Hudson 1955 Rambler, Техническое и сервисное руководство

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2 TECHNICAL SERVICE MANUAL
the voltage regulator to No. 1 terminal on the
overdrive relay, through a 30 ampere fuse. The
circuit is resumed at terminal No. "4" and
continues to the solenoid and closed contacts
"C" to ground (Fig. 1).
Kickdown Circuit
The kickdown circuit starts from the (+) or
distributor side of the ignition coil terminal.
It continues to kickdown switch terminal "J" and
resumes from terminal "L" on to terminal "6" of
the solenoid (Fig. 1) .
THE CIRCUITS IN ACTION
At Speeds Below 30 Miles Per Hour
Decreasing the car speed to below 30 M.P.H. will
result in the opening of the overdrive governor
points (Fig. 2). This will de-energize the
relay. The current supply to the solenoid hold-
ing coil is cut off and the solenoid return
spring pulls the solenoid pawl out of the sun
gear hub because on deceleration there is no
side load on the pawl. The car will now free
wheel and when throttle is applied will pull in
third gear.
At Speeds Above 30 Miles Per Hour
When the car speed is increased to governor
cut-in speed (about 30 M.P.H.), the. governor
contacts close completing the governor circuit
to ground. This actuates the relay, closing the
relay contacts and energizing the solenoid
actuating and holding coils (Fig. 3). The
solenoid pawl is actuated to contact the step
of the overdrive sun gear balk ring. At the same
time, the actuating coil contacts are opened
and the holding coil, with a low amperage draw,
holds the solenoid pawl on the balk ring. A
momentary release of the throttle provides the
needed reversal of torque in the drive line to
slip the solenoid pawl from the step on the balk
ring into a window of the sun gear hub to obtain
overdrive operation. As the solenoid pawl
moves, the ignition interrupter points are
closed connecting that part of the interrupter
circuit to ground.
FIGURE 1-The Governor Circuit (Light Line), The Solenoid Circuit (Heavy Line), and
The Kickdown Circuit (Dotted Line) All Operate to Energize or De-energize the Solenoid