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Re: [Healeys] Overdrive pressure not releasing.

To: simon.lachlan@alexarevel.plus.com
Subject: Re: [Healeys] Overdrive pressure not releasing.
From: Roger Grace via Healeys <healeys@autox.team.net>
Date: Mon, 18 Apr 2022 08:03:29 -0700
Cc: Healeys <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <000a01d851b6$20733af0$6159b0d0$@alexarevel.plus.com> <CAB3i7LK3kuvn6iBp696_bShjF--APkBQX+07eBNBmsRQDptW8A@mail.gmail.com> <5aba3e49-649e-50c5-9c6d-547ea1f0fbd8@comcast.net> <CAB3i7LJxomfqn1w=1h5N9nbiXRVnY9babKt__E4FveBt+N0QYQ@mail.gmail.com> <53bf49c1-4be7-060e-9002-0ea39f2e9194@comcast.net> <002b01d852a9$6d6c62c0$48452840$@alexarevel.plus.com>
--===============8504088224404917848==

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Content-Transfer-Encoding: quoted-printable

To confirm Michae's analysis, consider:
  remove ball, spring and plunger
  remove the valve push rod and inspect - I use a piece of steel wire of
appropriate thickness to pry out.
  replace the push rod - it should go in smoothly
  insert the wire again and push down gently; with your other hand operate
the cam and you should feel the operating rod move up and down on the cam.
 if not MS is correct and the pin/peg has failed....
 of course it could also be the cotter pin that goes through the setting
lever - but less likely IMO
BTW I have found that my OD (O rings) holds 400 psi for several days.
rg



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On Sun, Apr 17, 2022 at 3:21 PM Simon Lachlan via Healeys <
healeys@autox.team.net> wrote:

> That=E2=80=99s the one I=E2=80=99ve got. I did get an increase in pressur=
e. No question
> about that.
>
> I talked to Dave at OD Spares with regard to the various accumulators out
> there at the moment. I don=E2=80=99t recall exactly but he supplies all o=
f them to
> his customers and, I think, to the suppliers.
>
> Simon
>
>
>
> *From:* Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Bob
> Spidell
> *Sent:* 17 April 2022 23:06
> *To:* Michael Salter <michaelsalter@gmail.com>
> *Cc:* healeys@autox.team.net
> *Subject:* Re: [Healeys] Overdrive pressure not releasing.
>
>
>
> AH Spares has an accumulator and piston which uses an O-ring. It appears
> the pressure relief hole is chamfered:
>
>
> https://www.ahspares.co.uk/austin-healey/performance-parts/gearbox-overdr=
ive/o-ring-conversion-accumulator-piston.aspx
>
> On 4/17/2022 12:03 PM, Michael Salter wrote:
>
> Actually Bob I've never used an  "O" ringed accumulator.
>
> I spent a little time many years back looking into using "O" rings on the
> accumulator but couldn't resolve the issue of the ring being chaffed when
> passing over the radial drillings in the accumulator body.
>
> Does anyone know how that has been solved?
>
>
>
> M
>
>
>
> On Sun., Apr. 17, 2022, 2:49 p.m. Bob Spidell, <bspidell@comcast.net>
> wrote:
>
> Michael,
>
> Sounds like you're implying the O-ringed accumulator is superior to the
> metal ring (OEM) type? Wish I'd known about it when I rebuilt my O/D (I
> bought the DWM 'uprated' accumulator).
>
> I'll throw out another, very unlikely, potential cause: the cone clutch
> could be stuck together. I've heard of this happening, but have never
> experienced it my self--nor has anyone I know--but it's theoretically
> possible (esp. if the clutch is excessively worn). Could this be the reas=
on
> the manual is adamant about replacing the 8 strong springs, of two length=
s,
> that oppose the operating pistons on overhaul, regardless if they still
> seem robust?
>
> On 4/17/2022 9:31 AM, Michael Salter via Healeys wrote:
>
> Simon,
>
> Based upon your synopsis I conclude that the operating valve is NOT
> opening when either the solenoid lever or the setting lever is being move=
d
> to the position where the operating valve ball would normally be lifted o=
ff
> its seat.
>
> This conclusion is based upon your discovery that the pressure in the
> accumulator, as indicated on the gauge, does not leak away overnight.
>
> There is a small clearance between the operating valve push rod and the
> overdrive housing. If the operating valve ball was indeed lifted off its
> seat all the oil in the accumulator would, over time, leak past the
> operating rod thus discharge the accumulator.
