3-36. MAIN GENERATOR (cont)
Place lead (3) of multimeter (2) on one of the commutator bars. Record reading on multimeter. Contact each
successive bar around the commutator and record each reading.
If the test indicates resistance readings of 10 percent or more above the average recorded readings on 20 or
more connections, tig weld all coil leads to commutator neck connections. If test indicates resistance readings
of 1/2 percent below the average or a full-scale meter deflection of the multimeter, there is a shorted coil to
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.
Below average average readings could indicate the presence of water in the coils. If below average readings
are obtained, bake armature in a convection oven for 4 hours at 230° (110°C).
Cool at room temperature and repeat steps (b).
If readings are still low, replace armature.
Components of the main generator are heavy and may be awkward to handle. Use correct lifting
procedure, indicated lifting devices, and/or assistance from other personnel to avoid injury.
Install ring assembly (65) on stator frame cover (55). Check that punch marks line up. Secure with eight T-bars
(64), lockwashers (63), and nuts (62).
Install eight brush holders (59) on stator frame cover (55) and secure with eight washers (61) and bolts (60).