Mark, et al,
I quite agree.
Inside the throttle switch is a simple cam which is connected to the upper
teminal There is a simple blade contact which is connected to the other
terminal. This blade is usually in contact with the cam, giving you a
complete contact from one terminal to the other. There is one place on the
flat portion of the cam that will lose contact with the blade as it comes
around. Attached to this cam is a little coil spring that brings the cam
back up into the contact range when at rest. This little spring by the way
is what you hear protesting as it stretches through a bit of an arc as the
cam shaft is turned. It has nothing to do with the actual contact blade.
Pretty simple arrangement so far.
The only things that can mess up this very simple arrangement are:
1. corrosion of the contact blade and cam surface. This can easily be
cleaned with fine emery paper.
2. someone has bent the contact blade so it either won't make contact at
all, or makes contact all the time no matter what the cam position. This can
gently be bent back as required until you have the desired adjustment. See
above.
3. the most common problem is that the adjustment relative to throttle
setting is out of whack. Have someone sit in the driver's seat and depress
the throttle pedal about 2" while you connect an ohm meter (continuity
tester) across the two throttle switch contacts. Loosen the clamp bolt on
the throttle switch lever and with a flat blade screwdriver, turn the cam
shaft until the ohm meter shows contact is lost. Tighten the clamp bolt at
that position.
Bob can even be your uncle!!
Rich Chrysler
----- Original Message -----
From: "Mark and Kathy" <mgtrcars@galaxyinternet.net>
To: <healeys@Autox.Team.Net>
Sent: Friday, January 26, 2007 6:56 AM
Subject: Re: Overdrive switch, COME ON NOW!
> Oh darn, I have 2 editions of this book but not enough pages.
> Guess I'll have to order the extra pages ,wait for 2 weeks, then get the
> answers to this.
>
> If anyone would be kind enough to tell Simon what to clean when he's in
> the switch I think that is what this list is really about, or should be.
>
> Mark
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