484 tachometer

Martin Reece · Apr 5, 2012

My tach stopped working on my 484. The needle just bumps up and down.What do I look for?

JimB2 · Apr 5, 2012

Hi Martin,
Is it a D-179 Diesel engine?
Most likely gear drive on the front of engine.
You can disconnect tach cable from gear drive and put an fwd/rev electric drill on tach cable and see if the tach works. Can't remember which direction to run the drill. If tach still doesn't work it could be a broken cable. If you live in a cold climate, moisture will get in the tach cable and freeze and when engine starts it will twist the squared end of the tach drive cable.

The other option is to unscrew the tach drive cable off the back of the tach and start the engine and make sure the drive cable turns. If it turns properly then problem is in the tach and will require a tach rebuild. Someone on this board mention a company to rebuilt tachs but don't remember if it was all tachs or only digital tachs.

Hope this helps
JimB

Martin Reece · Apr 6, 2012

Thanks kindly Jim. I will have a look. It is the diesel, and I do live in a winter climate. It was a cold day when it stopped working.
Martin

Farmallhal · Apr 6, 2012

You might contact Metro Speedometer & Electric, LLC in Independence, Missouri if your tach needs repair. They advertise in Red Power magazine and repair or restore tachs but no mention of which types. Their website is: metrospeedo at sbcglobal dot net and phone no. is (816) 478-0116. Hope this helps, Hal.

Martin Reece · Apr 7, 2012

Thank you Hal.

484 tachometer

Martin Reece

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JimB2

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Martin Reece

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Farmallhal

Well-known Member

Martin Reece

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