2N PTO Safety

[carpetfarmer]

Back in November I bought a PTO adapter to go from the 1 1/8" shaft on the 2N to my 1 3/8" overrun coupler so that I could use a rotary mower. I got it all put together, had the mower about 2' off the ground (NO load), 1/4 - 1/2 throttle, let off the clutch nice and easy and the adapter twisted in two. I returned the adapter to TSC for a full refund and decided not to worry about having a PTO because I don't really have much use for it. Now I'm thinking I should get something figured out because I'll probably need it to mow pasture this spring. Does anyone have any ideas what I can do short of buying a new 1 3/8" PTO shaft.

At first I bought a 1 1/8" to 1 3/8" overrun but the roll pin hole wouldn't line up with the hole on the tractor's PTO shaft, thats why I went with the adapter.

 

[gahorN]

Sounds as if the TSC over-run clutch AND the adaptor are made out of compressed rice-hulls in china. Get an ORC... and get one made in [b:a6842df059]'MERICA ![/b:a6842df059]

 

[Bruce (VA)]

" let off the clutch nice and easy and the adapter twisted in two. I returned the adapter to TSC "

Uh huh. You're not the first person to be disappointed w/ tractor parts from TSC.

Like gahorN sez, just get a good quality adapter & ORC. Clearly, TSC is not the place to do that.
50 Tips

 

[TheOldHokie]

(quoted from post at 12:58:37 04/06/11) Back in November I bought a PTO adapter to go from the 1 1/8" shaft on the 2N to my 1 3/8" overrun coupler so that I could use a rotary mower. I got it all put together, had the mower about 2' off the ground (NO load), 1/4 - 1/2 throttle, let off the clutch nice and easy and the adapter twisted in two. I returned the adapter to TSC for a full refund and decided not to worry about having a PTO because I don't really have much use for it. Now I'm thinking I should get something figured out because I'll probably need it to mow pasture this spring. Does anyone have any ideas what I can do short of buying a new 1 3/8" PTO shaft.

At first I bought a 1 1/8" to 1 3/8" overrun but the roll pin hole wouldn't line up with the hole on the tractor's PTO shaft, thats why I went with the adapter.

The problem with the sleeve type adapters (like I suspect you had) is that the minor diameter of the 1-3/8 spline is nearly identical to the major diameter of the 1-1/8 spline. That means you effectively have no splines in engagement and the thin (1/8" thick) sidewall radius of the adapter is the only thing transmitting the torque. You have reduced the cross sectional area holding the load by several orders of magnitude and that's simply too much to ask for on a 20HP driveline. The elCheapo stamped steel ones are utterly worthless and the machined versions not much better. Get a 1-1/8" x 1-3/8" extension or ORC and drill a hole if need be. Personally I'd replace the PTO shaft with an 1-3/8 and not have to hassle with the non-standard 1-1/8.

TOH

 

[Mike OH]

TOH hit it right on the head.

45 years ago I bought two of the sleeve adapters from my local Ford tractor dealer for my brush hog. Didn't take more than a few minutes to break both of the adapters. I took them back to the Ford Dealer asking for replacements or my money back. The parts man gave me a real hard time and said "No can do, their not guaranteed." I wrote a letter to the manufacturer expaining my problem and suggested they make the wall thicker making the adapter stronger. They came back with a similar answer that TOH stated. I thought it was hopeless and bought an ORC for around $75.00, (if I remember correctly). Wasn't more than a week later UPS left me two replacement adapters in my doorway from the manufacturer. They are now on my parts shelf, and have only used one for my PHD and so far it has held up fine for that application.

 

[carpetfarmer]

Where would be a good place to find a quality, safe overrun coupler, and what kind of price range would we be talking? Does this site sell quality ones?

 

[Dell (WA)]

CF........would you believe most ORC's cost about $50 (cheap) They come in 4-different sexxxes depending upon yer PTO needs. 1-1/8F input to match yer current 2N's 1-1/8M output and depending upon yer brushhogg's input, your ORC can have either 1-1/8M output or modern 1-3/8M output. They are installed with 5/16x2" rollpin (pictured) thru the grease fittings.

Some ORC's are just a little bitt too big OD to fit the older smaller PTO shield sleeve. Would you believe a little bitt of FILING will reduce the OD of the ORC lip and everything will align up slicker'n'snott. Isn't that amazing??? .......respectfully, Dell the ORC safety preacher
typical ORC over running coupler

 

[JoePilot]

My first 1 1/8 to 1 3/8 ORC would not go on far enough to line up the roll pin hole. There was extra material on the mating end, so I took it to the bench grinder and took a bit off. Then it worked fine.

Believe I got my second from this site, and it worked fine.

Joe

 

[carpetfarmer]

Thank you fellas, I"ll take your advice and see what I can figure out.

 

[Colin King]

I"ve been using the 1 1/8" to 1 3/8" ORC which I bought from this site for three years now with no problems. Seems plenty well built.

Colin, MN

 

[Cutty]

AgriSupply $29.10 sale!
http://agsupplyonline.com/.sc/ms/dd... Running Couplers/23674/Over Running Coupler

 

[Cutty]

By the way I have one of these I have bush hogged over 60 hours with it so far. Been holding up fine. Grease the crap out of it regularly. You can't over grease an ORC.