I replaced the chain that drives the tines, but now it wont till forward in forward, it will work in all other gears.
SOURCE: Yardman Rear Tine Tiller tines won't turn. Belt
The problem lies in the shift lever in the gearbox. A poor initial design that was upgraded twice. The shift fork arms have spread enough for pins to come out of the groove they run in when the tiller is shifted to the last position. (Bending back into position would only be a temporary fix as would not be any stronger.) To replace shift lever, the gearbox cover has to be opened. Seperating the cover can be somewhat challenging. When prying cover apart try to not damage the cover gasket. Gearbox grease is very thick, so gasket's real purpose is to keep water and contaminants out. Leave all gearing and chains in place. The shift lever part number is 618-0245B. Or use assembly kit number 753-0869 (contains shift lever 618-0245B, position indicator, and roll pin.) Part will run in the $56-$68 range and can be found through MTD as well as Cub Cadet. Also can get through Sears PartsDirect.
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yes I have the improved version you speak of this is from another forumThe information from the forum applies to the 410 series, rather than the 430. It used a different shifter that underwent modifications over several years but it was a completely different setup than yours. The 430, while not nearly so popular, was a better design. Comparing yours to the 410, the shifter and fork (your #1 and #59) was a single steel stamping on the 410 (picture below) and when folks shifted agressively, or they pushed against internal resistance of the shifter keys to force it rather than rock the tiller back and forth to line things up, it bent out of shape easily. We've sold lots of those upgrade kits over the years. Yours is lots better.
I had part #5(bottom diagram) in the wrong location, so now the tiller works fine. If anyone needs to work on their gear box than can message me here if they want tips .
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