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post #1 of 5 (permalink) Old 07-25-2019, 03:22 PM Thread Starter
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Completely Corn-fussed on this Craftaman Model 917.288520

Background: Working on the Churches Lawn Mower. It is a YT-3000 46" cut(917.288520). This was a mower given to the church. I recently got it going installed a new drive belt and a new set of blades. We already had one Craftsman YT-3000 42" cut(917.288515), so we now we have two---a 46" cut and a 42".



On the 46" cut the Mandrel shaft bottom star pattern where the blade fits into is for some reason badly worn where the blades had to be tightened up super tight to keep them from slipping or loosening. I recently changed out both Mandrel assemblies on the 42" with new aftermarket ones and kept the old craftsman ones. I thought since I saved the old mandrel assemblies I would just remove those old shafts from those mandrels I saved from the 42" cut mower and install them on the 46" cut because the shafts are in good shape, except for the bearings.


Problems: First problem I encountered is the mandrel on the 42" is four bolt and the one on the 46" cut is three bolt. So I thought I would check part numbers on the shaft and bearing to see if they match. So I looked at Craftsman Parts on-line using my model number 917.288520 and it shows the four bolt mandrel in every case. On every search I did using that model number it showed 4 bolt mandrels in every case and the shaft part numbers don't match. The part number for the three bolt mandrel appears to be 532130794 with the new revised number 130794. I can't find a single Craftsman Manual that matches this 46" cut with these 3 bolt mandrels. From my research, they only put the 3 bolt mandrels on up to 42" cuts and no higher. I didn't get any manuals with this 46" cut and can't find any manuals to match what I got. I may have to forget the shaft change outs and just get whole new mandrel assemblies for this 46"cut if I can't identify if they take the same shafts. Corn-fused---any help appreciated. motorman

Last edited by motorman; 07-25-2019 at 03:32 PM.
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post #2 of 5 (permalink) Old 07-25-2019, 08:11 PM Thread Starter
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What I'm trying to say, is when you look up the Sears-Direct parts for the YT3000 46" Model 917.288520
The Mandrel assembly is old number 187281 now replaced with #587819701 which is a four bolt mandrel assembly---but what's actually on the deck I got is the three bolt mandrel assembly which my best guess is number# 130794.


So how am I to be sure that the three bolt mandrel assembly I got is the #130794 when all references to my model number 917,288520 point to the four bolt Mandrel #587819701????? I've done a ton of research and can't find one reference to a three bolt Mandrel ***'y. This apparently is a Frankenstein build? motorman
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post #3 of 5 (permalink) Old 07-26-2019, 04:33 PM Thread Starter
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I was looking for an option to delete a complete thread but I don't see any. I would delete this one if I could. So moderator you got my permission. Thread is based on a mistake on my part. The Craftsman 46" cut Model 917.288520 has 4 bolt Mandrel Assemblies, not three bolt as I thought. I even looked at it to verify but I must have been cross eyed! Sorry! Please disregard. motorman
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post #4 of 5 (permalink) Old 07-27-2019, 01:38 AM
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I'm pretty sure everyone who's ever worked on mowers has gone crazy reading a parts diagram at some point....

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post #5 of 5 (permalink) Old 07-27-2019, 05:02 PM Thread Starter
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Yeah, thanks for your understanding. Can't believe I drove 16 miles round trip to verify it and still got it wrong. I'm going to be keeping a close eye on myself for at least 30 minuets or even longer:>)
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