JAC Heavy truck. Instruction — part 6

8. Measure the stroke made by the push red of the brake chamber when the

brake pedal is depressed all the way. Verify that the stroke is up to specifica鄄

tions given in the following table if it is out of specification, adjust with the

worm shaft.

Standard stroke of brake chamber push rod

9. Turn the wheel in the forward direction by hand and depress the brake

pedal to stop rotation of the wheel. Turn the wheel to check for dragging. With

slight foot pressure on the brake pedal, turn each wheel by hand to check that

the front wheels are slightly lighter to turn than the rear wheels or there is not

great difference and that right and left wheels are about equal.

10. As a final step, install the dust plug. Operate the vehicle at a slow speed

and perform brake tests to check for brake performance, uneven braking and

other troubles.

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ENGINE OIL LEVEL

Position the vehicle on a level surface. The best time to check the oil level is

before operating the engine or about 30 minutes after stop of engine.

The checking procedure is as follows:

1. Wipe the level gauge 1 well with a cloth, insert it into the level gauge guide

2 and remove the gauge to check the oil level. The oil level should be between

"FULL' and "LOW" inscribed lines.

CAUTION:

If the oil level is checked when the engine is stopped before sufficient rise of oil

temperature, the detected level will be lower than the actual level, because

some oil accumulation in the engine does not flow back into the oil pan.

2. If the level is Iow, add engine oil through the

filler cap 3. After addition of

engine oil, allow more than six minutes and then recheck the oil level.

3. If a badly contaminated engine oil is obvious when checking the oil level,

replace the engine oil irrespective of the service intervals.

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OIL FILTER

●

The engine oil and filter should be changed at those intervals specified in

the maintenance schedule. If the car is being driven in severe conditions,

more frequent oil and filter changes are required.

●

If the filter is blocked the warning light is on and if the oil pressure is low

the buzzer sounds at the same time. Replace it independent of the mileage.

●

An element assembly cannot be reused.

Replacement of filter type

1. Put an empty container below the oil filter drain hose. Remove the air

bleeding plug and drain the engine oil out.

2. Disassemble the case by pulling the center bolt on the oil filter out and re鄄

move the element.

Use the genuine parts when you assemble. Replace the element and rub

packing of the case simultaneous. Apply engine oil on the rub packing before

assembling. Tighten the center bolt with specified torque 5.5±0.5 kg.m.

3. When you replace only the oil filter replenish the engine oil.

4. Crank the engine and check the oil leakage and the oil level later.

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CAUTION

Be very careful when draining the engine oil as it may be hot enough to burn you.

Dropped oil may cause a fire. Wipe and clean each part in the engine room.

Replacement of cartridge type

If the filter is blocked, the warning light is on when the RPM is high.

Replace it independent of the mileage

If the oil pressure decreases the warning light also is on ant the buzzer sounds simultaneous. But the parking brake is

applied on it does not sound.

1. Put an empty container below the oil filter and remove the drain plug. Drain the engine oil out.

2. When the draining is finished pull the oil filter out with a wrench.

3. Use the genuine parts when you assemble. Assemble the rub packing on top of the filter after applying the engine oil

on.

4. When you replace the oil filter replenish the engine oil.

5. Start your engine. Check whether the oil leaks. The checking should be done before driving and after.

CAUTION

Split oil may cause a fire. Wipe and clean each part in the engine room.

Never reuse the filter assembly.

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WINDSHIELD WASHER FLUID LEVEL

Check to ensure that windshield washer fluid is at a proper level.

Operation of wipers

●

Push the knob to check that the windshield washer fluid is sprayed at the

correct position.

●

Turn the lever and check the wipers for proper operation.

NOTE:

Be sure to operate the windshield washer before the wipers are operated.

Do not operate the wipers on dry glass,

This can result in more rapid wear of the wiper blades and may scratch the

glass.

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TURBOCHARGER

Principle of turbo charger operation

Turbo engine is a device that produces more power by supplying sufficient air

into the combustion chamber by using the energy of exhaust gas is usually

wasted in the general engine.

The exhaust gases are accelerated in the turbine housing and directed onto

the turbine wheel to turn it.

This spins the compressor wheel, which results in the intake air being forced

into the engine cylinders.

As the intercooler is installed that improves the fuel economy and power of the

engine, while reducing harmful exhaust gases to a minimum.

