Wheel loader pairing up with lightweight forestry mulcher, can it work ?.

[Arkan]

Hello everyone .Until my acc was activated i have been reading other peoples post here in hope to search something that could help me,and i did,but not much honestly.It would mean allot if someone can help me out for this situation i have ,well of my friend ,but since we work together ,use machines (i am farmer),it's more or less same.
So ,as name of the thread say,he owns wheel loader,not tractor ,but industrial loader ,15 tons weight ,bucket with teeth for loading dirt,gravel,whatever.We both have in plan to equip that loader with pto tractor powered lightweight forestry mulcher (tractor pto powered,because there is many used ones for cheaper price,than hydraulic operated ones,which are very rare in my country),and lightweight because honestly neither he nor i will have anything thicker than 1 or 2 inches max at ground level to mulch,moustly we will use it for mulching high bushes,which are very thick ,many branches ,but nothing thicker than as i say 1 inch in 99% situations,so pretty easy work,but because those bushes are high ,4-5 meters ,loader with mulcher in front instead of bucket would do awesome work at first mulching higher spots ,then lower ones.Honestly if tractor would try to mulch something that high ,idk ,it would be hard,i mean mulcher connected on tractor at the back of machine on 3 point,powered by pto.
So anyway,i am sorry i like to explain better what i need so peoples understand easily,i guess it's time for numbers now,and where our real problem is.
Loader have 3 hydraulic pumps,but only important one is main one ,it's gear type and can deliver max flow of 260 liter per minute(70 gallons) ,but at only 140-160 bar of pressure(2100-2300psi),also displacement of pump is i think 133 cubic centimeters (8.1 cubic inch).
We trying to figure out how to pair that pump with hydraulic motor,which one ,size ,type ?.Those tractor pto powered mulchers,they all need +- 450-550 rpm at pto(it can be low as 300 in our case) ,so that would be our starting point i guess,hydraulic motor should have that speed,or idk ,maybe it can be adjusted ?,we try to avoid oil heating as much as possible.Also,since we don't need high speed of hydraulic motor ,i checked on net ,highest torque hydro motors are piston radial types ,could that be best option for us ?,to pull max power out of that loader pump ?.He found one motor of that type for sale used one ,it's piston radial,150 cc ,guy that sells it say it's max rpm is 500.

Well,i guess this is more or less everything,i am sorry for small novel above ,i hope someone can helps us out.

 

[Industrial Toys]

It would have been interesting to mention the make and model of loader.

You need to be aware of heat. You don't want to fry the EXPENSIVE drive train of the loader. HEAT is a number one killer. Another issue to consider is whether the machine can be operated (continuously) at slow speed with high engine RPMs.

A friend of mine does stuff like this all the time and it's amazing how many flow gauges and equipment is required to figure all this stuff out before you make a big mistake.

 

[crashz]

I agree. That whole system is designed to run the main hydraulics of the loader, filling large cylinders relatively quickly. But that is intermittent and each cylinder is a huge heat sink. The motor will be continuous and will heat up the system quickly.

I would either use an auxiliary pump on the loader or add a belt drive pump and separate reservoir. Having a separate system will isolate the loader hydraulics, reducing the risk of damaging the loader and if a line breaks, the loader is completely un-affected.

 

[Arkan]

Loader is old type 1990 year produced,i am from Europe,Serbia.He does not have hydraulic drive if u mean on that,he use this transmission zf 4pw 45h1.We are not planning to use it for professional work,few acres now and then,nothing special.He plans to add hydraulic oil cooler,either oil-water type or oil air type ,he will see what's better.

 

[Rustyiron]

Is that picture the actual machine? If it's close to that size, I might approach it in the way wheel loaders and snow blowing is handled - with and auxiliary motor and pto/clutch. This would remove all guesswork as far as damaging the loader in any way by tapping into its hydraulic system that as the other guys have mentioned was not intended to be a hydraulic power plant for auxiliary attachments beyond possibly a pair of cylinders on a "4 in 1" bucket.
That's definitely enough machine to carry this arrangement easily. There are companies here in the United States that sell pto/clutch units that have standard bellhousing bolt patterns for 540 or 1000 (or both) rpms. I can look for a link if you like.

 

[Rustyiron]

Here's what it looks like.
FARM SHOW Magazine - The BEST stories about Made-It-Myself Shop Inventions, Farming and Gardening Tips, Time-saving Tricks & the Best Farm Shop Hacks, DIY Farm Projects, Tips on Boosting your farm income, time-saving farming advice, farming tractors

 

[Industrial Toys]

It's also not exactly an off the beaten path machine. Mostly suited for hard level ground.

 

[Xfaxman]

Does the wheel loader have a quick coupler for the bucket?

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[Arkan]

@Rustyiron Yes it's exact machine ,only friend loader have Cummins engine ,195-200hp,that on picture is 160hp engine.I not understand u very well,u mean maybe something like this ?.engine ,actual engine in front to power that mulcher with its own pump and hydro motor ?.
Wheel Loader | Tiger Mowers

@IndustrialToys We not have hills here ,everything is flat ,but i forgot to mention,loader would clear mainly farming fields ,that were not used for over decade and they grown in that wild bushes.So no hard ground for him,plus it have chains for tires ,not snow chains ,but those chains like we see when loaders are working near smelting furnaces or idk how to explain,they cover tire almost completely,protect it from anything.

Btw loader is lifting +-6 tons easily ,we lifted whole tractor with it,and maximum lifting capacity is 14 tons,ofc no point trying lifting that it would just lift his rear end.I see on net many smaller loaders with similar operations ,no extra engine ,just their own hydraulics,we would not allow ofc for hydraulic oil to overheat.Oil coolant is a must,but mainly more or less for our own needs,we try not to invest allot of money,u wouldn't believe how much this loader was cost,just to buy tractor mulcher and some hydraulic motor(both used ,not new) ,it would be maybe even expensive as much as whole loader.
We planned to buy just some hydro motor and mulcher,with that price invested,if we just mulched what we have for us ,it would pay off it self easily.Because companies that are doing this type of job ,are just far tooo much expensive here,we called several of them ,and prices are moustly same,expensive.
Anyway if it can't work,loader was only something as idea,due to his lifting boom it would really make job much easier ,well we can still use tractor ,but just as i mention before,those bushes are very high,and branches are mixed up somehow,it's all connected,hard to mulch it from ground level.

@Xfaxman Yes,but it's not mounted on him,we didn't have use for it,we use just one bucket with teeth on it in V shape.

 

[Rustyiron]

@Rustyiron Yes it's exact machine ,only friend loader have Cummins engine ,195-200hp,that on picture is 160hp engine.I not understand u very well,u mean maybe something like this ?.engine ,actual engine in front to power that mulcher with its own pump and hydro motor ?.
Wheel Loader | Tiger Mowers

Yes, another engine but mechanical not hydraulic pump/motor.
But your link shows a self contained engine driving a hydraulic pump powering the arm mower. I am thinking a "mechanically" (pto) driven shaft to your modified 3 point mulcher from an additional motor all mounted in some frame that was either pinned on in place OF the bucket or if you had a "fast mount" such as Xfaxman pictured.

This picture is as close as I can find. I think the approximate size of this road milling attachment would be very similar to a tractor driven mulcher and a motor to drive it. If you have not seen a road milling machine, it's very similar to a forestry mulcher in the action of the cutting.