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When the 22 Amps are flowing permanently because the contact in the=20
solenoid does not open to allow only the holding current to flow, which is=
=20
around 2 Amps, the overdrive line cable to the solenoid gets extremely hot=
=20
and melts!!! And can cause a massive cable burning. A friend was lucky to=
=20
realise this early enough to stop the car to catch the fire estinguisher.
I always put in a 10 Amps fuse in this line, which stands the 22 Amps for=
=20
the 2 to 3 seconds it needs to engage the solenoid, but blows when the=20
current doesn`t go back from 22 Amps to 2 Amps in short time.
Just a recommendation. I even have it in my concours cars, unvisible for=20
the judges!
=20
Josef Eckert
GERMANY
=20
=20
=20
-----Original-Nachricht-----
Betreff: Re: [Healeys] Fried OD Solenoid
Datum: 2022-03-25T19:02:52+0100
Von: "john harper" <ah100tech@gmail.com>
An: "Michael Salter" <michaelsalter@gmail.com>
=20
=20
=20
Simon
=20
The overheating is likely to because the armature has not risen enough to=
=20
break the contacts to the heavy pick coil. There is for a short while about=
=20
22 amps is flowing which heats up the heavy coil to the point where it=20
fails or the heavy contacts burn out. When operating correctly only the=20
hold current should be taken; perhaps 3 amps. The action is that the heavy=
=20
coil is needed to raise armature until when it is at the top it breaks the=
=20
heavy current. The hold coil is sufficient to do as it says and keeps the=
=20
armature in place causing the overdrive to operate.
=20
A frequent cause of the ODs with an open frame and with a rubber bottom=20
stop is that this rubber button rots with oil or falls out. With the=20
armature lower than it should be with the button in place the pick current=
=20
is insufficient to lift the armature with only part of it inside the coil. =
=20
the coil will then keep taking current.=20
=20
On mine, I have drilled and tapped the hole in which the rubber stop was=20
fitted to allow a bolt and nut to be fitted that can then be adjusted as is=
=20
possible on the enclosed versions
=20
Best regards
On Fri, 25 Mar 2022 at 15:13, Michael Salter <michaelsalter@gmail.com
Bluntly Simon, the operating valve was NOT set up correctly.=20
The "pull" coil was still being powered and drawing probably some 20
amps.
New solenoid required and some careful setup.
=20
M
On Fri., Mar. 25, 2022, 10:50 a.m. Simon Lachlan via Healeys, <
Since we=E2=80=99re on the OD topic=E2=80=A6.
I took my MkII BT7 out the other day, first time for ages, 8 weeks+/-.
Anyhow, the OD didn=E2=80=99t work. I=E2=80=99d been to a carpet trimme=
r and left my
tunnel cover with him so access was easy=E2=80=A6=E2=80=A6
The solenoid was very hot=E2=80=A6too hot to touch which made me suspic=
ious.
Anyhow, I did my OD electrical click-test and it failed at the first
hurdle. So, I took the solenoid out and=E2=80=A6well, look at the pictu=
re.
The plastic/nylon cover to the points and wiring was virtually welded
in place. And the inside is a complete mess.
So, the OD was rebuilt about 50 miles ago by OD Spares and I=E2=80=99m =
happy
with the wiring. My question is this=E2=80=A6is there a frequent or a p=
robable
cause to these fry ups?? These things check out at about =C2=A350:00 so=
I
don=E2=80=99t want to be chucking them in at regular intervals. Anythin=
g in
particular that I should look out for???
