Subject: [Healeys] PBR brake servo

From: Stephen Hutchings <[email-masked]>
Date: Tue, 31 May 2022 13:36:34 -0400

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Hello everyone,

I=E2=80=99ve had a PBR VH44 brake servo on my car for over 25 years, and =
I=E2=80=99ve found a source for a rebuild kit.
I was looking to rebuild the unit, not because there=E2=80=99s anything =
wrong with it, but it's been in active service a long time, and I really =
don=E2=80=99t want to find out it=E2=80=99s failed the hard way.
I use Dot 5 silicone fluid (please let=E2=80=99s not get into that =
controversy again!), and it would not be very good if that got sucked in =
to the engine via the manifold.

Anyway, I wonder if anyone out there has rebuilt one of these units. =
I=E2=80=99ve attached a couple of photos - one of the opened unit, and a =
close up of the end of the shaft that goes into the cylinder bore.  =
I=E2=80=99m really not sure of how to release this gizmo=E2=80=A6and I =
don=E2=80=99t want to bugger it up, of course.
I will probably end up phoning the supplier in Australia (I=E2=80=99m in =
Canada), but I thought I=E2=80=99d check with the list first.

Thanks,
Stephen, BJ8

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">Hello=
 everyone,<div class=3D""><br class=3D""></div><div class=3D"">I=E2=80=99v=
e had a PBR VH44 brake servo on my car for over 25 years, and I=E2=80=99ve=
 found a source for a rebuild kit.</div><div class=3D"">I was looking to =
rebuild the unit, not because there=E2=80=99s anything wrong with it, =
but it's been in active service a long time, and I really don=E2=80=99t =
want to find out it=E2=80=99s failed the hard way.</div><div class=3D"">I =
use Dot 5 silicone fluid (please let=E2=80=99s not get into that =
controversy again!), and it would not be very good if that got sucked in =
to the engine via the manifold.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Anyway, I wonder if anyone out there =
has rebuilt one of these units. I=E2=80=99ve attached a couple of photos =
- one of the opened unit, and a close up of the end of the shaft that =
goes into the cylinder bore. &nbsp;I=E2=80=99m really not sure of how to =
release this gizmo=E2=80=A6and I don=E2=80=99t want to bugger it up, of =
course.</div><div class=3D"">I will probably end up phoning the supplier =
in Australia (I=E2=80=99m in Canada), but I thought I=E2=80=99d check =
with the list first.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Thanks,</div><div class=3D"">Stephen, BJ8</div><div =
class=3D""><br class=3D""></div><div class=3D""><img apple-inline=3D"yes" =
id=3D"5A99A00F-7017-4990-BC9C-A4F0E284F9B4" =
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apple-inline=3D"yes" id=3D"36BBD8CF-3920-49D4-B86D-A2CF9B54A548" =
src=3D"cid:C1F106D8-1F36-4F3E-A5F6-F81F52C0314E" =
class=3D""></div></body></html>=

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From: Alan Seigrist <[email-masked]>
Date: Wed, 1 Jun 2022 08:17:38 +0800

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Hi Stephen -

I believe the "diaphragm collar" undscrews from the "push rod".  There
should be a hole in the pushrod shaft somewhere, where you can place a
small diameter screwdriver or punch then hold the pushrod still while you
unscrew the diaphragm collar.

I could be wrong but I think that's how it is done on the PBR.  On the
Delphi/Lockheed unit you peel back the diaphragm and theres a metal sleeve
that you pull out... works very different to the PBR.

Best,

Alan

> I=E2=80=99ve had a PBR VH44 brake servo on my car for over 25 years, and =
I=E2=80=99ve
> found a source for a rebuild kit.
> I was looking to rebuild the unit, not because there=E2=80=99s anything w=
rong with
> it, but it's been in active service a long time, and I really don=E2=80=
=99t want to
> find out it=E2=80=99s failed the hard way.
> I use Dot 5 silicone fluid (please let=E2=80=99s not get into that contro=
versy
> again!), and it would not be very good if that got sucked in to the engin=
e
> via the manifold.
>
> Anyway, I wonder if anyone out there has rebuilt one of these units. I=E2=
=80=99ve
> attached a couple of photos - one of the opened unit, and a close up of t=
he
> end of the shaft that goes into the cylinder bore.  I=E2=80=99m really no=
t sure of
> how to release this gizmo=E2=80=A6and I don=E2=80=99t want to bugger it u=
p, of course.
> I will probably end up phoning the supplier in Australia (I=E2=80=99m in =
Canada),
> but I thought I=E2=80=99d check with the list first.
>
> Thanks,
> Stephen, BJ8
>
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
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> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

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<div dir=3D"ltr">Hi Stephen -<div><br></div><div>I believe the &quot;diaphr=
agm collar&quot; undscrews from the &quot;push rod&quot;.=C2=A0 There shoul=
d be a hole in the pushrod shaft somewhere, where you can place a small dia=
meter screwdriver or punch then hold the pushrod still while you unscrew th=
e diaphragm collar.<br><br>I could be wrong but I think that&#39;s how it i=
s done on the PBR.=C2=A0 On the Delphi/Lockheed unit you peel back the diap=
hragm and theres=C2=A0a metal sleeve that you pull out... works very differ=
ent to the PBR.<br><br>Best,<br><br>Alan</div></div><br><div class=3D"gmail=
_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Wed, Jun 1, 2022 at 1:40 A=
M Stephen Hutchings &lt;<a href=3D"mailto:[email-masked]">s.hutchin=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div style=3D"overflow-wrap: break-word;">Hello everyone,<div>=
<br></div><div>I=E2=80=99ve had a PBR VH44 brake servo on my car for over 2=
5 years, and I=E2=80=99ve found a source for a rebuild kit.</div><div>I was=
 looking to rebuild the unit, not because there=E2=80=99s anything wrong wi=
th it, but it&#39;s been in active service a long time, and I really don=E2=
=80=99t want to find out it=E2=80=99s failed the hard way.</div><div>I use =
Dot 5 silicone fluid (please let=E2=80=99s not get into that controversy ag=
ain!), and it would not be very good if that got sucked in to the engine vi=
a the manifold.</div><div><br></div><div>Anyway, I wonder if anyone out the=
re has rebuilt one of these units. I=E2=80=99ve attached a couple of photos=
 - one of the opened unit, and a close up of the end of the shaft that goes=
 into the cylinder bore.=C2=A0 I=E2=80=99m really not sure of how to releas=
e this gizmo=E2=80=A6and I don=E2=80=99t want to bugger it up, of course.</=
div><div>I will probably end up phoning the supplier in Australia (I=E2=80=
=99m in Canada), but I thought I=E2=80=99d check with the list first.</div>=
<div><br></div><div>Thanks,</div><div>Stephen, BJ8</div><div><br></div><div=
><img id=3D"gmail-m_40019750643500674795A99A00F-7017-4990-BC9C-A4F0E284F9B4=
" src=3D"cid:1811c9cf86e1fed76f11"><img id=3D"gmail-m_400197506435006747936=
BBD8CF-3920-49D4-B86D-A2CF9B54A548" src=3D"cid:1811c9cf86ecebb91c22"></div>=
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