Combines 7720 noise

[h]

you might have a eng. power shaft bng. out. this bng.is behind the double sheave on the shaft that drives the ground drive belts under the seat.it is supposed to be greased . it is easily forgotton.also where the eng. shaft drives off of ths eng. this coupling could be broken if the bng.is out.i have cut a hole in the housing to change it.the motor has to be removed if you do not cut a hole to change the coupling.

 

[allgreen]

Our old 7720 did the same thing.Our john deere didnt know what it was.

 

[allgreen]

Our old 7720 did the same thing.Our john deere didnt know what it was.

 

[Roger]

Mine does that too, I used to be able to speed up faster than I wanted to run then pull back slightly on the hydro lever and it would quit whining, after I had the hydro rebuilt last year it whines All the time no matter what.

 

[sri]

I think it is the bearings and gears getting a little worn,also could be coming from final drives.If it really bothers you try changing a few bearings.Probably in the final drive ,top bearings as this is a high strain area.Also a couple of high strain bearings in transmission.Most combines get this after years of use,mine does this occasionally and will only get louder as time goes by.Although I don't think it anything real serious.

 

[STEVE]

ITS YOUR CYlINDER ITS SET TO ClOSE TO lEFT SIDE SEEN THIS IN AlOT OF COMBINES JUST lOSSEN BOlTS ON SHAfT AND PRY IT OVER UNTIl ITS EVEN.