Operating Instructions
3.17.2 Faults and Troubleshooting Methods of Electrical System
3.17.2.1 Faults and Troubleshooting Methods of Engine
Table 3-10 Faults and Troubleshooting Methods of Engine
(1) The battery capacity is insufficient.
(2) The cable joint is loose and the ground
wire is rusted.
(3) The control circuit, e.g., of the starting
switch, is open.
(4) The connection between carbon brush
and commutator is poor.
(5) There is open circuit or short circuit in
the starting motor
(1) Charge the battery as required.
(2) Fasten the joint and remove rust.
(3) Check the circuit to ensure the reliability
of connection
(4) Adjust the pressure of the carbon brush
spring and clean the commutator.
(5) Repair the starting motor.
The starter
motor starts
weakly, and
the engine
cannot be
started
(1) The battery capacity is insufficient.
(2) The wire has poor contact.
(3) The surface of the commutator is burnt
or greasy
(4) The carbon brush is excessively worn or
the pressure of the carbon brush spring is
insufficient
Poor contact between carbon brush
and commutator
(5) The main contact of the solenoid switch
is burnt, causing poor connection
(6)The bearing is serious worn and the
armature rubs on the motor casing.
(1) Charge the battery.
(2) Tighten the connector of the wire.
(3) Grind the surface of the commutator or
remove the grease
(4) Replacement or adjustment
(5) Grind the main contact with “0”type
non-metallic sandpaper
(6) Replace the bearing
The engine
has started,
but the starter
continues to
rotate, making
a sharp noise.
(1) Circuit switch copper contacts on the
starter are bonded to both contacts
(2) The starter lever is unhooked or the
eccentric screw is loose.
(3) The lever return spring is broken or
loses elasticity.
(4) The armature shaft of the starter
motor is broken or bent
(5) The starter motor gets stuck due to
tooth surface galling
(6) Binding of starter relay contacts
(7) The ignition switch does not
automatically return after starting.
(1) Check the circuit and trim the contacts.
(2) Readjust and fix.
(3) Replace the spring
(4) Replace the starting motor.
(5) Trim the tooth surface.
(6) Replace the starter relay
(7) Replace the ignition switch
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