I just brought my 1816 case back to life . new pumps and drive motors, chains and so on. the problem I have now is the utility pump slows way down and over heats the clutch unless you use a bucket or cradle lift function. this seems strange ,but you can see the speed increase when using a lift function, but you can see the pump almost stop when you bottom out the bucket control. is there a blockage in the valve that could be causing this. ive checked the hose routing and all looks good. if I let the machine run long enough the belt will burn off.