TM 5-3810-307-24-1-2
SERVICE TEST SPECIFICATIONS
For Starters Released 1978 - 1994
STARTERS AND MISCELLANEOUS D.C. MOTORS
Specifications contained in this bulletin are for the purpose of testing the performance of starter and D.C. motors.
The specifications apply only when tests are conducted as recommended in the applicable service bulletin.
To obtain performance data on a motor or to determine the cause of abnormal operation, the motor should be
subjected to a "no-load" test. This test is performed as described below, with the motor removed from the engine.
No-Load Test
Be sure switch is OPEN before connections or disconnections are made.
To perform the no-load test, connect the starter motor in series with a fully charged battery of the specified
voltage as illustrated in Figure 5. An rpm indicator is necessary to measure pinion speed. Obtain the specified
voltage by varying the carbon pile. Read the current draw and the pinion speed and compare these readings with
the values listed in the published specifications.
NOTE
Do not apply voltage above what is specified. Excessive voltage may cause the
armature to throw windings.
Fig. 5 No Load Test hookup with
solenoid. Current specification
includes solenoid current.