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Simon,<br>
<br>
What have you done to rule out the O/D relay (the one on the
scuttle). I've had them go intermittent.<br>
<br>
Bob<br>
<br>
<div class="moz-cite-prefix">On 4/25/2024 9:29 AM, Simon Lachlan via
Healeys wrote:<br>
</div>
<blockquote type="cite"
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<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">So,
here is Michael’s “Step 1” completed. (See his email,
below).<o:p></o:p></span></p>
<ol style="margin-top:0cm" type="1" start="1">
<li class="MsoListParagraph"
style="margin-left:0cm;mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Removed
the operating valve and, just for luck, disconnected the
two wires into 3<sup>rd</sup>/4<sup>th</sup> switch. Took
the car for a spin. Up/down longish/steepish hills, 10
miles on motorway. Various rpm…..no slippage at all.<o:p></o:p></span></li>
<li class="MsoListParagraph"
style="margin-left:0cm;mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Had
a puncture…..nail in tyre. Rear RHS. Flat as a pancake at
once. Nearly onto rim. Nail! I imagine the inner tube is
shredded and the tyre may be a write-off. (Usually are!).
Anyhow, I bore you with this as I’m convinced that I’d
never have got the wheel off without the little scissors
jack which I carry to get the car up the first few inches
until the Healey jack comes into play. Just a
suggestion…….<o:p></o:p></span></li>
<li class="MsoListParagraph"
style="margin-left:0cm;mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Got
home and jacked car up to test pressure. Steady at 520psi
which, I recall, is plenty. Stayed at 520 across rev
range. Dropped very slowly once engine was off and dropped
to zero as I engaged/disengaged OD a few times. Which is
normal I think?<o:p></o:p></span></li>
<li class="MsoListParagraph"
style="margin-left:0cm;mso-list:l0 level1 lfo1"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Solenoid
makes a robust “click” when it should and engages the OD
when activated.<o:p></o:p></span></li>
</ol>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">So
what’s a sensible “Step 2”??<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">
I have been urged to check the setting of the Throttle
Switch (TS). Assuming that the slippage returns (and why
wouldn’t it?), I’ll short the TS out to see if that fixes
it. If it does, I’ll check the adjustment.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Suggestions
would be more than welcome……I do dread having to take that
box out again. I’ve got a very adequate ramp and a very
strong volunteer(?) but, regardless of all that, it’s still
quite a task. And, like a few of us, I’m not as young as I
once was. I’ve always enjoyed the lines from the manual
which I reproduce, below. “Gently ease”!?! <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><img
style="width:5.1583in;height:.7583in" id="Picture_x0020_1"
src="cid:part1.8FEn0pkl.xcAItH2N@comcast.net" class=""
width="495" height="73"></span><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US">Thanks,
Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Times New Roman",serif;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"
lang="EN-US"> Michael Salter
<a class="moz-txt-link-rfc2396E" href="mailto:michaelsalter@gmail.com"><michaelsalter@gmail.com></a> <br>
<b>Sent:</b> Monday, April 22, 2024 3:21 PM<br>
<b>To:</b> Simon Lachlan
<a class="moz-txt-link-rfc2396E" href="mailto:simon.lachlan@alexarevel.plus.com"><simon.lachlan@alexarevel.plus.com></a><br>
<b>Cc:</b> Healeys <a class="moz-txt-link-rfc2396E" href="mailto:healeys@autox.team.net"><healeys@autox.team.net></a><br>
<b>Subject:</b> Re: [Healeys] Overdrive pressure or clutch
slip<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal"><b><u>Correct diagnosis is 1/2 the
repair!!</u></b><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<p class="MsoNormal">First you need to confirm whether the
clutch (on the flywheel) or the overdrive is causing the
slippage. <o:p></o:p></p>
<div>
<p class="MsoNormal">To do this you ABSOLUTELY MUST disable
the overdrive as a badly misadjuster overdrive operating
valve can produce similar symptoms. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">To do this I would remove the overdrive
operating valve completely. (There are other ways but this
is absolutely definitive).<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Now drive the car up a long hill where
you are amle to use full throttle at around 3000 RPM
(maximum torque) for a few seconds. If it is the clutch
(on the flywheel) that is causing the slippage these
operating conditions. Test this a few times to be sure.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">If there is no slippage we have
confirmed that the overdrive clutch is at fault.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Step 1 completed. Please report
results. MS.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<blockquote
style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<div>
<p class="MsoNormal">On Mon., Apr. 22, 2024, 8:08 a.m.
Simon Lachlan via Healeys, <<a
href="mailto:healeys@autox.team.net" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote
style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<div>
<p><span
style="font-family:"Times New Roman",serif">You may recall the
very extended overdrive and clutch saga last year.</span>
<span
style="font-family:"Times New Roman",serif">Long story
short(ish)…</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">OD was slipping in
and out depending on oil temperature.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Correctly
diagnosed pressure. Checked with gauge.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Attempted
rebuild…going only so far as</span> <span
style="font-family:"Times New Roman",serif">accumulator and
related seals.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Stymied as could
not get pump out. Turned out to have been “fixed”
at some stage with some form of “chemical metal”
which was coming loose/apart.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Took it up to OD
Spares who fixed it..new housing etcetc</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Why not a new
clutch I thought? Sensible while you’re in the
area looking at a 30+ yr old item.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">New clutch…no
good. Noisy, wouldn’t</span> <span
style="font-family:"Times New Roman",serif">engage/disengage/play
at all.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Gearbox out again.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Refit clutch.
Presumed I’d made some beginner’s mistake.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Refit gearbox…no
good. Same</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Can’t recall
whether I tried again. Lost count and enthusiasm
by now.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Turned out that
the new clutch kit was defective. (Thanks Mirek)
(Genuine B&B from AHSpares).</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">New one did work.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Saga over until
yesterday.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Same sort of
symptoms…..</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">All’s well for
first 10 or so miles. Then the dreaded slippage(?)
starts. But it’s not quite the same. Reminds me
more of a slipping clutch. (But NO smell)</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Symptoms continue
if it’s in or out of OD.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Symptoms reduce at
speed.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Yes, plenty of
oil. Over the full mark. Looks very clean. Pretty
sure it’s 40wt</span> <span
style="font-family:"Times New Roman",serif">non-detergent
topped up with 30wt non-detergent. (Or
vice-versa).</span> <span
style="font-family:"Times New Roman",serif">Am confident in
state of the filter, magnets etc.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">No, I have not
pressure tested it yet and yes, I dread restarting
the whole bloody process all over again. I’m not
sure I can face taking the box out again once, let
alone multiple times.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">What I want and
experience tells me I’m unlikely to get is a
miracle cure!</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">One initial
question…..do OD relays either work or not work?
ie, can the relay hover between on and off</span>
<span
style="font-family:"Times New Roman",serif">which might lead
to the OD coming in and out? I think that could
happen if the switch is off but the unit still
hasn’t got the message to disengage from the
bulkhead switch.</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">And a
supplementary….how</span> <span
style="font-family:"Times New Roman",serif">do I bench test</span>
<span
style="font-family:"Times New Roman",serif">the relay?</span><o:p></o:p></p>
<p><span
style="font-family:"Times New Roman",serif">Simon</span><o:p></o:p></p>
</div>
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