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How do I take apart the pump seals? I've se n the ones with a hex and those can be spun off. With the circular top fitting I can't figure out how to get it off. It spins but doesn't unthread

Hand pump is not pushing any fluid out return port, return line is sending fluid to pump. There was significant restriction blowing into the return port. It appears on the bottom of the direction selector there is a very small orifice fluid has to pass through. I removed this and replaced the...

Well you were right about it being a valve. Looking closer it appears to be an intentional bend in the little lever. It rotates 180 degrees easily and it appeared to back flow. Still seems to run itself dry though when I put back into original position. I'll work on checking that return line next.

This is the one I have. That little metal tube sure looks like an overflow.

The pump does work normally until it runs out of fluid. Thanks for all the other info. I'm not sure mine is a sealed system as there is a short metal tube to the right of the handle. I think this may have been and a1 change as others I've seen have no tube?

When using the manual pump for any operation, it will run empty and not pump any longer. Thinking the fluid might be a little low, I refilled the manual pump tank, but I'm noticing it's pumping fluid into the air over oil pump reservoir, this caused it to overflow. Guessing is a check valve...