Originally Posted by Quick68
Hi Tom & Jeri
That was a thought I had....looking into the fill spout of the reservoir it looks as if it would suck up the hydro oil into the vacuum hose.... Mine is visible at the top of the fill spout. A friend of mine and myself were looking at that possibility but we thought it might suck up the oil so we gave up on that thought. It is a great idea, but not sure if that will work??I'm thinking that there should be a ball-valve on the bottom of that reservoir for this kind of issue. That is a thought I think i will install a ball-valve on the bottom of that reservoir so I can shut off the oil flow to that hose. that will make it possible for me to change the hose's.
That’s your call, of course, as only you can see what you’re dealing with. But you only have to put enough suction on it to prevent the oil from flowing out the suction line on the bottom until you can get it capped or extended or whatever you need to do. Our mechanics do that routinely on large hydraulic tanks, which on numerous machines in our charge don’t have ball valves on the suction lines (many pumps on a single tank).
Our own designs include ball valves on the suctions, but they have to be locked open and checked daily before starting. Running a pump with the suction closed will trash it pretty quick.
If you put a ball valve on the suction, make sure
to use a full-flow valve. Standard ball valves have a smaller passage than the pipe at either end, while full-flow valves have what amounts to a full-sized through hole so you don’t get added restriction. High suction line restriction can damage the pump through cavitation, especially when the fluid is cold.