JOHN DEERE 755 with issues

[Dalekyarng]

Thanks for all the responses..you all are great..

As you all know, I was trying to figure out why I can稚 get it to start and I opened a fuel injector. Inside is a nipple, a spring, and a shim.

I put all three back together but I cannot get it to thread and screw back down.

As anyone had their injectors open?

 

[beenthere]

Oh Oh !

 

[atsah]

I would say you now need to bring your injectors to a fuel shop and have them look at them.

They need to be torqued to spec after you get them fixed.

 

[Dalekyarng]

Let me catch you all up.
I ended up having the engine completely overhauled. The engine runs like a purring cat. BUT...
I'm still having issues with it when I push the peddles down it JUMPS forward or JUMPS back.. depending on which way I am going.

I was moving dirt today and i had it under a load and it would not JUMP.... it just crawls.

I know that the safety rod under the seat will cause it to do that.. but, I took a copper wire and it stays down now... the safety switch under the seat has been replaced with a new one.
Could it be the Hydraulic Pump?

 

[beenthere]

Not understanding what the "safety rod" under the seat is that you refer to, but see in the service tech manual that there is forward reverse speed control linkage that may need some fine tuning. But do not really know that, as hard to decipher just what the JUMPS are.. sudden jerking is what it sounds like to me.
Did this happen before the engine overhaul? What is the history of the transmission oil, filter, and screen changes?

Here is a 3d of the speed control linkage that is under the center between the foot rests. Hope this helps some.

 

[Dalekyarng]

Not understanding what the "safety rod" under the seat is that you refer to, but see in the service tech manual that there is forward reverse speed control linkage that may need some fine tuning. But do not really know that, as hard to decipher just what the JUMPS are.. sudden jerking is what it sounds like to me.
Did this happen before the engine overhaul? What is the history of the transmission oil, filter, and screen changes?

Here is a 3d of the speed control linkage that is under the center between the foot rests. Hope this helps some.

Jumping / Jerking.. either way it JERKS / JUMPS forward or JERKS / JUMPS back.. depending on which pedal I push. The linkage is what I am thinking.

It was happening before the overhaul and it continued after the overhaul.