>
> This process would indeed take some time but would certainly completely
> relieve most, if not all the residual accumulator pressure overnight.
>
> If however the operating valve ball is still in contact with its seat
> (i.e. not being lifted) the oil pressure would not reach the small
> clearance between the valve push rod and the housing and, other than past
> the accumulator rings there is nowhere for that pressure to be relieved.
>
> I would presume that Overdrive Spares installed an accumulator with an "O=
"
> ring rather than the original cast iron rings. If the original type
> accumulator piston was still fitted, oil would seep past the cast iron
> rings to relieve the pressure, albeit very slowly, and again the
> accumulator pressure would be discharged overnight..
>
> The cam on the operating shaft, the one which lifts the operating valve
> push rod and thus the operating valve ball, is locked to the shaft with a
> small taper pin. I would guess that the taper pin has either fallen out o=
r
> sheared.
>
> Bad news is that this pin cannot be accessed without removing and
> disassembling the overdrive.
>
>
>
> M
>
>
>
> On Sat, Apr 16, 2022 at 1:19 PM Simon Lachlan via Healeys <
> healeys@autox.team.net> wrote:
>
> My OD is driving me mad and I definitely need some inspired advice. A bit
> of background first. I=E2=80=99ll try to lay out all the facts in a logic=
al
> sequence. (I=E2=80=99m increasingly reluctant to link ODs with logic!)
>
>    1. I=E2=80=99d say that the OD has done +/- 15k miles since a total re=
build by
>    Overdrive Spares here in UK.
>    2. The OD had issues before Christmas (21) and was sorted out by OD
>    Spares. The accumulator was uprated and pressure issues sorted.
>    3. OD functioned 100% on the few times I=E2=80=99d been able to take i=
t out
>    since then until..
>    4. One day, the OD stopped functioning.
>    5. I checked the electrics. All fine there so I delved a bit deeper.
>    6. It had fried its solenoid which I replaced. But=E2=80=A6
>    7. That did not fix the problem so=E2=80=A6
>    8. I decided that the operating valve=E2=80=99s adjustment might be of=
f so..
>    9. I bought a dial gauge and hoped to sort it out precisely rather
>    than by =E2=80=9Cfeel=E2=80=9D, which I lack in this area.
>    10. Prior to using the gauge I decided to see if the OD was
>    functioning at all so I raised the car on stands and fitted my pressur=
e
>    gauge.
>    11. I get a reading of 500psi rising a bit when I rev the engine but
>    I=E2=80=99d suppose that would drop when the oil warms up.
>    12. BUT, and this is where things go pear-shaped=E2=80=A6moving the li=
ttle
>    lever on the RHS up and down does not engage/disengage OD. There is no
>    change on the gauge to show OD engaging or disengaging.
>    13. AND, the gauge stays at 500psi even when the engine is off. Moving
>    the lever 20 times has zero effect. Stayed at 500 overnight!
>    14. Of course, I checked for dirt in the operating valve area. None.
>    15. Likewise, the tiny hole in the =E2=80=9Cvalve =E2=80=93 operating=
=E2=80=9D (the spindle
>    thing which the ball sits on)=E2=80=A6.that=E2=80=99s clear. And surel=
y, the pressure would
>    diminish overnight if something in that area was partially obstructed?
>    16. When I remove the pressure valve, there=E2=80=99s a small spillage=
 =E2=80=93 no
>    more than you=E2=80=99d expect =E2=80=93 but repeating the pressure ga=
uge process only
>    returns the same results.
>    17. I see in the bible according to Norman Nock that =E2=80=9CHolding =
this
>    lever with your thumb and index finger, you should be able to push the
>    lever down lightly about =E2=85=9C=E2=80=9D until you feel a slight sp=
ring pressure
>    resistance. The lever should go down another =C2=BC=E2=80=9D after enc=
ountering the
>    resistance=E2=80=A6=E2=80=A6=E2=80=9D ie there=E2=80=99s about =E2=85=
=9D=E2=80=9D movement up & down in that lever. Well,
>    my lever does move and does lift the ball, but there=E2=80=99s not =E2=
=85=9D=E2=80=9D movement
>    there. Could that be the problem area???
>    18. Almost finished=E2=80=A6keep reading!
>
> So, I=E2=80=99m stumped. Every time I learn something new about the OD, i=
t has a
> new trick to baffle me.
>
> I=E2=80=99ve no 100% sure way of telling whether it=E2=80=99s gone into O=
D  and stuck
> there or whether it=E2=80=99s simply not going into OD at all.
