Got my 1990 deere 70d. When traveking the left track has a wee bit less power but when cold and turning the machine it has power. When hot like after 2 or 3 hours no power at all unless I move both tracks? Manifold or travel motor? Going to rig up a pressure Guage once my basement is done. Hope its not travel motor I hear thats terminal.
Sounds like swivel/rotary manifold. Later Bob
I agree with Bob.
Sometimes on certain machines the weak travel will only be on one side in one direction or it might change side in the reverse direction. I would suggest checking that before anything else. That usually would be proof of a bad seals in the swivel. You should probably do cycle time time tests on the rest of the functions. The list of culprits start at the swivel, possibly a weak motor and maybe a weak pump if your machine has more that one. A weak pump will affect other functions and slow the cycle times. Good Luck!