Posted by Oliver550Dave on May 28, 2022 at 11:14:55 from (137.118.167.228):
Posting here and in Implement Alley - Bolt broke that locks the push bar in proper tilt on my NH451 pittman-less hay mower. When I picked up the lock (part #63752) from the local CNH dealer, I asked for and got the bolt, lock washer, and nut that I supposed would fit, but there is no way that I have found to turn that bolt and get it into the hole on the inside of the push bar assembly. Measuring it, the bolt is G5, 5/8 x 2.5 cap screw. Thinking I had too long a bolt, I picked up a 2.25 bolt but that is also too long - or I haven't figured out how to position the bolt to get it to go in the hole! Looking at Messick's/New Holland parts diagram, I now see that there is are entries for Hex Bolts, 5/8-18 x 1.75, G5, but is doesn't seem like these would be carriage bolts (machine bolt, round head, short square neck) which the application calls for.
What do I really need to get this mower back together? A shorter carriage bolt, or use a hex-head 5/8 bolt with lock washer and nut?
Any other advice appreciated!! I use this mower behind a Ford 3930 tractor.
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