Stevensev
New Member
I have a 2004, CAT 305 CR and I am having a problem. The machine runs smoothly for approximately 1.5 to 2 hours and then gradually looses power to the point that the engine stalls when performing lightly loaded hydraulic movements. I can prevent it from stalling by eliminating the load. It does not seem to matter which functions I am performing, aka moving the tracks, boom, blade etc. The hydraulic oil seems to be hot, but I have not taken a measurement and am not sure what "normal" is.
There is sufficient hydraulic oil, I have not changed any of the hydraulic filters, air filter or oil filters yet. There is sufficient coolant and the radiator becomes quite hot to the touch, but there is no sign of overheating from the guages aka the water temperature is always in the middle of the green bar dial. The thumb hydraulic control is sticky, as in I need to make sure the left foot pedal is in neutral or else the valve is continuously on. I think the valve needs to be replaced or repaired.
I am a novice. My hypothesis is that the hydraulic oil is not being sufficiently cooled by the radiator and becomes too hot causing power issues. I only think this due to the fact there are two low pressure lines from the coolant pump, which seem to go towards the hydraulic system ( I assume there is a radiator for the hydraulic oil??), which are not hot at all. Thus maybe there is a blockage or the fluid is not circulating through that circuit. Any help would be much appreciated.
There is sufficient hydraulic oil, I have not changed any of the hydraulic filters, air filter or oil filters yet. There is sufficient coolant and the radiator becomes quite hot to the touch, but there is no sign of overheating from the guages aka the water temperature is always in the middle of the green bar dial. The thumb hydraulic control is sticky, as in I need to make sure the left foot pedal is in neutral or else the valve is continuously on. I think the valve needs to be replaced or repaired.
I am a novice. My hypothesis is that the hydraulic oil is not being sufficiently cooled by the radiator and becomes too hot causing power issues. I only think this due to the fact there are two low pressure lines from the coolant pump, which seem to go towards the hydraulic system ( I assume there is a radiator for the hydraulic oil??), which are not hot at all. Thus maybe there is a blockage or the fluid is not circulating through that circuit. Any help would be much appreciated.