.5racer 14 #1 Posted February 11, 2012 Ok here is my question or thought . Most D's are rated at a high RPM for the PTO , what are the other brand PTO's ratings, 550 . Now the hard part !! What is the dia of the clutch pulley and thePTO pulley of THE OTHER BRAND verses WHEEL HORSE D's . Can we not change the pullies to compensate to the 550 rpm and buy other type atachments and expand!! I'm here all weekend and willing to listen and learn ,,,,,,,,,,,,,psssssss I'm a machinist and can mill or lathe anything !!!!!!!!!!!!!!!(( yea I'm THAT good !!! )) Share this post Link to post Share on other sites
1maidenfan 202 #2 Posted February 11, 2012 Thats a good thought , in order to get the rpm's down that far the pto shaft pulley would have to be made bigger and not sure there is enough room to make one big enough? It is already bigger than the clutch pulley. Share this post Link to post Share on other sites
.5racer 14 #3 Posted February 11, 2012 What is the pulley size of a mid 80 ( cough , cough ) 400 john Deere or another compatiable size trac,,,,mower ? Share this post Link to post Share on other sites
1maidenfan 202 #4 Posted February 11, 2012 No idea? Wheel horse guy . Share this post Link to post Share on other sites
Hodge71 668 #5 Posted February 11, 2012 Doing some preliminary math, You would never have enough clearance between the frame rails to have a pulley large enough to get down to 540 rpms from the 2000 rpms that our PTOs run now.The motor turns at approx. 3200 rpm, it has a 5 inch pulley for the pto output on the engine. In order to get down to 540 rpm output for the output speed you would need a 29.5 inch pulley on bottom. Not matter how good you think you are it wont fit...nice try your excellency.... Share this post Link to post Share on other sites
wh500special 2,277 #6 Posted February 11, 2012 Although many things are possible, there's more at work here than just the PTO speed. The D-auto's have a cat-0 hitch which will limit your geometry to cat-0 implements. Not very many of them are designed to accomodate anything other than a 2000 rpm rear PTO since that's sort of a "standard" for GT's. At least the rotation direction on the D-autos should be the same as other GT's from Deere, Cub Cadet, etc. The D250 spins 1000 rpm the other way. I had an adapter that was chain driven off the rear PTO shaft to convert the 2000 rpm to somewhere around 540 (which is the ag standard by the way). i don't remember if I still have it or if I sold it though. It is/was a simple affair, but was only for stationary use. Making the change to 540 probably wouldn't be too tough for a fabricator, but I'm not sure what compatibility success you'd have. Steve Share this post Link to post Share on other sites
1maidenfan 202 #7 Posted February 11, 2012 I knew it was going to have to be fairly large to get it down that low. I take it the side pto engines get it down from multiple pulleys? Not sure what attachments .5racer is wanting to use on his D? Share this post Link to post Share on other sites
wh500special 2,277 #8 Posted February 11, 2012 Found a picture of the PTO reducer thingy I have/had. This is as good as it gets... In my typical style, this is a lousy picture. It's what I do. But look at the cool Royale walk-behind reel mower next to it! In this case, you might be able to see the chain and sprockets. On the opposite side is a standard 6-spline ag shaft. The large sprocket has about 4 times as many teeth as the smaller one, hence the 4:1 redux. The U-joint shaft fits over the D's 21-spline (I think) 1" shaft. Rube Goldberg Share this post Link to post Share on other sites
Hodge71 668 #9 Posted February 11, 2012 Yeah from what I rmember from my bros 195, the Super C had quite the unique setup to lower the RPM for the rear PTO output..... Very nice engineering there on the 4:1 Steve Share this post Link to post Share on other sites
wh500special 2,277 #10 Posted February 11, 2012 Thanks, but I didn't build it. I bought it. I've seen a few more of these thru the years but I don't think they were factory made. I had a PTO reducer for a John Deere 318 in my possession at one time. Sold it for a ton of money since it was apparently one of the most rare attachments Deere made. I looked on my photobucket account and on this computer and asked the googles, but no pictures found. It was similar to the item pictured, but everything was neatly packaged inside a handsome sheetmetal box. Concept was the same though. It was, of course, for stationary use too. I suppose items like this and the front mounted 540 units were for bale elevators, augers, etc. Not for bush-hoggin the back 40... Steve Share this post Link to post Share on other sites
.5racer 14 #11 Posted February 11, 2012 HUMMMM Excellency Huh ............LMAO ,,,,,,,THANKS ...I Think 3200 ,, 5',, gotta get to 540 29.5 huh ..... I dont want to use a reducer thats inline. ......................puley........ so neg, so neg ......Come on all THINK Posi ....... ............ ................... why not produce a PTO pulley as an aftermarket to reduce the origanal bottom pulley maybe with a stock clutch ???? ......... .............. .................. Share this post Link to post Share on other sites
pfrederi 18,713 #12 Posted February 11, 2012 Given the diameter limit on the lower pulley imposed by the frame rails you would have to try to reduce the PTO unit sheave also. The current PTO has 2 sheaves and the inner one drives the rear PTO. Even if you could get it down to 3 inch diameter and bump the lower pulley to 10" (I would have to measure mine to see if it would fit) you would still be about 960 rpm at 3200 engine. Get the PTO down to 2" and you would be at 640 ...close enough probably, but the engine shaft is 1-1/8 and it might be hard to maintain the second PTO sheave Share this post Link to post Share on other sites
