I have a Sumitomo excavator, size 240-5. The problem is that the movement of the excavator is always fast, which causes a rise in the temperature of the hydraulic oil, which leads to the weakness of the excavator when the temperature rises.Welcome to HEF tmsha!
Please start your own thread since you have a different machine than the one this thread was started with. When you start your thread, please give a more detailed description of your issues and also, please post a machine serial number.