Thanks,
Simon
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">When the 22 Amps are flowing permanently because the co=
ntact in the solenoid does not open to allow only the holding current to fl=
ow, which is around 2 Amps, the overdrive line cable to the solenoid gets e=
xtremely hot and melts!!! And can cause a massive cable burning. A friend w=
as lucky to realise this early enough to stop the car to catch the fire est=
inguisher.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">I always put in a 1=
0 Amps fuse in this line, which stands the 22 Amps for the 2 to 3 seconds i=
t needs to engage the solenoid, but blows when the current doesn`t go back =
from 22 Amps to 2 Amps in short time.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Just a recommendati=
on. I even have it in my concours cars, unvisible for the judges!</span></p=
>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef Eckert</span>=
</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">GERMANY</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none"> </span></p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: Re: [Healeys] Fried OD Solenoid</p>
<p style=3D"margin: 0px;">Datum: 2022-03-25T19:02:52+0100</p>
<p style=3D"margin: 0px;">Von: "john harper" <ah100tech@gmail.com></p=
>
<p style=3D"margin: 0px;">An: "Michael Salter" <michaelsalter@gmail.com&=
gt;</p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<p style=3D"margin: 0px;"> </p>
<div>
<div dir=3D"ltr">Simon
<div> </div>
<div>The overheating is likely to because the armature has not risen enough=
to break the contacts to the heavy pick coil. There is for a short wh=
ile about 22 amps is flowing which heats up the heavy coil to the point whe=
re it fails or the heavy contacts burn out. When operating correctly only t=
he hold current should be taken; perhaps 3 amps. The action=
is that the heavy coil is needed to raise armature until when it is a=
t the top it breaks the heavy current. The hold coil is sufficient to do as=
it says and keeps the armature in place causing the overdrive to oper=
ate.</div>
<div> </div>
<div>A frequent cause of the ODs with an open frame and with a rubber =
bottom stop is that this rubber button rots with oil or falls out. With the=
armature lower than it should be with the button in place the pick current=
is insufficient to lift the armature with only part of it inside=
the coil. the coil will then keep taking current. </div>
<div> </div>
<div>On mine, I have drilled and tapped the hole in which the rubber s=
top was fitted to allow a bolt and nut to be fitted that can then be adjust=
ed as is possible on the enclosed versions</div>
<div> </div>
<div>Best regards</div>
</div>
<br />
<div class=3D"gmail_quote">
<div class=3D"gmail_attr" dir=3D"ltr">On Fri, 25 Mar 2022 at 15:13, Michael=
Salter <<a href=3D"mailto:michaelsalter@gmail.com";>michaelsalter@gmail.=
com</a>> wrote:</div>
<blockquote class=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; borde=
r-left: 1px solid #cccccc; padding-left: 1ex;">
<div dir=3D"auto">Bluntly Simon, the operating valve was NOT set up correct=
ly.
<div dir=3D"auto">The "pull" coil was still being powered and drawing proba=
bly some 20 amps.</div>
<div dir=3D"auto">New solenoid required and some careful setup.</div>
<div dir=3D"auto"> </div>
<div dir=3D"auto">M</div>
</div>
<br />
<div class=3D"gmail_quote">
<div class=3D"gmail_attr" dir=3D"ltr">On Fri., Mar. 25, 2022, 10:50 a.m. Si=
mon Lachlan via Healeys, <<a href=3D"mailto:healeys@autox.team.net";>heal=
eys@autox.team.net</a>> wrote:</div>
<blockquote class=3D"gmail_quote" style=3D"margin: 0px 0px 0px 0.8ex; borde=
r-left: 1px solid #cccccc; padding-left: 1ex;">
<div lang=3D"EN-GB">
<div>
<p class=3D"MsoNormal">Since we’re on the OD topic….<u></u><u>=
</u></p>
<p class=3D"MsoNormal">I took my MkII BT7 out the other day, first time for=
ages, 8 weeks+/-.<u></u><u></u></p>
<p class=3D"MsoNormal">Anyhow, the OD didn’t work. I’d been to =
a carpet trimmer and left my tunnel cover with him so access was easy&helli=
p;…<u></u><u></u></p>
<p class=3D"MsoNormal">The solenoid was very hot…too hot to touch wh=
ich made me suspicious. Anyhow, I did my OD electrical click-test and it fa=
iled at the first hurdle. So, I took the solenoid out and…well, look=
at the picture.<u></u><u></u></p>
<p class=3D"MsoNormal">The plastic/nylon cover to the points and wiring was=
virtually welded in place. And the inside is a complete mess.<u></u><u></u=
></p>
<p class=3D"MsoNormal">So, the OD was rebuilt about 50 miles ago by OD Spar=
es and I’m happy with the wiring. My question is this…is there=
a frequent or a probable cause to these fry ups?? These things check out a=
t about £50:00 so I don’t want to be chucking them in at regula=
r intervals. Anything in particular that I should look out for???<u></u><u>=
</u></p>
<p class=3D"MsoNormal">Thanks,<u></u><u></u></p>
<p class=3D"MsoNormal">Simon<u></u><u></u></p>
</div>
</div>
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