄
sembly convenient and causes little
operating noise.
2. Accelerating wire drawing:
It is operated with soft drawing wire
and has a safe structure; it's char鄄
acterized with convenient layout尧 lit鄄
tle frictional resistance and stable
transmission.

Hand throttle
1. Braking pedal bracket
2. Manual throttle drawing wire
3. Accelerator drawing wire
4. Accelerator assembly
5. Accelerator pedal assembly
6. Acceleration oscillating arm
of the engine
7. Frame

Schematic diagram of accelerating transmission device

Accelerating transmission system

26

3 Manual throttle drawing wire:
Using with the foot throttle can quick鄄
en the preheating of the engine or in鄄
crease the idling speed.
Using and adjustment
1. Check the chucking position of the
linkage rod and the accelerator
mechanism for rightness and reliabil鄄
ity, check the direction of the wire
drawing for straight and check on
the cornering for smooth transition.
2. The pedal should be depressed
easily and to the extreme position
without jamming. When released, it
should return freely.
3. When pressing the pedal, if the
free play is too large or the opening
degree of the accelerator is insuffi鄄
cient, adjust the position of bolts.

Fuel supply system

Brief description of the structure:
Fuel supply system is composed of
fuel tank尧 fuel filter尧 fuel pump尧fuel
injection pump尧 fuel inlet pipe and
fuel return pipe.
The function of the fuel supply sys鄄
tem is to inject specified quantity of
diesel well atomized into the cylinder
regularly with definite interval of in鄄
jection and under definite pressure
according to engine -operating re鄄
quirement as well as making the
diesel mix with the air well and
rapidly. Operating state of fuel sup鄄
ply system has great influence on
power and economic performance of
the engine.

Rough filter: fuel supply pipe is
mounted with DX15OT type spin-on
precipitator. Its flow volume is 1.5L/
min. It can filter big foreign particles
and can separate oil from water.
Fuel tank: oil filler is mounted with fil鄄
tering screen so as to prevent big
foreign particles from entering into fu鄄
el tank. The lowest position of bottom
of fuel tank is mounted with oil bolt to
clear the deposit and water away.

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

27

Using and maintenance of rough fil鄄
ter:
1. Check the chucking position of
pipeline interface for sealing ,reliabil鄄
ity and air leakage.
2. Check DX150T type precipitator
for water -proofing maintenance for
every 1000km or 200hs'working . It's
unnecessary to change the filter ele鄄
ment.

Chassis

29

Clutch

Brief description of the structure:
The clutch equipped for this series
truck is single -plate dry type di鄄
aphragm spring clutch. Clutch facing
is composed of two friction discs and
clutch facing riveted with rivet.
Clutch pressure plate presses friction
discs on pillar by using pressure
produced by diaphragm spring to
produce jointing force.
Adjustment of the clutch operating
system:
1. Adjust the limit screw of the clutch
pedal to make sure that the free play
of the pedal is 3耀5mm.
2. Adjust the master cylinder of the
clutch: Loosen the locknut on the
push rod of the master cylinder, ro鄄

tate the end of the push rod to con鄄
tact gently with piston of the master
cylinder, then rotate the push rod for
3/4 circle in the contrary direction,
tighten the locknut of the push rod,
and the clearance
between the push rod and the piston
is about 0.5耀1mm.
3. Adjust the clutch release pump:
rotate the adjusting nut on pump's
push rod and have the clutch release
finger touch the clutch release bear鄄
ing. Then rotate adjusting nut in the
contrary direction and make the free
play of clutch release fork reach to
2-3mm. Tighten the nut at last. Part
of the vehicle model use clutch
booster. Adjust the free play of the
rocker arm end on clutch release fork

to 3-5mm
4. Bleed air from wheel cylinder of
the clutch
Air or oil leakage in the hydraulic
pipeline of the clutch is not allowed,
or else, it can result in the disability
of the pedal, deficiency of the effec鄄
tive travel and incomplete release of
the clutch etc., which make the
clutch not work normally. The work of
air bleeding should be completed by
two persons . One person presses
the clutch pedal and the other
bleeds the air.

