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Re: 300 progress (a little)

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D Slater

01-27-2013 19:41:44

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Zach you can use the transmission input shaft with bearing cage put in the front transmission housing opening to hold the main shaft at the front. Put the piliot bearing on the main shaft first. When checking a pattern, turn the pinion shaft and put some drag on the ring gear. That way the pinion shaft will try to shift forward as much as the ball bearing lets it. If turning the ring gear with drag on the pinion shaft, shaft will shift rearward a few thousands. Check pattern with pinion shaft trying to move forward. Differential bearing support housings have the oring thats kind of costly. may want to leave the orings off until the final assembly. If the differential bearings don't get to tight use the right support housing in or out to get the pattern you want (may also have to adjust pinion shaft if off) and that should be near the backlash gears had when removed. Put that on a paper if you found it. If the differential bearings are getting squeesed when adjusting the left support will need a shim or shims added. After you have the gear pattern or adjustment wanted, shim the left differential bearing support so you have a .010 to .020 shift or play on the differential from side to side.

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Zachary Hoyt

01-28-2013 13:46:19

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 Re: 300 progress (a little) in reply to D Slater, 01-27-2013 19:41:44  
Thank you very much for the detailed advice. I tried putting the input shaft in place but I found that there was still about the same amount of play on the main shaft since there was only one bearing on each shaft that was anchored in the housing. I went ahead and put the TA back in the housing and got it moved back over by the tractor and tomorrow I will put it in place and see what the pattern is. I have not been able to find a way to remove the bull gears or the bull pinion carriers separately on the 300, I seem to have to unbolt the carrier, slide the axle out of the bull gear and then rotate the carrier toward the front of the tractor so I can lift the bull gear out and then slide the carrier out. On the Hs I have had apart I could remove the axle and then roll the bull gear back to allow the carrier to slide out, but there doesn't seem to be room on the 300. Zach

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D Slater

01-28-2013 16:37:56

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 Re: 300 progress (a little) in reply to Zachary Hoyt, 01-28-2013 13:46:19  
Not to sure about things. Is that the replacement ring gear in the picture or the old one? Axle housings can stay on but the axles need moved part way out of the housings. At least past the bull gear splines. Then the bull gears need moved to let the differential bearing support housings come out each side. May have to remove the PTO to get the bull gear out. Never tried to move a bull gear with the pto in, so can't say for sure. Don't think so though. Leave the bull gears out of the way until the differential is shimed where you want. You can try to get by with just the right axle and bull gear moved. But if the other side ends up needing shims added or subtracted the left axle and bull gear will have to be moved. If you assemble the t/a unit and get a helper or some other support to hold it in the front transmission housing hole it will line the main shaft up okay. Putting the t/a and center housing on may be the best but if you need to add or subtract shims on the main shaft the t/a needs removed. Unless you cut the shims to remove or install. Some have done that. Since you have the original main shaft bearing, bearing housing and shims with the shaft. High % of the time it will be good in another housing. Good Luck.

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Zachary Hoyt

01-28-2013 19:37:52

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 Re: 300 progress (a little) in reply to D Slater, 01-28-2013 16:37:56  
Thank you very much. I had wondered about cutting shims but had thought that maybe that would be a sin. I have had both axle housings off to clean and I replaced one gasket that had been leaking. The ring gear is the one that you sent. I have had everything out of the case and cleaned it all out with kerosene and now have begun to put things back. I will post another picture tomorrow once I get the TA housing back on and check the gears. I am hoping that the ring and pinion will line up, but if not I can always take the housing off again. I found that putting the TA back together went a lot faster this time than the first time I did it.

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