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My thinking was that pressure may be escaping past worn accumulator piston =
rings and housing not allowing full pressure to build up ... ?
rg
----- Original Message -----
From: Michael Salter <michaelsalter@gmail.com>
To: Roger Grace <roggrace@telus.net>
Cc: healeylist <healeys@autox.team.net>
Sent: Mon, 25 May 2020 06:04:41 -0600 (MDT)
Subject: Re: [Healeys] Fwd: Re: Overdrive non return valve Question
Sorry but suggesting a replacement accumulator has me confused. If the pre=
ssure is staying up as described surely the accumulator is not leaking badl=
y ... what am I missing?M
On Mon., May 25, 2020, 12:10 a.m. Roger Grace, <roggrace@telus.net> wrote:
As you say you need need new accumulator piston/rings/sleeve and O-Rings.
This improved pressure on mine from 340 psi with very slow engaging to over=
550 psi.=20
Works fine now.
Suggest that you upgrade to the modern O ring style piston instead of the o=
riginal metal ring style.
If you were closer could let you have the extra new spring that I have, but=
Can border closed.
Overdrive Spares in UK are most helpful.
Good luck ...
rg
----- Original Message -----
From: jpaynepbr@cox.net
To: gradea1@charter.net
Cc: healeys@autox.team.net
Sent: Sun, 24 May 2020 20:21:52 -0600 (MDT)
Subject: Re: [Healeys] Overdrive non return valve Question
Shimmed the spring on the pump check valve by .08=E2=80=9D. Shope let me b=
orrow an accumulator spring that was 3/64=E2=80=9D longer. Up to over 450+ =
psi now. OD will engage with the rear jacked up, but not while driving. O=
n jack stands, when OD is engaged, drops to +/- 410 psi then quickly comes =
back up to 450+. Did not change out accumulator piston/rings/sleeve or O-Ri=
ngs yet, was hoping to avoid that. Thinking about trying a 1/16=E2=80=9D wa=
sher to shim the accumulator spring or is it a lost cause? From:gradea1@=
charter.net <gradea1@charter.net>=20
Sent: Sunday, May 24, 2020 10:26 AM
To: 'jpaynepbr@cox.net' <jpaynepbr@cox.net>
Cc: 'healeys@autox.team.net' <healeys@autox.team.net>
Subject: RE: [Healeys] Overdrive non return valve Question OD Pressure shou=
ld be much higher-could be 600 PSI. As I previously stated, be sure that th=
e ball in the operating valve is the correct size- 1/4" OD in pump valve. T=
he upper valve uses a 5/16" OD ball and you cannot mix them up, our your pr=
essure will not be there. Too large or small a ball will not seat in the va=
lve chamber. Also, if replacing with a new ball and spring, take a brass dr=
ift and "seat" the ball in its position. What is the condition of the pisto=
n rings and O rings...they must be up to the task as well for them to hold =
that huge pressure. Use sealant on all gaskets and in addition the brake ri=
ng seal to each side of the case (ignore the passage in the workshop book t=
hat says no sealant there-just be careful when applying it). Hank----------=
-------------------------------From: jpaynepbr@cox.net
To: healeys@autox.team.net
Cc:=20
Sent: Saturday May 23 2020 5:36:24PM
Subject: [Healeys] Overdrive non return valve Question
So I pressure tested the OD at the operating valve plug =E2=80=93 370 PSI a=
t 1,000 RPM in 4th. Drops to about 340 PSI when I attempt to engage the O=
D. OD did not engage.This is with the back end on jack stands (not the reca=
lled ones!), so it is under no load.Held 150 PSI for about 20 minutes after=
being shut off and then took about 2 hours to drop below 100 PSI. At leas=
t I now have a better understanding of why these things leak so badly. Who=
in their right mind would design something to hold that sort of residual o=
il pressure?Based on all the reading, pressure is too low, but nothing appe=
ars way off?I=E2=80=99m using the Team.Net Tech site. http://www.team.ne=
t/www/healey/tech/big_hly/od/delborder_od.html
Next step is to check the non return valve spring. Question, why would I =
take it to a machinist to add .084=E2=80=9D to the head of the little plung=
er instead of just putting a washer on the back side of the head of the plu=
nger? If the stem length/ insertion length into spring is that important, =
couldn=E2=80=99t I could add length to that at home with my mig welder and =
