Can anyone tell me why this case 9020 steers slightly to the right when running ahead?
First check the track, are they adjusted the same, are the bushings and pins worn more on one side, next check the pedals in the cab for dirt/rocks/ rags/bottle tops not allowing the same stroke of the levers/pedals, check the linkage to the pilot control valve, must stroke the valve fully on both pedals. Then you get into pressure checks, issues with the main control valve, swivel, track motors and brakes. Some of this can be fixed with just some adjustments and some will take alot of money. How maney hrs do you have on the machine?
You might want to check the valves that are under the travel sticks. I have replaced both of mine. When they start to fail, they lose some travel distance in them. Eventually they stick in either forward or reverse.