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New altenator Yanmar 169

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jman50
Join Date: Jul 2018
Posts: 2 Florida
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-02          197829

I am replacing the original alternator on a Yanman 140YM69 (bad bearings) with new HAL-1215 alternator. Orginal wiring on old alternator had 2 wires wired with wire nuts no plug to tractor wiring. I installed new alternator, then with tractor running I now measure 25 volts AC at new alternator. My question as this is AC volts , I assume polarity should not be of concern when connecting to the tractor wiring? The other question is the 25 volts normal at a high RPM of tractor it looks pretty constant even when RPM reduced? Wires travel to what is shown on print as a current limiter. Any advice would be appreciated. I am trying to be a little cautious here before connecting wires to current limiter. Thanks

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New altenator Yanmar 169

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jman50
Join Date: Jul 2018
Posts: 2 Florida
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-02          197830

New alternator AL 1215 ....

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Yanmar Tractors New altenator Yanmar 169
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New altenator Yanmar 169

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jman50
Join Date: Jul 2018
Posts: 2 Florida
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-02          197831

Print designated current limiter ....

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Yanmar Tractors New altenator Yanmar 169
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New altenator Yanmar 169

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jman50
Join Date: Jul 2018
Posts: 2 Florida
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-02          197832

Print from tractor manaual ....

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Yanmar Tractors New altenator Yanmar 169
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New altenator Yanmar 169

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winston1
Join Date: Sep 2010
Posts: 85 gilmer,texas75645
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-03          197833

https://www.hoyetractor.com/support/knowledgebase.php?article=44

25 volts is fine. ....

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New altenator Yanmar 169

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BigRol
Join Date: May 2015
Posts: 4 Cape Breton
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-03          197834

25 volts AC? on 12 volt DC system, not good, your voltage regulator is probably the rectifier also and not working or bypassed. you will smell the battery and eventually fry it with AC voltage, your alternator is full fielding at 25 volts,
Hope this helps ....

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New altenator Yanmar 169

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winston1
Join Date: Sep 2010
Posts: 85 gilmer,texas75645
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-03          197835

His dynamo puts out ac voltage, the regulator/rectifier changes it to about 14dc volts. Don't think he wanted to hook up the regulator until he was convinced it didn't make any difference which way the two wires hooked up. ....

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New altenator Yanmar 169

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BigRol
Join Date: May 2015
Posts: 4 Cape Breton
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2018-07-03          197836

Lol, that sounds better I was assuming he was checking at the battery for voltage. ....

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