Hello, I have a CAT 303CR mini excavator. When I first start it, everything runs fine,(boom, bucket, etc.) after about 5 minutes all of the hydraulic functions begin to bog the engine down to where it almost quits (Tramming, boom, bucket, etc.) I quit using the hydraulics and it throttles back up. I have replaced the fuel filters and checked the air filters. Any advice or help would be appreciated. thanks
From your description it sounds as though the torque control spool is not working to reduce the load when the oil gets hot. I wonder if there is something sticking in there..?
Yes, like Nige says you will need to do some diagnostic work. No turning knobs LOL. First start with what is the maximum obtainable pressure hot compared to cold?