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My OD is driving me mad and I definitely need some inspired advice. A =
bit
of background first. I=A1=AFll try to lay out all the facts in a logical
sequence. (I=A1=AFm increasingly reluctant to link ODs with logic!)
1. I=A1=AFd say that the OD has done +/- 15k miles since a total rebuild
by Overdrive Spares here in UK.
2. The OD had issues before Christmas (21) and was sorted out by OD
Spares. The accumulator was uprated and pressure issues sorted.
3. OD functioned 100% on the few times I=A1=AFd been able to take it out
since then until..
4. One day, the OD stopped functioning.
5. I checked the electrics. All fine there so I delved a bit deeper.
6. It had fried its solenoid which I replaced. But=A1=A6
7. That did not fix the problem so=A1=A6
8. I decided that the operating valve=A1=AFs adjustment might be off =
so..
9. I bought a dial gauge and hoped to sort it out precisely rather
than by =A1=B0feel=A1=B1, which I lack in this area.
10. Prior to using the gauge I decided to see if the OD was functioning
at all so I raised the car on stands and fitted my pressure gauge.
11. I get a reading of 500psi rising a bit when I rev the engine but
I=A1=AFd suppose that would drop when the oil warms up.
12. BUT, and this is where things go pear-shaped=A1=A6moving the little
lever on the RHS up and down does not engage/disengage OD. There is no
change on the gauge to show OD engaging or disengaging.
13. AND, the gauge stays at 500psi even when the engine is off. Moving
the lever 20 times has zero effect. Stayed at 500 overnight!
14. Of course, I checked for dirt in the operating valve area. None.
15. Likewise, the tiny hole in the =A1=B0valve - operating=A1=B1 (the =
spindle
thing which the ball sits on)=A1=A6.that=A1=AFs clear. And surely, the =
pressure
would diminish overnight if something in that area was partially =
obstructed?
16. When I remove the pressure valve, there=A1=AFs a small spillage - no
more than you=A1=AFd expect - but repeating the pressure gauge process =
only
returns the same results.
17. I see in the bible according to Norman Nock that =A1=B0Holding this
lever with your thumb and index finger, you should be able to push the
lever down lightly about =A8=FC=A1=B1 until you feel a slight spring =
pressure
resistance. The lever should go down another =A8=F9=A1=B1 after =
encountering the
resistance=A1=A6=A1=A6=A1=B1 ie there=A1=AFs about =A8=FD=A1=B1 movement =
up & down in that lever.
Well, my lever does move and does lift the ball, but there=A1=AFs not =
=A8=FD=A1=B1
movement there. Could that be the problem area???
18. Almost finished=A1=A6keep reading!
So, I=A1=AFm stumped. Every time I learn something new about the OD, it =
has a
new trick to baffle me.
I=A1=AFve no 100% sure way of telling whether it=A1=AFs gone into OD =
and stuck
there or whether it=A1=AFs simply not going into OD at all.
I=A1=AFve done a lot of reading through my books and collection of =
advice from
the various gurus and found reference to ODs being stuck but those =
seemed
to be to do with =A1=B0weak springs=A1=B1 which, particularly after a =
long lay-off,
wouldn=A1=AFt disengage. The cure for this being a good smack on the =
steel
plate sandwiched in the OD from below. Well, that seems to be a stuck
mechanism issue whereas I=A1=AFm facing a hydraulic conundrum. Or am I?
There is what is usually referred to as the =A1=B0pressure relief =
valve=A1=B1
adjacent to the accumulator. The name suggested that pressure might be
stuck in that area=A1=A6.but surely not overnight?
=20
Any ideas? I am particularly reluctant to take the gearbox and OD out.
You=A1=AFll recall the ridiculous business of the defective clutch kit? =
Well, I
forget whether we had the box in and out 3 times or 4. I=A1=AFd hoped =
not to do
it again so soon or ever for that matter.
