Re: 39 Packard OD solenoid
Posted by Ross On 2022/3/24 6:08:01
The hold in coil is inside the solenoid and is wired in parallel to the pull-in coil through a set of contacts. When the solenoid is first energized at the moment you tromp the throttle, both the hold-in and the pull-in coils work to yank the armature outward. That requires on the order of 15+ amps. As the armature reaches the end of its travel it presses the contacts open to cut off the pull-in coil. The amp requirements drop to 3 or 4 so the thing doesn't burn up if someone kept their foot buried on the gas to climb a steep hill or pull away from some wheezing Zephyr.
The same idea was used in the later solenoids but they are pushing the pawl out rather than drawing it in. This was a brilliant paradigm "shift" as it eliminated the elaborate flyweight mechanism in the overdrive in favor of the cheaper electrical governor.
I have R6 in my 41 Commander and it works nicely, but not as smoothly as the later units. And yes it clicks if you push the throttle to the floor before starting the engine.
Attach file:
IMG_7867 (3).jpg (675.08 KB)
The same idea was used in the later solenoids but they are pushing the pawl out rather than drawing it in. This was a brilliant paradigm "shift" as it eliminated the elaborate flyweight mechanism in the overdrive in favor of the cheaper electrical governor.
I have R6 in my 41 Commander and it works nicely, but not as smoothly as the later units. And yes it clicks if you push the throttle to the floor before starting the engine.
Attach file:
IMG_7867 (3).jpg (675.08 KB)
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