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hydraulic clyinder questions again

D

Dozer Guy

Member
When I put the ram (rod) back in the clyinder , is there a way to make sure there is no air in the system ? Or do I just put together and try to work the clyinder and force the air to the hydraulic tank ? Thanks in advance ! Larry
 
After you put the cylinder together, leave the lines slightly loose on both ends of it. when you cycle the cylinder, the air will escape out the fittings. Only move the cylinder once in one direction. In other words, extend the cylinder. As soon as you see oil seeping from the fitting, tighten the fittings on both ends. The cylinder should be full of oil and when yiou return the cylinder it won't suck air on the other end. Hope this helps. rw
 
Air will usually work out of a hydraulic system within a few cycles. Am sure I've gotten air in systems when replacing components, connecting/unconnecting cylinders, etc., in the usuak farming operations. Never been much of a problem. Had to replace out a hose in a power steering system once. Made noise for several days, but operated pretty normally. Assume it took a few cycles to get all the air out.
 
You could try to fill cylinder thru hose ports before assembling the lines - would get rid of most of the air.
 
There is no need to "bleed" the system. Thats why all hydraulic systems either have a breather on the tank or a breather built into the cap.
 
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