Pontiac tempest 1968 Service Manual page 353

6E-4
1968 P O N T I A C S E R V I C E MANUAL
Fig. 6 E - 3 Testing Armature For Ground
V
PH
SMB
IBi
¥~
p i
\
INSULATED
\
BRUSH
CONNECTOR
STRAPS
Fig. 6 E - 4 Testing Field Coils For Open
2. Using a 110-volt test lamp, place one lead on
the connector strap and the other on the field frame
(Fig, 6 E - 5 ) . Disconnect the shunt coils ground before
check is made. If lamp lights, the field coils are
grounded and defective coils must be repaired or
replaced.
3. Using a 110-volt test lamp, place one lead on
each end of shunt coils (Fig. 6 E - 6 ) . Disconnect shunt
coil grounds before check is made. If lamp does not
light, the shunt coil is open and must be replaced.
FIELD
FRAME
(GROUND)
v
fflflR
N * . CONNECTOR
f-£" STRAPS
i SHUNT COIL
GROUND LEAD
DISCONNECTED
Fig. 6 E - 5 Testing Field Coils For Ground
SHUNT COIL
GROUND LEAD
/
f /
CONNECTOR % .
STRAPS —
^ | ^ ^ ^ ^ ^ ^ ^ ^ ^
Fig. 6 E - 6 Testing Shunt Coil For Open
F I E L D COIL
Field coils can be removed from the field frame
easily by use of a pole shoe screwdriver. A pole
shoe spreader should also be used since this pre­
vents distortion of the field frame. Careful installa­
tion of field coils is necessary to prevent shorting or
grounding of field coils as the pole shoes are tight-