Intercooler

The intake air compressed by the turbocharger increases to 170~C and as a

result, power of the engine is limited by engine overheated. The intercooler

cools the heat. This improves the combustion efficiency and as a result, it in鄄

creases that the fuel economy and power of the engine, while reducing harm鄄

ful exhaust.

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Precautions while operating

1. Check the oil level and oil pressure

Before starting the engine, measure the crankcase oil level. As soon as the

engine starts, check oil pressure indicator for nor mal rise.

2. Warm the engine up

After the engine starts, avoid sudden acceleration or sudden start.

Enough RPM is needed before starting engine until the engine is warm for 3 to

10 minutes.

3. No staring suddenly and No accelerating heavily

If you accelerate heavily, start suddenly or when you turn off the engine sud鄄

denly it may damage to the engine and turbocharger parts.

CAUTION

●

If running a vehicle without air cleaner filter, foreign material drawn can de鄄

stroy engine and turbo charger.

●

When you turn off an engine suddenly may damage bearing, hi-speed rota鄄

tion part of turbo charger inside, so let the engine run at idle for sufficient time.

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BATTERY INSTRUCTIONS

Check the battery fluid level and specific gravity at regular intervals.

CAUTION:

●

The battery generates highly Inflammable gases.

Take special care not to use a fire or produce sparks near the battery.

●

The battery fluid contains sulfuric acid.

In case of contact with the skin or clothes, immediately wash away with a large

amount of clean water and seek medical help.

Cleaning of battery terminals

1. Clean the battery terminals if they are stained or corroded. If there is white

powder on the terminals, wash with hot water.

2. Remove and polish the terminals with a wire brush or emery paper if they

are markedly corroded.

3. Apply a thin coat of grease to the terminals after cleaning and tightening.

NOTE:

The terminals must be firmly tightened. Before cleaning the terminals, make

sure the caps are installed securely to prevent foreign matter from entering the

battery.

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Fluid Quantity

The fluid level should be between the "UPPER' and "LOWER' level lines. If the

level is low, add distilled water up to the 'UPPER' line.

NOTE:

If your battery has only one level line, the line indicates the "LOWER" level

(lowest).

If your battery has no level line, the fluid level should be between 10 and

15mm above the plates.

If the level is low, add distilled water until it is 15mm above the plates.

NOTE:

After addition of water, be sure to charge the battery (by operating the vehicle),

because otherwise the fluid could be frozen in winter.

Specific gravity

Measure the specific gravity. If it is less than 1.220 (at a fluid temperature of

20~C), recharge the battery.

NOTE:

The standard specific gravity of battery is 1.260 to 1.270 (at a fluid temperature

of 20~C).

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REPLACEMENT OF FUSE

If the electrical system is out of order, open the cover and check for a blown

fuse in the following sequence.

1. Open the cover.

2. Remove the circuit checker from the reverse side of the cover.

3. Insert the female terminal of the circuit checker into 'CHECKER' ground ter鄄

minal and touch the male terminal to the fuse top surface.

4. If the lamp lights, the fuse is good.

The headlamp circuit should be checked with the head light switch at lighting

position.

5. Replace the defective fuse.

CAUTION:

●

Use of a fuse out of specification or wire could be

dangerous. Be sure not

to use a substitute fuse. Make sure that a blown fuse is replaced with a gen鄄

uine fuse. If a defective point cannot be located, have inspection made at your

nearest service shop.

●

Do not pour water over the relay and fuse box. Do not put your foot on the

box or kick it. When the inside of the cab was cleaned with water, remove the

water completely through the drain hole in the floor and then tilt the cab.

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CENTRALIZED LUBRICATION SYSTEM(If installed)

C.L.S (Centralized Lubrication System) is the device to lubricate a proper quantity of grease into all major chassis parts

(except propeller shaft) automatically at regular interval of time through an exclusive lubrication pipe with a control unit

during driving.

Inspecting & Replenishing Grease

Pour grease to the MAX remarked on the reservoir tank.

●

Inspect or add grease every 2 months

●

Recommended grease: NGL 100,000

CAUTION

●

When the grease is poured into the reservoir tank it must be a pure thing.

●

Replenish grease through the exclusive lubrication inlet to avoid entering foreign material.