file it so that the spring moves freely and doesn=E2=80=99t hang up? From =
the team.net site :psi, but for proper operation, the pressure should be at=
470 to 490 psi.Now, finally... the OD low oil pressure cause and fix. A fa=
tigued spring in the non-return valve portion of the OD (see Fig. 6.19). Wh=
at? Is that it? You must be kidding - I waited two months for this? Yes, it=
does seem sort of anti-climactic, but this spring can cause major frustrat=
ion. Springs are like people - as they age, they get shorter and weaker. As=
you can see in Fig. 6.19, the spring pushes against a ball and plunger. Th=
e purpose of this spring is to allow the ball to lift from its seat at each=
power stroke of the OD pump, allowing oil to flow into the pressurized acc=
umulating chamber, =20
_______________________________________________
Archive: http://www.team.net/pipermail/healeyshttp://autox.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
lter@gmail.com
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<html><head><style> body {height: 100%; color:#000000; font-size:12pt; font=
-family:arial,helvetica,sans-serif;}</style></head><body><div>My thinking w=
as that pressure may be escaping past worn accumulator piston rings and hou=
sing not allowing full pressure to build up ... ?<br></div><div>rg<br></div=
><div><br data-mce-bogus=3D"1"></div><div>----- Original Message -----<br>F=
rom: Michael Salter <michaelsalter@gmail.com><br>To: Roger Grace <=
roggrace@telus.net><br>Cc: healeylist <healeys@autox.team.net><br>=
Sent: Mon, 25 May 2020 06:04:41 -0600 (MDT)<br>Subject: Re: [Healeys] Fwd: =
Re: Overdrive non return valve Question<br></div><div><br></div><div dir=3D=
"auto">Sorry but suggesting a replacement accumulator has me confused. =
; If the pressure is staying up as described surely the accumulator is not =
leaking badly ... what am I missing?<div dir=3D"auto">M</div></div><div><br=
></div><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On =
Mon., May 25, 2020, 12:10 a.m. Roger Grace, <<a href=3D"mailto:roggrace@=
telus.net" target=3D"_blank" data-mce-href=3D"mailto:roggrace@telus.net";>ro=
ggrace@telus.net</a>> wrote:<br></div><blockquote class=3D"gmail_quote" =
style=3D"margin: 0 0 0 .8ex; border-left: 1px #ccc solid; padding-left: 1ex=
;" data-mce-style=3D"margin: 0 0 0 .8ex; border-left: 1px #ccc solid; paddi=
ng-left: 1ex;"><div><div><br></div><div><br></div><div><br></div><div>As yo=
u say you need need new accumulator piston/rings/sleeve and O-Rings.<br></d=
iv><div>This improved pressure on mine from 340 psi with very slow engaging=
to over 550 psi. <br></div><div>Works fine now.<br></div><div>Suggest that=
you upgrade to the modern O ring style piston instead of the original meta=
l ring style.<br></div><div>If you were closer could let you have the extra=
new spring that I have, but Can border closed.<br></div><div>Overdrive Spa=
res in UK are most helpful.<br></div><div>Good luck ...<br></div><div>rg<br=
></div><div><br></div><div>----- Original Message -----<br>From: <a href=3D=
"mailto:jpaynepbr@cox.net"; target=3D"_blank" rel=3D"noreferrer" data-mce-hr=
ef=3D"mailto:jpaynepbr@cox.net";>jpaynepbr@cox.net</a><br>To: <a href=3D"mai=
lto:gradea1@charter.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=
=3D"mailto:gradea1@charter.net";>gradea1@charter.net</a><br>Cc: <a href=3D"m=
ailto:healeys@autox.team.net" target=3D"_blank" rel=3D"noreferrer" data-mce=
-href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br>Sent:=
Sun, 24 May 2020 20:21:52 -0600 (MDT)<br>Subject: Re: [Healeys] Overdrive =
non return valve Question<br></div><div><br></div><div><p class=3D"MsoNorma=
l">Shimmed the spring on the pump check valve by .08=E2=80=9D. </p><p =
class=3D"MsoNormal"> </p><p class=3D"MsoNormal">Shope let me borrow an=
accumulator spring that was 3/64=E2=80=9D longer.</p><p class=3D"MsoNormal=
"> </p><p class=3D"MsoNormal">Up to over 450+ psi now. OD will e=
ngage with the rear jacked up, but not while driving. On jack stands,=
when OD is engaged, drops to +/- 410 psi then quickly comes back up to 450=
