TM 5-3805-281-24-2
Robert Bosch Starting Motor Repair
TESTING ARMATURE FOR SHORT CIRCUIT
Place armature in a growler and hold hacksaw blade
above each slot while slowly rotating the armature.
60
If coil is shorted, the blade will be attracted to and
10
repelled from the slot.
9
Short circuit most often occurs because of copper dust or
filings between two commutator segments. Clean
commutator segments to correct this short.
RG,RG34710,2351 1915MAR971/1
Place one test lead on commutator segment. Place other
test lead on an adjacent segment. Repeat this operation
for all segments by moving one lead at a time.
If the test meter indicator does not swing to zero and
remains stationary, the armature coil between these two
segments is open. Replace armature.
RG,RG34710,2352 1915MAR971/1