3-62. TRACTION MOTOR ASSEMBLY (cont)
42. Perform armature and stator megohmmeter test by the following: Armature Test
A minimum of 500 V at 1 megohm is required for this test.
a. Place lead (1) of megohmmeter (2) on shaft or core of the armature.
b. Place lead (3) of meghommeter (2) on one of the commutator bars. Note reading on meghommeter. Contact
each successive bar around the commutator.
Procedures specify the heating and cooling of parts to aid in disassembly and assembly. Heated and
cooled parts may cause injury to personnel if hand protection is not worn when handling. Wear protective
gloves for maximum protection.
c. If a reading of less than three megohms is obtained, bake armature for 4 hours at 230F (110C) in a convection
oven. Recheck megohm reading after cooling armature to room temperature. If the reading is still low, replace