>
> I=E2=80=99ve done a lot of reading through my books and collection of adv=
ice from
> the various gurus and found reference to ODs being stuck but those seemed
> to be to do with =E2=80=9Cweak springs=E2=80=9D which, particularly after=
 a long lay-off,
> wouldn=E2=80=99t disengage. The cure for this being a good smack on the s=
teel plate
> sandwiched in the OD from below. Well, that seems to be a stuck mechanism
> issue whereas I=E2=80=99m facing a hydraulic conundrum. Or am I?
>
> There is what is usually referred to as the =E2=80=9Cpressure relief valv=
e=E2=80=9D
> adjacent to the accumulator. The name suggested that pressure might be
> stuck in that area=E2=80=A6.but surely not overnight?
>
>
>
> Any ideas? I am particularly reluctant to take the gearbox and OD out.
> You=E2=80=99ll recall the ridiculous business of the defective clutch kit=
? Well, I
> forget whether we had the box in and out 3 times or 4. I=E2=80=99d hoped =
not to do
> it again so soon or ever for that matter.
>
>
>
> I=E2=80=99m hoping for a miracle of course but some sound advice would be=
 a
> godsend=E2=80=A6=E2=80=A6=E2=80=A6=E2=80=A6
>
>
>
> Thanks,
>
> Simon
>
>
>
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<div dir=3D"ltr"><div>To confirm Michae&#39;s analysis, consider:</div><div=
>=C2=A0 remove ball, spring and plunger<br></div><div>=C2=A0 remove the val=
ve push rod and inspect - I use a piece of steel wire of appropriate thickn=
ess to pry out.<br></div><div>=C2=A0 replace the push rod - it should go in=
 smoothly<br></div><div>=C2=A0 insert the wire again and push down gently; =
with your other hand operate the cam and you should feel the operating rod =
move up and down on the cam.<br></div><div>=C2=A0if not MS is correct and t=
he pin/peg has failed....</div><div>=C2=A0of course it could also be the co=
tter pin that goes through the setting lever - but less likely IMO<br></div=
><div>BTW I have found that my OD (O rings) holds 400 psi for several days.=
</div><div>rg<br></div><div><br></div><div><br></div></div><div id=3D"DAB4F=
AD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
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</table><a href=3D"#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width=3D"1" heigh=
t=3D"1"></a></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"=
gmail_attr">On Sun, Apr 17, 2022 at 3:21 PM Simon Lachlan via Healeys &lt;<=
a href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a>&gt; wro=
te:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px =
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang=3D=
"EN-GB"><div class=3D"gmail-m_246696034598963678WordSection1"><p class=3D"M=
soNormal"><span>That=E2=80=99s the one I=E2=80=99ve got. I did get an incre=
ase in pressure. No question about that.<u></u><u></u></span></p><p class=
=3D"MsoNormal"><span>I talked to Dave at OD Spares with regard to the vario=
us accumulators out there at the moment. I don=E2=80=99t recall exactly but=
 he supplies all of them to his customers and, I think, to the suppliers.<u=
></u><u></u></span></p><p class=3D"MsoNormal"><span>Simon<u></u><u></u></sp=
an></p><p class=3D"MsoNormal"><span><u></u>=C2=A0<u></u></span></p><div><di=
v style=3D"border-color:rgb(225,225,225) currentcolor currentcolor;border-s=
tyle:solid none none;border-width:1pt medium medium;padding:3pt 0cm 0cm"><p=
 class=3D"MsoNormal"><b><span lang=3D"EN-US">From:</span></b><span lang=3D"=
EN-US"> Healeys &lt;<a href=3D"mailto:healeys-bounces@autox.team.net"; targe=
t=3D"_blank">healeys-bounces@autox.team.net</a>&gt; <b>On Behalf Of </b>Bob=
 Spidell<br><b>Sent:</b> 17 April 2022 23:06<br><b>To:</b> Michael Salter &=
lt;<a href=3D"mailto:michaelsalter@gmail.com"; target=3D"_blank">michaelsalt=
er@gmail.com</a>&gt;<br><b>Cc:</b> <a href=3D"mailto:healeys@autox.team.net=
" target=3D"_blank">healeys@autox.team.net</a><br><b>Subject:</b> Re: [Heal=
eys] Overdrive pressure not releasing.<u></u><u></u></span></p></div></div>=
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><p class=3D"MsoNormal" style=
