Long 510 diesel fuel problems?

[Flyman59]

I have a Long 510, it is a good tractor but during hay season we were baling with it and the rpm's suddenly jumped to full throttle then came back down to normal. It did this a few times then quit. Changed all the filters, bled the system and it ran fine for a couple weeks then it did it again. I cleaned the tank, used a compressor to make sure all the lines were clear, cleaned the screen in the lift pump and it started right up after bleeding the system but after about an hour of running it did it again. Could the lift pump be bad? It runs strong and has no loss of power, the rpm's just jump up and down and then it quits. I don't know what the signs of the injector pump going bad would be. Thanks for any help.

 

[luvmexfood]

I have a Long 510, it is a good tractor but during hay season we were baling with it and the rpm's suddenly jumped to full throttle then came back down to normal. It did this a few times then quit. Changed all the filters, bled the system and it ran fine for a couple weeks then it did it again. I cleaned the tank, used a compressor to make sure all the lines were clear, cleaned the screen in the lift pump and it started right up after bleeding the system but after about an hour of running it did it again. Could the lift pump be bad? It runs strong and has no loss of power, the rpm's just jump up and down and then it quits. I don't know what the signs of the injector pump going bad would be. Thanks for any help.

Have heard that is a sympton of an injector pump going bad but not sure. I did have one race up to wide open one time then the injector pump threw metal out the side. You can get a fuel pump for around $30 bucks on Ebay replace and try. If that's not it then you will have a spare.

Just a heads up. If you ever have to take the output line off the hydraulic pump be very careful when putting the line back on. The screw are soft and will shear in a heartbeat.