SPECIFICATIONS
TM 9-4940-568-34
5-157
NO LOAD TEST (INCLUDES SOLENOID CURRENT)
VOLTS
MIN
AMPS
MAX.
AMPS
MIN.
RPM
MAX.
RPM
20
75
90
360
5400
SOLENOID (CURRENT CONSUMPTION)
PULL-IN WINDING
HOLD-IN WINDING
AMPS
VOLTS
OHMS
AMPS
VOLTS
OHMS
100-125
20
0.16-0.20
12-14
20
1.45-1.65
Keep fingers and tools away from opening in drive end housing while testing. The
strong shifting action of the solenoid could cause personal injury as the drive pinion
moves into the cranking position and spins. Failure to comply may cause injury to
personnel.
During no-load test, close switch and operate starter motor for cycles of 30 seconds
maximum. Between cycles, allow starter motor to cool for at least two minutes.
Otherwise, overheating and damage to the starter motor may result.
(2)
Momentarily close switch.
(a)
If there is high current flow and starter motor fails to operate (zero rpm), release switch
immediately. Internal mechanical damage is indicated. Discontinue test and refer to
Troubleshooting.
(b)
If there is no current flow and starter motor fails to operate (zero rpm), release switch immediately.
An open circuit is indicated. Discontinue test and refer to Troubleshooting.
(c)
If there is current flow and starter motor operates, release switch and proceed with the next step of
the no-load test.
(3)
Close switch and observe voltmeter. Adjust carbon pile load to obtain 10 volt reading (20 volts on
24-volt starter motor). Observe and record ammeter and RPM readings. Release switch.
(4)
Compare ammeter and RPM readings to those listed under “Specifications” at the end of this manual. If
the readings are outside the limits shown, refer to Troubleshooting to determine the most likely causes. If
the readings are within the limits, the starter motor is operating normally.
END OF TASK
