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Bob,=20
Do you still have your stock accumulator? I'm interested in it. Thanks.=20
Regards,=20
Charlie Schott=20
----- Original Message -----
From: "WILLIAM B LAWRENCE" <ynotink@msn.com>=20
To: "Bob Spidell" <bspidell@comcast.net>, healeys@autox.team.net=20
Sent: Saturday, June 29, 2019 4:05:09 PM=20
Subject: Re: [Healeys] OD Good news Bad news=20
The accumulator in the overdrives installed in Austin Healeys have a reduce=
d bore size to moderate the force of the shift into OD. The bore sleeve or =
liner has rubber o-rings that seal the pressure in the accumulator bore. Th=
ese o-rings deteriorate with time, heat, and use and then they allow oil to=
leak past the accumulator piston thus reducing the pressure that can be de=
veloped.=20
To replace them you need to remove the side plate that holds the accumulato=
r in place, place a dowel in the piston to hold it in place and pressurize =
the OD from the actuator port valve thus forcing the sleeve out so the o-ri=
ngs can be replaced.=20
Bill Lawrence=20
BN1 #554=20
From: Healeys <healeys-bounces@autox.team.net> on behalf of Bob Spidell <bs=
pidell@comcast.net>=20
Sent: Saturday, June 29, 2019 3:40 PM=20
To: healeys@autox.team.net=20
Subject: Re: [Healeys] OD Good news Bad news=20
Either the pump, actuating pistons or the accumulator. My guess would be th=
e accumulator; mine still worked at 200K miles, but the cylinder was scored=
a little from the metal rings on the piston. The actuating pistons have ru=
bber O-rings that wear so may not provide enough pressure to override the h=
eavy springs that keep the OD a 'single shaft' when the it's not operating.=
I believe the accumulator and pump can be replaced in situ, but I've not d=
one it. Or some combination of the three. If you end up replacing the accum=
ulator I recommend the DWM 'uprated' one if you like crisp activation.=20
Check: 1) pressure at the actuating valve port (should be over 400psi at sp=
eed, but I think it'll work as low as 350--not sure), 2) that the actuating=
shaft rises the correct distance--I believe it's 1/32"--when activated. If=
you have good pressure that rules out the pump. If you got the DWM accumul=
ator, and it wasn't the problem, at least you'll have a crisper OD when aft=
er you tear into it to replace the O-rings.=20
I'm not surprised it disengages quickly; all the hydraulics are there to ov=
erride the 8 heavy springs; the springs shouldn't fail (it's recommended to=
replace them if you do a complete rebuild, though I'm not convinced it's e=
ntirely necessary unless the OD was slipping when engaged; I think it's a '=
might as well while it's on the bench' thing).=20
Bob=20
ps. My stock accumulator still worked normally, and I kept it; if you want =
it I'll let it go for shipping cost.=20
On 6/29/2019 7:20 AM, Warren wrote:=20
Recently had the OD quit working. First time in 52 yrs. Luck? Removed tunne=
l and checked electrics and switches and solenoid seemed to work. Some hesi=
tancy with solenoid at first. Replaced solenoid and interrupter switch as t=
hese were original parts and with close to 200K on the car thought it prude=
nt to do so. Tranny oil topped off regularly and drained and cleanout of sc=
reen and magnets every two years. Using Redline MT90 for many years. Before=
that used ND 30wt.=20
Now I got it to go into OD. Every time. The good news . But it takes a looo=
ong time. Many seconds. Just flip the switch at speed and =E2=80=9Ceventual=
ly=E2=80=9D it slowly slides into OD. Not crisp and instant like before. Th=
e bad news . It disengages normally as before. Flip, depress clutch slightl=
y, blip accelerator.=20
I=E2=80=99ve researched the archives as much as possible on all the forums =
but am hesitant to proceed without forum\list wisdom.=20
WD 67 BJ8=20
_______________________________________________=20
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e=20
Healeys@autox.team.net=20
http://autox.team.net/mailman/listinfo/healeys=20
nology.net=20
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<html><body><div style=3D"font-family: times new roman, new york, times, se=
rif; font-size: 12pt; color: #000000"><div>Bob,</div><div><br></div><div>Do=
you still have your stock accumulator? I'm interested in it. Thanks.</div>=
<div><br></div><div>Regards,</div><div><br></div><div>Charlie Schott</div><=
div><br></div><hr id=3D"zwchr"><div style=3D"color:#000;font-weight:normal;=
font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-ser=
if;font-size:12pt;" data-mce-style=3D"color: #000; font-weight: normal; fon=
t-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-s=
erif; font-size: 12pt;"><b>From: </b>"WILLIAM B LAWRENCE" <ynotink@msn.c=
om><br><b>To: </b>"Bob Spidell" <bspidell@comcast.net>, healeys@au=
tox.team.net<br><b>Sent: </b>Saturday, June 29, 2019 4:05:09 PM<br><b>Subje=
ct: </b>Re: [Healeys] OD Good news Bad news<br><div><br></div><style style=
=3D"display:none;" data-mce-style=3D"display: none;"> P {margin-top:0;margi=
n-bottom:0;} </style><div style=3D"font-family: Calibri, Helvetica, sans-se=
rif; font-size: 12pt; color: rgb(0, 0, 0);" data-mce-style=3D"font-family: =
Calibri, Helvetica, sans-serif; font-size: 12pt; color: #000000;">The accum=
ulator in the overdrives installed in Austin Healeys have a reduced bore si=
ze to moderate the force of the shift into OD. The bore sleeve or liner has=
rubber o-rings that seal the pressure in the accumulator bore. These o-rin=
gs deteriorate with time, heat, and use and then they allow oil to leak pas=
