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Gleaner A header cylinders
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jaybmiller View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Location: Greensville,Ont
Points: 24658 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Topic: Gleaner A header cylinders
    Posted: 10 Aug 2015 at 6:10am
OK, dumb question but just HOW does the header manage to stay up for ever? I mean every other hydraulic system I've had/seen sooner or later whatever is up does come down ! Usually the weight of the load will push the oil backwards.
Just curious, like my new kitten.

Jay
3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

Never burn your bridges, unless you can walk on water
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MACK View Drop Down
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Joined: 17 Nov 2009
Points: 7664 		Post Options Post Options   Thanks (0) Thanks(0)   Quote MACK Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2015 at 7:32am
Most hydraulic valves only use a fit to spool to keep oil from returning. The header valve uses a poppet to keep oil from returning that takes hydraulic pressure to unseat it. Does two things that most other valves don't do. #1 a safety to keep header from going down unless there is oil pressure to let it down. #2 keeps header from leaking down over time. MACK 
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