Re: BUSH HOGING WITH A FORD 8N

Posted by David on June 06, 2000 at 15:26:55 from (170.253.240.1):

In Reply to: BUSH HOGING WITH A FORD 8N posted by Daniel Dickerson on June 06, 2000 at 13:56:06:

First, make sure everyone understands the terminology. A slip clutch only protects the gearbox on the bushhog or tractor when a large stump, rock or whatever is hit by the blades. It's about 8 inched in diameter and attaches to the PTO shaft at the implement end. An overrunning clutch keeps the momentum of the bushhog from back-driving the tractor transmission when the clutch is pushed. It has a oneway racheting action to permit the blades to continue spinning while the tractor comes to stop. Without it, the tractor would be pushed until the blade momentum stops - obviously dangerous. However, an overrunning clutch will not offer any gearbox protection if an object is struck by the bushhog. An overrunning clutch is needed by all tractors which do not have "live" PTO which allows the PTO to be disengaged independent of the engine transmission. Many pre-1960 tractors (including 8Ns) lack live PTO. 8Ns also lack live hydraulics which means that the transmssion and PTO must be engaged for the hydraulics the work. In my opinion, this drawback makes the 8N less than desireable as a bushhog machine, buts lot's of folks still love 'em. Your best bet is a tractor with live hydraulics and live PTO. All later hundred series Fords have live hydraulics and some have live PTO, but they are also going to cost more usually.

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