I get a sqealing noise sometimes when I am just driving the machine. It loses very little power that is noticeable and when the sqealing stops the power comes back. It feels like you have a little drag similar to a break pad sticking. But I know there is break pad sticking. Also if I depress the petal to lower bucket and when it is fully down I get the sqeal noise. When the bucket is fully down and if I don't release the petal as soon as the bucket is all the way down the squeal will go away after about 3-5 seconds. I changed the hyd. filter and the fluid level is good. It does have lifting power I have 3300 hours on the machine. Any ideas??? I do not have a pressure gauge to test the pump is there some way I could test it with out a gauge??? thanks