Toyota 3R-B 1969, Repair Manual

Page: 150 / 193

C H A R G I N G S Y S T E M - A lt ernator 8-11
P i g . 8-16 Testing Stator B0041
Coil fo r Insulation
2. Check the stator coil fo r open c i r ­
cuit .
In o r d e r to p erform this test, the
stator coil leads must be discon­
nected from the rectifier leads.
T o disconnect the leads, hold the
rectifier lead with a nose pliers
to prevent the rectifier from heat­
ing, and melt the soldered portions
using an electric soldering iron
of 100 n 200 watts fo r 2 seconds.
F ig . 8-17 Melting S o ld e r G3364
Check the four leads of the stator
coil fo r conductance between them .
If the tester needle does not m o v e ,
the stator coil is opened, and must
be replaced.
Brush & Brush H older
1. Check the brush f o r crack and
w e a r .
If the brush is w orn beyond 9 mm
( 0 . 3 5 " ) , replace the brushes.
T h e brush should slide smoothly .
F ig . 8-19 Brush Length V1143
2. If replacing the brush, install .the
new brush and the brush spring
into the brush holder, then solder
the brush lead w i r e keeping the
protruded brush length to 13 mm
( 0 . 5 1 " ) .
A f t e r soldering the brush lead,
check if the brush movement is
smooth.
13mm (0 51'!)'
L r
1 1 m i | | ., : '-
5 *
w
1
w
L
F i g . 8-20 Replacing Bru sh V0216
V0217
F i g . 8-18 Testing Stator Coil V1145
fo r Open Circuit