JAC S1. Service manual — part 15

correct position of engine oil before
drain,and then loosen the drain plug.

4. After the engine oil has been
completely drained, tighten the drain
plug clockwise.
5. Remove the oil filter. It should be
removed with hands (if you feel slip鄄
pery, try to take it off with a piece of
cloth). A certain amount of engine oil
may flow out when the filter is re鄄
moved. Therefore, align it with a
container below.
6. Install the new oil filter. Never over
tighten it, keep the contact surface

clean, and completely remove old
washers. Before fitting, apply clean
engine oil onto the sealing washers
of the filter.
7. Fill the engine with oil of qualified
grade and check the level.
8. Start the engine and check for any
oil leakage at the drain plug or oil filter.
9. After the engine has reached the
normal water temperature, stop it
and check the oil level again.

Inspection and replacement of en鄄
gine cooling liquid.

Note:
音 When it is necessary to add

engine oil, use the oil with quali鄄
fied grade. It is recommended to
store the engine oil in a sealed
container, and buy it from a gas
station. Never pour the oil onto
ground or discard it with other do鄄
mestic rubbish.

Maintenance by vehicle owner

114

Warning院

音 Take care when draining the
engine oil, to avoid scalding by
hot oil!

Warning院

音 Persistent skin contact with
used engine oil may lead to
cancer. Wash the skin with soap
and clean water, and protect
your skin.

Warning院

音 Never open the water tank
cap when the engine is hot. The
pressure in the cooling system
of engine may force the cooling
liquid out. Failure to observe this
advice may result in serious
scalding accident. Therefore,
never open the water tank cap
when the engine is hot.

Engine cooling liquid

Use an ethylene or ethylene glycol
cooling liquid with water at a mixture
ratio of 50/50. The engine cooling
liquid should be compatible with the
parts of aluminum alloy engine. Nev鄄
er use additional inhibitor or additive.
The cooling system should used en鄄
gine cooling liquid with correct con鄄
centration and anti-freezing and an鄄
ti-corrosion performance.
Do not use a cooling liquid solution

with concentration exceeding 60% or
below 35%. Using such cooling liq鄄
uid may damage the cooling system.
Refer to the table below for filling or
replacing engine cooling liquid, and
adjust the mixture ratio as appropri鄄
ate.

Check the cooling liquid level

The cooling liquid level can be seen
on the side of the plastic cooling liq鄄
uid tank. The level should be be鄄

tween the "L" and "F" lines. If it is be鄄
low the "L" mark, cooling liquid
should be added. If the standard lim鄄
it is still not reached, check for pos鄄
sible water leakage. If the level
keeps on decreasing, have it
checked by a JAC dealer and find
out its cause.

Replace engine cooling liquid

Replace engine cooling liquid as per
the maintenance schedule.

Protection 益

Mixing ratio

Cooling liquid

solution

Water

-15

30%

65%

-25

40%

60%

-35

50%

50%

-45

60%

40%

115

Replace spark plug

You will find it very easy to replace
the spark plugs with the engine cold.
Replace the spark plugs one by one,
to avoid confusing the wires.
1. Remove the intermediate cover of
the engine swing hood.

2. Clean the dirt deposited around
the spark plug with a piece of clean
cloth, to prevent dirt from entering
the cylinder when the spark plug is
removed.
3. To remove the HV wire, pull out
the connector directly instead of the

cable. Pulling out the cable may
damage the carbon cored conductor.

4. Operate the spanner on the upper
part of the spark plug to remove an
old spark plug, and never damage
the ceramic insulator.
5. Turn the spanner anti-clockwise to
remove an old spark plug.
6. To install a new spark plug, oper鄄
ate the spanner on the upper part of
the spark plug and never damage
the ceramic insulator.

7. Push the isolated connector onto
the pole, and replace the HV wire.
Check the HV wire for complete
breaking and never drop a HV wire.

Replace air filter

Note:
音 It is recommended to have the
authorized JAC dealer replace the
spark plugs.

Note:
音 The spark plug should be fully
fastened.Excessive tightening may
damage the aluminum alloy cylin鄄
der head. Also, loose spark plug
can cause overheating of spark
plug and damage the engine.

117

Warning院

音 Replacement of spark plug
must be done with the engine
cold. An excessively hot engine
may result in scalding.

1. Park the vehicle on a level ground,
apply the parking brake and open
the cooling liquid tank cap.
2. Get a drain container and open
the drain tap of the cooling liquid
tank. After all cooling liquid has been
drained, tighten the drain tap.
3. Refer to relevant instructions for
details about the volume of cooling
system of your vehicle. Add appro鄄
priate amount of cooling liquid as per
the manufacturer instructions. Now

add demineralized water until it tops
up to the filling port of the cooling liq鄄
uid tank.
4. Start the engine with the water
tank cap opened. If cooling liquid
needs to be added, add the liquid.
5. Check and close the water tank
and the tank cap, and check that the
drain tap has been completely closed.

Replace spark plug

The spark plug must be replaced as
per the period required in the mainte鄄
nance schedule, or when the engine
performance requires such replace鄄
ment. Traces of unqualified spark
plugs installed include engine fire in鄄
terruption during driving, increased
fuel consumption, and slow acceler鄄
ation.Use the spark plugs recom鄄
mended by JAC dealer for replace鄄
ment of spark plugs. Using other
spark plugs may deteriorate the ve鄄
hicle performance,interfere with radio
frequency or damage the engine.

Caution:
音 The engine cooling liquid
may damage the protection lay鄄
er of your vehicle. If it has been
spilled onto the vehicle, wash it
with clean water.

Note:
音 Pure and qualified parts must
be used for replacing spark
plugs.

