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On a side note: Someone commented that the higher pressures reported may
have been caused by the owner using the O-ring style accumulator pistons
as opposed to the 'traditional' metal rings style. Though I think the
O-rings are a good idea--I would have used them if I'd known/thought
about them--I don't think that alone would necessarily account for
higher pressures. Accumulator pressure is limited by relief holes in the
bore; when the piston is pushed far enough back, the holes are exposed
and allow fluid to flow out of the accumulator (the piston both builds
pressure and regulates it). The metal ring type pistons--they look like
small engine pistons--should develop the spec'd pressure; but the
O-rings would be less likely to score the bore and cause pressure loss
over time. Or, are the metal ring type that leaky? Two things could
cause higher-than-spec pressure: 1) much stronger accumulator spring(s)
or 2) an inaccurate gauge. The oil pressure gauge on my BJ8 registered
zero PSI for many years--obviously, it had SOME pressure--but my car
miraculously gained 20PSI at idle when I had the gauge rebuilt and
adjusted to a standard (i.e. 'calibrated').
On another note; just caught an episode of Wheeler Dealers where Elvis
fixed an inop O/D on a Triumph Dolomite Sprint (I had never heard of the
car before but, of course, 'Dolomite' has Healey history). The O/D
appeared to be a Laycock, but the offending part--the solenoid,
natch--was a more robust-appearing unit mounted horizontally on the
bottom of the O/D. Anyone know anything about what, presumably, is a
later Laycock unit?
On 8/9/2023 11:39 AM, warthodson--- via Healeys wrote:
> Dave, I found this in my Spam file. Surely someone has an opinion
> concerning the 500-550 psi!
> Gary Hodson
>
> On Wednesday, August 9, 2023 at 03:05:56 AM CDT, John and Kerry Rowe
> <jtkarowe@gmail.com> wrote:
>
>
> I would be very happy with those pressures. I wish!
>
> On Tue, Aug 8, 2023 at 1:39â?¯PM David Wirken via Healeys
> <healeys@autox.team.net> wrote:
>
> Recently overhauled OD when testing the pressure, it measured 500
> to 550 psi on the gauge.The book says it should be 470 to 490 PSI
> and drops about 80 PSI when engaged or disengaged and jumps back
> up to 470 PSI very quickly.
> Question is " should I be concerned about the high numbers I am
> experiencing ?
>
> THANKS for your input
>
> Dave
>
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On a side note: Someone commented that the higher pressures reported
may have been caused by the owner using the O-ring style accumulator
pistons as opposed to the 'traditional' metal rings style. Though I
think the O-rings are a good idea--I would have used them if I'd
known/thought about them--I don't think that alone would necessarily
account for higher pressures. Accumulator pressure is limited by
relief holes in the bore; when the piston is pushed far enough back,
the holes are exposed and allow fluid to flow out of the accumulator
(the piston both builds pressure and regulates it). The metal ring
type pistons--they look like small engine pistons--should develop
the spec'd pressure; but the O-rings would be less likely to score
the bore and cause pressure loss over time. Or, are the metal ring
type that leaky? Two things could cause higher-than-spec pressure:
1) much stronger accumulator spring(s) or 2) an inaccurate gauge.
The oil pressure gauge on my BJ8 registered zero PSI for many
years--obviously, it had SOME pressure--but my car miraculously
gained 20PSI at idle when I had the gauge rebuilt and adjusted to a
standard (i.e. 'calibrated').<br>
<br>
On another note; just caught an episode of Wheeler Dealers where
Elvis fixed an inop O/D on a Triumph Dolomite Sprint (I had never
heard of the car before but, of course, 'Dolomite' has Healey
history). The O/D appeared to be a Laycock, but the offending
part--the solenoid, natch--was a more robust-appearing unit mounted
horizontally on the bottom of the O/D. Anyone know anything about
what, presumably, is a later Laycock unit?<br>
<br>
<br>
<div class="moz-cite-prefix">On 8/9/2023 11:39 AM, warthodson--- via
Healeys wrote:<br>
</div>
<blockquote type="cite"
cite="mid:928988624.1752318.1691606350952@mail.yahoo.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div class="ydpf9d02591yahoo-style-wrap" style="font-family:Comic
Sans MS, sans-serif;font-size:16px;">
<div dir="ltr" data-setdir="false">Dave, I found this in my Spam
file. Surely someone has an opinion concerning the 500-550
psi!</div>
<div dir="ltr" data-setdir="false">Gary Hodson </div>
<div><br>
</div>
</div>
<div id="ydpe0c6e4beyahoo_quoted_1632753241"
class="ydpe0c6e4beyahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial,
sans-serif;font-size:13px;color:#26282a;">
<div> On Wednesday, August 9, 2023 at 03:05:56 AM CDT, John
and Kerry Rowe <a class="moz-txt-link-rfc2396E"
href="mailto:jtkarowe@gmail.com";><jtkarowe@gmail.com></a> wrote: </div>
<div><br>
</div>
<div><br>
</div>
<div>
<div id="ydpe0c6e4beyiv9562235249">
<div>
<div dir="ltr">I would be very happy with those
pressures. I wish!</div>
<br clear="none">
<div class="ydpe0c6e4beyiv9562235249gmail_quote">
<div id="ydpe0c6e4beyiv9562235249yqt70578"
class="ydpe0c6e4beyiv9562235249yqt4883648648">
<div dir="ltr"
class="ydpe0c6e4beyiv9562235249gmail_attr">On Tue,
Aug 8, 2023 at 1:39â?¯PM David Wirken via Healeys
<<a shape="rect"
href="mailto:healeys@autox.team.net";
rel="nofollow" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote:<br clear="none">
</div>
<blockquote style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex;"
class="ydpe0c6e4beyiv9562235249gmail_quote">
<div dir="ltr">Recently overhauled OD when testing
the pressure, it measured 500 to 550 psi on the
gauge.The book says it should be 470 to 490 PSI
and drops about 80 PSI when engaged or
disengaged and jumps back up to 470 PSI very
quickly.Â
<div>Question is " should I be concerned about
the high numbers I am experiencing ?</div>
<div><br clear="none">
</div>
<div>THANKS for your input</div>
<div><br clear="none">
</div>
<div>Dave</div>
</div>
<br>
</blockquote>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
<br>
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