My b2150 HSD developed a "chatter" when clutch was engaged. I split the tractor a couple of weeks back, once inside I found the input shaft and clutch plate splines pretty much wore off. I ordered a new shaft, throwout bearing, clutch plate (the pressure plate looked like new), pilot bushing, and seal. This weekend I started to put it back together found that there wasn't a pilot bushing in the crankshaft, the seal was still intact. The new pilot bushing (66621-14120) is way too small for the bore in the crankshaft, it just flops around in there. It doesn't appear that the crankshaft is wore badly, it seems to me that I need a different size bushing, the dealer says that is the only one specd. for my model and I'm out of luck. Anyone got any ideas or if there could be a different bushing on some of them? Thanks for any info. you can give me.
pilot bushing help
- Thread starter michiganfan
- Start date
This may not be the answer you were looking for but I had ther very same thing on a B7100 I acquired a while back. When I went to check it out depressed the clutch pedal and had a bad rumble, I thought no biggie just a bad throwout bearing. Split the tractor and found it was a bad throwout bearing,, but also no pilot bushing left and the hole was egged out real bad. Since a new or even used crankshaft was way too much. i had to pull the motor apart and send the crank out to a machine shop. They bored the hole oversize, then steel-bushed that hole with the correct ID for my new pilot bushing. That was only reasonable option. And of course I needed a new Jackshaft as the old one got beat up real bad from beating around in the crank. Oh while the motor was apart it only made sense to re-ring and new bearings. Runs great now. Sorry maybe someone knows an easier way.
It probably uses a bearing, not a bushing. I think the Kubota's used 6002ZZ or something like that for the pilot bearing. Measure the bore and OD of the pilot area of the input shaft and I can figure out which bearing it was meant to have. Loctite also makes a bearing mount formula for turning slip fits into press fits which might come in handy.
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Thanks for replies. Last night I took a better look at the flywheel and crankshaft with a set of calipers and they are both wore untrue. I spoke with mechanic who advised to have the flywheel machined to fit a sealed bearing instead of dealing with tearing the motor down. I have already purchased a new input shaft, the O.D. on that is .55" or 14 mm, I'm thinking the flywheel could be cleaned up at about 19 mm. Would a sealed bearing be available with a 14 mm I.D and 19 mm O.D.? Just wondering what you guys thought of this idea.
14x19? that would leave only 5mm for the inner and outer races plus a tiny bit for the balls. Is the OEM bushing a bronze sleeve? You could get a machine shop to turn a oilite bushing that size. But then you wouldn't have the appropriate seal.
http://www.vxb.com/Merchant2/mercha...rings&Product_Code=Kit9398&Category_Code=14mm
This one is close but you'd have to open it up or hone it out another 2mm.
This one is close but you'd have to open it up or hone it out another 2mm.
There is no doubt now that my crankshaft is wore badly, so I've decided to try the sealed bearing in the flywheel option, guess if it doesn't work out at least I'm only out the cost of machining and bearing, seeing how changing the crankshaft is a big job and very costly. Thanks for the link LT1PAT, I do believe that bearing will work for me. There is room on the flywheel to bore to that diameter. I'll post how it works out once done, maybe this will be a cheap fix and help others too. Thanks everyone for the replies.
Follow up. I had a machinist friend bore out the flywheel to accept an oilite bronze bushing with the proper I.D. for a new input shaft that I purchased. Bought new clutch plate, through out bearing and rear coupler and put it back together. It was a little tricky lining up the new bushing and the input shaft but got it done and it works great. Long story short, a couple hundred bucks and I'm back in business, sure beat replacing the crankshaft. Thanks for the input guys.