Komatsu pc50 uu2

[Tiny69]

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.

 

[Tiny69]

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

 

[Jaxo]

Did you check the hydraulic oil and for clogged filters.
or is it only boom and stick?
I have a PC45 - Great machine.

 

[Tiny69]

I check and replaced all of it and all it is is stick in and boom up

 

[manref01]

Have you check you port relief valves for the two functions

 

[Tiny69]

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

 

[heymccall]

There are screens in the inlet fittings to the pilot controls. They need checked, and possibly cleaned.