+.</p><p class=3D"MsoNormal"> </p><p class=3D"MsoNormal">Did not chang=
e out accumulator piston/rings/sleeve or O-Rings yet, was hoping to avoid t=
hat.</p><p class=3D"MsoNormal"> </p><p class=3D"MsoNormal">Thinking ab=
out trying a 1/16=E2=80=9D washer to shim the accumulator spring or is it a=
lost cause? </p><p class=3D"MsoNormal"> </p><p class=3D"MsoNorma=
l"> </p><p class=3D"MsoNormal"> </p><div><div style=3D"border: no=
ne; border-top: solid #e1e1e1 1.0pt; padding: 3.0pt 0in 0in 0in;" data-mce-=
style=3D"border: none; border-top: solid #e1e1e1 1.0pt; padding: 3.0pt 0in =
0in 0in;"><p class=3D"MsoNormal"><b>From:</b><a href=3D"mailto:gradea1@char=
ter.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto:grade=
a1@charter.net">gradea1@charter.net</a> <<a href=3D"mailto:gradea1@chart=
er.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto:gradea=
1@charter.net">gradea1@charter.net</a>> <br><b>Sent:</b> Sunday, May 24,=
2020 10:26 AM<br><b>To:</b> '<a href=3D"mailto:jpaynepbr@cox.net"; target=
=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto:jpaynepbr@cox.net";>j=
paynepbr@cox.net</a>' <<a href=3D"mailto:jpaynepbr@cox.net"; target=3D"_b=
lank" rel=3D"noreferrer" data-mce-href=3D"mailto:jpaynepbr@cox.net";>jpaynep=
br@cox.net</a>><br><b>Cc:</b> '<a href=3D"mailto:healeys@autox.team.net"=
target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto:healeys@autox=
.team.net">healeys@autox.team.net</a>' <<a href=3D"mailto:healeys@autox.=
team.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto:heal=
eys@autox.team.net">healeys@autox.team.net</a>><br><b>Subject:</b> RE: [=
Healeys] Overdrive non return valve Question</p></div></div><p class=3D"Mso=
Normal"> </p><p class=3D"MsoNormal" style=3D"margin-bottom: 12.0pt;" d=
ata-mce-style=3D"margin-bottom: 12.0pt;">OD Pressure should be much higher-=
could be 600 PSI. As I previously stated, be sure that the ball in the oper=
ating valve is the correct size- 1/4" OD in pump valve. The upper valve use=
s a 5/16" OD ball and you cannot mix them up, our your pressure will not be=
there. Too large or small a ball will not seat in the valve chamber. Also,=
if replacing with a new ball and spring, take a brass drift and "seat" the=
ball in its position. What is the condition of the piston rings and O ring=
s...they must be up to the task as well for them to hold that huge pressure=
. Use sealant on all gaskets and in addition the brake ring seal to each si=
de of the case (ignore the passage in the workshop book that says no sealan=
t there-just be careful when applying it). Hank</p><p>---------------------=
--------------------</p><p class=3D"MsoNormal">From: <a href=3D"mailto:jpay=
nepbr@cox.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailto=
:jpaynepbr@cox.net">jpaynepbr@cox.net</a><br>To: <a href=3D"mailto:healeys@=
autox.team.net" target=3D"_blank" rel=3D"noreferrer" data-mce-href=3D"mailt=
o:healeys@autox.team.net">healeys@autox.team.net</a><br>Cc: <br>Sent: Satur=
day May 23 2020 5:36:24PM<br>Subject: [Healeys] Overdrive non return valve =
Question<br></p><div><br></div><p class=3D"MsoNormal"><span style=3D"font-s=
ize: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-style=3D"font-=
size: 12.0pt; font-family: 'Times New Roman',serif;">So I pressure tested t=
he OD at the operating valve plug =E2=80=93 370 PSI at 1,000 RPM in 4<sup>t=
h</sup>. Drops to about 340 PSI when I attempt to engage the OD=
. OD did not engage.</span></p><p class=3D"MsoNormal"><span style=3D"font-s=
ize: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-style=3D"font-=
size: 12.0pt; font-family: 'Times New Roman',serif;">This is with the back =
end on jack stands (not the recalled ones!), so it is under no load.</span>=
</p><p class=3D"MsoNormal"><span style=3D"font-size: 12.0pt; font-family: '=
Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; font-family: =
'Times New Roman',serif;">Held 150 PSI for about 20 minutes after being shu=
t off and then took about 2 hours to drop below 100 PSI. At least I n=
ow have a better understanding of why these things leak so badly. Who=
in their right mind would design something to hold that sort of residual o=
