chrisdm8 Posted July 25, 2008 Posted July 25, 2008 Hi, While I wait for parts, I decided to dig out the bevel gear box and see why it's loose. This seems like a simple question but I figure I'll ask before I do any damage .... Does anyknow know a clever way to remove the pulleys from either side of the bevel gearbox without damaging them. I put a gear puller on it but stopped as soon as I saw it start to flex the outter edge of the pulley. Thanks!
tomh Posted July 25, 2008 Posted July 25, 2008 On my tractor, there is a set screw that holds the pulley in place. With that loose, the pulley should come off ok.
chrisdm8 Posted July 25, 2008 Author Posted July 25, 2008 I loosened the set screw first, and it didn't budge. I have sprayed it with PB blaster and we'll try again in the morning.
Simpleton7016 Posted July 25, 2008 Posted July 25, 2008 I have beaten the snot out of pulleys and ruined several in the process. One trick I learned by accident is to grind down the exposed end of the visible shaft (if any). For some reason, the few that I have done this to mushroomed slighly and after grinding them a millimeter or so all the way around....the pulleys came off.
perry Posted July 26, 2008 Posted July 26, 2008 heat, lubrication, time and patience should get the pulleys off. i have also used a pickle fork and lightly wedge it betwenn the box and the pulley. or stick the claws of a hammer on the backside and tap it with another hammer. i have definitly ruined alot of pulleys due to me having no patience. so take your time getting the pulley off and put anti-sieze on any of them stuck parts when putting them back together.
4xbill Posted July 26, 2008 Posted July 26, 2008 If you have enough room behind the pulley, I use a bearing puller and then use the gear puller on that. http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=3979 And if that doesn't work, I destroy the pulley. Once it's off, i swear alot and throw it across the yard. (swearing is optional, but makes you feel better)
chrisdm8 Posted July 27, 2008 Author Posted July 27, 2008 Thanks, I was trying to picture what I could get behind it .... all good ideas.
dirtmister16 Posted July 27, 2008 Posted July 27, 2008 I've always loosened set screws, oiled like a mad man. hit with BRASS hammer. oiled, heat, hammer, heat and pry at the back till it came off. remember to try to rock the pulley when prying from back side, one side then the other. take your time and walk away when your mad at it. my 2 cents
chrisdm8 Posted August 4, 2008 Author Posted August 4, 2008 Hi, Thanks for all the advice ... I did manage to get them off this weekend by using everything advised and only destroyed one pulley (out of the three). I'm glad I asked though, I never would have thought that the shaft had mushroomed a little on the end but without knowing that I would have never gotten them off. Thanks again!
dirtmister16 Posted August 5, 2008 Posted August 5, 2008 no problem, always a good idea to ask others. enjoy your tractors.
MrSteele Posted August 6, 2008 Posted August 6, 2008 I didn't see your post in time, but a good way to remove pulleys is to add solid shims behind the pulley at the hub, either all the way around or at least in two opposite locations. Wedge the shims in as tight as you can to remove all slack in the shaft. Use your favorite penetrating oil on the shaft, in the keyway and in the setscrew hole. Let it soak a while, then using a soft drift( I normally use an oak dowel) and a hammer, tap the shaft. It might take a while and a good amount of penetrant, but it will not damage the pulley or the shaft.
rsnik Posted August 9, 2008 Posted August 9, 2008 Well Erik's advice, above, paid off for me today. I got the BGB replacement project restarted today. Went to remove the cast iron, rear PTO pulley on the BGB: Doesn't want to come off. I take a close look: Sadly a PO has beat this pulley like a step child and there is visible mushrooming. Even more sadly, the pulley is ruined. Here is another close look after I removed it (the cast iron pulley number stamped on it is 105178 - feel free to PM if you have a spare): Bad news is all the hammer beating on it, good news is after grinding off the mushrooming and warming it a little with propane it came right off. This pic shows it broke free, it just slid right off from this point:
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