[Fot] A-Type Over Drive Question Again

[Tim Hutchisen]

Hi Glenn,

Having built numerous OD units, I have run into a couple of instances where the cone clutch needed to "bed in". If you installed a new cone clutch, the angle of the linings may not be an exact match to the brake ring and annulus and it will stick when applied. A good swift rap (or two or three) on the exterior of the brake ring with a dead blow hammer will release the clutch. Had this happen with Henry Frye's race car at Summit Point a few years ago. Driving around the paddock with the gearbox cover off and excersising the OD, releasing it with the dead blow hammer. It eventually worked it's way in with time. 

Tim Hutchisen

Penn Ridge Motors

Norway, ME

 

From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Glenn Franco via Fot
Sent: Thursday, December 26, 2019 5:04 PM
To: FOT list <fot at autox.team.net>
Subject: [Fot] A-Type Over Drive Question Again

 

Happy New Year

Quick Question

I have rebuilt numerous A-types over the last few years, but I have one that's been giving us fits.

Transmission was a TR6 and the mainshaft was replaced with the proper overdrive shaft for the A-type.

The A-type appears to be an early one with steel piston rings on the apply pistons. 

The pump was replaced and puts out +300 psi during testing.

The overdrive and trans was tested by back spinning from the tailshaft flange with an electric motor.

The overdrive appears to be engaged and it appears that the pressure will not drop.

The pressure relief at the pump was removed and the accumulator was loosened to relieve the pressure.

Now trans in neutral the output shaft of the overdrive appears to be locked up and will not spin.

Any ideas??

Thanks in advance

Glenn

 

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