The 350 and 450 movers are a darned good cutting mower, but the wobble box is a weak point, and often fails badly to the tune of lots of $$$$$$.
There is a pin (Key #5) that that knife drive lever pivots around that is clamped into the base of the wobble box casting.
90% of the time the mower has got to this point, the clamp area in the casting is wallowed out or broken off. A new casting, key #13, part #AE31780 is over $700.00.
SURE hope your's hasn't gotten to that point, and that a new pin (#25), bearing (#29) and a couple of bearing cups (#5) will fix it up for you!
I have 5 mowers with that same drive (#450's) laying around, with the casting bad in all of them!
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Today's Featured Article - New Hitches For Your Old Tractor - by Chris Pratt. For this article, we are going to make the irrational and unlikely assumption that you purchased an older tractor that is in tip top shape and needs no immediate repairs other than an oil change and a good bath. To the newcomer planning to restore the machine, this means you have everything you need for the moment (something to sit in the shop and just look at for awhile while you read the books). To the newcomer that wants to get out and use the machine for field work, you may have already hit a major roadblock. That is the dreaded "proprietary hitch". With the exception of the
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