I have a Bobcat 743 and I moved a cement slad today and then went to the other side of the slab and had very minimal lift arm and bucket curl movement. I have no fluid leaks, hydraulic fluid is fine and machine was at full power. The bucket took aprox. 30 seconds to lower about 4 inches. It currently will not move the bucket or arms. Have been using for months without issue until today. Filters and fluid were gone through last fall. Is this a pump issue or where should I start. I haven't tried anything yet.