=3D"margin-bottom:12pt">AH Spares has an accumulator and piston which uses =
an O-ring. It appears the pressure relief hole is chamfered:<br><br><a href=
=3D"https://www.ahspares.co.uk/austin-healey/performance-parts/gearbox-over=
drive/o-ring-conversion-accumulator-piston.aspx" target=3D"_blank">https://=
www.ahspares.co.uk/austin-healey/performance-parts/gearbox-overdrive/o-ring=
-conversion-accumulator-piston.aspx</a><br><br><u></u><u></u></p><div><p cl=
ass=3D"MsoNormal">On 4/17/2022 12:03 PM, Michael Salter wrote:<u></u><u></u=
></p></div><blockquote style=3D"margin-top:5pt;margin-bottom:5pt"><div><p c=
lass=3D"MsoNormal">Actually Bob I&#39;ve never used an=C2=A0 &quot;O&quot; =
ringed accumulator.=C2=A0 <u></u><u></u></p><div><p class=3D"MsoNormal">I s=
pent a little time many years back looking into using &quot;O&quot; rings o=
n the accumulator but couldn&#39;t resolve the issue of the ring being chaf=
fed when passing over the radial drillings in the accumulator body.=C2=A0<u=
></u><u></u></p></div><div><p class=3D"MsoNormal">Does anyone know how that=
 has been solved?<u></u><u></u></p></div><div><p class=3D"MsoNormal"><u></u=
>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal">M<u></u><u></u></p></di=
v></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div><p class=
=3D"MsoNormal">On Sun., Apr. 17, 2022, 2:49 p.m. Bob Spidell, &lt;<a href=
=3D"mailto:bspidell@comcast.net"; target=3D"_blank">bspidell@comcast.net</a>=
&gt; wrote:<u></u><u></u></p></div><blockquote style=3D"border-color:curren=
tcolor currentcolor currentcolor rgb(204,204,204);border-style:none none no=
ne solid;border-width:medium medium medium 1pt;padding:0cm 0cm 0cm 6pt;marg=
in-left:4.8pt;margin-right:0cm"><div><p class=3D"MsoNormal" style=3D"margin=
-bottom:12pt">Michael, <br><br>Sounds like you&#39;re implying the O-ringed=
 accumulator is superior to the metal ring (OEM) type? Wish I&#39;d known a=
bout it when I rebuilt my O/D (I bought the DWM &#39;uprated&#39; accumulat=
or).<br><br>I&#39;ll throw out another, very unlikely, potential cause: the=
 cone clutch could be stuck together. I&#39;ve heard of this happening, but=
 have never experienced it my self--nor has anyone I know--but it&#39;s the=
oretically possible (esp. if the clutch is excessively worn). Could this be=
 the reason the manual is adamant about replacing the 8 strong springs, of =
two lengths, that oppose the operating pistons on overhaul, regardless if t=
hey still seem robust?<br><br><u></u><u></u></p><div><p class=3D"MsoNormal"=
>On 4/17/2022 9:31 AM, Michael Salter via Healeys wrote:<u></u><u></u></p><=
/div><blockquote style=3D"margin-top:5pt;margin-bottom:5pt"><div><div><p cl=
ass=3D"MsoNormal"><span style=3D"font-size:12pt;font-family:&quot;Arial&quo=
t;,sans-serif">Simon,<u></u><u></u></span></p></div><div><p class=3D"MsoNor=
mal"><span style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif=
">Based upon your synopsis I conclude that the operating valve is NOT openi=
ng when either the solenoid lever or the setting lever is being moved to th=
e position where the operating valve ball would normally be lifted off its =
seat.<u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span style=
=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">This conclusio=
n is based upon your discovery that the pressure in the accumulator, as ind=
icated on the gauge, does not leak away overnight.<u></u><u></u></span></p>=
</div><div><p class=3D"MsoNormal"><span style=3D"font-size:12pt;font-family=
:&quot;Arial&quot;,sans-serif">There is a small clearance between the opera=
ting valve push rod and the overdrive housing. If the operating valve ball =
was indeed lifted off its seat all the oil in the accumulator would, over t=
ime, leak past the operating rod thus discharge the accumulator. <u></u><u>=
</u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"font-size:1=
2pt;font-family:&quot;Arial&quot;,sans-serif">This process would indeed tak=
e some time but would certainly completely relieve most, if not all the res=
idual accumulator pressure overnight.<u></u><u></u></span></p></div><div><p=
