TM 5-1940-277-34
ALTERNATOR REPAIR INSTRUCTIONS
(Continued)
LOCATION
ITEM
ACTION
REMARKS
BENCH TEST
18.
Alternator
a.
Insulation
a.
Secure one
(faults)
test lead
to housing.
CAUTION
Do not apply this test between any two terminals. Serious damage will be caused to the diodes.
b.
Connect other
lead to each
terminal in
turn. Minimum
resistance 10
Megohms.
b.
Field coil
a.
Select lowest
Use multimeter.
Circuit
resistance
(continuity)
range on
multimeter.
b.
Attach probes
A low resistance
to terminals
should be
A and F.
indicated.
c.
Rotate rotor
a.
Low resis-
slowly by
tance indi-
hand.
cation
should vary
slightly.
b.
Large varia-
tion usually
indicates
sticking
brushes or
dirty slip
ring.
d.
Correct any
faults noted.
2-85
