<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0in;
margin-right:0in;
margin-bottom:0in;
margin-left:.5in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:"Courier New";}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:621155477;
mso-list-type:hybrid;
mso-list-template-ids:-1241379422 -1 67698713 67698715 67698703 67698713 67698715 67698703 67698713 67698715;}
@list l0:level1
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-.25in;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0in;}
ul
{margin-bottom:0in;}
--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>The OD started acting up in June 2019. It became very slow to engage and would not engage or stay engaged when hot. I consulted with the list and you good folks came through with specific solutions and </p><p class=MsoNormal> suggested remedies.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I still drove the car without OD the remainder of the season. We have some excellent lower speed back roads(nothing over 40- 50mph) in my area so I was able to regularly keep running and enjoy. Really missed the OD for that occasional high speed jaunt on the local free way!</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Suggestions from accumulator O rings to simple cleaning and readjustments or complete overhaul were made. There is close to 200,000 untouched miles on OD \tran.</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>This past April I replaced tranny mounts and stabilizer bushings since everything had to be raised to access and expose accumulator workings. A recommendation to go uprated with these was suggested and I did. AH Spares provided Accum. housing, piston with rubber O ring(<b>instead of metal</b>), and new spring. </p><p class=MsoNormal> </p><p class=MsoNormal><a href="https://www.ahperformanceparts.co.uk/austin-healey/performance-parts/Gearbox-Overdrive/O-RING-CONVERSION-accumulator-piston.aspx">https://www.ahperformanceparts.co.uk/austin-healey/performance-parts/Gearbox-Overdrive/O-RING-CONVERSION-accumulator-piston.aspx</a><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b>Photos of my OD Housing and Piston </b><img border=0 width=648 height=486 style='width:6.75in;height:5.0625in' id="Picture_x0020_7" src="cid:image006.jpg@01D663E5.4EB84C90"><img border=0 width=648 height=486 style='width:6.75in;height:5.0625in' id="Picture_x0020_8" src="cid:image007.jpg@01D663E5.4EB84C90"><b><i>Looked like this might be the problem?</i></b><b><o:p></o:p></b></p><p class=MsoNormal><b><span style='font-size:14.0pt'>Scenario:<o:p></o:p></span></b></p><ol style='margin-top:0in' start=1 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Spent winter reading ,researching, watching videos , looking for some local Healey knowledgeable persons\shop within decent radius to do the job. Still looking. </li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Feb. 2020 decided to have a look and took out interior. At least I could replace those tranny mounts and stabilizer bushings that needed replaced. I already had the parts for years.</li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Had that old tattered tunnel carpet duplicated by a local shop.</li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>April 2020. Used design from Dave Porter\John Sims site( <a href="http://www.healey6.com/technical.htm"><span style='color:windowtext;text-decoration:none'>http://www.healey6.com/technical.htm</span></a>) to make a extracting tool. Could not do the compressed air thing. Tool worked pretty well. It needed to be a little longer since I was doing this in situ but I managed to pull everything out with a little improvisation and luck. Lots of sludge to clean out. Operating valve, pump valve, accumulator cavern etc. Used much CRC BrakeKleen!</li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>May 2020. Replaced w\new accumulator housing, piston, spring, gasket. Old spring was about ¼” shorter than new spring.</li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>June 2020. Did usual Spring maint.to get road worthy. OD still would not engage. Needed a OD pressure test. <a href="http://www.geocities.ws/jholekamp/">http://www.geocities.ws/jholekamp/</a>. Either I was not setting lever to it’s 1/32” requirement or pressure problem. Or other? <b>UH OH!?</b></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>July 2020. Pressure tested steady rock solid 500+ psi.(Sounds of silent prayers and shouts of joy here!) So I fiddled more with the lever adjustment and decided to <u>hold the solenoid arm DOWN instead of UP</u> while tightening. <b>UH HUH!</b></li></ol><p class=MsoNormal style='margin-left:.25in'> Can’t remember last when I felt such a crisp clean OD engagement!! Impressive also since ambient temps have been in the 90’s. Maintains engine temps @190-200 w\pusher fan. Normally 185-190. </p><ol style='margin-top:0in' start=8 type=1><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'> 7/15/20 –Took a nice long high speed celebratory run on I 680. I am still intoxicated with the Healey sound. OD performed like new! Leaks with Redline MT 90, but I don’t care. Fingers always crossed because every drive is a test drive. Working well to date 7/27/20.