Dongfeng DFA1101GZ5AD6J-907. Manual - part 63

 

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Dongfeng DFA1101GZ5AD6J-907. Manual - part 63

 

 

Electric and Instrument

EL-8

Trouble analysis

Note:
The self-excitation speed is very low (about 1000r/min) with battery operation. So be sure to see if the charg-

ing indicator is perfect or not during the operation.

Alternator negative earthing.
Be sure to use the original factory's parts as possible if it has to replace the diode.
During the alternator operation, if the temperature of the casing reaches to 105℃+ambient temperature, and

the output of the alternator is normal, the alternator is not burnt down.

Trouble

Cause

Method

Charging indicator does not 
extinguish and the truck 
starts difficultly during 
operation

Short circuit or too large contact resistance

Check the circuit and 

repair or replace the 

damaged parts

Short circuit between the 3 phases and rotor winding and 
casing

Diode damaged

Regulator failed

Charging current is too 
small, the battery is insuffi-
cient. No charging at low 
speed.

Output voltage is over low.

Exclude the trouble 

and replace the dam-

aged parts

Diode is partly damaged

The rotor winding has 1 phase or 3 phases bad contact

Slipping belt

The instrument indicator 
sometimes charges and 
sometimes not

Belt is too loose and slippery.

Tighten the contac-

tors, and replace the 

instrument if it is dam-

aged.

Built-in regulator works abnormally

The contact from engine fire wire connector to battery 
connector is loose

Alternator interior connection is loose.

Instrument failed

Engine has abnormal noise 
during running.

Belt is loose or worn, shaken during running

Adjust the belt, 

replacebearing

Bearing damaged or too large clearance

Too large clearance of bearing caused interference

Electric and Instrument

EL-9

Starting Division

Starter

Starting relay

Assistant start button

The assistant start button is located at the right side of cab rear support. When the engine need to be repaired

under the truck, put the ignition switch to "ON" position and make the ignition relay's contactor pull-in. Let the
transmission in idle position and join up the idle switch. Press the sub-starting button under the truck to start the
starter.

Electromagnetic Main Power Switch

Operation principle

When this switch is turned on, the current passes through the coil and the contactor closed to connect the bat-

tery cathode and chassis frame.

As soon as fuse is burnt the electromagnetic main supply switch will automatically cut off the battery nega-

tive earthed circuit. So there will be no electricity in the complete truck.

Specification

Trouble analysis

Vehicle model

DFA1101GZ5AD6J-907

Nominal voltage (V)

24

Nominal power (kW)

3.7

Pinion teeth

10

Pinion module

2.54/2.1167

Brake torque (N · m)

40

Brake current (A)

800

Brake voltage (V)

12

Operating voltage (V)

18~32

Operating current (A)

50

Pull-in voltage (V)

9~17

Drop-off voltage (V)

1~8

Mode

Nominal voltage

Operating voltage

Operating current

Main contacts current 

in operation

DK238

24V

20~30V

0.5A

300A

Trouble

Cause

Remedy

Jamming

The electromagnetic main supply switch is 
jammed

Slap the housing gently or 
repair

Not working

The electromagnetic main supply switch's interior 
trouble

Repair or replace

Electric and Instrument

EL-10

Exhaust Brake System

The exhaust brake is operative when the foot is removed from both the clutch pedal and the accelerator

pedal; and the exhaust brake switch, clutch switch, accelerator switch and electromagnetic solenoid are all on. But
the exhaust brake will be released when either the clutch pedal or the accelerator pedal is depressed.

Note:
The exhaust brake indicator lamp comes on, which only indicates the exhaust brake switch is ready for

operation, not indicates the exhaust brake is operative.

Electric and Instrument

EL-11

Hazard Warning System

When the hazard warning switch is in the alarm position, the left and right turning signal lamps will flash

simultaneously.

 

 

 

 

 

 

 

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