Thanks Peter,
Absolutely right. I think I found the reason for the "clanging", the thrust
plate pieces were being chewed to pieces by the ring gear. The trust
plate/operating disc is in many pieces, only about 1/3 of it remains as
shrapnel bits. I didn't realize it was missing although I did wonder how the
four clutch fingers would operate against the throw-out ball bearing. And we
have four springs waving in the wind as well. I do have a spare operating
disc but all four finger recesses are "dented" so may not be useful. Are
replacement operating discs aluminum or steel?
Now what about questions 2,3,4 and 5?? :-)
Thanks, Bob
Bob,
The only part of a P-type clutch that is aluminium is the thrust plate which
fits onto the four operating fingers and presses against the thrust bearing.
This plate would have four brass rivets in it as these rivets hold the
lining in place. Is your thrust plate still in one piece?
Peter Green.
> Thanks for all the earlier advice on removing the PA gearbox from inside
> the
> car. No problem getting the box out. It is now on the floor. You may
> remember, last year, I asked for some help as I thought I had a loose
> flywheel, there was a lot of clanging in the flywheel/clutch area when the
> starter was operated. Now that the box is out I found 5 pieces of
> aluminum
> shrapnel, about 1/8" thick, approx 1/2" x 3/4" in size. One piece has a
> brass rivet in it. There are markings on the ring gear where it has been
> rubbing on something and I suspect the shrapnel was in the bottom of the
> bell housing and being hit by the ring gear. Now to today's five questions
> before I go further:
>
> 1-any idea where this aluminum shrapnel originated? nothing obvious so
> far.
>
> 2-the gearbox needs a rebuild as it was noisy and the rear bearing allows
> the output shaft to wiggle and move in and out 1/8". I have read the
> gearbox
> sections in the PA/PB Instruction Manual, Malcolm Green's book, M.G. Road
> Cars, vol.1. Four Cylinder cars, and G. Howell's book A Practical Guide to
> The Restoration of the "J" type. All seem to have a different take on how
> to
> strip the PA gearbox. I'm confused. So now the question is, who do I
> listen
> to or how do I strip the box? I have rebuilt MGA boxes, TD/TF boxes, TC
> boxes and one TA box, never a MMM box.
>
> 3-where is the best place to get PA gearbox parts, assuming they are
> available.
>
> 4-anybody have a spare PA or preferably PB gearbox? I do have a spare PA
> bell housing.
>
> 5-Oh horrors, as a last resort, anybody fitted a different gearbox, maybe
> 5
> speed overdrive? I already have a spare bell housing so might not be too
> difficult.
>
> Thanks for any and all help, PA-0531 NEEDs it.
> Bob
> Bob Grunau
> 150 Pinewood Trail,
> Mississauga, Ontario,
> Canada, L5G-2L1
> 905-274-4136
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