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Oldoug 
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Joined: 12 Sep 2009
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 Topic: Looking for any suggestions/comments on this!!!
Posted: 22 Feb 2012 at 8:03pm |
I bought a little ALLIS-CHALMERS 172 shredder on a farm sale last fall, at the time I was pretty excited that it was pretty close to home, but the more I dig into it the more I wish I would have had second to last bid. I knew this was wrong with it when I bought it. Somebody at some time welded the slip clutch together. The parts are not availible new from all mighty AGCO. I guess I'm just looking for some opinions here on what to do, just run it this way and hope you don't hit something that causes tractor PTO damage? I'm kinda daydreaming about cutting it in half and welding some little tabs on each side for shearbolts. Any idea's or comments are apperciated. Thanks.
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Matt Folkers
FOLKERS RESTORATION
Restoring vintage things to last so the future can enjoy our past.
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Lonn
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Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29805
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Posted: 22 Feb 2012 at 8:11pm |
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Will a slip clutch from something else work? Something that will fit that shaft.
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-- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... -
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monitordoc
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Joined: 15 Feb 2010
Location: Minnesota
Points: 187
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Posted: 22 Feb 2012 at 8:15pm |
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My bush hog was like that. Clutch plates from another brand fit. works good now.
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WD,D17-S4,180,D21
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Roger Nolin
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Joined: 12 Sep 2009
Location: Monroe Iowa
Points: 189
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Posted: 22 Feb 2012 at 8:33pm |
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in the 60s a dairy farmer bought a new Kelly Ryan feeder wagon. Before he took it home from the dealer he had them weld solid all the slip clutches. Said it would save him time later by not having to keep tightening them up. Dealer did not want to do it but the farmer insisted. needless to say all of the farmers equipment was very rough and broken.
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Rfdeere
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Joined: 11 Sep 2009
Location: Idaville, IN
Points: 3283
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Posted: 22 Feb 2012 at 8:45pm |
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I see two slip clutches ? Is the other one good ?
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EricTn
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Joined: 11 Sep 2009
Location: Mid Tenn
Points: 98
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Posted: 22 Feb 2012 at 8:46pm |
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Is the welded part actually a free running clutch? Might not be the proper name for it! Looking on the other side of the U-joint, that looks more like a slip clutch. Is there a spring that is just out of the picture? What do others think? Eric in TN
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TimNearFortWorth
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Joined: 12 Dec 2009
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Posted: 22 Feb 2012 at 8:46pm |
If I recall, the 172 is typical of the 160 for gear box and shear pin protection. My 160 can be taken apart by removing the retainer nut just behind the rear yoke that is in front of the pieces someone welded together.
If you can grind off the weld, the two halves are kept engaged by two shear pins that are sping loaded.
While out of gear, you will here a "ratcheting" sound as the two shear pins ride over the locking segments when you turn it backwards to access the grease zirks. They will snap as they ride over the pin mating holes as the sping in each pin makes them positively engage when used and i have never sheared them.
They may have welded it together due to the shear pin mating holes having been "egged", but the original assembly is tough, very tough and you need to check that the retainer nut on the rear yoke is always snug or the pins will get enough play so as to shear.
Tough unit and mine will take off trees 2-1/2 - 3" OD with my D15II.
Watch the front seal on the gear box as they are prone to leaking; I run a few shots of grease combined with 90 wt. and the occasional shot of STP oil treatment as my front seal area has started to wear and is slightly scored.
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
Points: 10769
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Posted: 22 Feb 2012 at 9:01pm |
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The welded piece closest to gear box is an over-running clutch. It is to keep from pushing a tractor forward thru the PTO gears. The clutch to the left is the slip clutch as Eric stated. Sould be a spring with a tension nut just outboard of thet. HTH Tracy Martin
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No greater gift than healthy grandkids!
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Pat the Plumber CIL
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Joined: 11 Sep 2009
Location: Springfield,Il
Points: 4931
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Posted: 22 Feb 2012 at 10:26pm |
Like Tracy stated the welded clutch is over running clutch and other is slip clutch . I saved the same mower from a fence row last summer. I repaired my over running clutch as the pins were wore off.Who ever abandoned it may have thought the gearbox was shot .Cleaned it up,put new springs and pins in and works just fine.Was different to see PTO shaft stop spinning as soon as you press clutch down.As long as you have a tractor with hand clutch or live/independant PTO you could just leave it welded. It is the weak link and will require some attention if you make it operational again. 
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You only need to know 3 things to be a plumber;Crap rolls down hill,Hot is on the left and Don't bite your fingernails
1964 D-17 SIV 3 Pt.WF,1964 D-15 Ser II 3pt.WF ,1960 D-17 SI NF,1956 WD 45 WF.
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skipwelte
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Joined: 29 Oct 2009
Location: Anthon, Iowa
Points: 723
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Posted: 22 Feb 2012 at 10:35pm |
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There are two pins and two springs that make the over running clutch work. What probably has happened is the pins can stick in the hole, the springs wont move them out so there is no clutch, it wont drive. Those pins can be a bearcat to get unstuck, may have to drill a hole in the housing and use a punch to get them to move. Sometime the holes get worn so oblong that the pins keep shearing off, cheap fix is to weld it. Save it Matt, they are a good mower!!!
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Nathan (SD)
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Joined: 11 Sep 2009
Location: Day County SD
Points: 1278
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Posted: 23 Feb 2012 at 2:54am |
Didn't someone have a post years ago about using the spring and cog combo from a NH rolla-bar rake to fix their over-running clutch that was slipping?
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Dick L
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087
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Posted: 23 Feb 2012 at 4:50am |
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Thousands of rotary cutters out in operation without slip clutches but you have one and you can buy an over run clutch to put on the tractor power take off ahead of your shredder.
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David Maddux
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Joined: 13 Sep 2009
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Posted: 23 Feb 2012 at 6:22am |
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Two years ago I bought parts from Agco to repair my slip clutch. The over run clutch parts may have been obsolete at that time. I would love to find the aprons with the deflecting chains for mine. If there is any laying in the scrap yards I would like to have them. Dave.
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B26240
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Joined: 21 Nov 2009
Location: mn
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Posted: 23 Feb 2012 at 6:27am |
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You can also buy the new slip clutch with springs and a disc, wouldn't be AC but would give protection.
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Rawleigh
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Joined: 14 Sep 2009
Location: White Stone, VA
Points: 421
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Posted: 23 Feb 2012 at 9:22am |
Like Dick said, you can buy an over running clutch that slides onto the tractor PTO shaft ahead of the driveline if you don't have a live PTO. Live PTO made them obsolete except for old tractors. Here is one (they are available in all of the various driveline sizes): http://www.tractorsupply.com/overrunning-pto-coupler-1-1-8-in-x-6-female-spline-0271148Also aftermarket slip clutches are available if needed: http://www.tractorsupply.com/pto-slip-clutch-1-3-8-in-6-in-spline-shaft-0271211The slip clutch is the same design used on the All Crop harvesters. DO NOT GREASE THEM VERY MUCH. THE BOOK CALLS FOR ONE A YEAR. If you over grease it it will slip when you engage the PTO. I had to spray my Allcrop one with brake cleaner to remove the excess grease from between the plates.
Edited by Rawleigh - 23 Feb 2012 at 9:26am
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