I have a t190 with about 2500 hours on it. It is a pedal machine with a BICS valve. We were using it to load some light sand and in the course of an hour it went from lifting and dumping fine to barely being able to get the bucket off the ground. We parked it and the next morning replaced the hydraulic filter and tried again. This time it worked fine for about an hour, then it went back to barely functioning. The hydrostatic drive works fine, so we were able to get it back to the shop where I almost couldn't get the bucket up to prop in position. I looked it over and at that point I might as well have been looking inside someone's skull for what I knew about it. I am a half decent mechanic but failed to get to the bottom of the problem, so I took it to Bobcat and paid for a diagnosis. They said that besides a new seat cover and headlight needed!, that my hydraulic pump was putting out only 1800psi with no info on flow rates. I took the machine home and am not convinced that with the pump putting out that much pressure it would be unable to raise an empty bucket. Could the problem be in the BICS? or does someone have another idea?