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timmis 09-28-2009 18:06:27 207.199.212.52 33381 Report to Moderator	I've got a tr70 the gearbox that runs the clean grain auger has alot of slop in it. It's never slipped a gear but I'm afraid it could be close. Everyone says to tighten the bearings - how do I do this? I'm aware this is the weak spot on this combine - I've got about 5 days until the beans are ready and want to have this fixed right. Are there any cheap sources for good used gearboxes? Thank You. [Reply]   [Send Email]
J.ReinkeFarms 09-29-2009 13:26:45 65.48.61.98 33404 Report to Moderator	Re: TR70 bubble up auger gearbox in reply to timmis, 09-28-2009 18:06:27   If you take the gear box off of the combine each "shaft assembly" is held in by set screws, I can't remember exactly how many 3 or 4 each. Each "shaft assembly" is one bevel gear shaft, 2 tapered roller bearings and 1 sleeve. The screws clamp down on the sleeve. Loosening these screws will allow you to slide the "shaft assembly" in reducing your back lash if that is in case the problem. The problem that we used to have is that on the end of each shaft is a spanner nut that is held in place with a little keeper, thing (lack of any other name to call it). The little keeper thing kept breaking allowing the spanner nut to back off allowing the bearings to become all lose and care free causing the shaft to get lazy, fall out of place and not drive the bubble up auger. If it were my combine, I would pull the gear box, check the preload on the bearings to make sure they are tight, if you still have excessive slop in it try to move the shafts in. If that doesn't work hold on to your shoe laces. The bearings are not that expensive but the shafts are roughly $350 a piece around here. Good luck and I will try to check back on this thread, I may have an old TR manual (maybe TR70 maybe 75 after that dealer moved and I jumped brands) around that I could scan and email to you.   [Reply]   [No Email]
IAGary 09-28-2009 19:02:05 216.51.225.11 33384 Report to Moderator	Re: TR70 bubble up auger gearbox in reply to timmis, 09-28-2009 18:06:27   Are you sure it's the gear box and not the spleened bell on the bottom of the auger that sets on the shaft coming out of the gear box? I'm betting on the spleens on the end of the auger. Gary   [Reply]   [No Email]
Timmis 09-28-2009 19:28:05 207.199.212.52 33386 Report to Moderator	Re: TR70 bubble up auger gearbox in reply to IAGary, 09-28-2009 19:02:05   I'm pretty sure its the gearbox. It's got backlash and feels like the bearings are really lose letting the shaft slop around alot.   [Reply]   [No Email]