HYDRAULIC CHAIN SAW
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MossRoad
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A lot of tree trimming companies have hydraulic chain saws and pole pruners. Especially the ones with bucket trucks. You might want to look at supply houses geared towards arborists, tree trimmers, etc...
Hydraulic Chainsaws, Circular Saws, Limb Loppers & Pruners
Hydraulic Chainsaws, Circular Saws, Limb Loppers & Pruners
MossRoad
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Oh yeah... hydraulic pruners can be non conductive, making them safer for use around power lines, etc... That's why they use them in bucket trucks.
OK guys ... back to my original question. Has anyone succeeded in matching up one of these with the hydraulics on a PT? If so what's the fittings and pressure issues? Also if buying used how about the potential of contaminating hydraulic fluid?
KentT
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The PT-422's and 425's hydraulic PTO is rated at 8 GPM at 2500 PSI. The PT-1430's is rated at 12 GPM at 2500 PSI.
Keep in mind that this is a closed loop PTO with no internal bypass or diverter valve -- it is simply on and off with no flow control other than by using the throttle, once it is turned on.
Any attachment like a chainsaw where you'd want to control the speed on the attachment itself (trigger, etc.) and not on the dashboard of the tractor (throttle, PTO on/off switch) would require its own bypass (open center valve, for example) or diverter valve to allow the flow to continue when the attachment is not in use or at less than full speed.
Keep in mind that this is a closed loop PTO with no internal bypass or diverter valve -- it is simply on and off with no flow control other than by using the throttle, once it is turned on.
Any attachment like a chainsaw where you'd want to control the speed on the attachment itself (trigger, etc.) and not on the dashboard of the tractor (throttle, PTO on/off switch) would require its own bypass (open center valve, for example) or diverter valve to allow the flow to continue when the attachment is not in use or at less than full speed.
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BillCroasmun
Gold Member
Although chainsaws have a variable speed trigger in my personal experience my saws are either idling (non-cutting) or I am full throttle (cutting). The only reason for an idle setting for me is so you do not have to restart the gas engine b/w every cut.KentT said:
I think a hydraulic powered saw would be OK to have turn all off or turn all on. Then again maybe I don't saw properly.
Not to get too far off topic but I had another thread where I talked about converting a small electric chainsaw into a pole saw for the PT but my power invertor isn't beefy enough. My dad just got a big invertor ($150 price range) that he's been using with a Black and Decker Alligator Lopper pretty successfully. Alligator Lopper: Electric Lopper from Black and Decker
KentT
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BillCroasmun said:Although chainsaws have a variable speed trigger in my personal experience my saws are either idling (non-cutting) or I am full throttle (cutting). The only reason for an idle setting for me is so you do not have to restart the gas engine b/w every cut.
I think a hydraulic powered saw would be OK to have turn all off or turn all on. Then again maybe I don't saw properly.
Not to get too far off topic but I had another thread where I talked about converting a small electric chainsaw into a pole saw for the PT but my power invertor isn't beefy enough. My dad just got a big invertor ($150 price range) that he's been using with a Black and Decker Alligator Lopper pretty successfully. Alligator Lopper: Electric Lopper from Black and Decker
IMO, the biggest reason is safety -- both my gas chainsaws (Stihl & Husqy) have automatic chain brakes/clutches that stop the chain from running when the saw is idling -- in addition to the kickback protection that stops it in an "emergency." I certainly wouldn't want the chain to always be running "wide open" especially as I tried to maneuver a saw with hydraulic hoses attached to it...
MossRoad
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Click on that link I gave above. There are diagrams of the spool for the hydualic chainsaw, loppers and circular saw. They can be run in an open center or closed center loop by adding a plub. They have a trigger on the spool. So they can be switched on and off like a normal chainsaw.
SpringHollow
Elite Member
other than for a tree surgeon working from a boom, i still do not understand why one would even want to do this - seems like a lot of wear and tera on the tractor engine and awkward to use.
Ken
Ken
MossRoad
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Some of us want to eliminate as many motors to maintain as possible.