[Healeys] Overdrive disengages

Mon Jul 3 10:05:48 MDT 2023

Hi John-hope this helps-not an easy book to copy from (Roger Moment's
book has a spiral binding which lays flat) In any event, here is the
procedure to adjust the switch which as it says; once set its good
unless you muck with the carbs.
I hope everyone agrees with this procedure-no one seems to criticize
Haynes Manuals. I could not locate this diagram in the 100 workshop
book, but I have seen it; probably in the 100-6/3000 manual. Regards,
Hank

	-----------------------------------------From: "John Spaur" 
To: "Hank Leach"
Cc: "Bob Spidell"
Sent: Sunday July 2 2023 7:12:15PM
Subject: RE: [Healeys] Overdrive disengages

	Hank, I have the workshop manuals but the Haynes guide may have
something I am missing so please send it. 

	I will try resetting the static setting, fine setting it and then the
throttle switch 

	Thanks! 

	John 

	FROM: Hank Leach [mailto:gradea1 at charter.net]
SENT: Sunday, July 2, 2023 6:49 PM
TO: 'John Spaur' 
CC: 'Bob Spidell' ; 'healeys at autox.team.net' 
SUBJECT: RE: [Healeys] Overdrive disengages   

	John- it is a .040 feeler gauge that goes under the throttle stop-
That is equivalent to about 1/5 throttle opening. That is to set the
throttle switch.   

	The 3/16 drill bit is used to "static set" the position of the
solenoid lever. I agree, that position is not alway ideal. Fine
adjustment is made at the arm of the solenoid in which you get it to
the maximum lift and then when it drops it clears the base about 1/32"
at the same time gently pushing it in toward the casing to make sure
it does not bind. Solenoid plunger must drop freely. I can send you
that page from Haynes manual if it helps you to set the throttle
switch. Hank 

	----------------------------------------- 

	From: "John Spaur"
 To: "Hank Leach", "Bob Spidell"
 Cc: healeys at autoxteam.net
 Sent: Sunday July 2 2023 6:01:07PM
 Subject: RE: [Healeys] Overdrive disengages  

	I think I understand now. 

	I need to loosen the arm on the throttle switch, put a 3/16 spacer
under the throttle stop and adjust the throttle switch so the test
light goes out and then tighten everything up. 

	Correct? 

	-john 

	 FROM: Healeys [mailto:healeys-bounces at autox.team.net] ON BEHALF OF
Hank Leach via Healeys
SENT: Sunday, July 2, 2023 10:24 AM
TO: 'Bob Spidell' 
CC: healeys at autox.team.net
SUBJECT: Re: [Healeys] Overdrive disengages   

	Bob's got the procedure. Use a .040" feeler gauge (or 3/16 drill)
under the throttle stop (1/5 of the throttle opening). Connect a 12V
test light to the fuse box and the top terminal on the throttle
switch. (Good example in Haynes Manual page 124). Light should go out
at this adjustment. Solenoid adjustment should be as Bob describes and
work smoothly-no binding. Hank 

	----------------------------------------- 

	From: "Bob Spidell"
 To: healeys at autox.team.net
 Cc:
 Sent: Sunday July 2 2023 9:20:10AM
 Subject: Re: [Healeys] Overdrive disengages

 Hi John,

 What keeps the O/D from disengaging immediately when you open the
dash switch is the 'throttle switch.' When the O/D is actuated there
is a parallel circuit that will keep the O/D activated until you press
the accelerator pedal, theoretically preventing reverse thrust from
damaging the O/D. The parallel circuit runs through the throttle
switch on the scuttle (firewall); it sounds like you need to adjust
it. It's a simple adjustment using a certain diameter--I don't recall
it offhand, but I'll look it up if you need it--drill bit under the
throttle stop levers. There's a small shaft off the throttle mechanism
that opens this switch--it's just a set of points and a cam
inside--with a lever with a pinch clamp. Just loosen the pinch clamp,
set the bit under the throttle stop plate and tighten the clamp.

 If you O/D is actuating consistently within a couple seconds or so
then your solenoid, operating lever, operating shaft and ball 'valve'
are correct. The
'stick-a-drill-bit-through-the-lever-into-the-housing' method is
notoriously unreliable; the proper setting is best achieved by
measuring the lift--IIRC, it's 1/32" but not sure--of the operating
shaft at the top of the O/D hydraulic section.

 Bob  

	On 7/1/2023 11:55 AM, John Spaur via Healeys wrote:    

	Hi All, 

	My overdrive is functioning again after replacing the accumulator
housing and piston but it is exhibiting an odd behavior which I
believe is related to the adjustment of the setting lever. 

	When I open the toggle switch, the OD will sometimes disengage
immediately instead of waiting until I blip the accelerator. When I
adjusted the setting lever, I could not use a 3/16” dowel to line up
the lever with the hole in the housing I had to advance the lever
clockwise a bit to get the OD to engage when the toggle switch was
closed. This has always been the case and this issue is mentioned in
some articles. 

	Do I need to fiddle with the setting lever adjustment some more? If
so, do I rotate it clockwise or counter clockwise? 

	Any other thoughts? 

	TIA, 

	John Spaur 

	’62 BT7  

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