Hose sizing

[IceHole]

Have a AGT bush hog for a ~21gpm skid steer.

It make sense to use the 1/2" lines it came with?

Info in my hydraulics book says 3/4" is the proper size.

I priced new lines and it'll be near $300, so not exactly cheap.

 

[cfherrman]

What pressure?

I would guess you need 3/4

 

[terex herder]

What is the flow rating for the motor on the bush hog? Manufacturer may be just cheaping out, or may be intentionally using smaller hoses to limit flow. I doubt if you will see much change in performance between 1/2 and 3/4 hose size.

 

[Diesel Dave]

What size are the auxiliary tubes on the skid steer ?

 

[IceHole]

What pressure?

I would guess you need 3/4

Maybe 500 psi

 

[IceHole]

What is the flow rating for the motor on the bush hog? Manufacturer may be just cheaping out, or may be intentionally using smaller hoses to limit flow. I doubt if you will see much change in performance between 1/2 and 3/4 hose size.

18-22 gpm

 

[HarleyHappy]

1/2” would be fine or go 5/8” but anytime you get over 1/2” price doubles.
I usually make 1/2” hoses for 20 to 25 GPM.

 

[Joe H]

Discounthydraulichose.com is a good source if you know what you want.

Joe H

 

[IceHole]

1/2” would be fine or go 5/8” but anytime you get over 1/2” price doubles.
I usually make 1/2” hoses for 20 to 25 GPM.

Price isn't much different between 1/2 and 3/4. Just the 1/2" is already there on the mower, so its cost is zero.

Just seems small per the charts I have.

 

[IceHole]

Discounthydraulichose.com is a good source if you know what you want.

Joe H

Yeah, been using them for a few years. Seems like shipping went up, but I may be misremembering.

 

[terex herder]

Better check your book. I'd guess pressure is 3000+. 20 gpm at 500 psi is less than 7 horsepower. Not even a good pushmower.

 

[IceHole]

Pressure isn't part of the equation. Just flow.

Better check your book. I'd guess pressure is 3000+. 20 gpm at 500 psi is less than 7 horsepower. Not even a good pushmower.

 

[terex herder]

Pressure isn't part of the hose size equation, but it is an important part of the cost of the hose you buy. Single braids need not apply. Double braids may be iffy depending on your skidder.

 

[IceHole]

Pressure isn't part of the hose size equation, but it is an important part of the cost of the hose you buy. Single braids need not apply. Double braids may be iffy depending on your skidder.

It's on a skid steer, not a skidder.

 

[Welder Dave]

If your aux. lines on the skid steer are 1/2" and the lines on the mower are 1/2" why is it even a question? You wouldn't gain anything going to 3/4" hoses if the skid steer lines are only 1/2". A high flow machine would likely have 5/8" or 3/4" lines.

 

[Joe H]

Shipping on everything has gone up, except sea freight went down.

And service went down as the price went up. Fedex is a joke, good luck with anything coming through them.

Joe H

 

[willie59]

Without getting into all the math involved in flow/pressure, resistance, what size are the fittings on the motor of the attachment? If they're -8 (1/2"), go with 1/2" hoses and fittings. If they're -10 (5/8"), then go with 5/8" hoses/fittings. I mean, if the motor fitting threads are 1/2", sure, you could use -16 (1") hoses, but what's the point of doing that when those hoses would be sending oil through 1/2" ports?

 

[IceHole]

Pressure isn't part of the hose size equation, but it is an important part of the cost of the hose you buy. Single braids need not apply. Double braids may be iffy depending on your

Yes, but question was on size, not hose type. I use 100R16 or 17 usually for all purpose hose. It's a 3-4k psi hose depending on which.

There's better, but start going from like $3-4 a ft to 10-15

 

[IceHole]

Without getting into all the math involved in flow/pressure, resistance, what size are the fittings on the motor of the attachment? If they're -8 (1/2"), go with 1/2" hoses and fittings. If they're -10 (5/8"), then go with 5/8" hoses/fittings. I mean, if the motor fitting threads are 1/2", sure, you could use -16 (1") hoses, but what's the point of doing that when those hoses would be sending oil through 1/2" ports?

-10, but 5/8" stuff is same or more than 3/4", so no reason to not use 3/4". Maybe cause it's not as common, dunno?

A neck down of a fitting is minor compared to 12+ ft of "necked down"

Ie using 3/4" hose on a 1/2" inlet/outlet would flow much better than it all 1/2"

 

[IceHole]

If your aux. lines on the skid steer are 1/2" and the lines on the mower are 1/2" why is it even a question? You wouldn't gain anything going to 3/4" hoses if the skid steer lines are only 1/2". A high flow machine would likely have 5/8" or 3/4" lines.

They are either 5/8 or 3/4", I forget and I'm 800 miles away to check.

Same setup is used whether it's standard flow (21gpm) or high flow (31gpm)