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Tach disassembly question - 1956 10EE square dial

bll230

Hot Rolled
Joined
Jun 14, 2007
Location
Las Vegas
While my lathe is running there is a very slight rubbing noise coming from the tach. Does anyone have any suggestions on disassembling the tach?

I read Focus's thread,

https://www.practicalmachinist.com/...ore-after-367346/?highlight=tachometer+repair

and his parts picture is very detailed and his work is excellent, but his round dial tach is different from mine.

I have the tach that only registers forward, nothing in reverse.

IMG_0913 copy.jpg
 
His is only forward to round dials and square dials are the same except the input shaft is different on the square dials and is interchangeable.
 
I think I sent mine to Palo Alto Speedo repair. I believe they were made by Stewart-Warner, and the guts were dirt common and indestructible.
 








 
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