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TR3A oil pump drive shaft

To: triumphs@autox.team.net
Subject: TR3A oil pump drive shaft
Date: Sun, 13 Jun 2004 08:23:17 EDT
As posted before, I've been experiancing low oil pressure (10-20 psi at idle) 
after engine warming, (30-40 psi (at speed ~3K rpm), 70 psi (at cold). This 
is independent of oil type and of cleaning the oil relief valve. 

I am now hearing a rattle/fluttering type noise which I beleive may be 
attributable to the oil pump drive shaft (?key/bushing/shaft?). It is not 
evident at 
all engine speeds. I would not say that it is loud, but I hear it. 

Otherwise the engine is strong and running well. Typically driving regularly 
100+ miles per day at highway speeds.

Williams book ("How to Restore ...") seems to descibe this shaft flutter 
phenomena well (page 90), however does not provide a procedure for repair, nor 
do 
the Haynes or Bently manuals. 

The questions ... 
(1) Does replacing/repairing the shaft, etc require removal of the oil pump  
assembly (dropping the sump), or can the work be done from the top through the 
dizzie. The shaft in question apparently drives both via the camshaft. Any 
recommendation form those who've been there.
(2) Is the Moss replacement shaft of good quality. Is there another supplier. 
VB does not list it. Haven't called TRF.
(3) Do my assumptions (as to the source of the rattle/flutter) appear to be 
correct?

Thanks & Best Regards,
Ed (58 TR3A)





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