C. The starter cannot be switched on:
а) Check the operability of the starter
• check one wire of the test lamp to the
ground and another wire in turn:
1) to the power terminal of the starter (Fig.
6);
2) to the terminal of the solenoid starter
switch (having turned the starter switch key
to the second position) (Fig. 6);
1) If the test lamp lights up in both cases,
test and repair the starter;
2) if the test lamp does not light up on both
cases or lights up in one case, repair the
electric circuits of power supply and control
of the start (see below).
b) Check the operation of the starter
interlock switch “SA11” with the
gearbox reduction gear engaged (Fig.
7).
The NO interlock switch with the ball
pusher is located on the gearbox control
mechanism and integrated in the circuit
between the winding of the starter solenoid
switch “К7” and “ground”.
Operation of the switch
On engaging the gearbox reduction gear,
the switch contacts are opened under the
action of the control shaft that prevents the
engine from being started.
When the reduction gear lever is set to the
neutral position or when the gearbox lever
is set to the “Reduction gear” (Редуктор)
position, the shaft lug closes the switch
contacts, which provides connection to the
body for the starter solenoid switch and
possibility of starting the engine.
To check the switch operation, proceed as
follows:
Fig. 6. Checking the operability of the starter
“М3”: 1 – starter; 2 – test lamp.
• connect one wire of the test lamp to the
switch terminal with the wire Кч and stretch
out another one to the "+" terminal of the
regular storage battery (Fig. 7);
• set the battery disconnect switch to the
ON position;
• set the gearbox lever to the neutral
position: the switch contacts shall be
closed and the test lamp shall be lit;
• set the gearbox lever to the ON position:
the switch contacts shall be opened and
the test lamp shall not be lit.
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