il pressure?</span></p><p class=3D"MsoNormal"><span style=3D"font-size: 12.=
0pt; font-family: 'Times New Roman',serif;" data-mce-style=3D"font-size: 12=
.0pt; font-family: 'Times New Roman',serif;">Based on all the reading, pres=
sure is too low, but nothing appears way off?</span></p><p class=3D"MsoNorm=
al"><span style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;=
" data-mce-style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif=
;">I=E2=80=99m using the Team.Net Tech site. <a href=3D"h=
ttp://www.team.net/www/healey/tech/big_hly/od/delborder_od.html" target=3D"=
_blank" rel=3D"noreferrer" data-mce-href=3D"http://www.team.net/www/healey/=
tech/big_hly/od/delborder_od.html">http://www.team.net/www/healey/tech/big_=
hly/od/delborder_od.html</a></span><br></p><p class=3D"MsoNormal"><span sty=
le=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-st=
yle=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;"> </sp=
an></p><p class=3D"MsoNormal"><span style=3D"font-size: 12.0pt; font-family=
: 'Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; font-famil=
y: 'Times New Roman',serif;">Next step is to check the non return valve spr=
ing. </span></p><p class=3D"MsoNormal"><span style=3D"font-size: 12.0pt; fo=
nt-family: 'Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; f=
ont-family: 'Times New Roman',serif;"> Question, why would I take it t=
o a machinist to add .084=E2=80=9D to the head of the little plunger instea=
d of just putting a washer on the back side of the head of the plunger?&nbs=
p; </span></p><p class=3D"MsoNormal"><span style=3D"font-size: 12.0pt; font=
-family: 'Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; fon=
t-family: 'Times New Roman',serif;">If the stem length/ insertion length in=
to spring is that important, couldn=E2=80=99t I could add length to that at=
home with my mig welder and file it so that the spring moves freely and do=
esn=E2=80=99t hang up? </span></p><p class=3D"MsoNormal"><span style=
=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-styl=
e=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;">From the <a =
href=3D"http://team.net"; target=3D"_blank" rel=3D"noreferrer" data-mce-href=
=3D"http://team.net";>team.net</a> site :</span></p><p class=3D"MsoNormal"><=
span style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;" dat=
a-mce-style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;">ps=
i, but for proper operation, the pressure should be at 470 to 490 psi.</spa=
n></p><p class=3D"MsoNormal"><span style=3D"font-size: 12.0pt; font-family:=
'Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; font-family=
: 'Times New Roman',serif;">Now, finally... the OD low oil pressure cause a=
nd fix. A <span style=3D"text-decoration: underline;" data-mce-style=3D"tex=
t-decoration: underline;">fatigued spring in the non-return valve portion o=
f the OD</span> (see Fig. 6.19). What? Is that it? You must be kidding - I =
waited two months for this? Yes, it does seem sort of anti-climactic, but t=
his spring can cause major frustration. Springs are like people - as they a=
ge, they get shorter and weaker. As you can see in Fig. 6.19, the spring pu=
shes against a ball and plunger. The purpose of this spring is to allow the=
ball to lift from its seat at each power stroke of the OD pump, allowing o=
il to flow into the pressurized accumulating chamber, </span><span style=3D=
"border: solid windowtext 1.0pt; padding: 0in;" data-mce-style=3D"border: s=
olid windowtext 1.0pt; padding: 0in;"><img style=3D"width: 3.8956in; height=
: 3.7043in;" id=3D"m_-5883881541091706504Picture_x0020_5" src=3D"#m_-588388=
1541091706504_" alt=3D"Image removed by sender. rework of the OD hydraulic =
pump valve" data-mce-src=3D"#m_-5883881541091706504_" data-mce-style=3D"wid=
th: 3.8956in; height: 3.7043in;" width=3D"374" height=3D"356" border=3D"0">=
</span></p><p class=3D"MsoNormal"> </p><p class=3D"MsoNormal"> </=
p></div><div><br></div><div><br></div></div>_______________________________=
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Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
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