TM 5-3805-291-23-1
ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
0013 00
STARTING MOTOR TEST
0013 00
No Load Test
N OT E
The following procedure is used in order to perform no-load test after starting motor has been repaired.
The test should also be performed when starting motor is removed from machine. In order to completely
check a starting motor, the complete procedure should be followed.
1.
Connect positive side of battery cable to "BAT" terminal of starting motor solenoid. Connect negative side of battery
cable to negative terminal of starting motor.
2.
Connect an open switch between "S" terminal and "BAT" terminal of solenoid.
3.
Connect multimeter red lead to "Mtr" terminal on solenoid. Connect multimeter black lead to negative terminal of start-
ing motor.
4.
Use a phototach in order to measure the speed of armature.
5.
Close the switch. The following measurements should be observed:
NO LOAD TEST
24V
Minimum Voltage
20V
Minimum Speed
5,500 rpm
Maximum Speed
7,500 rpm
Minimum Current Draw
95 Amp
Maximum Current Draw
120 Amp
N OT E
If voltage is higher, the speed will be proportionally higher.
6.
If voltage is below minimum, batteries are low and
batteries need to be charged (TM 9-6140-200-14).
427-C1982
