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Page Title:
ALTERNATOR REPAIR (cont) |
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 TM 10-3930-638-24&P
3-12. ALTERNATOR REPAIR (cont)
REMARKS
ACTION
ITEM
LOCATION-
STEP
TESTING (cont)
Use an ohmmeter to check. Connect test
Test
Stator (4)
14
prods as shown. If meter reading is
low when connected to any stator
lead and frame, the windings are
grounded. If the meter reading is high
when connected between each pair
of stator leads, the windings are open.
If stator winding is grounded or open
or if evidence of short is observed, re-
place stator
Use 110 volt test lamp. Connect test lamp
Test
Rotor (23)
15
from rotor slip ring to rotor shaft. If lamp
lights, the field windings are grounded.
Connect test lamp leads to each rotor slip
ring. If lamp fails to light, field windings
are open. Connect ammeter and battery
to rotor as shown. If ammeter indicates
more than 4.0 to 4.5 amperes, rotor field
windings are shorted. If field windings are
grounded, open or have shorted, replace
rotor
REASSEMBLY
Install
a. Grease slinger
Drive end
16
washer (30)
frame (1)
Use camshaft gear remover tool
Back up
b. Inside of bearing
area on end
frame (1)
Press on closed end of bearing until flush
Install
c. Ball bearing (29)
with end frame housing
Use valve guide installer tool until retainer
install
d. Ball bearing re-
seats against bearing (29)
tainer plate (28)
Until retainer (28) is securely mounted
Install and
e. Three screws (27)
tighten
3-99
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