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109 diff assembly.
Is there only 4 bolts holding that assembly in frame??
Are they all the same length?? In particular the left rear one?? The reason I ask, is the other day, I happened to notice a loose bolt. Upon further investigation, I found there was no bolt in left rear. Checked other side. Front bolt tight, rear loose. Removed the loose one, went and got grade 5 bolt. Tried to put bolt in LR, and found it seem bolt is broken off about an inch in. :bash2: Before I go drilling for easy out I want to make sure I'm not drilling the casting. Service manual isn't clear on this. |
IIRC, there are six (6) bolts [3 on each side], that go through the frame to the Axle Tube Housings. Then, there are two (2) brackets [four bolts] that aid in the anti-rocking action and for additional support.
If you go to the Parts Manual for your model, you will see that they (6) are different lengths. IIRC again, I believe they are all Grade 8 bolts. |
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Roger 3 on each side
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Thanks Roland and Sam.
I see all 6 bolts now, but the rear one on left side has presented a problem. If I follow the parts correctly, they are only 1 inch bolts on that side. If so there are no threads there at all---gone. BTW according to markings on the existing bolts they are grade 5, just 3 lines. So now, it's a helicoil, or drill holes larger, and rethread. Unless there are alternate suggestions. |
I had a few broken bolts on my 1450. I went the extra route and pulled the rear end out of the tractor. Pulled the Axle housing(s). and removed the broken bolt. Once I had all the correct bolts and gaskets, I re-assembled everything. All is good.
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I would pull it and do as Roland suggested but if it's only the rear one you can pull the cover and put a rag over the bolt hole to catch any drill chips. That hole is between the diff carrier and the cover. The pic is from a later aluminum case but the arrow points to where the bolt comes into the case.
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I had a more severe version of that problem with my 1440, (had 3 broke off). I pulled the entire rear end out, and was able to get the busted off bolts out with heat and ez-outs. There was some wallering out of the holes on the frame so i put the bolts back in with washers and welded the washers to the frame to take up the slop.
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OK, so here is what I did for temporary patch up.
There are NO threads left in the casing. So, I used a sliver of aluminum sheet cut about 1/4 inch wide, and in inch long, bent a tad to shape to hole. I tapped, with a small hammer, the bolt just a bit to get started, and low and behold it threaded in. I snugged it but didn't dare torque it up. Seeing as how that bolt has been out quite some time by looks of it, that should hold it until I get one of the other tractors mobile again. There shouldn't be hard stress work again this winter. Once I get the 1450 up and running, then I will drop the assembly from the frame and do a more substantial repair. Thinking of heli-coiling. That should be permanent repair. BTW I pulled the same bolt from 1450(don't know why I didn't think of that before) and the threads are not real healthy in it either, but it did thread back in and took a good torque, so should be ok. I will keep an eye on them from now on. |
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