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Shovel Control Valves
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LostDog88 View Drop Down
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Joined: 14 Sep 2017
Location: Puyallup, WA
Points: 9 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LostDog88 Quote  Post ReplyReply Direct Link To This Post Topic: Shovel Control Valves
    Posted: 26 Oct 2017 at 9:45am
I have the Simplicity/Allis 9020/720 and the boom on the backhoe is drifting when I release the stick. It has 6 sticks to control everything.
I want to swap out this old control valve.
Anyone know what I should be "googling" to find a replacement?
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rustydollar View Drop Down
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Joined: 07 Aug 2017
Location: Manitoba
Points: 456 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rustydollar Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct 2017 at 9:57pm
Originally posted by LostDog88 LostDog88 wrote:

I have the Simplicity/Allis 9020/720 and the boom on the backhoe is drifting when I release the stick. It has 6 sticks to control everything.
I want to swap out this old control valve.
Anyone know what I should be "googling" to find a replacement?


6 Bank motor spool valve
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rustydollar View Drop Down
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Joined: 07 Aug 2017
Location: Manitoba
Points: 456 		Post Options Post Options   Thanks (0) Thanks(0)   Quote rustydollar Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct 2017 at 10:12pm
Or you could replace the spools with electrically operated then install a joystick for ease of control.

With electric spools your dealing with wires from the joystick, keeps things neat and tidy.

http://www.oemoffhighway.com/operator-cab/operator-interface/joysticks/operator-interface/product/10257375/danfoss-danfoss-power-solutions-formerly-sauerdanfoss-js7000-joystick
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Coke-in-MN View Drop Down
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Joined: 12 Sep 2009
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Points: 41578 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct 2017 at 5:39pm
First off is the drift from valve body or a internally leaking cylinder - drift is generally when pressure is unequal between ends of piston and fluid on back side of movement direction - so a void or open flow no non pressure return side  - bypass of packing is another thing 
Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something.
"Challenges are what make life interesting; overcoming them is what makes life meaningful."
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