Dongfeng EQ1030T47D-820. Manual - part 42

Electric System

EL-2

Fuse Wire and Fusible Link

Fuse wire

If the fuse wire is broken,the problem must be solved before replac-

ing the fuse wire.

Use proper fuse,do not use the fuse with much higher than rated

value.

Insert the fuse box correctly,do not slope it.

Take off the fuse wire of the clock,if the vehicle is not used for long

time.

Fusible link

The melted fusible link can be seen with eyes,if not sure,check it with

a electric measuring device and a check lamp.

Note:

If the fusible link is melted,maybe the key circuit breaks down(power line
or big electric flow circuit).Under such condition,carefully check and
solve the problems.

Battery

Caution

:

Start the engine with supporting battery and the cable if necessary

.please use 12 V auxiliary battery.

After connecting the battery cable, make sure their connection with

the joints is well.

How to maintain the battery

Method of preventing over-discharge

The following precautions must be taken to prevent the battery over-

discharge.

1.The battery surface(partticularly its top)should always be kept clean

and dry.

If there is electrolyte or water on the top, it will cause the battery to

discharge.

2.If the vehicle no used for quite long time, release off the negative pole

joint.

Electric System

EL-3

3.Check the condition of battery charge

Check the proportion of electrolyte periodically, carefully watch the

charge state to prevent over-charging.

Liquid level check

Warning:

Do not let the electrolyte touch with your skin,eyes,and painted

surface.After touching the battery,you must clean your hands thoroughly.If
acid liquid goes into your eyes, skin,and cloth,wash them right away with
clean water for 15 minutes and seek some medical attention. Normally the
battery does not need to add water, but under bad condition, steamed water
needs to be added.

1.Release off the battery plug with proper tools.

2.Add in steamed water until "max".

Sulphation

If battery is not maintained for a long time, the proportion of electro-

lyte is lower than 1.00,and the battery is totally discharged,it will cause
sulfating of the battery pole penal.Although the sulfating battery pressure
is very high at initial charging stage compared with normal battery,its cur-
rent is not even enough smooth, as shown in the picture.

Specific gravity check

1.Read hydrometer and thermometer indications at eye level.

2.When the electrolyte level is too low, the battery can be lilted is raise the

liquid level so the measurement could be taken easily.

Electric System

EL-4

Battery charging

Charging per-fixed current

7.0A can be used for initial charging until average pressure of the single battery reaches to over 2.4V,then

3.0A can be changed for charging. If the pressure change of the battery is not over 0.05 V/h within 2 hours at the
end of charging period,the proportion of the electrolyte does not change obviously,also taking temperature into
consideration,then the battery can be regarded as fully charged.During the whole charging period, the temperature
of electrolyte should be maintained around 20~40℃,taking the middle single battery measuring value as standard.

10.0A can be used for normal charging until average pressure of the single battery reaches to over 2.4V,then

5A can be changed for charging.If the pressure change of the battery is not over 0.05 V/h within 2 hours at the end
of charging period,the proportion of electrolyte does not change obviously, also taking temperature into consider-
ation,then the battery can be regarded as fully charged.During the whole charging period, the temperature of elec-
trolyte should be maintained around 20~40 ℃ ,taking the middle single battery measuring value as standard.

Charging per-fixed pressure

Use fixed pressure 14.80 ± 0.05V for charging,the max. current should not be over 30A(During the initial

charging period ,if the current is over this number,the pressure is allowed to reduce properly).If the pressure
change of the battery is not over 0.1A/h within 2 hours at the end of charging period,the proportion of the electro-
lyte does not change obviously,also taking temperature into consideration,then the battery can be regarded as fully
charged.During the whole charging period,the temperature of electrolyte should be maintained around 20~40 ℃
,taking the middle single battery measuring value as standard.

When there is a lot of bubbles coming out of the battery,and the pressure is stable at the end of charging,the

proportion and the height of the electrolyte should be adjusted to their specified value.

The electrolyte proportion of a fully charged battery is 1.28 ± 0.01(at 25 ℃ ).

Charging System

Note:
When installing the battery,be careful to make the earth pole of the battery same as the engine, which is neg-

ative earth pole, otherwise, diode of the engine will be damaged.

It is not allowed to use way of short circuit (making fire jump from armature B to the body) to check whether

the motor generates power.

It is not allowed to dismount the main powered devices as battery while engine is in high running speed.

Common breakdown causes

Motor not generate power:

Rectifier damaged.

Brush blocked and not touch the sliding ring.

Stator coil cut and short circuited or earthed.

Rotator coil cut and short circuited or earthed.

Motor power not enough:

Motor driven belt too loose.

Individual rectifier damaged.

Brush not connected well.

Sliding ring dirty and damaged.

Rotator coil short circuited.

Battery internal short circuited.

Electric System

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Charging current too big:

Adjusting pressure of adjuster too high.

Battery internal short circuited.

Charging current too small:

Adjuster pressure value too low.

Motor abnormal noise:

Motor not well installed.

Motor bearing worn and loose.

Rotator and stator rub each other.

Coils of rotate and stator cut circuited, diode cut and short circuited and electric appears.

Starting System

Breakdown causes

Motor not running

Battery power not enough severely.

Starting relay not connected.

Armature coil cut and short circuited.

Drive gear shaft blocked.

Magnetic switch touching point burned and oxidized or not well adjusted

Ignition switch damaged or not connected well.

Battery connecting wire not connected well.

Brush wore and not well connected.

Magnetic switch coil cut and short circuited or earthed.

Flexible core of magnetic switch blocked.

Motor with weak running

Battery charging not well.

Motor not well installed with some mechanical break downs.

Rectifier dirty or damaged.

Starter idling.

Single-directed clutch sliding.

Battery connecting wire not well connected.

Brush worn and spring tension reduced.

Armature coil cut circuit somewhere.

Drive gears not well teeth.

Motor not stopping

Ignition switch blocked, touching point not disconnected.

Magnetic switch main touching point burned and sticked.

Starting relay touching point not disconnected.

Flying wheel gear ring and drive gear rough and sticked.