Sorry it didn't get the first part of my thread this is a kx 121-2 kubota mini excavator stick,thumb and left track are all jerking when extending a retracting stick or thumb left track is also jerking all follows p2 side of pump. Thanks
Without knowing squat about that machine, typically pulsing is one or more bad pistons in the rotating group of a variable displacement pump. Have you cut open the old hydraulic filters?
Haven't pulled the filter off yet going to in the next couple of days this pump doesn't have but about 400 hours on it .thank for the info the pump is about 6 years old though.
Sounds like a bad pump
Any way to switch your pump lines to see if the problem persists on the other side