[Healeys] o/d not engaging

[john harper]

Hank

On the open type of mechanism the bottom rubber stop often rots away in oil
and allows the solenoid armature to drop too low for the heavy current
solenoid coil to lift it up to the point where the heavy coil is no longer
connected.

There are situations where the armature will not lift until the car goes
over a bump. This is sometimes the reason why overdrives can come in
erratically.

One can replace the bottom rubber stop but a more reliable cure is to tap
and thread in a small bolt in its place and then adjust it in the same way
as it is explained in the enclosed version.

Best regards

On Sun, 11 Jul 2021 at 18:23, Henry G Leach via Healeys <
healeys at autox.team.net> wrote:

> First thing I would do is swap out the "new" solenoid for another, to see
> if the unit works properly.  It sounds like this one is wimpy.
>
> When you say gasket replacement, I'm assuming that you mean the gasket
> between the side cover and the body.  The solenoid has no gasket and adding
> one would create a problem. The side cover gasket is not very thick, so
> use sealant to prevent any leaks. (also replace o-ring).  Other than that,
> there is no reason that the gasket replacement would affect the operation,
> providing the accumulator parts are assembled correctly, and are in good
> working order.
>
> Four hundred pounds of pressure is needed to overcome the 8 springs which
> keep the unit in direct drive. Any less will not shift properly.
>
> Now carefully read and adjust the solenoid position as described in the
> manual. When adjusted, the lever only moves about 1/16" to engage OD.
> Regards, Hank
>
> -----------------------------------------
> From: "healeymanjim"
> To: "healeys at autox.team.net"
> Cc:
> Sent: Saturday July 10 2021 7:53:21PM
> Subject: [Healeys] o/d
>
> for a few months i have been struggling with an overdrive that fails to
> engage with the solenoid (new one) but will engage if
> i push on the right side setting lever. made many different adjustments
> and none worked. solenoid will instantly lift the
> left side adjusting arm as long as there is no oil pressure. it will not
> lift the adjustment arm more than a few millimeters
> when car is moving. we had removed the solenoid bracket and replaced a
> gasket. not sure what could have happened but
> trans and o/d are now separated on my workbench and i can see nothing
> wrong anywhere. checked and reseated ball on
> oil pump and found no grit or dirt. small accumulator piston moves up and
> down inside housing assembly. there were no
> problems with overdrive until gasket change. any help appreciated.
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