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TM 5-4320-305-24
3-18.
REPAIR ALTERNATOR, V-BELT PULLEY, AND FAN (Continued)
8
Inspect alternator V-belt pulley (1) and fan (2) for
nicks, dents, rust, corrosion, or other damage.
9
File burrs on V-belt pulley (1). Remove rust and
clean.
10
Straighten and aline fan (2) blades. Remove rust and
clean.
TEST:
1
Test diodes using diode tester.
a.
For the positive diode assembly and negative
diode assembly, test points are diode stems (1)
and heat sink (2). Current should flow in one
direction only. Replace entire assembly if one
diode tests faulty.
b.
For the trio diode, test points are the three wire
leads.
2
Test stator (1) using a multimeter set on ohms.
a.
Connect the multimeter test probes to each of
the following pairs of test points.
Point A to Point B
Point A to Point C
Point B to Point C
Point A to Point D
Point B to Point D
Point C to Point D
b.
The test should indicate an infinite resistance between each of the above test points. If any one test fails,
replace stator.
3-91
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