Electrical: 64 GT tach sticking

[jostanton1]

The tachometer needle in my 64 GT Hawk is sticking. Are there any instrument repair places that can properly open this thing up, lubricate it and then close it back up? I have pryed open smaller gauges and speedometers before, but closing up the flange afterwards leaves them looking pretty bad! Since the tachs are very rare, I'd had to mess this thing up!

[Jeffry Cassel]

My luck with these places runs from bad to worse. Auto insruements used to do a decent job but the last tach I sent took nearly a year. Don't use Bob's! Swap meet? Parts wanted on forum?

[bensherb]

Assuming you don't have a mechanical tach, there is nothing in the tach to lubricate. By sticking do you mean it goes up to about 1500-1800 rpm and stops? If this is the case, it's either RF interference, or the electronic control unit has gone bad, or both. You can test the Tach "head unit" itself. For every 1 volt DC it will move aprox. 1500 rpm, the full range will take 3.9 volts.

1962 tach:

[jostanton1]

Thanks for the tip!

[bezhawk]

I have seen the magnet ring hit the moving coil. It usually happens about 2000 rpm point on the dial. You have to leesen the screws and re-adjust the ring to clear for full sweep.
I do gauges all the time.

[Colgate Studebaker]

I'd suggest you send it to Brad. He is a master at restoring gauges. Bill

[kurtruk]

I have seen the magnet ring hit the moving coil. It usually happens about 2000 rpm point on the dial. You have to loosen the screws and re-adjust the ring to clear for full sweep.

This is the problem I had on my 62 GT.

[jostanton1]

How do you open them up cleanly, and close them?

[bezhawk]

I made tools to close them back as close to original as possible, NEVER tap or HIT an instrument to fold over the bezel. They were designed to be rolled on, and that is exactly what I do, a hammer is never in the equation.

[Kato]

I have seen the magnet ring hit the moving coil. It usually happens about 2000 rpm point on the dial. You have to leesen the screws and re-adjust the ring to clear for full sweep.
I do gauges all the time.[ATTACH=CONFIG]82565[/ATTACH][ATTACH=CONFIG]82566[/ATTACH]

This is exactly what happens with my tach. stops at about 2100rpm.