Posted by shoptek on February 20, 2010 at 06:03:16 from (207.32.58.180):
I have a MM 670 Super tractor that the hydraulics have started acting up on. When I raise or tilt the bucket (it has a loader on it) the hydraulics jerk and sometimes stop. I changed the filter and the oil is full. It acts like it has air in the line but it doesn"t that I know of. I put a pressure gauge on it and it will produce 1400# pressure so it will pump pressure. It also has lift capacity as it will lift a full bucket of snow if it wants to. It will also raise the front end off the ground with down pressure. It just acts like the pump is not getting oil. Anybody have these old gear pumps apart or what should I look for.TIA
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