30

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

31

Take off the rubber cap of the air
bleed screw on the wheel cylinder,
link a plastic pipe on the air bleed
screw, put the other end of the pipe
into the container filled with brake
fluid, press the clutch pedal for sev鄄

eral times, fill the master cylinder and
hydraulic pipeline with brake fluid,
then loosen the air bleed screw. Air
bubble can be puffed from the oil
ring if there is air in the pipeline. Be鄄
fore the pedal reaches the floor,
tighten the air bleed screw. Repeat
the operation mentioned above until
there is no air bubble releasing.
Maintenance and adjustment of clutch
Long time use or incorrect adjust鄄
ment and incomplete air bleeding of
the clutch can cause incomplete re鄄
lease of the clutch and make the
clutch in half contact state for a long
time, which aggravate wearing of the
clutch pressure plate and friction lin鄄
ings. Decrepitating, burning and ex鄄
foliation of the friction lining, and

burnout of the release bearing can
even result in the abnormal operation
of the clutch. When doing mainte鄄
nance, all kinds of clearances of the
clutch must be adjusted. When doing
class -three maintenance, clean the
master pump and distributor pump
and liquid reservoir tank, filling the
new lubrication into the inside of re鄄
lease bearing.

1. release fork

2. dust cover

3. copper washer 4. release cylinder
5. wrench

6. soft plastic pipe

7. container

8. braking

Transmission

Transmissions equipped for the
chassis of this series of truck are
LC5T97, LC5T30, LC6T46. Among
these, LC5T97 and LC5T30 are man鄄
ual fixed axle with stages. There are
five forward gears and one back
gear. The second, third, fourth and
fifth gear has synchronizer that is
synchromesh. The first and back
gear are constant mesh. Transmis鄄
sion uses synchronizer to make gear
shifting convenient. It can reduce
wear and tear of tooth and shock,
prolong the life of gear linkage, short鄄
en the time of gear shifting , improve
the average vehicle and reduce labor
intensity etc.
Gear shifting of transmission is

worked by transmission gear shifting
control mechanism, controlled by
long-distance soft shaft and rod.
Shifting control device of transmis鄄
sion.
Shifting control device of transmis鄄
sion is controlled by long -distance
soft high -floor short rod, using two
flexible shafts to choose and shift
gear. It is composed by control bar
base assembly and gear selecting/
shifting and prop stand. The inner
core shaft of flexible shaft is steel
wire rope. Gear selecting /shifting is
accomplished by steer wire rope's
pulling and pushing motion. The ball
on the flexible shaft and adjusting
screw are used for adjusting the total
length of the flexible shaft to ensure

the gear selecting/ shifting can be
completed. There are marks of the
transmission, which is shown in the
figure below.
Control handle of transmission
Schematic diagram of the transmis鄄
sion gear shift control device

32

OWNER爷S MANUAL for

HFC1061,HFC1063,HFC1083

series trucks

Using and maintenance:
1. If finding the gear shifting cannot
operate or operates difficultly when
the engine is not working, it shows
that the gear shifting rod (or the flex鄄
ible shaft) has maladjustment or the
bolt becomes loose, now you must
adjust the control rod (or the flexible
shaft), check and tighten every bolt
and every nut.
2. If finding out-of -gear when run鄄
ning on the rough road, the control
rod (or the flexible shaft) has malad鄄
justment, and it should be adjusted
correctly.
3. If finding free play of the control
rod is too large, check and tighten
every bolt and every nut.
4. Do not take gear shifting operation

33

1. gear shift control rod
2.dust cover
3. handle
4.floor of the cab
5. flexible shaft for gear selecting
6. transmission rocker arm for gear selecting

7. side bracket for gear shifting
8. flexible shaft for gear shifting
9. fixed bracket of the gear shifting flexible
shaft
10. rear cover of the clutch
11. transmission rocker arm for gear shifting