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The cab and tire cylinders have safety check-valves built into them which will keep the load from falling if you should have a hose or fitting fail. There are restricted orifices in these circuits that keep the flow within the limits of the safety checks. The checks are basically a check ball...

yes and no... The lower hand pump is only connected to the manifold valve(port P2 & T2, and it is not vented. The lower hand pump can draw fluid from the upper reservoir but only if the lower pump/reservoir case pulls enough vacuum when pumping fluid out, to draw fluid past a 1PSI check valve...

Just fill it. In order to move fluid, work must be happening. If you are pumping and nothing is happening, you are not really admitting any air as fluid would have to move out of the way for that to happen. Cycling/operating the system will purge any air bubbles as they pass back thru to the...

it is probably low on fluid. When facing the pump there should be a little allen head plug near the front left corner. you can fill it with AW-32 hydraulic oil. AW-32 is 10 weight hydraulic oil which is what is specced for the system. It’s the go-to oil for just about anything with a...