MAINTENANCE MANUAL OF GW4D20/GW4D20B TURBOCHARGED DIESEL ENGINES
112
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
The electromagnetic switch
doesn’t work after
the starting switch is turned to the
―ST‖
position
Turn the starting switch to the
―ST‖ Position and
check whether there is a voltage at the
electromagnetic switch terminal
―S‖
Yes
No
Check the earthing
cable
Check
whether
the
instrument
indicator lamp is normal
Check whether the
connection between the
starting switch and the
electromagnetic switch
terminal
―s‖ is on
Proper
Improper
Normal
Abnormal
Repair it
Open circuit or connection
malfunction between the
storage battery and the
starting switch.
The slipping part of
pinion cannot move
Open circuit or
burnout of the
electromagnetic
switch or the coil
Check the
starter relay
Connection
malfunction of
the starting
switch
Repair it
Replace the
starting switch
Repair or replace the
starter
The engine cannot work after the pinion is
engaged in the gear ring
Check the
clutch and
starting switch.
Check the earthing
cable
Improper
Proper
Repair or replace the
earthing cable
Connection
malfunction between
the electric brush and
the rectifier
Burnout of the
electromagnetic
starting switch
Open circuit or
damage of the
excitation coil
Open circuit or
damage of the
armature coil
Slipping
pinion clutch
Repair or replace the
starter
Or
