Ford 2000 (3cyl) tachometer issue

Mr Mid State · Oct 4, 2017

I recently bought a Ford 2000 tractor. When I got it, the tachometer needle was broken off and the tachometer drive cable was bad. I purchased a new dash cluster and a new cable. Installation went smoothly.

Once started the tachometer came to life. But upon closer inspection the tech was reading roughly twice the actual RPM.

I installed the old dash cluster again and it also read too fast.

I do notice the drive gear is similar to CAT yellow, Not Ford blue. This alternator uses the screw on tachometer drive unit, not the one that I have seen built into the back of some alternators.

Help please

sotxbill · Oct 4, 2017

suspect wrong generator.. or wrong size pully on generator or wrong generator tach gear on back of generator.....

Are you sure it reads too fast?

Destroked 450 · Oct 4, 2017

I've converted a few of my tractors with the alternator kit from this site, after installing the Lucas generators old pulley that I had bored to the correct size they still read 3-400 rpm higher than with the old generator drive.
Reason for the pulley change is the pulley on the conversion alternators isn't the correct width for the belt.
I used a digital tach to find 540 rpm on the pto which showed around 2200 on the tach, now when using a piece of pto powered equipment I set the tach at 2200 which I know is actually only 1800 rpm, even when I pull the throttle full open no matter what the tach shows I know the engine isn't over revving because the inj pumps governor is still limiting the engine to the same actual rpm's it alway's has.

Mike(NEOhio) · Oct 4, 2017

They are notoriously inaccurate anyway. My tach says PTO speed is 1800 with 6-speed. I put a tach on the shaft and it's really 1900.

Ford 2000 (3cyl) tachometer issue

Mr Mid State

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sotxbill

Well-known Member

Destroked 450

Well-known Member

Mike(NEOhio)

Well-known Member

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