Checking The Dismantled A Lternator Stator - Volvo 164 1969 Service Manual

Fig. 3-10. Checking the stator
CHECKING THE DIS: M ANTLED
ALTERNATOR
Stator
VOLVO
103011
Check the stator for possible short-circuiting. If one
or several coils are burnt, the stator will short-circuit.
Connect a test lamp (1 2 V, 2-5 W) between the stator
plates and a terminal on the stotor, see Figl . 3-10.
If the lamp lights, the insulation between the stator
winding and the sta,tor plates is damaged, in which
ca se the stator must be replaced.
N.B. Only a test lamp of 12 V, 2-5 W may be used:
110 or 220 V D.C. or A.C. lamps must NOT be
used. This applies to all the components in the
alternator.
Fig. 3-11. Checking the diodes
VOLVC
1030 12
Fig. 3·12. Checking the insulation diode
VO LVO
103013
Check the diodes with th e diode tester, see Fig. 3-11.
If any of the redifier. . diodes is faulty, the entire
diade holder (with three diodes) must be replaced.
If the in s ulation d io de is fau lty, rep lace the holder
comp lete with insulation diode.
If a diode tester is not available, the diades may be
soldered loose
(see
page 3: 6) and tested with an
ammeter. The diodes shou ld have high resistan ce in
the anti-feedback direction and low resistance in the
flow direction.
Fig. 3-13. Check-measuring the rotor
VO LVO
103 014
3:5