DISTRIBUTOR
—
6
—
CYLINDER
The distributor, Fig. 24, incorporates an automatic governor advance and in
addition a diaphragm advance control (A), operated by engine vacuum.
The automatic governor advance pro-
vides the proper ignition timing in direct
proportion to engine speed.
The diaphragm advance control pro-
vides additional spark advance over the
governor advance, through engine vacuum,
for maximum fuel economy. When the en-
gine is running under light load and en-
gine vacuum is high, the distributor is
rotated to the maximum advanced posi-
tion. However, under heavy load condi-
tions, as when the throttle is opened for
additional acceleration or hill climbing, and
engine vacuum is low, the distributor is
rotated to the retarded position to pro-
vide the proper ignition timing for heavy
load operation and prevent fuel detonation or pinging.
LUBRICATION—Every 1,000 miles the distributor shaft grease cup (D), Fig.
25, should be turned one complete turn. Keep the cup filled with water pump grease.
The distributor shaft oil wick (E)
should be oiled every 2,000 miles with
a few drops of light engine oil. Also place
a drop of light engine oil on breaker
point arm stud (F) and apply a light
coating of water pump grease to cam
lobes (A).
Avoid over-oiling.
BREAKER
POINT
ADJUST-
MENT—Correct breaker point setting is
.020". These points are adjusted by
removing the distributor cap and crank-
ing the engine until the fiber block on the
breaker arm is on the highest point of cam
lobe (A), Fig. 25. Then loosen lock nut
(B) and adjust screw (C) until the cor-
rect clearance is obtained. Tighten lock
nut and re-check gap. Breaker points
should be clean, smooth, and make full
contact.
IGNITION TIMING—Remove spark plug from No. 1 (front cylinder), place a
finger over the spark plug hole and crank the engine until air pressure against the
finger indicates that the piston is coming up ,sit the compression stroke. Then
continue cranking slowly until the mark ½ inch ahead of the U.D.C. 1-6 / mark
HUDSON OWNER’S MANUAL
37
Figure 23
Содержание 1947 3/4-TON COMMERCIAL
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