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Tool Talk Discussion Forum

Re: Looking for hydraulic advice

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Author  [Modern View]

12-03-2012 14:00:32

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Hmmm... Wouldn't it be wiser to gear the engine down some more? (I don't know, just asking)...

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12-03-2012 14:01:48

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 Re: Looking for hydraulic advice in reply to Chip812, 12-03-2012 14:00:32  
Don't think so, I ran it at a dead idle and it still moves too much fluid.

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J. Schwiebert

12-03-2012 14:48:04

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 Re: Looking for hydraulic advice in reply to Fawteen, 12-03-2012 14:01:48  
You need to remember when you restrict the flow you build pressure on the inlet side. Next thing you need to think about is when you lower the trailer do you want to be able to adjust the rate of drop. Me I would also gear it down more. Must be a Williams unit. J.

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12-03-2012 15:16:17

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 Re: Looking for hydraulic advice in reply to J. Schwiebert, 12-03-2012 14:48:04  
Yup on the Williams.

The integral valve is double-acting. Based on my limited knowledge of hydraulics, I'm thinking the it is an open center valve as the pump can idle with the valve in the center position. If that's the case, then pressure/heat problems will only surface during actual movement of the piston, IE long enough to raise and lower the bed.

Unless I'm missing something (and I probably am...) I don't see this as a problem.

I'm building this out of whatever I have laying around from years of being a packrat. If it were being purpose-built, I've used a shorter stroke cylinder and a smaller pump.

Not knowing what I was doing, I was worried about turning the pump fast enough. Obviously, that's not going to be a problem. I'll swap the smaller gear onto the engine and scrounge around and see what I can find for a larger gear for the pump.

I also have a friend digging through his stash thinking he may have a flow control valve somewhere.

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