We have a 1981 Deere 850 dozer that wont go straight. When I go forward for 2-3 meters, it starts slowly creeping to the left. After sometime, it keeps going to the left more sharply. Same thing happens when you put the machine in reverse. Any ideas??
Serial number please. And letter if any...850...850B?
I have been treating it as a straight 850 dozer, could not find any parts with 850-D. The serial number is 365030T
It is a straight 850. The "-D" means nothing. See attachments.
Does it creep to the left in reverse too?
You will need to adjust your hydrostat pumps and motors. You have what is call a "C" track problem, your left pump and or motor is out of sync with right.
Maybe it's a Nascar dozer