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body {height: 100%; color:#000000; font-size:12pt; font-family:arial,helvet=
ica,sans-serif;}As you say you need need new accumulator piston/rings/sleev=
e 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
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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><br></div><di=
v><br></div><div><style>body {height: 100%; color:#000000; font-size:12pt; =
font-family:arial,helvetica,sans-serif;}</style></div><div>As you say you n=
eed need new accumulator piston/rings/sleeve and O-Rings.<br></div><div>Thi=
s improved pressure on mine from 340 psi with very slow engaging to over 55=
0 psi. <br></div><div>Works fine now.<br></div><div>Suggest that you upgrad=
e to the modern O ring style piston instead of the original metal ring styl=
e.<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 Spares in UK a=
re most helpful.<br></div><div>Good luck ...<br></div><div>rg<br></div><div=
><br></div><div>----- Original Message -----<br>From: jpaynepbr@cox.net<br>=
To: gradea1@charter.net<br>Cc: healeys@autox.team.net<br>Sent: Sun, 24 May =
2020 20:21:52 -0600 (MDT)<br>Subject: Re: [Healeys] Overdrive non return va=
lve Question<br></div><div><br></div><div class=3D"WordSection1"><p class=
=3D"MsoNormal">Shimmed the spring on the pump check valve by .08=E2=80=9D.&=
nbsp;</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.&nb=
sp; OD will engage with the rear jacked up, but not while driving. On=
jack stands, when OD is engaged, drops to +/- 410 psi then quickly comes b=
ack up to 450+.</p><p class=3D"MsoNormal"> </p><p class=3D"MsoNormal">=
Did not change out accumulator piston/rings/sleeve or O-Rings yet, was hopi=
ng to avoid that.</p><p class=3D"MsoNormal"> </p><p class=3D"MsoNormal=
">Thinking about trying a 1/16=E2=80=9D washer to shim the accumulator spri=
ng or is it a lost cause? </p><p class=3D"MsoNormal"> </p><p clas=
s=3D"MsoNormal"> </p><p class=3D"MsoNormal"> </p><div><div style=
=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt 0in 0in 0=
in;" data-mce-style=3D"border: none; border-top: solid #E1E1E1 1.0pt; paddi=
ng: 3.0pt 0in 0in 0in;"><p class=3D"MsoNormal"><b>From:</b> gradea1@charter=
.net <gradea1@charter.net> <br><b>Sent:</b> Sunday, May 24, 2020 10:2=
6 AM<br><b>To:</b> 'jpaynepbr@cox.net' <jpaynepbr@cox.net><br><b>Cc:<=
/b> 'healeys@autox.team.net' <healeys@autox.team.net><br><b>Subject:<=
/b> RE: [Healeys] Overdrive non return valve Question</p></div></div><p cla=
ss=3D"MsoNormal"> </p><p class=3D"MsoNormal" style=3D"margin-bottom: 1=
2.0pt;" data-mce-style=3D"margin-bottom: 12.0pt;">OD Pressure should be muc=
h higher-could be 600 PSI. As I previously stated, be sure that the ball in=
the operating valve is the correct size- 1/4" OD in pump valve. The upper =
valve uses a 5/16" OD ball and you cannot mix them up, our your pressure wi=
ll not be there. Too large or small a ball will not seat in the valve chamb=
er. 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 a=
nd 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 ring seal t=
o each side of the case (ignore the passage in the workshop book that says =
no sealant there-just be careful when applying it). Hank</p><p>------------=
-----------------------------</p><p class=3D"MsoNormal">From: jpaynepbr@cox=
.net<br>To: healeys@autox.team.net<br>Cc: <br>Sent: Saturday May 23 2020 5:=
36:24PM<br>Subject: [Healeys] Overdrive non return valve Question<br></p><d=
iv><br></div><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-=
margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-m=
argin-bottom-alt: auto;"><span style=3D"font-size: 12.0pt; font-family: 'Ti=
mes New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; font-family: 'T=
imes New Roman',serif;">So I pressure tested the OD at the operating valve =
plug =E2=80=93 370 PSI at 1,000 RPM in 4<sup>th</sup>. Drops to=
about 340 PSI when I attempt to engage the OD. OD did not engage.</span></=
p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bott=
om-alt: auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-botto=
m-alt: auto;"><span style=3D"font-size: 12.0pt; font-family: 'Times New Rom=
an',serif;" data-mce-style=3D"font-size: 12.0pt; font-family: 'Times New Ro=
man',serif;">This is with the back end on jack stands (not the recalled one=
s!), so it is under no load.</span></p><p class=3D"MsoNormal" style=3D"mso-=
margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-m=
argin-top-alt: auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size=
