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Terex Fermec 760 - Page 34

Terex Fermec 760
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34
Testing the voltage drop across the sole-
noid contacts
Test equipment
0 to 20 V dc voltmeter
NOTE :
This test can be made with the starter motor
still installed on the machine.
Do the voltage drop across the solenoid contacts test
as follows:
1. Remove the protective cover (13), the nut (12)
and the cover (14).
2. Connect the voltmeter across the two main sole-
noid terminals.
3. When the starter switch is open, the voltmeter
should register battery voltage. When the starter
switch is closed the reading should be zero or
fractional value.
4. A zero or fractional reading indicates that the
high resistance deduced in the voltage drop on
the insulated line test must be due either to high
resistance in the starter cables or soldered con-
nections. A high reading (similar to the voltage
drop on the insulated line test) indicates a faulty
solenoid or connection, refer to page 8.
5. Install the cover (14), the nut (12) and the pro-
tective cover (13).
6. Close the hood.
Key
A STARTER SWITCH
B TACHOMETER POSITION
789M055A
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