hey there I have to John Deere 690 elf that is loosing power ONLY when I track, doesn't matter if I'm in high or low speed it dies and starts black smoking, has had a lot of work done we put new linde pump, everything else works fine when digging or swinging it doesn't die until you move wondering what everyone thinks we are missing! Thanks
Machine serial # ? What happened to the main hydraulic pump ? Does the engine sound like it is loading up roughly the same amount when stalling the bucket over relief or stalling 1 track over relief ?
Sounds like maybe the load piston that actuates the swash has a broken seal ring and is getting stuck