t the accumulator piston thus reducing the pressure that can be developed.&=
nbsp;</div><div style=3D"font-family: Calibri, Helvetica, sans-serif; font-=
size: 12pt; color: rgb(0, 0, 0);" data-mce-style=3D"font-family: Calibri, H=
elvetica, sans-serif; font-size: 12pt; color: #000000;"><br></div><div styl=
e=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: r=
gb(0, 0, 0);" data-mce-style=3D"font-family: Calibri, Helvetica, sans-serif=
; font-size: 12pt; color: #000000;">To replace them you need to remove the =
side plate that holds the accumulator in place, place a dowel in the piston=
to hold it in place and pressurize the OD from the actuator port valve thu=
s forcing the sleeve out so the o-rings can be replaced.</div><div style=3D=
"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0=
, 0, 0);" data-mce-style=3D"font-family: Calibri, Helvetica, sans-serif; fo=
nt-size: 12pt; color: #000000;"><br></div><div style=3D"font-family: Calibr=
i, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" data-mce-s=
tyle=3D"font-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color=
: #000000;">Bill Lawrence</div><div style=3D"font-family: Calibri, Helvetic=
a, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);" data-mce-style=3D"fon=
t-family: Calibri, Helvetica, sans-serif; font-size: 12pt; color: #000000;"=
>BN1 #554 </div><div id=3D"appendonsend"><br></div><hr style=3D"displa=
y:inline-block;width:98%" data-mce-style=3D"display: inline-block; width: 9=
8%;"><div id=3D"divRplyFwdMsg" dir=3D"ltr"><span face=3D"Calibri, sans-seri=
f" data-mce-style=3D"font-size: 11pt; color: #000000; font-family: Calibri,=
sans-serif;" style=3D"font-size: 11pt; color: #000000; font-family: Calibr=
i, sans-serif;" color=3D"#000000"><b>From:</b> Healeys <healeys-bounces@=
autox.team.net> on behalf of Bob Spidell <bspidell@comcast.net><br=
> <b>Sent:</b> Saturday, June 29, 2019 3:40 PM<br> <b>To:</b> healeys@autox=
.team.net<br> <b>Subject:</b> Re: [Healeys] OD Good news Bad news</span><di=
v> </div></div><div style=3D"background-color:#FFFFFF" data-mce-style=
=3D"background-color: #ffffff;"><p>Either the pump, actuating pistons or th=
e accumulator. My guess would be the accumulator; mine still worked a=
t 200K miles, but the cylinder was scored a little from the metal rings on =
the piston. The actuating pistons have rubber O-rings that wear so ma=
y not provide enough pressure to override the heavy springs that keep the O=
D a 'single shaft' when the it's not operating. I believe the accumul=
ator and pump can be replaced in situ, but I've not done it. Or some =
combination of the three. If you end up replacing the accumulator I r=
ecommend the DWM 'uprated' one if you like crisp activation.<br></p><p>Chec=
k: 1) pressure at the actuating valve port (should be over 400psi at speed,=
but I think it'll work as low as 350--not sure), 2) that the actuating sha=
ft rises the correct distance--I believe it's 1/32"--when activated. =
If you have good pressure that rules out the pump. If you got the DWM=
accumulator, and it wasn't the problem, at least you'll have a crisper OD =
when after you tear into it to replace the O-rings.</p><p>I'm not surprised=
it disengages quickly; all the hydraulics are there to override the 8 heav=
y springs; the springs shouldn't fail (it's recommended to replace them if =
you do a complete rebuild, though I'm not convinced it's entirely necessary=
unless the OD was slipping when engaged; I think it's a 'might as well whi=
le it's on the bench' thing).<br></p><p>Bob</p><p>ps. My stock accumu=
lator still worked normally, and I kept it; if you want it I'll let it go f=
or shipping cost.</p><p><br></p><div class=3D"x_moz-cite-prefix">On 6/29/20=
19 7:20 AM, Warren wrote:<br></div><blockquote><div class=3D"x_WordSection1=
"><p class=3D"x_MsoNormal">Recently had the OD quit working. First time in =
52 yrs. Luck? Removed tunnel and checked electrics and switches and solenoi=
d seemed to work. Some hesitancy with solenoid at first. Replaced solenoid =
and interrupter switch as these were original parts and with close to 200K =
on the car thought it prudent to do so. Tranny oil topped off regularly and=
drained and cleanout of screen and magnets every two years. Using Redline =
MT90 for many years. Before that used ND 30wt.</p><p class=3D"x_MsoNormal">=
</p><p class=3D"x_MsoNormal">Now I got it to go into OD. Every time. =
<b><span data-mce-style=3D"text-decoration: underline;" style=3D"text-decor=
ation: underline;">The good news</span></b><span data-mce-style=3D"text-dec=
oration: underline;" style=3D"text-decoration: underline;">.</span> But it =
takes a loooong time. Many seconds. Just flip the switch at speed and =E2=
=80=9Ceventually=E2=80=9D it slowly slides into OD. Not crisp and instant l=
ike before.<b> <span data-mce-style=3D"text-decoration: underline;" style=
=3D"text-decoration: underline;">The bad news</span></b>. It disengages nor=
mally as before. Flip, depress clutch slightly, blip accelerator.</p><p cla=
ss=3D"x_MsoNormal"> </p><p class=3D"x_MsoNormal">I=E2=80=99ve research=
ed the archives as much as possible on all the forums but am hesitant to pr=
oceed without forum\list wisdom.</p><p class=3D"x_MsoNormal"> </p><p c=
lass=3D"x_MsoNormal">WD 67 BJ8</p><p class=3D"x_Mso=
Normal"> </p><p class=3D"x_MsoNormal"> </p><br></div><pre class=
=3D"x_moz-quote-pre"></pre></blockquote></div><br>_________________________=
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