 class=3D"MsoNormal"><span style=3D"font-size:12pt;font-family:&quot;Arial&=
quot;,sans-serif">If however the operating valve ball is still in contact w=
ith its seat (i.e. not being lifted) the oil pressure would not reach the s=
mall clearance between the valve push rod and the housing and, other than p=
ast the accumulator rings there is nowhere for that pressure to be relieved=
. <u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D=
"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">I would presume t=
hat Overdrive Spares installed an accumulator with an &quot;O&quot; ring ra=
ther than the original cast iron rings. If the original type accumulator pi=
ston was still fitted, oil would seep past the cast iron rings to relieve t=
he pressure, albeit very slowly, and again the accumulator pressure would b=
e discharged overnight..<u></u><u></u></span></p></div><div><p class=3D"Mso=
Normal"><span style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-se=
rif">The cam on the operating shaft, the one which lifts the operating valv=
e push rod and thus the operating valve ball, is locked to the shaft with a=
 small taper pin. I would guess that the taper pin has either fallen out or=
 sheared. <u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span =
style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif">Bad news =
is that this pin cannot be accessed without removing and disassembling the =
overdrive.<u></u><u></u></span></p></div><div><p class=3D"MsoNormal"><span =
style=3D"font-size:12pt;font-family:&quot;Arial&quot;,sans-serif"><u></u>=
=C2=A0<u></u></span></p></div><div><p class=3D"MsoNormal"><span style=3D"fo=
nt-size:12pt;font-family:&quot;Arial&quot;,sans-serif">M<u></u><u></u></spa=
n></p></div></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><div>=
<p class=3D"MsoNormal">On Sat, Apr 16, 2022 at 1:19 PM Simon Lachlan via He=
aleys &lt;<a href=3D"mailto:healeys@autox.team.net"; target=3D"_blank">heale=
ys@autox.team.net</a>&gt; wrote:<u></u><u></u></p></div><blockquote style=
=3D"border-color:currentcolor currentcolor currentcolor rgb(204,204,204);bo=
rder-style:none none none solid;border-width:medium medium medium 1pt;paddi=
ng:0cm 0cm 0cm 6pt;margin-left:4.8pt;margin-right:0cm"><div><div><p class=
=3D"MsoNormal">My OD is driving me mad and I definitely need some inspired =
advice. A bit of background first. I=E2=80=99ll try to lay out all the fact=
s in a logical sequence. (I=E2=80=99m increasingly reluctant to link ODs wi=
th logic!)<u></u><u></u></p><ol type=3D"1" start=3D"1"><li class=3D"MsoNorm=
al">I=E2=80=99d say that the OD has done +/- 15k miles since a total rebuil=
d by Overdrive Spares here in UK.<u></u><u></u></li><li class=3D"MsoNormal"=
>The OD had issues before Christmas (21) and was sorted out by OD Spares. T=
he accumulator was uprated and pressure issues sorted.<u></u><u></u></li><l=
i class=3D"MsoNormal">OD functioned 100% on the few times I=E2=80=99d been =
able to take it out since then until..<u></u><u></u></li><li class=3D"MsoNo=
rmal">One day, the OD stopped functioning.<u></u><u></u></li><li class=3D"M=
soNormal">I checked the electrics. All fine there so I delved a bit deeper.=
<u></u><u></u></li><li class=3D"MsoNormal">It had fried its solenoid which =
I replaced. But=E2=80=A6<u></u><u></u></li><li class=3D"MsoNormal">That did=
 not fix the problem so=E2=80=A6<u></u><u></u></li><li class=3D"MsoNormal">=
I decided that the operating valve=E2=80=99s adjustment might be off so..<u=
></u><u></u></li><li class=3D"MsoNormal">I bought a dial gauge and hoped to=
 sort it out precisely rather than by =E2=80=9Cfeel=E2=80=9D, which I lack =
in this area.<u></u><u></u></li><li class=3D"MsoNormal">Prior to using the =
gauge I decided to see if the OD was functioning at all so I raised the car=
 on stands and fitted my pressure gauge.<u></u><u></u></li><li class=3D"Mso=
Normal">I get a reading of 500psi rising a bit when I rev the engine but I=
=E2=80=99d suppose that would drop when the oil warms up.<u></u><u></u></li=
><li class=3D"MsoNormal">BUT, and this is where things go pear-shaped=E2=80=
