Hi, after some advice. We have a 2005 kx161-3 digger. All hydraulics work well when machine is cold. As soon as machine has run for a while all the hydraulics , arm tracking etc go sluggish. I’ve changed suction and pilot filter, replaced hydraulic oil. Had a fitter test the pressure on the pump and suggests pressure is ok. Interestingly if I blip the revs down and then back up the speed of the hydraulics pick up temporarily. Any thoughts on what else it could be ? Thanks
Have same problem, did you solved it ? I think problem is main pump