[TR] [6pack] speedo failure

[Rick]

Oliver,

 

I had two recent failures of Moss tach cables for my TR3A. The problem was
not the length, but the width of the square end that mates to the dizzy. The
spec is 0.125" nominal on a side, and both cables were 0.010" oversized and
would not fully insert. Screwing the retaining cap in home placed the entire
cable in compression, and took out the tach (after a lot of screeching).
After rebuilding the tach, I figured out the problem and ground the
offending 10 thou off; the cable then inserted fully into the dizzy, the
cable operated freely, and the tach now works very well. The tach end, BTW,
has a female part that is a bit oversized, and was not bothered by the
oversized end.

 

 


Rick in Seattle

1960 TR3A

1970 BSA 441 Victor Special

1975 Norton 850 Commando Mk3