I was able to test my A-type connected to the transmission with a 1/2 inch
drill chucked on the nose of the transmission input shaft. I got 340 PSI at
about 2500 RPM drill speed and the transmission in 4th gear. I have a
Milwaukee 2-speed 1/2 inch drill. So I'd guess 400 RPM is not enough.
Tim
-----Original Message-----
From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Glenn Franco
Sent: Sunday, June 22, 2014 5:07 PM
To: Friends of triumph; 6pack@autox.team.net
Subject: Re: [Fot] A-Type O/D Testing
Let me try this again since the site has been down.
On 6/19/2014 5:02 PM, Glenn Franco wrote:
> Group
> I'm trying to bench test an A type that I overhauled this past winter
> from a box of parts.
> I also have an A type that I took out of a 71 TR6 that I would like to
> test before using them in any cars.
>
> 1st dumb question
> What do you think the minimum input shaft speed needs to be to allow
> the O/D to engage.
>
> I fabricated an adapter from a clutch hub and various pieces of steel
> on a lathe to drive the trans from the input shaft.
>
> I'm spinning the adapter with a large 1/2 inch drill but the max drill
> speed is only a little over 500 RPM which is probably not enough.
>
> I get oil flow up the operating valve when the plug is removed but no
> engagement. This is the result of spinning both transmissions.
>
> Any suggestions/more RPM's
> Thanks Glenn
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