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John_B 
Bronze Level
Joined: 09 Aug 2010
Points: 22
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 Topic: WD45 Shears PTO Bolts
Posted: 11 Jul 2011 at 1:49pm |
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After shearing off 3 bolts where the PTO shaft bolts to the PTO gear drive, I took a closer look at the holes and discovered they are egged out in both the PTO shaft and the short shaft in the PTO drive. What would cause this? Have only run the PTO for a few hours since purchasing the tractor last summer, and this was to drive a 5 ft brush-hog. The brush-hog has a new slip clutch and pto shaft. I don't detect any up and down play in the rearshaft bearing either.
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tractorboy
Silver Level
Joined: 03 Oct 2009
Location: southern Va
Points: 468
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Posted: 11 Jul 2011 at 2:07pm |
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Are you using the correct bolt??? I had the same problem, "egging" till put the correct bolt in, can't remember where I ordered them from. The correct bolt has a larger shoulder than the threads are. Order at least 2, also if the egging is bad you may need to get that fixed, for the new bolts to help the situation.
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FHOliver
Bronze Level
Joined: 11 Sep 2009
Location: Elgin Il
Points: 58
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Posted: 11 Jul 2011 at 4:05pm |
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agco used to supply a weld on end for the pto shaft where you cut off the old end and weld on the new giving you a proper size hole. Use the correct bolt from acgo. Okie who used to post on here makes the replacement ends also and a lot cheaper than agco. If you want his number ill try to find it. He makes a nice replacement part. Havent seen him here for quite a while. Good luck
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norm[ind]
Orange Level
Joined: 29 Oct 2010
Location: bourbon,ind
Points: 2992
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Posted: 11 Jul 2011 at 7:23pm |
can drill a new hole at 90 degrees and use the corrct bolt might help some
1-574-342-4545 for help
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wfmurray
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Joined: 13 Sep 2009
Location: Bostic NC
Points: 1225
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Posted: 11 Jul 2011 at 7:32pm |
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Drill hole one sixtenth over and put grade eight bolt in . Slip clutch should take care of machine . Clutch might be to tight.
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MACK
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Joined: 17 Nov 2009
Points: 7664
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Posted: 11 Jul 2011 at 10:09pm |
The tractor is only 54 years old or older. In the past 54 years i'm sure the PTO has been used alot so there is wear in both pieces.
Don't put a grade 8 bolt in there. Better to replace a shear bolt than all 4 gears and housings. MACK
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Ryan Renko
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Joined: 12 Sep 2009
Location: Edwardsville, I
Points: 2326
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Posted: 11 Jul 2011 at 10:13pm |
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Amen Mack!!!! Bolts are really cheap compared to parts! Ryan
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Lonn
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Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29792
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Posted: 12 Jul 2011 at 6:27am |
I had the PTO stub shaft rebuilt and an old mechanic with a lathe make a new weld on sleeve for $20 for my WD and it works fine. The WD45 did have some trouble with blowing gear boxes so I was told by an old AC mechanic years ago. To get 540 rpm on a 45 you have to throttle back so that might save the gear box.
I'd hate to see what AGCO would charge for that sleeve. I bought a new sleeve 20 years ago from Deutz-Allis for something like $12 but I'm sure AGCO sees a lot more value in that sleeve today if you can still get it.
Oh no, forget I mentioned rpm and throttle back. LOL
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JoeO(CMO)
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Joined: 11 Sep 2009
Location: Cent Missouri
Points: 2694
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Posted: 12 Jul 2011 at 6:33am |
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BOLTS are meant to shear, NOT GEARS and SHAFTS!
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Tedin NE-OH
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Joined: 30 Mar 2011
Location: OH
Points: 177
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Posted: 12 Jul 2011 at 10:09am |
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If you use OEM bolt and start up slowly should have little problem
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Orange Tractors
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Joined: 13 Sep 2009
Location: Butler, MO
Points: 172
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Posted: 12 Jul 2011 at 8:08pm |
The holes are egg shaped because in years past farmers used what ever bolt they had, even if it was too small.
Do not use a grade 8 or even a grade 5 bolt. It is a whole lot easier and cheaper to replace the shear bolts than to have to replace gears or cast housings.
What I use is a 7/16" grade 2 bolt, long enough that the unthreaded poortion fits all the way from one side to the other of the PTO shaft. Buy a couple of pounds of bolts and nuts and peen the end to keep the nut on.
Sometimes you can go all day without breaking a shear bolt, other days it seems like you can't even get the brushhog up to speed before one breaks.
Robert
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WD45
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Joined: 20 Sep 2009
Location: STAYNER,ONTARIO
Points: 954
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Posted: 12 Jul 2011 at 9:45pm |
We have never had the pto bolt shear in any of our WD45's since 1984.
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Fred Dunlop, G,B,CA, WC,WF, 3 WD45`s,gas, diesel and LP,U,D10 series III, D12,D14,D15 SERIES II,D17 Series IV in Gas and Diesel ,D19 GAS and D21,170 185,210 ,220 an I-600 8070 fwd, 716H and 1920H
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