</li></ol><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph>Parts: Solenoid, Interrupter switch, Acc. Housing, piston, spring, gasket, pressure tester, tool. <o:p></o:p></p><p class=MsoListParagraph> Total Parts=$348.83<o:p></o:p></p><p class=MsoListParagraph> Labor=Have no clue what a shop would charge?<o:p></o:p></p><p class=MsoListParagraph> Comment=Don’t want to do a job like this again. I am mostly a simple maintenance guy.<o:p></o:p></p><p class=MsoListParagraph> Wife is very relieved. Mental health with a Healey can be problematic.<o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph>Appreciate all those who contribute so much so often through the “List” and “Forums”.<o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph>Let the 53 year rolling restoration continue.* <o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph>WD <o:p></o:p></p><p class=MsoListParagraph>67 BJ8 <o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><img border=0 width=468 height=1 style='width:4.875in;height:.0069in' id="Rectangle_x0020_3" src="cid:image008.png@01D663E5.4EB84C90"><o:p></o:p></p><pre><span style='color:black'>The accumulator in the overdrives installed in Austin Healeys have a reduced 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. These 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 developed.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>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 thus forcing the sleeve out so the o-rings can be replaced.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Bill Lawrence<o:p></o:p></span></pre><pre><span style='color:black'>BN1 #554<o:p></o:p></span></pre><pre><span style='color:black'>________________________________<o:p></o:p></span></pre><pre><span style='color:black'>From: Healeys <<a href="http://autox.team.net/mailman/listinfo/healeys">healeys-bounces at autox.team.net</a>> on behalf of Bob Spidell <<a href="http://autox.team.net/mailman/listinfo/healeys">bspidell at comcast.net</a>><o:p></o:p></span></pre><pre><span style='color:black'>Sent: Saturday, June 29, 2019 3:40 PM<o:p></o:p></span></pre><pre><span style='color:black'>To: <a href="http://autox.team.net/mailman/listinfo/healeys">healeys at autox.team.net</a><o:p></o:p></span></pre><pre><span style='color:black'>Subject: Re: [Healeys] OD Good news Bad news<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Either the pump, actuating pistons or the accumulator. My guess would be the 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 rubber O-rings that wear so may not provide enough pressure to override the heavy 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 done it. Or some combination of the three. If you end up replacing the accumulator I recommend the DWM 'uprated' one if you like crisp activation.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Check: 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 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 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.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>I'm not surprised it disengages quickly; all the hydraulics are there to override 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 entirely necessary unless the OD was slipping when engaged; I think it's a 'might as well while it's on the bench' thing).<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Bob<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>ps. My stock accumulator still worked normally, and I kept it; if you want it I'll let it go for shipping cost.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>On 6/29/2019 7:20 AM, Warren wrote:<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Recently had the OD quit working. First time in 52 yrs. Luck? Removed tunnel and checked electrics and switches and solenoid 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.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>Now I got it to go into OD. Every time. The good news. But it takes a loooong time. Many seconds. Just flip the switch at speed and “eventually” it slowly slides into OD. Not crisp and instant like before. The bad news. It disengages normally as before. Flip, depress clutch slightly, blip accelerator.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>I’ve researched the archives as much as possible on all the forums but am hesitant to proceed without forum\list wisdom.<o:p></o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'><o:p> </o:p></span></pre><pre><span style='color:black'>WD 67 BJ8<o:p></o:p></span></pre><p class=MsoNormal><o:p> </o:p></p></div></body></html>