kb65 10 #1 Posted 8 hours ago new issue Broke a bolt in the differential. this is the second time. first time was several years ago. I fixed it up with some parts i had and replaced all 4 bolts with grade 8 3/8-16 x3.5" bolts this time the broken bolt popped a hole in the bottom of the case. I think i may have a spare case half But may need part 2822. it is the side of the diff case. Any one else have this issue? Share this post Link to post Share on other sites
pfrederi 20,886 #2 Posted 7 hours ago I haven't ever broken one. What Kind of lock nuts did you use?? If it loosens up the slop will lead to breakage. I am now using these 3 Share this post Link to post Share on other sites
ri702bill 12,509 #3 Posted 7 hours ago Welcome! Are you using, or re-using the Eslok hexnuts in the assembly? Do not use pegular hexnuts or nylok nuts! Just where did the bolt break - at the head, at the end of the threads? Eslok nuts are not supposed to be reused without Loctite, as the split fingers loose their grip strength when removed and reused. One solution - use grade 8 3/8 24 fine pitch bolts & new Eslok nuts. The threads are stronger on a fine pitch over using the coarse thread. Very important - torque and retorque to verify the nuts are properly tightened when you assemble the diff... 2 Share this post Link to post Share on other sites
Ed Kennell 46,615 #4 Posted 7 hours ago Bill and Paul, just curious. Do you need to increase the recommended torque when using the mechanical locking nuts. Share this post Link to post Share on other sites
pfrederi 20,886 #5 Posted 7 hours ago I don't but never really thought about it Share this post Link to post Share on other sites
ri702bill 12,509 #6 Posted 6 hours ago 47 minutes ago, Ed Kennell said: Bill and Paul, just curious. Do you need to increase the recommended torque when using the mechanical locking nuts. I do not believe so - the torque spec for that application is for using the Eslok nuts... Share this post Link to post Share on other sites
kb65 10 #7 Posted 5 hours ago this is a 2 pinion diff 4 bolts hold it together and thread into the other half no nuts. I do have most of a 10 pinion unit. I am missing one of the side gears, 2 of the pinion gears and the snap rings that hold the axles to the side the side gears. this is a 1276 tractor. 1 Share this post Link to post Share on other sites
ri702bill 12,509 #8 Posted 3 hours ago (edited) Wow! Looking at the 1276 IPM Manual, that is THE lightest duty diff design I have ever seen in a WH.... Maybe time to upgrade to a more robust design Hydro?? Not exactly cheap, but would solve the breakage issue. Edited 2 hours ago by ri702bill 1 Share this post Link to post Share on other sites
