Guys i am having an issue with my excavator the boom up and stick in function at a very w rate when the hydraulic oil gets good and warm , to the point it functions will barely work i have tried everything even put a new pump on the machine any help would be greatly appreciated.
Excavator is a Komatsu pc50uu2
Did you check the hydraulic oil and for clogged filters. or is it only boom and stick? I have a PC45 - Great machine.
I check and replaced all of it and all it is is stick in and boom up
Have you check you port relief valves for the two functions
I had a mechanic check the valves he couldn’t find any issues I replaced the main pump all fliuds and filters it seems to just fall on its face when it gets hot i have seen where others have this problem but am yet to see the fix
There are screens in the inlet fittings to the pilot controls. They need checked, and possibly cleaned.