Your solenoid will burn out after a few hours, if you fail to correctly set
the rise and fall of the plunger. Follow the procedure to set the overdrive
"operating valve".
The correct adjustment requires loostening the 1/4 inch bolt with a 7/16
wrench on the 1/4 inch shaft running thru the overdrive. The book calls for
the valve to rise 1/32 of an inch. When trhe valve is up, the solenoid plunger
needs to be all the way up the solenoid body. In the top of the solenoid,
there is a tiny switch that shuts off one of the two internal coils. Failure
to get the plunger all the way up keeps the second coil activated resulting in
premature coil burn-out.
Best Regards,
Jim LeBlanc
1956 100-M
--- On Tue, 9/21/10, Richard Antal <rantal243@yahoo.com> wrote:
From: Richard Antal <rantal243@yahoo.com>
Subject: [Healeys] Intermittent OD:the answer
To: healeys@autox.team.net
Date: Tuesday, September 21, 2010, 7:56 AM
Greetings,
A few weeks ago I described a problem with the OD; for years it would
intermittently fail to engage when the dash switch was flipped. I thought I
had
solved that problem by correcting a faulty wire connection at the solenoid. I
enjoyed a couple thousand miles of flawless OD function and suddenly the
failure
to engage reappeared and rapidly worsened over the course of a 50 mile drive,
such that at the conclusion of the drive, the OD would never engage. A test
light attached to the solenoid demonstrated that it was getting power every
time
I flipped the dash switch. Visual inspection while the car was at rest showed
that the solenoid was lifting the plunger when power was applied. I replaced
the
solenoid and the problem has resolved. Does this mean that the solenoid can
weaken with old age (like the rest of me) and loose it's ability to fully lift
the plunger even though it can lift it part way? I can think of no other
answer.
And thanks to all who proffered advice..
rich antal
And with regards to the recent discussion of the Munched Overdrive: my OD will
disengage if I flip the dash switch up, but only if I also depress the
accelerator slightly. This, as I understand it, is correct operation. However,
if the OD is engaged and one comes to a stop and then shifts to reverse, the
OD
is still engaged because the accelerator has not been depressed. If then one
slowly begins to reverse without depressing the accelerator sufficiently, the
OD
would be damaged. That seems to me to be a design flaw.
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