Re: Aftermarket Tachometer: Need a Novel Idea

Posted by Bob M on May 14, 2004 at 08:33:24 from (165.170.128.66):

In Reply to: Aftermarket Tachometer: Need a Novel Idea posted by Novel Idea Guy on May 14, 2004 at 07:32:46:

Several “novel” ideas for you:

1 – Replace the existing alternator with one with a tach drive. This is a standard Delco 10SI modified to provide a standard tach cable drive out the back end. Were used on some MF and Case tractors for a while. Last time I checked TISCO cataloged them. Problem is they cost more than a standard alternator. And there will probably be drive ratio issues with your existing tach head.

2 – My Kenworth (Cummins-diesel) is equipped with a magnetic drive tach. A sensor screwed into the bellhousing senses flywheel ring gear teeth going past and sends an RPM signal to the tach head in the dash. It works great, but probably would be expensive to retrofit/calibrate to a tractor.

3 – Purchase a diesel tach that taps A.C. off the alternator. These are used a lot in marine applications - they work great. Teleflex is one manufacturer – I’m sure there’s others. Punch below for installation instructions from the Teleflex website. Teleflex stuff is readily available thru marinas, discount marine mail order houses, etc.

• Teleflex diesel tach

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