Belarus 80 Amp Fuses Blowing

rasmussj · Dec 24, 2015

I have a Belarus 822 with the 12/24 volt system. It was starting up with no issues and then today when I went to start it, it made a clicking noise and I noticed the 80 amp shunt blown. I noticed the other 80 amp fuse was blown also and I replaced both of them. As soon as I pushed in the ground switch both 80 amp shunt fuses blew?? I tried replacing them again and they blew again as soon as I pushed in the ground switch. I was hoping that maybe someone else has already experienced this issue? Any help would be appreciated. Thanks

Russ from MN · Dec 24, 2015

Fuses usually blow for a reason, if you don't troubleshoot the system and find the reason you are just wasting money on fuses.

phil25 · Dec 25, 2015

There is a good short somewhere, and i would look at the 12/24 switch first? good chance the contacts have welded together, depending on the switch make you might be able to take it apart for a check and cleaning anyway?
a second choice is to install a low amp fuse in place of the 80's , disconnect the main lead at the starter itself,you should read with a volt meter 24v to tractor frame as if starting it normally, without blowing the temporary fuses.
I don't have the resistance value of the starter to ground, it will be low, but not zero, if you are getting the 24v and have the resistance, apply the math for amperage, the value might give you the clue.

IT could be possible the starter has shorted across the armature, and could it be that your main lead to the starter has chafed through and is touching the frame? but there should be other signs of sparks and smells if it was.
Maybe take a good look and "smell" around the switch/starter area as a clue to whats wrong, that much current should release some of the factory installed smoke ??
hope it helps

phil25 · Dec 25, 2015

Maybe this will get better results posted in the todays tractors section?
kind of an off topic for here.
Or look up a Belarus forum site, must be one out there somewhere.

GarryinNC · Dec 25, 2015

I think that they did away with the 'Today's Tractors' forum.

phil25 · Dec 25, 2015

Had to check myself.. but its third from the bottom of the forums main list

rasmussj · Dec 27, 2015

I kept thinking the problem was that 12/24 volt parallel switch box that sits between the batteries but it looks like it is the starter that has gone to ground. I appreciate your suggestions. Thanks for the help troubleshooting

Belarus 80 Amp Fuses Blowing

rasmussj

New User

Russ from MN

Well-known Member

phil25

Member

phil25

Member

GarryinNC

Well-known Member

phil25

Member

rasmussj

New User

Similar threads