JAC Trucks. Manual — part 84

Cooling water level
Check the cooling water quantity, and add cooling water to the standby water
tank for the radiator, if needed. If the water level in the standby water tank is
below "MIN" scale, check the radiator or rest of the cooling system for any
leakage, before adding cooling water up to "MAX" scale.

1. When adding cooling water, its level shall not go above the "MAX" scale in
the standby water tank.
2. Do not take off the radiator injection port cap if not necessary.
3. Check the cooling water level only after the engine cools down.
4. When running in very cold areas, please add anti-freeze fluid of the mixing
ratio corresponding to the ambient temperature, in order to prevent the cooling
water from freezing.

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Durable cooling water(glycol-based)

mix ratio(%)

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JAC High end Light Trucks

Steering wheel
To check the backlash play of the steering wheel, turn the steering wheel right
and left till the tires begin to turn.
The backlash should be in the following range.
Manual steering mechanism: 10-30mm
Power steering mechanism: 10-50mm
At this moment, measure the backlash play along the periphery of the steering
wheel with the front wheels heading exactly forward.

If the truck is provided with power steering mechanism, measure the steering
wheel backlash with the engine running.
Besides, sway the steering wheel right and left or back and forth to see if it is
slack.
During driving, check if the steering wheel is difficult to steer, if it is vibrating or
pulled back to one side, etc.
If some abnormal phenomena are found, such as big gap and slack of the
steering mechanism parts, immediately entrust the specified JAC automobile
service stations to check the steering mechanism.

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Handle travel of the parking brake The normal travel of the parking brake han鄄
dle is: 5-8 notches.
This is the value for pulling back the handle with a force of 20kg.
If the travel of the parking brake handle is more than 16 notches, it means brak鄄
ing is insufficient. The parking brake should be adjusted.

Brake fluid level and clutch fluid level
Check if the level in the fluid reservoir is up to the specified level mark. If the
level in the reservoir is lower than ADD scale, add some more brake fluid rec鄄
ommended.

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JAC High end Light Trucks

Windshield cleaning fluid level
Check if the cleaning fluid level is OK in the pot. And also check if the wind鄄
shield washer functions properly.

Routine maintenance
Air filter
The blocked air filter element will decrease the engine output capacity, but also
increase the fuel consumption and black emissions. So, the air filter should be
under maintenance in the following ways.
Please use the original JAC filter elements when replacing them.

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Filter element removal (behind the cabin)
1. Tighten the butterfly nut and remove the cover.
2. Screw off the butterfly nut that fixes the element before taking it out.
Handle the element with care against any damage.

Filter element removal(behind the cabin)
1. Screw down the butterfly nut and take off the cover.

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JAC High end Light Trucks

2. Screw off the butterfly nut that fixes the element before taking it out.
Handle the element with care against any damage.

Cleaning of the air filter housing and cover Wipe off the dust from the inside of
the air filter housing, the cover and the sealing gasket.

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Wheel cylinder

Venting screw

Locknut

Adjusting nut

Clutch shifter

Master cylinder

Pedal adjusting bolt

Adjusting nut, tightening 1.5~2.5kg.m

3. Filter element treatment
Cleaning of the filter element is done in one of the following methods depen鄄
dent on its contamination.
The filter element is dust contaminated but still dry:
Turning the element with hand, and blow off the dust from its inside with com鄄
pressed air, whose pressure should be below 7kg/cm2.

Clutch pedal adjustment
1. Loosen the blocking bolt or the clutch switch, and adjust the clutch pedal
height to the specified value. 2. Loosen the locknut and adjusting nut of the
follow-up cylinder. Screw down the adjusting nut until it contacts the clutch shift
fork, and then screw it back for one and a half round.
3. Tighten the locknut.
4. Adjust the pushrod length of the master cylinder, to bring the backlash of the
clutch pedal up to the specified value (this needn't be done in trucks provided
with servo mechanism).
5. Adjust the clutch switch gap (L), to keep it within 0.5-1.0mm.

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JAC High end Light Trucks

Clutch pedal backlash and standard height
(1) Backlash: 15-25mm
(2) Height: 205-213mm

Fuel filter
1. Loosen the filter counterclockwise with a filter spanner.
2. Clean the mating surface of the filter bonnet with a piece of cloth, in order to
have the filter installed firmly on the mating surface.

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