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DougG 
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Joined: 20 Sep 2009
Location: Mo
Points: 8169
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 Topic: 6060 AC tach question
Posted: 20 Apr 2010 at 8:39am |
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Got a 6060 that the altenator went out last week, now the tach doesnt work correctly, its slow, bounces around, or just dont work at all ,at times ; wouls the altenator going bad afect the working of the tach ? The tach gets its reading from the alt, the wires good, belts tight , anyone run into this problem??
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skipwelte
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Joined: 29 Oct 2009
Location: Anthon, Iowa
Points: 723
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Posted: 20 Apr 2010 at 11:01am |
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The tach get its signal from one of the rectifiers in the alt. Make sure the connection are good at the alt and on the tach and double check how its hooked up. If everything is good and its still erratic you could have a bad signal from the rectifier in the alt. Usually an erratic tach means the alt is weak or dying. Good luck.
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DougG
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Joined: 20 Sep 2009
Location: Mo
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Posted: 20 Apr 2010 at 3:42pm |
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The connections are good, the tach worked fine till the old alt. started acting up; put a new alt. on and its charging correct but the tach is still screwing up; tried new wire and no change ;
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AllisFreak MN
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Joined: 07 Dec 2009
Location: Minnesota
Points: 1551
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Posted: 20 Apr 2010 at 3:43pm |
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Check the flat connectors at the alternator. I had to cut the wires and crimp on new connectors because they were rusty and didn't make a good connection and the tachometer would jump all over the place.
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'49 A-C WD, '51 A-C WD, '63 A-C D17 Series III, 1968 A-C One-Seventy, '82 A-C 6060, '75 A-C 7040, A-C #3 sickle mower, 2 A-C 701 wagons, '78 Gleaner M2
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John S. IL60099
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Joined: 17 Sep 2009
Location: Wadsworth, IL
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Posted: 20 Apr 2010 at 7:23pm |
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Given all the trouble I have had with altenators on 6080's I'd guess that your replacement alternater is not sending the same signal pulse as the original one did to your tach. Trying finding the tachometer specs on line and make sure the alternator specs match. Good luck this drove me crazy. I never did get it resolved to my satisfaction. Earlier tachs had dip switches to change the settings. The late model tachs in 6070/6080 did not have this feature.
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