1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

6 - 20 ELECTRICAL SYSTEM
DISTRIBUTOR
The distributor for the 6 and 8 cylinder engines rotate in
a clockwise direction. The lower end of the 8 cylinder
distributor is provided with a spiral gear which meshes with
a similar gear on the camshaft. Six cylinder distributor
shafts have an offset tongue end which fits into a slot at the
end of the oil pump shaft gear.
acceleration or hill climbing, and engine vacuum is low, the
breaker plate is rotated to the retarded position to prevent
fuel detonation or pinging.
Correct spark setting is obtained with the number one cylinder
at top dead center on compression stroke, rotor facing No. 1
terminal o f distributor cap, distributor set in mid-position in the
quadrant, and contact points just opening.
Incorporated in the distributor in an automatic centrifugal
advance and vacuum advance control.
The automatic centrifugal advance provides proper
ignition timing in relation to engine speed.
BREAKER POINT ADJUSTMENT:
Breaker points may be adjusted with distributor Installed on
car as follows:
1. Remove distributor cap and rotor.
The vacuum advance control provides additional spark
advance over the centrifugal advance through the engine
vacuum. When the engine is running under light load and
engine vacuum is high, the breaker plate is rotated to the
maximum advanced position. However, under heavy load
conditions, as when the throttle is opened for additional
acceleration or
2. Crank engine until the fibre block on the contact arm rests
on the highest pointof the cam lobe.
3. Loosen the contact support lock screw (B), Figure 17, and
turn the eccentric adjusting
FIGURE 17