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Shimmed the spring on the pump check valve by .08=E2=80=9D. =20
=20
Shope let me borrow an accumulator spring that was 3/64=E2=80=9D longer.
=20
Up to over 450+ psi now. 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 back up to 450+.
=20
Did not change out accumulator piston/rings/sleeve or O-Rings yet, was =
hoping to avoid that.
=20
Thinking about trying a 1/16=E2=80=9D washer to shim the accumulator =
spring or is it a lost cause? =20
=20
=20
=20
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
=20
OD Pressure should be much 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 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 =
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 =
to each side of the case (ignore the passage in the workshop book that =
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 at 1,000 RPM in 4th. Drops to about 340 PSI when I attempt to =
engage the OD. OD did not engage.
This is with the back end on jack stands (not the recalled 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 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?
Based on all the reading, pressure is too low, but nothing appears way =
off?
I=E2=80=99m using the Team.Net Tech site. =
http://www.team.net/www/healey/tech/big_hly/od/delborder_od.html
=20
Next step is to check the non return valve spring.=20
Question, 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? =20
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? =
=20
>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 fatigued spring =
in the non-return valve portion of the OD (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 this spring can cause major =
frustration. 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. The 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 accumulating chamber,=20
=20
=20
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link=3D"#0563C1" vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoNormal>Shimmed the spring on the pump check valve by =
.08=E2=80=9D.=C2=A0 <o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Shope let me =
borrow an accumulator spring that was 3/64=E2=80=9D =
longer.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Up to over 450+ psi now.=C2=A0 OD will engage with the =
rear jacked up, but not while driving.=C2=A0 On jack stands, when OD is =
engaged, drops to +/- 410 psi then quickly comes back up to =
450+.<o:p></o:p></p><p class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal>Did not change out accumulator piston/rings/sleeve or =
O-Rings yet, was hoping to avoid that.<o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal>Thinking =
about trying a 1/16=E2=80=9D washer to shim the accumulator spring or is =
it a lost cause?=C2=A0 <o:p></o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><p =
class=3DMsoNormal><o:p> </o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> gradea1@charter.net =
<gradea1@charter.net> <br><b>Sent:</b> Sunday, May 24, 2020 10:26 =
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<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><p class=3DMsoNormal =
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 =
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 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 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 to each side of the case =
(ignore the passage in the workshop book that says no sealant there-just =
be careful when applying it). =
Hank<o:p></o:p></p><p>-----------------------------------------<o:p></o:p=
></p><p class=3DMsoNormal>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><br><br><o:p></o:p></p><p class=3DMsoNormal =
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'>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><o:p></o:p></p><p =
class=3DMsoNormal =
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'>This is =
with the back end on jack stands (not the recalled ones!), so it is =
under no load.</span><o:p></o:p></p><p class=3DMsoNormal =
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'>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><o:p></o:p></p><p class=3DMsoNormal =
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'>Based on =
all the reading, pressure is too low, but nothing appears way =
off?</span><o:p></o:p></p><p class=3DMsoNormal =
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'>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"=
=
target=3D"_blank">http://www.team.net/www/healey/tech/big_hly/od/delborde=
r_od.html</a></span><o:p></o:p></p><p class=3DMsoNormal =
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'> </span><o:p></o:p></p><p class=3DMsoNormal =
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'>Next step =
is to check the non return valve spring. </span><o:p></o:p></p><p =
class=3DMsoNormal =
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'> Question, 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><o:p></o:p></p><p class=3DMsoNormal =
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'>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? </span><o:p></o:p></p><p class=3DMsoNormal =
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'>From the =
team.net site :</span><o:p></o:p></p><p class=3DMsoNormal =
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'>psi, but =
for proper operation, the pressure should be at 470 to 490 =
psi.</span><o:p></o:p></p><p class=3DMsoNormal><span =
style=3D'font-size:12.0pt;font-family:"Times New Roman",serif'>Now, =
finally... the OD low oil pressure cause and fix. A <u>fatigued spring =
in the non-return valve portion of the OD</u> (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 this spring can cause major =
frustration. 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. The 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 accumulating chamber, </span><span =
style=3D'border:solid windowtext 1.0pt;padding:0in'><img border=3D0 =
width=3D374 height=3D356 style=3D'width:3.8956in;height:3.7043in' =
id=3D"Picture_x0020_5" src=3D"cid:image002.jpg@01D63200.943B2060" =
alt=3D"Image removed by sender. rework of the OD hydraulic pump =
valve"></span><o:p></o:p></p><p =
class=3DMsoNormal> <o:p></o:p></p><p =
class=3DMsoNormal> <o:p></o:p></p></div></body></html>
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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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