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MF 165 generator and tach drive assembly

A

Anonymous-0

Well-known Member
I am trying to put a tachometer on my Minneapolis Moline GVI diesel and I have someone who has proposed I use a generator off of a MF 165 which does appear to be the same (i.e. same size, mounts the same, etc.). The Generator # is 1900341M91 and the tach drive they have proposed fits this generator and is 14 tooth drive and 43 tooth driven and apparently fits Massey 165 Tractors both the gas and diesel versions. They have also proposed I use a tachometer off of the MF 165. All this I believe will work fine but the one concern I have is the ratios of this drive. My tractor has a 2:1 ratio between the crankshaft and generator pulleys so I need either the generator drive or the tachometer to convert this ratio back so that I am reading the actual crankshaft speed. It appears that based on the gears in the tach drive that it is a 3:1 ratio instead of 2:1.

Are there other tach drive options that would work for my situation (i.e. 2:1)?

What are the pulley ratios on a MF 165?

Does the tachometer have a ratio built into it or is it just 1:1?

Any help/information would be appreciated. Thanks in advance for your help.
 
MF 35, 50, 65, and 85 gas tractors had generators with tach drives too. If you need change the drive pulley to get the correct tach reading. Also if alternator is desired with a tach drive these were on late MF 175 and 180 diesels, also on AC 190 XT and AC 200 models. Hope this helps.
 
Thanks for your response. Do you know if the tachs on these tractors had a ration conversation to them or was that done in the tach drive?

Also, what was the crankshaft pulley size relative to the generator drive pulley?

Thanks again for your assistance.
 
Not sure but I think all had same gear set with no ratio choices, speed change was done with drive pulley. I use a light/tape to read crank speed then change pulley size to adjust tach speed reading up or down as needed.
 
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