=A6moving the little lever on the RHS up and down does not engage/disengage=
 OD. There is no change on the gauge to show OD engaging or disengaging.<u>=
</u><u></u></li><li class=3D"MsoNormal">AND, the gauge stays at 500psi even=
 when the engine is off. Moving the lever 20 times has zero effect. Stayed =
at 500 overnight!<u></u><u></u></li><li class=3D"MsoNormal">Of course, I ch=
ecked for dirt in the operating valve area. None.<u></u><u></u></li><li cla=
ss=3D"MsoNormal">Likewise, the tiny hole in the =E2=80=9Cvalve =E2=80=93 op=
erating=E2=80=9D (the spindle thing which the ball sits on)=E2=80=A6.that=
=E2=80=99s clear. And surely, the pressure would diminish overnight if some=
thing in that area was partially obstructed?<u></u><u></u></li><li class=3D=
"MsoNormal">When I remove the pressure valve, there=E2=80=99s a small spill=
age =E2=80=93 no more than you=E2=80=99d expect =E2=80=93 but repeating the=
 pressure gauge process only returns the same results.<u></u><u></u></li><l=
i class=3D"MsoNormal">I see in the bible according to Norman Nock that =E2=
=80=9CHolding this lever with your thumb and index finger, you should be ab=
le to push the lever down lightly about =E2=85=9C=E2=80=9D until you feel a=
 slight spring pressure resistance. The lever should go down another =C2=BC=
=E2=80=9D after encountering the resistance=E2=80=A6=E2=80=A6=E2=80=9D ie t=
here=E2=80=99s about =E2=85=9D=E2=80=9D movement up &amp; down in that leve=
r. Well, my lever does move and does lift the ball, but there=E2=80=99s not=
 =E2=85=9D=E2=80=9D movement there. Could that be the problem area???<u></u=
><u></u></li><li class=3D"MsoNormal">Almost finished=E2=80=A6keep reading!<=
u></u><u></u></li></ol><p class=3D"MsoNormal" style=3D"margin-left:18pt">So=
, I=E2=80=99m stumped. Every time I learn something new about the OD, it ha=
s a new trick to baffle me.<u></u><u></u></p><p class=3D"MsoNormal" style=
=3D"margin-left:18pt">I=E2=80=99ve no 100% sure way of telling whether it=
=E2=80=99s gone into OD =C2=A0and stuck there or whether it=E2=80=99s simpl=
y not going into OD at all.<u></u><u></u></p><p class=3D"MsoNormal" style=
=3D"margin-left:18pt">I=E2=80=99ve done a lot of reading through my books a=
nd collection of advice from the various gurus and found reference to ODs b=
eing stuck but those seemed to be to do with =E2=80=9Cweak springs=E2=80=9D=
 which, particularly after a long lay-off, wouldn=E2=80=99t disengage. The =
cure for this being a good smack on the steel plate sandwiched in the OD fr=
om below. Well, that seems to be a stuck mechanism issue whereas I=E2=80=99=
m facing a hydraulic conundrum. Or am I?<u></u><u></u></p><p class=3D"MsoNo=
rmal" style=3D"margin-left:18pt">There is what is usually referred to as th=
e =E2=80=9Cpressure relief valve=E2=80=9D adjacent to the accumulator. The =
name suggested that pressure might be stuck in that area=E2=80=A6.but surel=
y not overnight?<u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-le=
ft:18pt">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal" style=3D"margin-lef=
t:18pt">Any ideas? I am particularly reluctant to take the gearbox and OD o=
ut. You=E2=80=99ll recall the ridiculous business of the defective clutch k=
it? Well, I forget whether we had the box in and out 3 times or 4. I=E2=80=
=99d hoped not to do it again so soon or ever for that matter.<u></u><u></u=
></p><p class=3D"MsoNormal" style=3D"margin-left:18pt">=C2=A0<u></u><u></u>=
</p><p class=3D"MsoNormal" style=3D"margin-left:18pt">I=E2=80=99m hoping fo=
r a miracle of course but some sound advice would be a godsend=E2=80=A6=E2=
=80=A6=E2=80=A6=E2=80=A6<u></u><u></u></p><p class=3D"MsoNormal" style=3D"m=
argin-left:18pt">=C2=A0<u></u><u></u></p><p class=3D"MsoNormal" style=3D"ma=
rgin-left:18pt">Thanks,<u></u><u></u></p><p class=3D"MsoNormal" style=3D"ma=
rgin-left:18pt">Simon<u></u><u></u></p><p class=3D"MsoNormal" style=3D"marg=
in-left:18pt">=C2=A0<u></u><u></u></p></div></div><p class=3D"MsoNormal" st=
yle=3D"margin-bottom:12pt">_______________________________________________<=
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