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rick ky 
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Joined: 02 Oct 2009
Location: georgetown ky
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 Topic: 170 175 tach
Posted: 04 Apr 2024 at 5:36pm |
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put together allis motor 226 with alternator from 236 diesel, everything is coming together fine. red light works when key is turned on, goes out when oil pressure is increasing. alternator is putting out 14 volts. fuel gauge is working properly. temperature gauge working, increasing when motor is warming up. tach is running around 1,000 on low idle, but it buries the needle at half throttle. parts book shows 2 different tachs, 1 for gas and 1 for diesel. we know the tach is original for the dash, it is a gasoline engine tach. what thoughts are out there on how possibly to fix the problem? we want the tractor to operate as close to new as my nephew will have his wife driving the square baler while he is loading the wagon.
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JC-WI
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Joined: 11 Sep 2009
Location: wisconsin
Points: 33828
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Posted: 04 Apr 2024 at 5:47pm |
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Got the wrong size pulley on alternator?
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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."
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rick ky
Bronze Level
Joined: 02 Oct 2009
Location: georgetown ky
Points: 96
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Posted: 04 Apr 2024 at 5:51pm |
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what size is a suggested diameter choice. thanks for input
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captaindana
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Joined: 14 Sep 2009
Location: Fort Plain, NY
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Posted: 04 Apr 2024 at 7:46pm |
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If the rear of the alternator drives the tachometer, I thought there was different size gears in there for different applications
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Blue Skies and Tail Winds
Dana
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rick ky
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Joined: 02 Oct 2009
Location: georgetown ky
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Posted: 10 Apr 2024 at 6:29pm |
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just fishing to see if anyone has come up with any ideas on changing gear in alternator or what size pulley should be on alternator
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rick ky
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Location: georgetown ky
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Posted: 16 Apr 2024 at 5:02pm |
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okay boys and girls we have put the largest pulley on alternator. what suggestions do you mechanics have now. is it in the tach drive on back of alternator. thanks to anyone able to shed any info on this problem. thanks again
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Oldoug
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Joined: 12 Sep 2009
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Posted: 16 Apr 2024 at 5:16pm |
Check the drive gears on the alternator and count the teeth for starters...big gear should be 46 if I remember correctly...some people have accidentally put 43 tooth gears in them and the tach reads faster.
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Matt Folkers
FOLKERS RESTORATION
Restoring vintage things to last so the future can enjoy our past.
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rick ky
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Joined: 02 Oct 2009
Location: georgetown ky
Points: 96
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Posted: 17 Apr 2024 at 8:32pm |
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thanks doug
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