Hydraulic Flow Rate Chart

[bernhardine]

Would 1/2" be better? No, not really as you'll never have enough flow to out do the capable volume of the line.

Well, you can do it with a 1/4", it'll work, but it doesn't make sense.

At first, the backpressure that the lines/hoses build up by itself shouldn't be higher than the backpressure the Tool/device with no load (!) builds up.

Second, the velocity of the fluid in (the most) tractor systems should not exceed 4,5 m/s (15 ft/s). - If it is faster, the pressure loss is to high and the temperature rises quick and gets to high.

Look at that diagram in post No.2. It's a standard one and most important in this question. - Draw a straight line line from the left to the wanted velocity on the right. In the middle you get the Line-dia.

Let's say, there are, realistic, 4GPM (engine rpm 80%) and the fluid velocity should be in the middle of the range at 4 m/s (less would be better). In that case the Lines should be at least 8.4 mm .

 

[NHSleddog]

The front remotes on my B2650 are 1/4" soft and hard lines with connectors and couplings, a 90deg and a 45. plus the length. They are already on the tractor, Kubota OEM installed by the dealer.

Is the 1/4" as configured capable of delivering 5GPM? All the charts I can find, say it isn't.

Would I be better off just going directly to it with 3/8"?

 

[bernhardine]

The front remotes on my B2650 are 1/4" soft and hard lines with connectors and couplings, a 90deg and a 45. plus the length. They are already on the tractor, Kubota OEM installed by the dealer.

To move a cylinder from time to time, it's ok.

Is the 1/4" as configured capable of delivering 5GPM? All the charts I can find, say it isn't.

As far as these 5 GPM should flow constantly, the charts you found are correct. The 1/4 lines are too small for that!

Would I be better off just going directly to it with 3/8"?

Yes, absolutely

 

[North Idaho Wolfman]

The front remotes on my B2650 are 1/4" soft and hard lines with connectors and couplings, a 90deg and a 45. plus the length. They are already on the tractor, Kubota OEM installed by the dealer.

Is the 1/4" as configured capable of delivering 5GPM? All the charts I can find, say it isn't.

Would I be better off just going directly to it with 3/8"?

Where and what are you going to use to run it?
If it's a third function valve, what size ports does it have, betting 1/4" or less, not a good choice for your use.

You would be much better off getting a dedicated motor control valve that has the ability to handle higher flows.
Then tap that into the main hydraulic flow.

 

[NHSleddog]

Where and what are you going to use to run it?
If it's a third function valve, what size ports does it have, betting 1/4" or less, not a good choice for your use.

You would be much better off getting a dedicated motor control valve that has the ability to handle higher flows.
Then tap that into the main hydraulic flow.

SMH - I am going to be running an auger mounted to a QA plate on the front using the Kubota 3rd function circuit.

My dealer said I should be able to expect up to 5GPM from it. Based on the hose restrictions, I do not see how. Coming off the valve is 3/8" up to the 1/4" rigid.

My plan at this point is to go right from the valve to the auger using 3/8" and bypass the 1/4" rigid and all the fittings.

I am not sure what you mean by a motor control valve, I have only seen them run on the front remotes.

 

[Mondo]

If your interested I have a US Army Hydraulics Manual. Its a pretty extensive manual that a member on a different site offered. If interested just shoot me an E-Mail.

 

[NHSleddog]

If your interested I have a US Army Hydraulics Manual. Its a pretty extensive manual that a member on a different site offered. If interested just shoot me an E-Mail.

LOL - Thank you for the offer. I really didn't want to get that far into it. I figured it was an easy question but it turns out it isn't.

 

[dochsml]

LOL - Thank you for the offer. I really didn't want to get that far into it. I figured it was an easy question but it turns out it isn't.

I asked a similar question (not on this forum) before I got a Lane Shark for my FEL and got similar responses. I think short of putting a flow meter inline, you won’t get the answer you are wanting. I decided to stick with the “trust us it will work” answer. Ignorance is bliss and I’m clearing lanes.

 

[GreensvilleJay]

hmm ... 'auger'..... as in drilling holes into the ground ? If so, simply look at commercially sold complete units, see what hoses and specs they have. City did '3" core sampling' on road using a 5HP Honda engine powered towbehind. If you're drilling 16" holes for post, you'll NEED a lot of flow, which implies larger hoses. grain 'augers' tend to be 'light ' duty. The 'system' has to be designed around what it is going to be used for.
More information is required though...