NOTE

Lubricate instructionly with pressing the instruction lubrication switch beside the timer as required especially in rainy time or af鄄

ter washing a vehicle. Lubricating interval has specified 6 hour when the vehicle is delivered. Do not necessary to adjust

again.

CLS Inspection

●

Pour grease into the reservoir tank. Turn the ignition key to the ON position and push the instruction button.

●

Check the operating condition of the pump. If it is normal open a plug on the end of the fractionator. The pump

should be operated continuously until the grease is flowed.

●

Turn the main switch off after bleeding air completely from the main pipe and then lock the plug.

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●

Turn the battery switch on for 15 seconds and off for 5 repeatedly and then check whether the grease lubricates.

●

Check the indicator lamp is off when the pump is operated.

CAUTION

Do this procedure once a day before driving.

NOTE

●

The auto grease indicator light is turned on at the same time with operation of the pump, and after 3 seconds the light

is off. The pump is operated for 154 seconds at one time.

●

If the auto grease indicator light is illuminated continuously even after 3 seconds there is a malfunction in the CSL.

Have the CLS inspected and repaired by an authorized JAC dealer.

CAUTION

●

Turn the main switch off after having the pump worked for 154 seconds although the lamp is off after 3 seconds nor鄄

mally.

●

Inspect the tightening condition of leak age of the conjunction part and grease line.

Management of CLS

●

Check that there is the grease lubricated at a necessary part around the refueling hole and leaking grease at con鄄

necting part of thelubricator and fractionator, periodically.

●

Wash the grease container with benzene or mineral oil. Never use trichloroethelene or equivalent solvent.

●

Maintain the main switch is OFF when the vehicle is not working for a long time.

●

If you work the CLS when the tank is empty, it may be damaged. Inspect frequently.

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TIRE ROTATION

Tires should be rotated every 8,000 km (5,000miles). If you notice that tires are

wearing unevenly between rotations, have the car checked by a JAC dealer so

the cause may be corrected.

After rotating, adjust the tire pressure and be sure to check wheel nut tight鄄

ness.

NOTE:

●

Do not mix biss-ply and radial-ply under any circumstances.

●

In ace double rear wheel, the difference of outer diameter between outer

wheel and Inner wheel Is less than 12mm.

DOUBLE REAR AXLE

1. Front tire

2. Rear front tire

3. Rear reartire

Spare tire

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PRECAUTIONS BEFORE HIGH SPEED OPERATION

The higher the vehicle speed, the more heat the tires generate, and eventually

there is a danger or a burst.

The heat generated by the tires varies greatly with the tire pattern, tire inflation

pressure, load and speed. Pay attention to the following points.

●

Keep the tires inflated at normal pressure.

●

Avoid overloading.

The lug type pattem tires are not suited for high speed operation, as they tend

to skid. If your vehicle is equipped with the lug type tires, care should be tak鄄

en not to operate it at very high speed.

Exercise special car when controlling the steering wheel or applying brakes on

a wet road surface.

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TROUBLESHOOTING

Refer to the following causes when the vehicle fails, and fake the corrective action as soon as possible. If the causes

can not be founded out, have the vehicle checked and repaired by an authorized dealer.

When the starter switch is in 'S' position, engine doesn't start.

Starter does not rotate at all or rotates slowly.

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Engine stalls when speed is reduced

Engine overheating

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Starter rotates but engine does not start

Low torque

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poor exhaust emissions

Excessive fuel consumption

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Excessive engine oil consumption

Engine oil pressure does not rise

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Steering wheel and vehicle make abnormal vibration

Hard steering

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Run-down battery

Lamps do not light

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TRACTOR

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Note

：

When charging air, with鄄

draw complete vehicle parking

firstly and then charge the air

into trailer through this connec鄄

tor.

Note

：

When connecting spring pipe to trailer, connect pipeline to trailer firstly, and

then put the switch valve handle to

“

ON

”

. When separating trailer from tractor, put

the switch valve handle to

“

OFF

”

firstly, and then disconnect pipeline.

Charging seam for con鄄

necting traitor gas cylinder

Control seam

for

connect鄄

ing traitor

service brake

Switch valve

handle

OFF

ON

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Control state

（

seen picture below

）

Tractor adopts separate trailer brake hand brake valve, its function is: auxiliary

brake the trailer by controlling separately, especially for complete train running

on ramp to lighten impulsion from trailer and make train decelerate calmly as

well as increasing stabilization when braking.

