ENGINE DIVISION SERVICE MANUAL
ELECTRICAL
Fig. 9. No Load Test Hookup
Test No 4 - No Load Test
Before performing the "No Load Test" look the motor
over. The pinion should be checked to be sure it is free
by turning it on the screw shaft. The armature should be
checked so that it is free to rotate by prying the pinion
with a screw driver. Tight bearing, bent armature shaft
or loose pole shoe
screws could cause the armature not to turn freely. The
motor should be disassembled if the armature does not
turn freely. However, if the armature will rotate freely,
the next step is to give the motor a no load test before
disassembly.
Connect the starting motor in series with a fully
charged battery of the specified voltage, an ammeter
capable of reading several hundred amperes, and a
variable resistance. Also connect a voltmeter as
illustrated in Fig. 9 from the motor terminal to the motor
frame. An R.P.M. indicator is necessary to measure
armature speed. Obtain the specified voltage by varying
the re-sistance unit, then read the current draw and the
armature speed and com-pare these readings with the
values
listed
in
the
specifications.
CGES-230 - Page 10
PRINTED IN UNITED STATES OF AMERICA
