Track loader powered brush hog

Paul Buhler · Post by **Paul Buhler** » Sun Jan 19, 2014 7:52 pm

Found this and thought of your project.

http://burlington.craigslist.org/grq/4294987911.html

jhubert · Post by **jhubert** » Mon Jan 20, 2014 10:29 am

DrLoch wrote:That is the way to do it.... 75 HP.... There's that physics thing again

They mean the gearbox will handle up to 75hp. Not that you need that much to run it. I still dont know why some manufacturers use that 90 degree gearbox when you can mount the hyd motor vertically and eliminate that part altogether. Seems an easy way to cut 200-300$ out of the cost of building it.

Anyone have experience with Salami stackable gear pumps? Or baileys hydraulic website? Someone offered up the idea here of this and it appears they have outputs right in my ballpark in terms of max rpm of 3000, 3000 psi sustained rating, 26gpm. The first stage would be plumbed up just like the factory and the second stage would be hooked to an aux tank/cooler with 12v fan. Sounds like I need to plug some formulas. Maybe take my pump off (kinda whiney, even when warm) and have it bench tested by my local hyd prof. Atleast get an idea what its running on since dealers cant even agree on year of manufacture....let alone give me a straight gpm at ___rpms figure.

Also these pumps are billet alum and run around 300$. I think a reman deere for my loader that was on ebay was listed at 1300$ rebuild mine and throw it up there. Maybe cover some of the cost or just keep it incase this explodes in my face.

DrLoch · Post by **DrLoch** » Mon Jan 20, 2014 1:09 pm

I fully understand what they meant by the 75 HP. Regardless, when you get that brush hog loaded up you'll really find out how much ass your loader motor has. Just remember when it stalls out you need to get it started again as quickly as possible and run it unloaded for a minute or so.

I've got experience with multiple gear, vane and piston pumps. Also can direct you to who would have what you need.

I believe that you would do well to have someone run your current pump on a stand. I can back calc flows from your test data. Would need RPM and flow observed at that RPM.

jhubert · Post by **jhubert** » Mon Jan 20, 2014 2:05 pm

Awesome. Ill get that pump off this weekend. Ive noticed in youtube videos all the skids seem to nibble at the brush from the edge...dive in a bit and back out and so on. I would do the same as I dont care how fast it gets done. Dont you think have a super heavy rotating mass would help that? like say 400lbs?

Post by **Lavoy** » Mon Jan 20, 2014 3:08 pm

Because running the blades directly on the motor will result in catastrophic motor failure shortly after you hit the first tree, they are not designed to stand that kind of impact loading.
Not sure what kind of gear box you are looking at, but doubt you will find anything new that will take that kind of abuse for $300, I would guess somewhere past double or triple that. Then you will have to find or make a blade mount to bolt to the gearbox output shaft.
In one of my posts, I told you what the output of your loader is, 31GPM, 2,600.
You can not spin a 5 or 6 foot diameter brush cutting blade at 3000RPM, period. I highly doubt they spin much past PTO speed, but that can be calculated if you know tip speed of a given size mower, and work the calculations backwards to determine shaft speed.
Not sure what you mean by stages, but you will need both pressure and flow control in addition to something that will let the motor spool if you close the valve or flow control. That much momentum, direct shut off of flow equals big bang, lots of oil, parts and money down the drain if you are lucky enough not to kill yourself or someone else when it goes boom. Then after all of these parts are installed, then you plumb in the cooler.
Lavoy

jhubert · Post by **jhubert** » Mon Jan 20, 2014 3:58 pm

I meant if I went the stackable pump route the one I would select would have a max rpm of 3000 since my machine probly peaks at what 2600 maybe? And I got a figure online of 10,000 to 14,000 feet per min is a good tip speed for a heavy brush shredder. Now figure that into a 5' circle and you get something more down to earth....I figured it once and I believe it wasnt far off 700rpm. Even at that speed that thing will be humming! I got a good handle of rpm. Once in a while they let me play on the cnc lathe at work. But Im usually stuck in the milling department finishing mold cavities.

Quick calc: 5' cut equals 14,000fpm at 900rpm
6.0cu in/rev x 900rpm / 231= 25ish gpm required
2500psi x 6.0 /(2 x 3.14) puts me in 200ft lbs of torque
Now these are formulas I found online and I would love to hear opinions on their real life effectiveness from those that use this stuff regularly.

Post by **Lavoy** » Mon Jan 20, 2014 7:30 pm

I see what you mean. Not sure there is such a pump that will be a direct bolt in for your application, or even an easy retrofit, I wonder how much room there is in front of the existing pump to put in a longer one?
From what I found, rated power is 2100RPM, so high idle is probably in the 2300RPM range so 3000 RPM is more than adequate.
Lavoy

jhubert · Post by **jhubert** » Sun Jan 26, 2014 8:14 am

http://www.rockanddirt.com/equipment-fo ... m=37017355

Just what the doctor ordered. Anyone ever seen a machine outfitted like this one in person? Says the pto is hydraulic powered so I'm interested to find out how much power it puts out. Ill call and ask the dealer what they know about it. What's the chance JD made that assembly?

Post by **Lavoy** » Sun Jan 26, 2014 7:36 pm

No chance it is Deere, most likely is Lindex. Actually started by Jesse Lindeman in later years to make 3PT hitches for crawlers after the OEM's quit offering them.
Lavoy

jtrichard · Post by **jtrichard** » Sun Jan 26, 2014 9:36 pm

Lavoy there is a tag on it and it looks like it says Lindex co ....did they use the lower arms off of a 4 wheel drive skip? what would the wear/guide plates on the lower bars be for?

jhubert · Post by **jhubert** » Mon Jan 27, 2014 11:40 am

Just spoke with salesman. Said its the first one hes ever seen and the pto IS hydraulically driven and that its a 540 style shaft. If it had a blade on it he said they would definitely part with that unit off the back but its of no use without that on it. That stinks but its what I figured....

And he did confirm Lyndex manufactured.

jtrichard · Post by **jtrichard** » Mon Jan 27, 2014 11:49 am

i looked up lindex and they also made hydraulic drive PTOs so i would say it was a package deal

Post by **Lavoy** » Mon Jan 27, 2014 5:42 pm

Yes, now I see it, blew the pic up some and you can see the Lindex tag plain as day. Not sure what the rub plates are for, only guess is one arm is used on several applications, or arms have been switched.
Some place I have, or did have a pic of Jesse in later years standing behind a late model crawler in his shop looking at the 3PT hitch.
Lavoy

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