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Tach/hourmeter
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MrSnerdly View Drop Down
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Joined: 11 Jan 2024
Location: fairbury ne
Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrSnerdly Quote  Post ReplyReply Direct Link To This Post Topic: Tach/hourmeter
    Posted: 04 Feb 2024 at 7:41pm
The hour meter works in my 7030 but the tach doesn't.  I think this means a new tach but is there any possibility there is something that could be done to repair?  If not, is the dealer the best place get a get a new one?
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 81065 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2024 at 8:28pm
read this for vendor info...
Like them all, but love the "B"s.
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Lynn Marshall View Drop Down
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Joined: 13 Sep 2009
Location: Dana, Iowa
Points: 2282 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lynn Marshall Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2024 at 8:38pm
The tach in the 7000 series  all receive an electric signal from the alternator.  Check the alternator and all the connection leading into the cab.
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MrSnerdly View Drop Down
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Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrSnerdly Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2024 at 8:50pm
If the hour meter works doesn't this mean it is getting a signal?
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Lynn Marshall View Drop Down
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Joined: 13 Sep 2009
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Points: 2282 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lynn Marshall Quote  Post ReplyReply Direct Link To This Post Posted: 04 Feb 2024 at 10:18pm
That's kind of a good question. But, I don't think so. The tach has a positive and negative terminal on the back and I think that the positive is just key switched. With the key on, engine off, can you see the hour meter move or even hear it click?  The tach receives it's signal from the alternator and it is a variable signal so that the sweep hand corresponds to the increase in RPM from the engine. I don't believe that it has anything to do with the hour meter.
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Lynn Marshall View Drop Down
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Joined: 13 Sep 2009
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Points: 2282 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Lynn Marshall Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2024 at 8:01am
I should have asked if this tractor has a Delco or Niehoff alternator. Not that it really makes a difference. They both operate on the same principle.
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MrSnerdly View Drop Down
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Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MrSnerdly Quote  Post ReplyReply Direct Link To This Post Posted: 05 Feb 2024 at 4:56pm
Well, the hour meter does work with the switch on and motor stopped.  It has a Delco alternator.  I will try to check out a few things tomorrow when it is a little warmer.
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