TM-9-2320-283-34-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
DECEMBER 1983
TM-9-2320-283-34-1 - Page 173 of 624
TM 9-2320-283-34-1
ELECTRICAL SYSTEM.
3-21.
ALTERNATOR AND RECTIFIER REPAIR (Continued).
LOCATION/ITEM
ACTION
REMARKS
B.
INSPECTION.
16. Alternator
Inspect all parts for wear,
Replace any damaged
assembly (71).
cracks, breakage, or burnt,
parts.
charred, or overheated
components.
C.
TESTING.
17. Positive rectifier
a. Connect positive lead (A)
Set
ohmmeter at
assembly (40)
of ohmmeter to heat sink
R X 10,000.
on item (40).
b. Touch negative lead (B) of
ohmmeter to each of the
three terminals on item
(40), one at a time.
c. A high resistance should
be indicated at all three
terminals, if not, item
(40) is shorted and must
be replaced.
d. Reverse ohmmeter test
Set ohmmeter at
leads so negative lead
R X 10,000.
(B) is connected to heat
sink on item (40).
e. Touch positive lead (A)
to all three terminals of
item (40), one at a time.
f.
A low resistance should
be indicated at all three
terminals; if not, item
(40) is open and must be
replaced.
3-120
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