Mail*Link(r) SMTP FWD>RE>2 More questions
Egil is right. The A-type overdrive soleniods have a two part coil: a
powerful one for engaging and a weak one for holding. When the soleniod is
not powered and the OD is disengaged, the plunger in the soleniod allows a
contact on top of the soleniod to close (it's under the black rubber cap).
This contact connect the power coil to the +12 volt input to the soleniod.
When the soleniod is switched on, the plunger is pulled up, engaging the OD
and opening the contact. With the contact open, only the weak coil is
energized, but it is enough to keep the OD engaged. When you switch off the
current to the soleniod, the plunger falls, disengaging the OD and closing
the power coil contact.
This contact is very like the points in a distributer. They burn and fail to
conduct electricity. Talk the black rubber cap and the little white plastic
cover underneath it off the solenoid to expose the contact. Use very fine
sandpaper (320 grit) to clean the contacts and put the whole thing back
together. It'll work fine.
Scott St. Clair
'68 TR250
--------------------------------------
Date: 9/6/95 11:46 PM
From: Egil Kvaleberg
In article <950906171624_92738968@mail04.mail.aol.com>, JMardy@aol.com wrote:
> 2) My overdrive solenoid needs a push to engage. It doesn't have enough
> power to engage the OD. On the bench without a load, it seems strong. The
> actuating shaft on the OD doesn't have very much resistance. Is the
solenoid
> just worn out? Can a new plunger be purchased or do I have to spend $110
on
> a new solenoid? Can the body of the solenoid be sleeved with something?
Is that an 'A' overdrive? The 'A' has two coils, one high current for
engaging, one low current for holding. A contact within the solenoid
disconnects the high power coil when the solenoid is fully engaged.
Use an Amperemeter and check the current consumption (the exact figures
should be in the book).
Egil
--
Email: egilk@oslonett.no Voice: +47 22523641/92022780 Fax: +47 22525899
Snail: Egil Kvaleberg, Husebybakken 14A, 0379 Oslo, Norway
URL: http://www.oslonett.no/home/egilk/
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From: egilk@oslonett.no (Egil Kvaleberg)
Newsgroups: mail.triumphs
To: triumphs@autox.team.net
Subject: Re: 2 More questions
Date: Thu, 07 Sep 1995 07:05:31 +0200
Organization: Siving Egil Kvaleberg AS
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