tachometer

Anonymous-0 · Sep 21, 2012

Looking for the right kind of Tach to check the RPM on my Farmall Super M. Any recommendations?

Hayfarmer · Sep 21, 2012

is it 6 or 12 volt? If 12 a regular automotive tach will work, problem is the scale is so high it is hard to read with RPMs on tractor. I ordered a low reading Tach through the local NAP dealer that only ges to 4000 works well on my SMTA but it is 12 volt.

Janicholson · Sep 21, 2012

Three kinds, A distributor tool called a tach Dwell Meter. A commercial 4 cylinder (gauge for a dash) tach for 6 volt systems. or a strobe tach that flashes a light on the front pulley and is adjusted untill it appears to stop in the flashes, and reads out the RPM. Jim

D Slater · Sep 21, 2012

If setting to IH specs I just use a hand held tach on the PTO shaft. Doing it that way and wanting to set the engine RPM different than specs requires doing some math though.

wisbaker · Sep 21, 2012

Strobe tach will work regardless of the system voltage. There are also tachs made for small engines that you clip or touch a lead to the plug wire and you get an RPM readout, only thing is you have to flip a switch or read a different scale depending if it's a system that fires every 360 or 720 degrees, I would assume that would work on a tractor. On the strobes I've used you don't adjust anything, you attach a small piece of reflective tape on the shaft or pulley point the strobe at the tape pull the trigger and it gives you an RPM readout. Their are also industrial panel mounts that use a reflective, magnetic or even just a protruding steel target,like a bolt, I used those on applications when we had to adjust conveyor rpm OR count revolutions of a shaft

Bouncer · Sep 21, 2012

I use one of these to set the rpm on tractors, and it seems to be pretty accurate. It will do 1 thru 8 cylinders, and 2 or 4 cycle.
Clamp On Tach

tachometer

Anonymous-0

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Hayfarmer

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Janicholson

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D Slater

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wisbaker

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Bouncer

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