ARMY TM 9-2815-260-24
AIR FORCE TO 38G1-126-2
MARINE CORPS TM 09244A/09245A-24
Using a growler tester, place armature on it and hold a hacksaw blade against armature
core while slowly rotating armature, refer to Figure 4-27. A short circuited armature
causes blade to vibrate and be attracted to core. An armature which is short circuited
must be replaced.
FIGURE 4-27. GROWLER TEST
Set multimeter for ohms and touch one probe to a commutator segment and other one to
armature core, refer to Figure 4-28. There should be no continuity, armature is grounded.
Replace armature if grounded.
FIGURE 4-28. TESTING FOR GROUNDED WINDINGS