lost loader pressure

Tony in Mass. · Oct 22, 2009

In a failed experiment to get power steering back under a Cockshutt540, I tried to tap into the loader 4 way valve- spinal to some folks- I've done stuff like this before, usually worked out find, once nearly killed myself- but this time I messed up, and ran out of ideas. Not only did the loader pump not help the steering, I lost all pressure in any direction- I had airbound lines before, this isn't working itself out- this time I feel really dumb- any ideas how to get me going again? It's a big old industrial wagner. Thanks in advance- Tony

Kansas Cockshutt · Oct 23, 2009

Where is the loader getting its pressure, does it have an added pto pump, or a pump added on and driven by the engine?

Factory set up was a small vickers pump and reservoir belt driven off the motor to provide pressure to the char-lyn torque generator.

I hope you are not trying to use this small pump for both. The pump on the governor that supplied pressure for the 3 point hydraulics was not much better. You need a lot of volume for a big loader.

If have added a pump somewhere, and are trying to run both power steering AND loader off this added pump, you need to run a priority valve, or you will indeed have problems, neither will work very well.

Kansas Cockshutt · Oct 23, 2009

(quoted from post at 22:51:28 10/22/09)

Factory set up was a small vickers pump and reservoir belt driven off the motor to provide pressure to the char-lyn torque generator.

This would be the best way to get your power steering back, return to using just the small stand-alone system for power steering, and leave your loader circuit alone, so it can get as much flow as possible so your "pressure" returns.

Anonymous-0 · Oct 23, 2009

I used a pump from a Chevy van. Pretty easy to modifiy the bracket and connect lines with compression fittings. It works well.

Tony in Mass. · Oct 23, 2009

Gosh, thanks for all the fast replies guys. OK, the ps WAS a Cessna pump off its own fan belt- I can spit hader than that. So I tried to tap into the Wagner valve with pressure coming from a huge pump coming off the front pulley, but at an angle thru the steering casting, held up by its own brackets up front etc. My big pickle is that I did something to keep the loader cylinders from building pressure, and I am in the middle of the driveway, with a dead weight bucket sitting on the ground and I need to be able to move it out of the way, power steering or not. I will go out today and try to prop the loader frame up with 4x4's or a chain, but I kinda need that loader to work again. besides messing with a detant spring- which I put back just as I found it, the only other thing I can think I screwed up in getting it airbound- any more ideas??? help!

Paul Janke · Oct 23, 2009

I don't know if I read things right, but it sounds to me like you have two open center systems. You essentially put a T in the line after the pump. If this is the case, the only way to make either system work is to use both systems at the same time so the oil will take the path of least resistence and move the easier of the two loads. If you try to use either of the two without trying both at the same time then the oil will again go the easiet way which is through the circuit not being activated and straight to the reservoir. This is all subject to my having read it right. Paul

Joe(TX) · Oct 23, 2009

You cannot simply tee the valves together since you have an open center sytsem. You have to hae the valves in series with one being a power beyond valve.

lost loader pressure

Tony in Mass.

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Kansas Cockshutt

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Kansas Cockshutt

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Anonymous-0

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Tony in Mass.

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Paul Janke

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Joe(TX)

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