Continuous running hydraulic attachements

[Stonecreekranch]

Will continuously running hydraulic attachements "burn up" your hydraulic pump, or otherwise damage your tractor? I was told that my JD 50-series tractor would not run a hydraulically powered shredder because "tractor pumps just aren't made to run all of the time" like pumps on skid loaders.

What say ye, experts?

 

[Anonymous-0]

Yeah, it will run small application motors like planter air pumps, but a shredder would require way to much volume of oil. An auxiliary PTO driven pump would be in order.

 

[RobMD]

It's not that they aren't durable enough, it's the fact that GPM is low, the reservior capacity is low, and the ability to cool the oil is non-existent.

 

[Stonecreek]

An auxiliary PTO hydraulic pump? That had not occured to me! Can you point me to where such an animal might be purchased?

The reason for my interest is that an acquaintance may be considering purchasing a front-mounted shredder for his skid loader and he and I might exchange the use of it and my front-mounted tree shear.

 

[Anonymous-0]

check with any of the supply houses for tractors, or your local dealer, they should be able to point you to auxiliary pumps. Many tractors are set up to allow a shaft to go below the radiator to bolt to the crank shaft pully, and mount the pump somewhere on the front bumper or lower bolster. Many older front end loaders use such an arrangement, with a reservoir located somewhere along the loader frame. Some tractors have a mid-mount PTO shaft underneath that can be adapted. Other choice is a pump mounted on the rear PTO shaft. Would be easy to install and remove.
But the problem you need to consider is how much power you need. Hydraulic powered shredders take a lot of HP, and the oil will need some sort of cooler rigged into the system. There's a reason why you don't see this type of set up on a farm tractor, it's a fuel hog and a lot of trouble.

 

[Anonymous-0]

First thing here, what does the manufacture say the imput should be in GPM & PSI. Also your Deere is closed center and most likely the loader is open center.

 

[buickanddeere]

Where are you guys coming from?
The new Generation JD's and later are noted for having durable hydraulics with plenty of capacity.
Now what happens sometimes is a tinkerer on the cheap tries to connect a high demand hydraulic load through the scv's. You can't pull and return 15-30gpm through a system which maxes out at around 12gpm if they did happen to find the flow control and dial it to max.
Mention a hydraulic "Power Beyond" circuit and a "Ported Filter Cover" and most tinkerers think you are talking about the new Star Trek movie.
What pump is in what model of tractor. i have the radial hydraulic pump here and tell you the rated gpm's.

 

[c.seydel]

check out northerntool.com, saw a 22 gpm pump. I would find an oil cooler too, heat is bad.

 

[LarrySTN]

First off what 50 series do you have. Many of the JD 50 series have at least a 23 GPM pump. Deeres pumps have been very durable and will meet or excede the life expectantcy of the "real" pumps in skid loaders and such. I run an all hydraulic silage table with my 2750's hydraulics for hours on end. What you need to do is check the hydraulic requirments of the chipper and compare to what you tractor has available.

 

[jddriver]

tinkerer is code for engineer

 

[Tx Jim]

buickanddeere
Have you ever run an orbit motor on your New Generation JD?

I tried it on a JD 4240 pulling a Vermeer R23 hay rake plugged into the SCV as shown in operators manual. After 4 hrs raking one could not un-plug hyd hoses without gloves because hoses were so "HOT"!!!!!!!!!!!! How can this be good for the hyd system????????

Before you ask radiator and oil cooler were clean not caked with oily dirt.

 

[buickanddeere]

160F hydraulic return oil is nothing to panic about and yes you will have to wear gloves.Perfectly normal.
Oil and seal breakdown doesn't start until 225F and doesn't become serious until 240F.
The other problem is all the back pressure and turbulence that using the scv's cause. Of course there is extra heating.
If nothing else if you had returned the oil with a 3/4inch hose and coupler directly back to a ported filter cover. Much of the heating and front pump cavitation/heating would have been avoided.
The transmission pumps are not sized to keep up with the front pump on a continuous basis unless a ported filter cover is used.

 

[DONMYEIL]

normal oil temp is 100* above outside temp. very hot without gloves.

 

[Tx Jim]

buickanddeere,
IF you didn't insert a thermometer in my oil how do yo know it was at 160F ???????????

 

[buickanddeere]

That's about the temp where most people would try for about a second to connect or disconnect the hoses. They would then have to give up and go find a pair of gloves.