Go BottomLocation of PTO receiver on Implement
 | Kim Hartshorn
Join Date: Posts: 1 
|
1999-09-13 7926
I am making up a 3pt logging winch to be driven by the PTO. I am wondering if the PTO receiver should be positioned so that the shaft is horizontal in the position that the winch will be used at highest torque. This would be when the winch plate is in contact with the ground. This would result in a high angle when the winch is raised, when I will use it occasionally. Or... is it better to split the difference and have approximately the same shaft angle in low and high positions?Kim
Reply to |
Quote Reply |
Add PhotoLocation of PTO receiver on Implement
| Ted
Join Date: Posts: 1
|
1999-09-13 7936
I have one and it has a deep gear reduction from the pto, the input is 540rpm, the drum turns at 35rpm, a 15:1 reduction. ....
Reply to |
Quote Reply |
Add PhotoLocation of PTO receiver on Implement
| Keith
Join Date: Posts: 1
|
1999-09-13 7937
I really don't think that the position (angle) of the pto shaft has much affect on the ability of the tractor to deliver maximum torque to a 3pt implement. The u-joints on both ends of the pto shaft allow the lift to raise/lower at any pto speed. I think the limiting factor will be how much weight you can pull/lift from the 3pt lift with a given tractor. You definitely want the winch roller fairlead to be as low to the ground as you can get it while winching in a log at maximum speed, though. The obvious reason for this is that if the log hangs up, that should help avoid lifting the front of the tractor off the ground. I would think you want to design/build it such that the optimum working position is with the winch frame resting on the ground, or just above it. If it were me, I would only raise the winch to move the tractor from one place to another and not attempt to pull logs while the winch was raised much over a foot or so. But that's your call. BTW, what size cable are you planning to use? Will it have some sort of clutch built-in to it? How will you mount the spool relative to the pto shaft? Will it be offset to one side, or are you going to be able to center the spool so its center will be in line with the shaft?? What size trees do you expect to be able to winch up with it? Sorry for all the questions, but I like talking winches!! Good luck with it and post some pictures when you are done! ....
Reply to |
Quote Reply |
Add PhotoLocation of PTO receiver on Implement
| Kim Hartshorn
Join Date: Posts: 1
|
1999-09-13 7938
The winch I plan to make will use an old drum from a junk winch with a 2' circumfrence...the commercial 3pt logging winches seem to have a line speed of between 2 to 5 ft/sec. I've found some series 60 roller chain with a 44 tooth gear. I am hoping to gear down to at least 4/1 but ideally more like 9/1. To some extent I can control the speed with the rpms on the pto. I like the engine idling at about 1200 rpm anyway which will put the pto around 270 rpm...getting me into the right range on line speed. I plan on copying the commercial winches with a blade/barbed grapple that will brace the tractor against the pull and then hold the end of the log up for skidding. I plan on driving the drum through an old magnetic clutch I found for a front pto (I hope it will handle the torque)...If it works this will be nicer than the lanyard operated manual clutches I have seen, and it will still work as a "deadman's" switch. If the 12volt magnetic clutch works it will be simple to set up radio control! I will mount the drum below the clutch in line with the pto...no direction change in the drive chain, no worm (the clutch should allow freewheel) I havent quite worked out the brake, most of the logging winches I have seen simply cut teeth into the flange of the drum and use a pawl to prevent slipping. This drum has a nice secondary drum outside of one flange that perhaps could be used as a drum brake, which would be nice because then you could slip it backwards. I have a ton of 5/16th out of service cable that I am planning on using, the cable path will go up from the drum and over a sheave that will work as the fairlead for the drum (about 3' away should allow for cable dispersal on the drum I hope) The plan then is to have several points directly below the sheave to hook a snatch block....allowing to change the height of pull. (for instance the first pull will prolly be low but as it gets close to the tractor I want to be able to lift it on top of the grapple bar. Then I lift the log on the grapple bar with the hitch and off I go :-) I hope.I plan on skidding as big a tree as I can with this system on a Ford 1500 4wd...first on the hit list tho are 80' aspens that need a major thinning.Can we start a discussion on what to do with aspen/popple/poplar since this whole project started for me because since I coulndt get any loggers to do the job for the logs I figured that for the money I would spend I could get most of the equipment myself :-)I am open to any suggestions anyone can give...I have learned more in the last 4 weeks about tractors and logging and falling trees than I ever had the slightest idea ever existed!Kim ....
Reply to |
Quote Reply |
Add Photo
Go Top
Share This