I want to use my tractor (3320 with 300cx loader and 375 hoe) to power a hydraulic pruning tool. These pruning tools (ADI or Fairmont) can be open centered or closed centered. Not sure what that means. Do I need open or closed? What do I need for my 3320? Where/how would I hook up to the tractor?
hyraulic pruning tool on 3320
- Thread starter jdjllee
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Dutch445
Elite Member
your 3320 is an open center system, that means
the attachment must be set up for open center.
many items, woodsplitters etc, have a valve that
can be changed easily between open and closed
by changing a pipe plug etc.
as far as hooking up to the tractor, will the
pruner have it's own control? if so, then i would
imagine the power beyond system would be best,
which is a continuous flow of pressurized oil.
a lot of folks use a scv also, and hold it open
with a bungee, but there is some restriction there
although in this application I doubt it will be a bother.
make sure the pruner is rated for the tractor hydraulic
sytem for pressure and flow etc.
the attachment must be set up for open center.
many items, woodsplitters etc, have a valve that
can be changed easily between open and closed
by changing a pipe plug etc.
as far as hooking up to the tractor, will the
pruner have it's own control? if so, then i would
imagine the power beyond system would be best,
which is a continuous flow of pressurized oil.
a lot of folks use a scv also, and hold it open
with a bungee, but there is some restriction there
although in this application I doubt it will be a bother.
make sure the pruner is rated for the tractor hydraulic
sytem for pressure and flow etc.
thanks, the pruners are rated 2,000 psi. Don't know what my tractor pressure is. the pruners have a finger operated trigger. I assume the fluid just flows in a loop until you pull the trigger.
AP LOPPERS
AP LOPPERS
kennyd
Advertiser
Your machine is rated for about 2500 PSI, but the pruners should handle that fine. And to confirm you need Open Center
But there is a little problem I saw in the specs:
The max flow is 5 GPM, and your tractor will flow 8.6 GPM-so the valve in the prunner will be a choking point and the fluid and valve could overheat.
But there is a little problem I saw in the specs:
The max flow is 5 GPM, and your tractor will flow 8.6 GPM-so the valve in the prunner will be a choking point and the fluid and valve could overheat.
Thanks, I think the 8.6 GPM would be at rated tractor engine speed say 2600 RPM so if I were to run around 1500 I'd probably be close to the 5 gpm. I think adequate pressure would still be there at the lower engine speed. But I see your point. If I had a problem with pressure or flow I think I could probably rig up an external bypass/regulator of some sort. I think these limb loppers woud be pretty handy. Not cheap though, so if I can take advantage of my tractor hydraulics I can cut out having to have a dedicated hydraulic power supply and give my tractor another job to do.
kennyd
Advertiser
Yes, lowering the RPM will decrease flow...but the pressure will stay the same.
Now for hookup, there are three options:
-The Power Beyond kit that Dutch suggested is good, it supplies a constant flow of oil whenever the tractor is running. About $300
-The 3rd SCV kit and the bungee cord. This may be also useful for other things for you as well. About $250
-You could unplug the two hoses going to your dump/curl cylinders on your loader (if you have one) and bungee the joystick over. Almost free
Now for hookup, there are three options:
-The Power Beyond kit that Dutch suggested is good, it supplies a constant flow of oil whenever the tractor is running. About $300
-The 3rd SCV kit and the bungee cord. This may be also useful for other things for you as well. About $250
-You could unplug the two hoses going to your dump/curl cylinders on your loader (if you have one) and bungee the joystick over. Almost free
Willl
Elite Member
Does your hoe use the tractor power beyond to power it ?
If so, you could tap into it there.
If so, you could tap into it there.
Willl
Elite Member
Wow, that place has some wicked trimming machines. :shocked:
kennyd
Advertiser
Good catch Will, I missed that he had the 'hoe-so yes he would already have the PB setup.
My tractor has the power beyond because I have the 375 hoe but I don't want to remove or disconnect the hoe hydraulics to go lopping. It's too cold out right now for me to look see if there are any auxilliary connections available off the power beyond. If not, maybe I can add some. 3rd SCV might be a good option.
.
.
kennyd
Advertiser
There is no "aux connections off of the PB lines"...
Willl
Elite Member
Suppose he could go between hoe and tractor in the PB circuit with another SV, no ?
Willl
Elite Member
You wouldn't have to. Could be easily set up with some QCs.
J_J
Super Star Member
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jdjllee,
I have about 5 of those hyd limb cutters that were used by the electric crews to maintain their lines. Mine are closed center. I also have the hyd backpack hyd pump and the hyd chainsaw, and a hyd pruner pole with a 10 in bld. Even though mine is closed center, I was thinking of using a solenoid to operate the hyd.
Just put some QD's in your curl circuit, and plug in there. You could install an additional relief valve for the pole pruner if necessary.
I have about 5 of those hyd limb cutters that were used by the electric crews to maintain their lines. Mine are closed center. I also have the hyd backpack hyd pump and the hyd chainsaw, and a hyd pruner pole with a 10 in bld. Even though mine is closed center, I was thinking of using a solenoid to operate the hyd.
Just put some QD's in your curl circuit, and plug in there. You could install an additional relief valve for the pole pruner if necessary.
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kennyd
Advertiser
Yes, that would work also...but due to the small size of the valve on the pruner it may not be a good idea. The 3rd SCV I think may be best.
AKfish
Super Member
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- JD 5115M; JD 110 TLB; JD 4720; Ford 9N; JD X300R
Those are some impressive tools! Never imagined that a hydraulic powered unit was available... (shows what I know!).
I didn't look at all the pictures but the ones I did review looked to be closed circuit. At least, that's what I'd expect them to be - given that there's not a 2nd return line - only one hyd line from the tractor, etc. to the pruner.
AKfish
I didn't look at all the pictures but the ones I did review looked to be closed circuit. At least, that's what I'd expect them to be - given that there's not a 2nd return line - only one hyd line from the tractor, etc. to the pruner.
AKfish
J_J
Super Star Member
- Joined
- Sep 6, 2003
- Messages
- 18,973
- Location
- JACKSONVILLE, FL
- Tractor
- Power-Trac 1445, KUBOTA B-9200HST
That particular pruner will take up to 9 GPM.
My backpack hyd pump and pruners are in storage right now. . I plan to check them out and put them on Ebay or Craigslist in the near future. The psi limit on that pruner is 2000. So if the pruner is set up for open center, you could plug it in your curl circuit or another circuit.
They also make a pole mounted hyd chainsaw, and a 10 in circular blade with carbide teeth.
The pruners cut pretty well on live wood, about 2.5 in, but on dead wood, it is sometimes difficult. The hyd chainsaw works better in those situations.
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