Loosen trailer brake hand brake valve handle to make handle return automati鄄

cally.

Note

：

Check clearance of friction plate on trailer brake periodically, alternate friction

plate on trailer brake when friction plate is abrased badly and influence corre鄄

sponding nature of complete vehicle brake.

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Trailer cable device includes trailer light cable assembly and trailer ABS assembly.

Cable is fixed on plug, and trailer light cable is used to control light and signal on

trailer.

Interface for light

cable on 7p trailer

Stationary point for

light interface

Interface for ABS

cable on trailer

Stationary point for

ABS interface on

trailer

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MIXER

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ⅠMain structure brief introduction and working principle

JAC concrete agitating and transportation truck is modified based on the 2nd category chassis from south Korea Gerfa,

its mainly used for the pre-mixing concrete delivery to the mixing station accordingly, delivery time is less than 1.5h, de鄄

livery range is about 60km around the mixing station, the vehicle schematic is as follows:

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1. 2nd category chassis

；

2. water supply system

；

3. agitating tank

；

4.feed system

；

5. output system

；

6. operation system

；

7. frame system

；

8. hydraulic drive system

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1. Agitating tank

Agitating tank body is the main part of the concrete transportation truck, it consists the tank body, guide tank, vane and

assistant vane. The funneled guide tank assures the feeding properly, the curve vane helps to output performance of

lower landslide level concrete, there are holes on the vane, which reduces the adhering of the concrete. The assistant

vane with the agitating ability helps to improve the pre-agitating concrete quality. The whole agitating tank is mounted

above the bracket; there are two supporting rollers in the rear. The checking hole on the agitating tank is for easy repair.

2. Transmission system

The transmission system gets the power from the original engine, namely the power is output after get through the en鄄

gine and chassis, and then power is transmitted to the variable volume plunger hydraulic pump through the universal

joint. The fixed volume plunger motor is driven by high pressure oil of the hydraulic motor, then the hydraulic motor for鄄

wards the power to the reducer and drives the tank in clockwise or counterclockwise, then feeding, agitating or output is

realized. The output flange of the reducer can be turned within±6?, which compensates the axial movement of agitating

tank and assures the drive of agitating tank is not affected by the distortion during the driving.

3. Hydraulic system

Hydraulic system is open type, it main consists hydraulic pump, reducer, high pressure pipe, low pressure pipe and oil

return pipe etc. There is instruction servo adjustment handle on the hydraulic pump, the hydraulic oil flow and direction can

be adjusted, which controls the turning and revolution speed of agitating tank. The clockwise and counterclockwise ro鄄

tary of the agitating tank is able to get stepless speed adjustment.

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4. Control system

The rod type control mechanism is arranged in three locations, one in driving

cab, the other two in the rear, it incorporates the soft shaft control in the driv鄄

ing cab, it's for locking the direction of agitating tank to assure the agitating of

the agitating tank during driving; the two sides in the rear are connection rod

control system, turn the handle, and it drives the adjustment handle of the hy鄄

draulic pump and the engine accelerator pedal to adjust the volume and di鄄

rection of the hydraulic oil, then the feeding and output of the agitating tank is

under control; the soft shaft control is on the left of the driving cab, it's simple

and flexible and easy to operate.

Connecting rod type (operation)

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Soft shaft type (operation)

5. Frame

The frame is composed of auxiliary frame, front bracket and rear bracket etc

components. The auxiliary frame connects with the chassis frame, there is

supporting roller and feeding equipment bracket.

6. Feeding and output equipment

Stuff feeding and output consists feeding funnel, output funnel, stuff collecting

trough, adjustment handle etc. The stuff collecting trough can be turned hori鄄

zontally within 180? and the height can be adjusted from the vertical direction

for different working conditions. The lock mechanism on it can be fixed and

locked to keep the safety driving.

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7. Water supply system

It adopts air pressure water supply or water pump supply, the water supply system consists the water tank, ball valve,

water pump, squirt gun, water pipe etc, it's for swashing the inner vane of the agitating tank, feeding and output groove,

also it can be used for washing vehicle. In addition, it can be used for adding water to the tank during agitating as well.

Air pressure type water tank

Water pump supply water tank

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