I have a daewoo dsl 801. Purchased used with 2000 hours. The original issue was that the power diminisished after about 30-40 minutes. I had all the filters changed, the hydraulics pumps replaced. It did not help the original problem but now the right side won't move. It spins in circles. The right side does not move at all. Has plenty of fluid. It sounds like it wants to work when I move the stick forward or back but nothing. Any ideas?
Bad pump section? Bad drive motor? Time to tie into the hoses from the tandem pump to the weak side drive motor with a flow/pressure meter to determine which.
I am going with bad drive motor. And by bad drive motor, it could be something internal or the external housing but my money is on that. Is the control H pattern or ACS? :my2c