Maintenance by vehicle owner

116

Warning院

音 The cooling fan is controlled by
the engine cooling liquid tempera鄄
ture, and can be operated when
the engine does not run. Take
care about safety when working
near the cooling fan. When the
cooling liquid temperature has re鄄
duced, the fan will stop operating
automatically. This is normal.

Replace the air filter as described
below:
1. Release the clamps around the fil鄄
ter cover.
2. Now, the filter cover can be lifted,
to take out the old filter and put in
the new filter. It is recommended to
use genuine JAC filter.

Windscreen wiper liner

Check the wiper liner from time to
time, and clean off road dirt or other
debris accumulated on it. To clean
the wiper liner and wiper arm, use

clean sponge or cloth, mild soap or
detergent and clean water. If the
wiper continuously scratch or foul the
windscreen replace it with one of
JAC origin.

Top the spray liquid tank with
liquid

音 The spray liquid tank supplies the
spray cleaning device of windscreen
with spray liquid.
音 Ensure the quality of spray liquid
and top the tank. During bad weath鄄
er or the spray device is used fre鄄
quently, the spray liquid level should
be checked frequently.
音 The volume of the spray liquid
tank is 3.4 liters.

Caution:
音 Driving your vehicle without
fitting a suitable air filter may re鄄
sult in increased wearing of the
engine.

Caution:
音 Never run the wiper with the
glass dry, as this will seriously
damage the wiper liner and
scratch the windscreen.

Maintenance by vehicle owner

118

Inspect the gearbox (manual)

It is recommended to use the pure
JAC product (API GL -4) for the
gearbox oil.
Oil amount in manual gearbox
The amount of oil in the manual gear鄄
box is 2.3 liters.

Inspect the level of manual
gearbox oil

Turn off the engine and park the ve鄄
hicle on a level ground.
1. Turn the filling port plug anti -
clockwise with a proper spanner and
open it with your fingers.
2. Feel the oil level inside with your
finger. The oil level should be in the
middle. If not, check if there is oil
leakage before adding oil. To fill the
gearbox again, oil should be added

to an appropriate level. Never add
too much oil.
3. Replace the filling port plug and
screw it on with your fingers, and
then tighten it with a spanner.
Inspect the brakes

Caution:
音 Never use the radiator an鄄
tifreezing liquid (engine cooling
liquid) in the spray device, as
this will damage the protection
layer of your vehicle.
音 Never operate the spray de鄄
vice without spray liquid, as this
may damage the spray liquid
pump.

Caution:
音 Brakes are very important to
safe driving, therefore it is rec鄄
ommended to have the JAC
dealer inspect the brakes. The
brakes shall be checked for
wearing as per the maintenance
schedule.

119

Warning院

音 Check the gearbox oil level
after the engine has cooled
down whenever possible. If the
engine is hot, take care to avoid
scalding.

Inspect braking liquid level

Braking liquid

It is recommended to use the hy鄄
draulic braking liquid in conjunction
with "JG4". Refer to the relevant in鄄
structions on the container.
Inspect the level
The braking liquid in the braking liq鄄
uid tank should be inspected peri鄄
odically. The level should be be鄄

tween the "MIN" and "MAX" marks on
the side of the tank. If the level is at
or below the "MIN" mark, add brak鄄
ing liquid to the "MAX" position.
音 Never fill up excessively.

Inspect clutch liquid
Inspection method of clutch liq鄄
uid

To service the engine hood, it is nec鄄
essary to inspect the clutch liquid
level of the general braking pump.
The system should also be checked

open over the specified time peri鄄
od. This can prevent damage to
the brake system by intrusion of
dirt and moisture.

Maintenance by vehicle owner

120

Warning院

音 Braking liquid spilled into your
eyes may affect your sight. Use
qualified DOT3 or DOT4 braking
liquid. Never leave the braking liq鄄
uid reservoir or braking liquid tank

Warning院

音 Refer to the contents in Cau鄄
tion when measuring the braking
liquid level.Braking liquid spilled
into eyes may cause sight dete鄄
rioration. It can also damage the
paint and braking liquid is not
readily removable.

for possible oil leakage. Check and
confirm that the clutch level is be鄄
tween "MAX" and "MIN". Add a suit鄄
able amount of clutch liquid as re鄄
quired. Decrease of level means
leakage existing in the clutch system,
and a timely inspection should be
made to identify the leaking position
and have it repaired. Consult your
JAC dealer for detailed repair
method.

Replace braking liquid

The recommended JG4 braking liq鄄
uid should be used.
The cap of braking liquid fluid
reservoir must be tightly closed, to
prevent dirt and moisture from enter鄄
ing.

Maintenance of air conditioner
Keep the condenser clean

Check periodically the air condition鄄
ing condenser (and engine radiator)

for accumulated dirt, dead insects
and leaves. They may affect the
cooling effect. Take care when
cleaning such objects to avoid being
trapped into the cooling fan.

Inspect the driving belt of air
conditioning pump

When the air conditioner is in normal
use, the air conditioning pump driv鄄
ing belt tension should be checked
once a month. To check the tension
of this belt, press the belt in the mid鄄
dle between the engine crankshaft
and air conditioning pump pulley.
The deflection must not exceed
8.0mm when it is pressed with a fin鄄
ger. The deflection may approach
8.0mm (0.315 ft) when measured
with instrument at a pressure of 98N

Note:
音 Never allow other liquid to
contaminate the braking liquid.
This may render the system
functioning abnormal.

121

Warning院

音 Refer to the contents in Cau鄄
tion when measuring the braking
liquid level. Braking liquid spilled
into eyes may cause sight dete鄄
rioration. It can also damage the
paint and braking liquid is not
readily removable.