[Healeys] Fwd: Overdrive pressures

[Roger Grace <roggrace@telus.net>]

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Sorry I neglected to copy the list.
On 2x BJ8 have upgraded the OD hydraulics including new accumulator main
spring O ring piston and the NR and operating valve balls and springs as a
package from OD Spares in UK. Both cars now have pressure over 500 psi - a
non calibrated gauge I will admit to. Really do prefer the O ring style
piston. BTW this piston has a slightly larger diameter of 1.196 compared to
the 1 1/8 per original. So you have to replace the accumulator as well.
rg

---------- Forwarded message ---------
From: Roger Grace <roggrace@telus.net>
Date: Mon., Aug. 7, 2023, 8:43 p.m.
Subject: Re: [Healeys] Overdrive pressures
To: David Wirken <dmw@wirkenphoto.com>


No !
Suspect that your replacement piston uses an O ring instead of the old
sleeve rings. That, together with a new spring usually ups the pressure. Is
it engaging too quickly with a jolt ?
rg

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On Mon, Aug 7, 2023 at 8:37=E2=80=AFPM 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 abou=
t
> 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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<div dir=3D"auto"><div>Sorry I neglected to copy the list.</div><div dir=3D=
"auto">On 2x BJ8 have upgraded the OD hydraulics including new accumulator =
main spring O ring piston and the NR and operating valve balls and springs =
as a package from OD Spares in UK. Both cars now have pressure over 500 psi=
 - a non calibrated gauge I will admit to. Really do prefer the O ring styl=
e piston. BTW this piston has a slightly larger diameter of 1.196 compared =
to the 1 1/8 per original. So you have to replace the accumulator as well.<=
/div><div dir=3D"auto">rg</div><div dir=3D"auto"><br><div class=3D"gmail_qu=
ote" dir=3D"auto"><div dir=3D"ltr" class=3D"gmail_attr">---------- Forwarde=
d message ---------<br>From: <strong class=3D"gmail_sendername" dir=3D"auto=
">Roger Grace</strong> <span dir=3D"auto">&lt;<a href=3D"mailto:roggrace@te=
lus.net">roggrace@telus.net</a>&gt;</span><br>Date: Mon., Aug. 7, 2023, 8:4=
3 p.m.<br>Subject: Re: [Healeys] Overdrive pressures<br>To: David Wirken &l=
t;<a href=3D"mailto:dmw@wirkenphoto.com";>dmw@wirkenphoto.com</a>&gt;<br></d=
iv><br><br><div dir=3D"ltr"><div>No !</div><div>Suspect that your replaceme=
nt piston uses an O ring instead of the old sleeve rings. That, together wi=
th a new spring usually ups the pressure. Is it engaging too quickly with a=
 jolt ?<br></div><div>rg<br></div></div><div id=3D"m_5857095237910007045DAB=
4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br><table style=3D"border-top:1px solid=
 #d3d4de"><tbody><tr><td style=3D"width:55px;padding-top:13px"><a href=3D"h=
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el=3D"noreferrer"><img src=3D"https://s-install.avcdn.net/ipm/preview/icons=
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tyle=3D"width:46px;height:29px"></a></td><td style=3D"width:470px;padding-t=
op:12px;color:#41424e;font-size:13px;font-family:Arial,Helvetica,sans-serif=
;line-height:18px">Virus-free.<a href=3D"http://www.avg.com/email-signature=
?utm_medium=3Demail&amp;utm_source=3Dlink&amp;utm_campaign=3Dsig-email&amp;=
utm_content=3Dwebmail" style=3D"color:#4453ea" target=3D"_blank" rel=3D"nor=
eferrer">www.avg.com</a></td></tr></tbody></table><a href=3D"#m_58570952379=
10007045_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width=3D"1" height=3D"1" rel=
=3D"noreferrer"></a></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" c=
lass=3D"gmail_attr">On Mon, Aug 7, 2023 at 8:37=E2=80=AFPM David Wirken via=
 Healeys &lt;<a href=3D"mailto:healeys@autox.team.net"; target=3D"_blank" re=
l=3D"noreferrer">healeys@autox.team.net</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Recently=C2=A0overh=
auled 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=C2=A0about 80 PSI when=
 engaged or disengaged and jumps back up to 470 PSI very quickly.=C2=A0<div=
>Question is &quot; should I be concerned about the high numbers I am exper=
iencing ?</div><div><br></div><div>THANKS for your input</div><div><br></di=
v><div>Dave</div></div>
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