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Old 09-26-2010, 04:34 PM
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Ironman Ironman is offline
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Location: Warburg, Alberta
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Quote:
Originally Posted by Whitetrash View Post
Is the directional valve for the motor open center? I'm wondering if bringing the mast down creates a flow bottleneck on your return side of the system. especially since you say the mast comes down fine once the engine stalls. Which kills the extra flow from the pump. If the valve for the motor is open center you have another return path for pump output. If not I'm thinking you need more capacity flow wise on your return side
First off, the original hydraulic system is untouched. I have tapped my pressure system into the old pump output and even used the original hose. So I can't see any thing wrong with that part of it.
What I don't know much about, no matter how many times I have used them, are flow control valves.

Trash, I think you are onto something. The motor direction control valve is open center. If there is a floating shuttle spool in that flow control, then maybe back pressure would force it into a position that closes flow from the pump. I have had, and used, power beyond type of flow controls before and I guess this one may not like back pressure.
I spect the filter will have a certain amount of resistance to flow as well.

I guess the solution at this point is to spud another fitting into the hydraulic tank...nice, now its full of oil. Then put in a flow divider and feed one divider output to the mast and one output to the flow control valve. The FC valve will dump straight back to the tank with out filtration through the new tank port. And the motor return to tank can still be hooked as it is through the filter.
Soooo, I have to go to town next.

ORF, the muffler is there so it's easy for someone to pump smoke up my ass about global warming. And this year has been a miserable cold one.
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