Toyota 3R-B 1969, Repair Manual

Page: 178 / 193

I G N I T I O N S Y S T E M - Distributor 10-3
D riv in g P l a t e
C am
G o v e rn o r S p r in g
G o v e rn o r
W e ig h t
C am
D riv in g P in
A d v a n c e
A ngle
W e ig h t S u p p o r t P in
b e f o r e A d v a n c e
F ig . 10-3 Operation of G o vern o r
D ia p h ra g m
A d v a n c e d
G0185
G0186
A d v a n c e
A ngle
■
Jf A d v a n c e r
O c t a n e S e l e c t o r
b e f o r A d v a n c e
A d v a n c e d
F ig . 10-4 Operation of Vacuum A d v a n c e r
G1273
G1274
. . .
'
T h e distributor includes the b r e a k e r points and the condenser which a r e con­
nected in the primary circuit. It also includes the rotor and the distributor cap
which a re connected in the secondary circuit.
T h e distributor is driven by the g e a r on the camshaft in "time" with the engine.
A s the spark timing v a rie s according to the load and the engine revolution, the
automatic spark advance mechanism is provided in the distributor. T h e centri­
fugal g o v e r n o r advances the position of the cam according to the engine r e v o ­
lution, and also the vacuum advancer controls the position of the b r e a k e r plate
according to the load on the engine.
A ls o the octane selector is provided in the vacuum advan cer, and it is n e c e s ­
sary to adjust the spark timing in accordance with the quality of fuel.
Specification:
P a r t N o .
Weight
Condenser capacity
B r e a k e r point spring
tension
B r e a k e r point gap
Dwell angle
19100-44010 fo r 5R
A p p r o x . 1 . 1 kg (2 .4 lb s )
0.20 ~ 0.24 microfarad
400 ~ 550 gram s
0 .4 ~ 0.5 mm
(0.016 ~ 0 .0 2 0 " )
52°
19100-40050
fo r 3 R - C
19100-40015
fo r 3 R - B