: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-style=3D"font-siz=
e: 12.0pt; font-family: 'Times New Roman',serif;">Held 150 PSI for about 20=
minutes after being shut off and then took about 2 hours to drop below 100=
PSI. At least 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 oil pressure?</span></p><p class=3D"MsoNormal" style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=
=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><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, pressure is too low, but nothing appears way off?</span></p><p cl=
ass=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt:=
auto;" data-mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: =
auto;"><span style=3D"font-size: 12.0pt; font-family: 'Times New Roman',ser=
if;" data-mce-style=3D"font-size: 12.0pt; font-family: 'Times New Roman',se=
rif;">I=E2=80=99m using the Team.Net Tech site. <a href=
=3D"http://www.team.net/www/healey/tech/big_hly/od/delborder_od.html"; targe=
t=3D"_blank" data-mce-href=3D"http://www.team.net/www/healey/tech/big_hly/o=
d/delborder_od.html">http://www.team.net/www/healey/tech/big_hly/od/delbord=
er_od.html</a></span><br></p><p class=3D"MsoNormal" style=3D"mso-margin-top=
-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-=
alt: auto; mso-margin-bottom-alt: auto;"><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;"> </span></p><p class=3D"MsoNor=
mal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><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;">Next st=
ep is to check the non return valve spring. </span></p><p class=3D"MsoNorma=
l" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mc=
e-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span st=
yle=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;" data-mce-s=
tyle=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;"> Que=
stion, why would I take it to a machinist to add .084=E2=80=9D to the head =
of the little plunger instead of just putting a washer on the back side of =
the head of the plunger? </span></p><p class=3D"MsoNormal" style=3D"m=
so-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"ms=
o-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><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;">If the stem length/ in=
sertion 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 mo=
ves freely and doesn=E2=80=99t hang up? </span></p><p class=3D"MsoNor=
mal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;" data-=
mce-style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><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;">From th=
e team.net site :</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-=
alt: auto; mso-margin-bottom-alt: auto;" data-mce-style=3D"mso-margin-top-a=
lt: auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 12.0pt; f=
ont-family: 'Times New Roman',serif;" data-mce-style=3D"font-size: 12.0pt; =
font-family: 'Times New Roman',serif;">psi, but for proper operation, the p=
ressure should be at 470 to 490 psi.</span></p><p class=3D"MsoNormal"><span=
style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;" data-mc=
e-style=3D"font-size: 12.0pt; font-family: 'Times New Roman',serif;">Now, f=
inally... the OD low oil pressure cause and fix. A <span style=3D"text-deco=
ration: underline;" data-mce-style=3D"text-decoration: underline;">fatigued=
spring in the non-return valve portion of the OD</span> (see Fig. 6.19). W=
hat? Is that it? You must be kidding - I waited two months for this? Yes, i=
t does seem sort of anti-climactic, but this spring can cause major frustra=
tion. Springs are like people - as they age, they get shorter and weaker. A=
s you can see in Fig. 6.19, the spring pushes against a ball and plunger. T=
he purpose of this spring is to allow the ball to lift from its seat at eac=
h power stroke of the OD pump, allowing oil to flow into the pressurized ac=
cumulating chamber, </span><span style=3D"border: solid windowtext 1.0pt; p=
adding: 0in;" data-mce-style=3D"border: solid windowtext 1.0pt; padding: 0i=
n;"><img style=3D"width: 3.8956in; height: 3.7043in;" id=3D"Picture_x0020_5=
" src=3D"#" alt=3D"Image removed by sender. rework of the OD hydraulic pump=
valve" data-mce-src=3D"#" data-mce-style=3D"width: 3.8956in; height: 3.704=
3in;" width=3D"374" height=3D"356" border=3D"0"></span></p><p class=3D"MsoN=
ormal"> </p><p class=3D"MsoNormal"> </p></div><div><br></div><div=
><br></div></body></html>
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