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AC 7040 RMP Tachometer
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SSLivestock View Drop Down
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Joined: 18 Mar 2012
Location: Reelsville, IN
Points: 6 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SSLivestock Quote  Post ReplyReply Direct Link To This Post Topic: AC 7040 RMP Tachometer
    Posted: 01 Apr 2012 at 10:34am
Just   curious where does  the Tachometer hook up in the engine compartment on a  7040  Mine only works about half the time.
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Lynn Marshall View Drop Down
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Joined: 13 Sep 2009
Location: Dana, Iowa
Points: 2381 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lynn Marshall Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2012 at 4:11pm
The tach senses the speed from the alternator.There's no mechanical cable or drive if thats what you are looking for,it's all electrical.Check your connections at the alternator and at the back of the engine where the engine harness connects to the cab harness.I guess a wire could even be loose at the back of the tachometer head.Does the tractor charging system seem to operate?
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