I have been playing with my DuAl loader, getting the air out of the system, so I could control the lowering stage. After draining the entire system, of aireated oil ( foamy), I refilled it with ATF, and pumped that out the extreme ends of the hoses, and cylinders, and now have only red oil, when bleeding. The bucket now stops falling, when the control lever is released, and holds properly. I would like to restrict the flow, when lowering the bucket, so it drops slower in the lowering position. I see that Northern tool, has a flow restrictor that is adjustable, but wants $109.00 for it. That seems excessive to me, when I think that a smaller bored fitting, should do the job. Am I dreaming? or is there offered something like that, for flow restriction? I use the loader quite a bit as a hoisting tool, and need to be able to trust it, when easeing something down.
- Thread starter RalphWD45
- Start date
You need something that will allow full flow one direction,restricted flow the oppisite.It will have a little 'poppet' in side. Any good hydralic shop will have one.It should be around 20/25 dollars.However,You just need to 'practice' lowering the loader slowly by just 'cracking' the valve.Steady your hand and squeeze slowly. Kind of like squeezeing a trigger.
Steve@Advance
Well-known Member
In order to control the down speed and still have the same up speed, you'll need a "directional flow control valve". It has a check valve inside that allows free flow in one direction, and adjustable metered flow in the other. You'll want to meter the oil as it is coming out of the cylinder you are controlling.
Check with some of the hydraulic surplus stores in the internet, they might beat the price. But be sure to properly size and pressure rate it, not a place to take short cuts!
Check with some of the hydraulic surplus stores in the internet, they might beat the price. But be sure to properly size and pressure rate it, not a place to take short cuts!
J. Schwiebert
Well-known Member
Get an adjustable flow control. Many needle valve will have free flow in one direction and adjustable restricted flow in the other direction. Then adjust the return flow to a smooth lower which will be determine by the load in the bucket. That is why you want an adjustable flow control heavy load turn the needle valve in. a bucket of feathers light load you can turn it out some. Go to a hydraulic house or a good truck equipment shop.
Delta Red! That is what I already do! I call it feathering the control. My loader is double action and the up side works fine. Actually the down side works like it is supposed to, but the fall rate, even empty, is too fast to suit me, for something like dropping a rail tie in a post hole, or lowering a piece of machinery on to a trailer. I want better control, and I guess I am going to have to spring for an adjustable flow control valve. Going to check out Surplus Center and see what they have!
Traditional Farmer
Well-known Member
- Location
- Virginia
Surplus Center has several flow control valves reasonable
Owen Aaland
Well-known Member
Here is one made by Gresen. It allows free flow in one direction and restricts the flow through the small orifice in the other direction.
I have made many drop control orfices from a chunk of a bar or bolt. Only thing is you have to have a nice flat surface at loader cyl or valve end so it will seal . Make small hole in like a quarter inch long piece, wide slot across one side of it so fluid had to go through hole when lowering but lifts plate and goes through slot on other side when raising. IH actually used them in some valves so I just copied. Lot of old combine headers and swather headers dropped like a rock is where I made them for. Have to adjust size of hole to get drop you are comfortable with. Another thing, some of the header control valves on the 715 IH combines were mismanufactured. They had a screw on them to control the rate of drop, but if you turned it in far enough to start slowing the drop it shut off the drop completely. If under warranty, changed the valve, if out of warranty, made an orfice.
I really like the one that Owen Ashland pictured! It is a gresen control valve, on my loader, and should be compatible, with the gresen flow restrictor. Was thinking of using a brass gate valve, being as it is on low pressure lines, but the pictured flow restrictor, looks more compact, and should work well, for my application. THANKS,ALL YOU GUYS, FOR YOUR EFFORTS!
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