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PTO safety switch


 
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Duke49
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PostPosted: Thu Nov 25, 2021 10:33 am    Post subject: PTO safety switch Reply to specific post Reply with quote

Wires that were soldered to pto safety switch came apart. I have two red wires and 2 whites. No markings on switch or wires. Does anyone know how I can figure out which wires go where on this switch. Thanks in advance





This post was edited by Duke49 on 11/25/2021 at 10:36 am.

 
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Jim.ME
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PostPosted: Thu Nov 25, 2021 2:35 pm    Post subject: Re: PTO safety switch Reply to specific post Reply with quote

Duke49 wrote:
(quoted from post at 14:33:07 11/25/21) Wires that were soldered to pto safety switch came apart. I have two red wires and 2 whites. No markings on switch or wires. Does anyone know how I can figure out which wires go where on this switch. Thanks in advance





This post was edited by Duke49 on 11/25/2021 at 10:36 am.


Sorry the wires pulled out but likely it will help if you give more details; like what tractor you have.
 
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Duke49
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PostPosted: Thu Nov 25, 2021 5:13 pm    Post subject: Re: PTO safety switch Reply to specific post Reply with quote

Oh sorry...It is a Massey ferguson 431
 
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Jim.ME
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PostPosted: Fri Nov 26, 2021 3:35 am    Post subject: Re: PTO safety switch Reply to specific post Reply with quote


That may take using the wiring diagram and "ringing out" the wires and switch terminals to see which goes where. The other option is to buy a new switch which will have that plug in pigtail attached.

AGCOpubs will have the Operator and Service manuals. They will also have the parts book if you want to purchase one of those as well, rather than use the on-line parts book. There is a customer service phone number at the upper right of their home page, which you can call and ask if the wiring diagram is in the Operator's or Service manual, if you only want to buy one manual at this time. (MF put wiring diagrams in a number of older Operator's Manuals over the years, I'm not sure about yours.)

https://www.agcopubs.com/
 
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Duke49
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PostPosted: Fri Nov 26, 2021 11:08 am    Post subject: Re: PTO safety switch Reply to specific post Reply with quote

[quote="Jim.ME"](quoted from post at 04:35:58 11/26/21)
That may take using the wiring diagram and "ringing out" the wires and switch terminals to see which goes where. The other option is to buy a new switch which will have that plug in pigtail attached.

AGCOpubs will have the Operator and Service manuals. They will also have the parts book if you want to purchase one of those as well, rather than use the on-line parts book. There is a customer service phone number at the upper right of their home page, which you can call and ask if the wiring diagram is in the Operator's or Service manual, if you only want to buy one manual at this time. (MF put wiring diagrams in a number of older Operator's Manuals over the years, I'm not sure about yours.)

https://www.agcopubs.com/[/quote

Well the first option maybe out as ringing out wires per diagram is definitely something im not familiar with doing. I will see if I can find it though. I didnt really have time to order another switch so I will try the first option.
 
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Jim.ME
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PostPosted: Fri Nov 26, 2021 11:41 am    Post subject: Re: PTO safety switch Reply to specific post Reply with quote

[quote="Duke49"](quoted from post at 15:08:05 11/26/21)
Jim.ME wrote:
(quoted from post at 04:35:58 11/26/21)
That may take using the wiring diagram and "ringing out" the wires and switch terminals to see which goes where. The other option is to buy a new switch which will have that plug in pigtail attached.

AGCOpubs will have the Operator and Service manuals. They will also have the parts book if you want to purchase one of those as well, rather than use the on-line parts book. There is a customer service phone number at the upper right of their home page, which you can call and ask if the wiring diagram is in the Operator's or Service manual, if you only want to buy one manual at this time. (MF put wiring diagrams in a number of older Operator's Manuals over the years, I'm not sure about yours.)

https://www.agcopubs.com/[/quote

Well the first option maybe out as ringing out wires per diagram is definitely something im not familiar with doing. I will see if I can find it though. I didnt really have time to order another switch so I will try the first option.


When I said "ringing out", I meant you need to find where each of the four wires goes to on the other end from the switch using a continuity tester of some type, or physically following each back to the other end. Then you need to use a continuity tester to figure out which terminal of the switch would go to which wire based on how the contacts switch interact when the plunger of the switch is depressed. The wiring diagram would help in this task and you can get the books electronically from AGCOpubs, very quickly. It looks like the switch number is: 0017373U91. You can see what your MF dealer says about getting one if you haven't checked. It shows up on the "REAR AXLE - PTO-COVER ASSEMBLY" page of the on-line parts book.
 
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