PTO overrun clutch

[EH in KS]

PTO overrun clutch. How do they work, where do you get one? I think I could use one on my H for mowing, but i don't know much about them. How big of a job to install? Thank You!

 

[Nebraska Kirk]

They basicly allow the tractor to power the implement, but will not allow the implement to transmit power back through the PTO, a must when running a Bush Hog with a tractor without live PTO. Most Farm/Home stores should carry them as well as implement dealers. They are eaisy to install, they slide on your tractor's PTO shaft and are secured in place with a roll pin. If you are using a sickle mower, you don't need the overrunning clutch. But if you are using a Bush Hog, then it is a MUST. The flywheel effect of the spinning blades can and will, through the PTO, power the tractor forward and cause you to run through a fence or a building!

 

[ScottyHOMeY]

Basically, it fits into the drive line, between the output shaft on the tractor and the input shaft on the implement.

It lets the output shaft drive the implement, but allows the implement to spin down without driving the tractor forward when you want to stop. The usual non-live, direct drive PTO set up is a solid connection so any inertia of the implement will feed back through the gears until you get it stopped. This eliminates that.

I haven't torn into one, and may be entirely washed up on this, but suspect it's a pawl type arrangement, similar in concept to the guts of the common hand-ratchet.

Simple installation, but you MIGHT have to shorten the input shaft on your mower, if you don't have enough adjustment in it to accommodate the extra few inches that the over-run clutch extends off the tractor shaft.

 

[SuperA-Tx]

I went for 40 years without one but put one on our 140 last year after my cousin told me about his. I wouldnt do without one now. Losts easier to shift gears too.

Its an easy job to install, just one pin. Takes two minutes at the most.

They sell them here at YT. Tractor supply has them. Im sure most tractor places have them.

 

[Anonymous-0]

Before we had such devices we learned to pop the tranny in nuetral or pop the pto out of gear easy to do

 

[NDS]

They are nice but I ran rotary cutters 40 years without one and got along fine you just have to allow room to stop or shift PTO out of gear or use brakes to stop tractor and cutter. If you run up to fences, buildings or whatever before preparing to stop you need the ooverrun clutch for sure.

 

[Janicholson]

I agree, It is easy if planning experience, equipment and space is available. However the difference between oldsters like us that have the 40 years+ doing it, and a new driver on unfamiliar equipment is dramatic. I reduce risk when possible especially in recommending safety equipment that is cheap.

 

[Dave S.]

If the clutch is going to see a lot of use take a look at the ones Agri Supply has. I had one from tractor supply on a H with 6' brushog and wore it out in 2 years. They also have slip clutches reasonably priced.

www.agrisupply.com
Item #31949 or 32439 which ever serves your purpose