=20
I=A1=AFm hoping for a miracle of course but some sound advice would be a
godsend=A1=A6=A1=A6=A1=A6=A1=A6
=20
Thanks,
Simon
=20
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link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal>My OD is driving me mad and I definitely need some =
inspired advice. A bit of background first. I=A1=AFll try to lay out all =
the facts in a logical sequence. (I=A1=AFm increasingly reluctant to =
link ODs with logic!)<o:p></o:p></p><ol style=3D'margin-top:0cm' =
start=3D1 type=3D1><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>I=A1=AFd say that the =
OD has done +/- 15k miles since a total rebuild by Overdrive Spares here =
in UK.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>The OD had issues =
before Christmas (21) and was sorted out by OD Spares. The accumulator =
was uprated and pressure issues sorted.<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>OD functioned 100% on the few times I=A1=AFd been able to take it =
out since then until..<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>One day, the OD =
stopped functioning.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>I checked the =
electrics. All fine there so I delved a bit deeper.<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>It had fried its solenoid which I replaced. =
But=A1=A6<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>That did not fix the =
problem so=A1=A6<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>I decided that the =
operating valve=A1=AFs adjustment might be off so..<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>I bought a dial gauge and hoped to sort it out precisely rather =
than by =A1=B0feel=A1=B1, which I lack in this area.<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>Prior to using the gauge I decided to see if the OD was =
functioning at all so I raised the car on stands and fitted my pressure =
gauge.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>I get a reading of =
500psi rising a bit when I rev the engine but I=A1=AFd suppose that =
would drop when the oil warms up.<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>BUT, and this is where things go pear-shaped=A1=A6moving the =
little lever on the RHS up and down does not engage/disengage OD. There =
is no change on the gauge to show OD engaging or =
disengaging.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>AND, the gauge stays =
at 500psi even when the engine is off. Moving the lever 20 times has =
zero effect. Stayed at 500 overnight!<o:p></o:p></li><li =
class=3DMsoListParagraph style=3D'margin-left:0cm;mso-list:l0 level1 =
lfo1'>Of course, I checked for dirt in the operating valve area. =
None.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>Likewise, the tiny =
hole in the =A1=B0valve – operating=A1=B1 (the spindle thing which =
the ball sits on)=A1=A6.that=A1=AFs clear. And surely, the pressure =
would diminish overnight if something in that area was partially =
obstructed?<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>When I remove the =
pressure valve, there=A1=AFs a small spillage – no more than =
you=A1=AFd expect – but repeating the pressure gauge process only =
returns the same results.<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>I see in the bible =
according to Norman Nock that =A1=B0Holding this lever with your thumb =
and index finger, you should be able to push the lever down lightly =
about =A8=FC=A1=B1 until you feel a slight spring pressure resistance. =
The lever should go down another =A8=F9=A1=B1 after encountering the =
resistance=A1=A6=A1=A6=A1=B1 ie there=A1=AFs about =A8=FD=A1=B1 movement =
up & down in that lever. Well, my lever does move and does lift the =
ball, but there=A1=AFs not =A8=FD=A1=B1 movement there. Could that be =
the problem area???<o:p></o:p></li><li class=3DMsoListParagraph =
style=3D'margin-left:0cm;mso-list:l0 level1 lfo1'>Almost =
finished=A1=A6keep reading!<o:p></o:p></li></ol><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>So, I=A1=AFm stumped. Every time I learn =
something new about the OD, it has a new trick to baffle =
me.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>I=A1=AFve no 100% sure way of telling =
whether it=A1=AFs gone into OD and stuck there or whether =
it=A1=AFs simply not going into OD at all.<o:p></o:p></p><p =
class=3DMsoNormal style=3D'margin-left:18.0pt'>I=A1=AFve done a lot of =
reading through my books and collection of advice from the various gurus =
and found reference to ODs being stuck but those seemed to be to do with =
=A1=B0weak springs=A1=B1 which, particularly after a long lay-off, =
wouldn=A1=AFt disengage. The cure for this being a good smack on the =
steel plate sandwiched in the OD from below. Well, that seems to be a =
stuck mechanism issue whereas I=A1=AFm facing a hydraulic conundrum. Or =
am I?<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>There is what is usually referred to as the =
=A1=B0pressure relief valve=A1=B1 adjacent to the accumulator. The name =
suggested that pressure might be stuck in that area=A1=A6.but surely not =
overnight?<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'><o:p> </o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>Any ideas? I am particularly reluctant to =
take the gearbox and OD out. You=A1=AFll recall the ridiculous business =
of the defective clutch kit? Well, I forget whether we had the box in =
and out 3 times or 4. I=A1=AFd hoped not to do it again so soon or ever =
for that matter.<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'><o:p> </o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>I=A1=AFm hoping for a miracle of course but =
some sound advice would be a =
godsend=A1=A6=A1=A6=A1=A6=A1=A6<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'><o:p> </o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>Thanks,<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'>Simon<o:p></o:p></p><p class=3DMsoNormal =
style=3D'margin-left:18.0pt'><o:p> </o:p></p></div></body></html>
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