Xinchai 490B Series Manual page 30

4.4 Adjustment of Starting Motor
The voltage of starting motor is 12v, power is 2.5kw. It is electro -magnetically
controlled and mechanically driving. When starting an engine, put on the main switch and
press down the start push button, and the engine will start to work. If it fails to start, wait
till the starting pinion returns to its original position and stands still before trying the
second time.
1尧 Before using the starting motor, check the engine, starting system circuit and the
charging situation of the battery.
2尧 Normally, engine can start in just one attempt. The time used to start the engine each
time should not exceed 10 seconds. The time interval between 2 consecutive tries
should be longer than 1 minute. It's prohibited to restart the motor while the engine
and motor are still moving, otherwise severe crash will happen between pinion and
ring gear. After the engine start to work, loose the push button at once and let the
pinion return to its original position.
3尧 If the engine still fails to start after several attempts, do not try again before the
trouble has been got rid of.
4.5 Adjustment of Generator
1尧 Don忆t disconnect the wire from its terminal when the engine is running.
1尧 Not be confused with the polarities.
2尧 Use compressed air to clean out dust from inside the generator after long time
operation.
4.6 Expelling Air from Fuel System
When the engine is working, air can enter the system under the following
circumstances:
1尧 Drain out fuel from the fuel tank when the engine is still working.
2尧 Low pressure fuel pipe or return pipe is broken or a joint hasn't been tightly fixed.
Once the air enters the fuel system, it should be expelled before the engine begins to
work.
Take steps as follows:
1尧 Open vent plug of fuel filter, and operate the hand delivery pump till there is no air
in the fuel flowing out the vent hole. Tighten the vent plug again.
2尧 Open vent plug of injection pump, and operate the hand delivery pump till there is no
air in the fuel flowing out the vent plug. Tighten the vent plug again.
4.7 Maintenance of Air Filter
1尧 The intake air quality is closely related to the working environment and the size of air
filter. If there is too much dust, relevant measurements should be taken.
2尧 The maintenance periods should be adjusted according to the actual situation.
3尧 Relevant detail clean method and maintenance periods should be taken according to
the requirement of the vehicle.
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