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170 voltage regulator
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D17Milo View Drop Down
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Joined: 11 Dec 2017
Location: Milo,Iowa
Points: 65 		Post Options Post Options   Thanks (0) Thanks(0)   Quote D17Milo Quote  Post ReplyReply Direct Link To This Post Topic: 170 voltage regulator
    Posted: 04 Sep 2020 at 6:10am
Just changed the alternator on my 170, now I have to high of voltage. I will replace the regulator, any opinion on what to use, solid state vs manual. The alternator is a 1100735 Delco, at 1500rpms it is putting out 17 volts. Thanks for all your help.
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BigGuy1000 View Drop Down
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Joined: 06 Dec 2013
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Points: 129 		Post Options Post Options   Thanks (0) Thanks(0)   Quote BigGuy1000 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2020 at 7:25am
17 volts is too high!  Will cook the battery!  But do not use a modern digital meter to measure this, as they do not read properly due to electrical interference!!! Use an old style moving needle pointer meter instead.
AC 170 had some wiring, starter, charging system changes during the time of production, you will need to find the serial number of the 170 to get the proper starter and charging system parts or part nos. from your Agco dealer.
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
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Points: 11979 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2020 at 7:58am
Make sure your VR is grounded correctly. Also, make sure you don't have a wire pinched or rubbed through somewhere in the harness. When a ground is introduced to the system somewhere, the VR ramps up the Alt to compensate for the load causing a overcharge condition.  HTH
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Steve in NJ View Drop Down
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Joined: 12 Sep 2009
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Points: 11979 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Steve in NJ Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2020 at 8:01am
Make sure your VR is grounded correctly. Also, inspect the wiring for a rub through or a pinched wire. Introducing a ground to the system will make the VR ramp the Alt up trying to overcome the load. We have the correct VR in stock for that 735 Delco if interested.
Check those conditions first though...
Steve@B&B
39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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Alvin M View Drop Down
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Points: 800 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2020 at 8:12am
Agco Part # 70243986 Used By A Lot Of Brands With Delco Alternator 
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