PTO adapters, and a PHD question

[tn8n]

sheared the pto adapter today for the second time, the one which slides over and pins onto the pto shaft on the tractor. i have been buying them from tsc. other than replacing the pto shaft with one the correct size, there is really no better way to do it, right? the first time i was bushhogging, didn't hit a stump or anything and all of a sudden the mower stopped, and the adapter had sheared. today, i was using the PHD and not long after it started digging, it sheared. the bit was not buried or on a root, i was able to pick it up out of the hole by hand immediately after. i can understand if i was hitting obstructions with the hog, or over-working the PHD, but are the adapters just inherently weak? maybe it's good that they break and not something vital!


as for the PHD, are there any "tricks" to lift it high enough to keep from dragging the bit? the horse collar has about ten holes for where it attaches to the shaft of the digger, but i couldn't tell much difference in any of the holes. the one in the middle seemed maybe just a tad higher. if not lift height, what are the different holes for?

 

[souNdguy]

if you are using the lil sheetmetal bushing.. that's the problem.. get a stub adapter.. more meat.. or an orc.. even more meat.. even if the orc part is not needed. OR hange the shaft. ORC is 60% the cost of a new shaft...

 

[55deere70]

I have broken all types of adapters except the ORC that has 1 1/8 ID and 1 3/8 OD.

 

[Royse]

If you're running the rotary mower with an N, you should have the ORC.
Whether its 1 1/8 or 1 3/8 shaft. Keeps the mower from pushing the tractor.
As SG said they're pricey, but not as pricey as a new grill/hood plus whatever you may hit.
As for the PHD, maybe the angle of the PTO shaft had something to do with
it fracturing when you were running that, hard to say.
I'm not familiar with your setup to help with the height.
I had the same problem with a home built one I bought at an auction.
I had to modify the lift arms on the digger itself. But again, it was home made.

 

[old]

Explain things better. Are you saying you have messed up an ORC or are you saying you have messed up one of those cheap junk slide on 1-1/8 to 1-13/8 slide on things. If a slide one thing well you should not be using that and brush hog or sooner or later you or some one else WILL get hurt since you NEED an ORC NO MATTER WHAT

 

[Phlash in OK]

I wear out one or two adapters a year. When I bought my bush hog they didn't have the 1 1/8 ORC so I bought the adapter. I've spent enough on adapters I could have bought the right ORC or the later PTO shaft for the same money. Some day I may get it right.

 

[souNdguy]

tsc and others sell the slide on stub atabler, that once pinned on makes the 1 1/8 shaft identical loking to the 1 3/8.. it's much better than the lil sleeve adapter..

 

[TL (Va)]

I used a 1-1/8 to 1-3/8 over running coupler on my phd and had no problems. Check your shear pin and make sure its the proper grade-it should be the weakest link, so you break a 99 cent bolt instead of something more expensive. Someone had replaced the pin in my used one with a grade 5 instead of the grade 2 it was supposed to have.
you don"t need to run wfo to dig either, works just fine at 1/4 to 1/3 throttle

 

[ericlb]

i agree with the others yu need to put a overrunning clutch on the pto shaft there a lot stronger and better, ive used those adapters with the same results, your getting, there china made and cheap and the metal in them isnt good quality, they will not take much of a shockload and a post hole digger is just that , how long is the bit on the post hole digger? the tractor should lift the standard 3 foot bit well clear of the ground with the regular arch to the lift arms and pole to the top link holes setup, can you post a pic? so we can see whats going on with yours

 

[TheOldHokie]

(quoted from post at 22:03:05 11/30/12) sheared the pto adapter today for the second time, the one which slides over and pins onto the pto shaft on the tractor. i have been buying them from tsc. other than replacing the pto shaft with one the correct size, there is really no better way to do it, right? the first time i was bushhogging, didn't hit a stump or anything and all of a sudden the mower stopped, and the adapter had sheared. today, i was using the PHD and not long after it started digging, it sheared. the bit was not buried or on a root, i was able to pick it up out of the hole by hand immediately after. i can understand if i was hitting obstructions with the hog, or over-working the PHD, but are the adapters just inherently weak? maybe it's good that they break and not something vital!


as for the PHD, are there any "tricks" to lift it high enough to keep from dragging the bit? the horse collar has about ten holes for where it attaches to the shaft of the digger, but i couldn't tell much difference in any of the holes. the one in the middle seemed maybe just a tad higher. if not lift height, what are the different holes for?

You sheared tha adpater - not a pin?
One end of the adapter is a thick wall steel socket with an 1-1/8" x 6 female spline.
The female end slides over the PTO and is pinned in place?
The other end is a solid steel 1-3/8" male six spline shaft that extends rearwards from the socket?
The adapter is not an over-running coupler but rather a stubby little "one piece" steel shaft with a female and male splined end on it?

If the answer to all of those is YES you need to find another source of supply for the adapter. And a source that does not sell the POS brand you are currently getting at TSC. Just out of curiosity where does it shear? I'm betting through the wall where the male spline transitions to the female spline which is quite possibly a welded joint.

TOH