Rear Axle Seal Replacement
I would really like to thank "AGirlAndHerTractor" from our message board for this excellent write-up.
Now that you have the axle removed, you may take some time to remove any remaining gasket material from the differential housing. Once that is done you will want to clean the inside of the differential case including the hydraulic oil screen.
Next, put the axle on a workbench. You'll need to press the outer bearing off the shaft. I didn't have a puller with extra long arms, so I made something that worked just as well.
This jig is four 5" 3/8" threaded bolts with four washers and nuts. I'm careful to hold the bolt still while the nut is spun with a wrench. I guess you could spin the bolt but it might leave score marks on the axle. YMMV
The collar will still be lightly pressed on the shaft. A pry bar will pop it right off.
Here's the new seal and collar assembly that replaces the old parts:
First apply some grease to the seal:
And to the bearing surface on the shaft too:
I used a section of 2" PVC pipe to drive both the seal and bearing down on the axle.
Remember the washer that goes next to the snapring I mentioned earlier? Well that has to be tossed into the axle housing and put on the end of the axle shaft as it slides in. It won't fit through the housing if it's actually slid on the axle. Weird but once you see the housing this will make sense.
You may be tempted to bump the axle back in place and tighten the four flang bolts. Don't, you have to get the dog gear on first. I speak from experience:
Getting the axle and dog gear back in place is not easy since the inner bearing is lightly pressed into the housing, and tightly pressed on the axle. It wants to push off of the housing every you tap the axle in.
I don't have pictures here because I literally had my hands full with what I was doing. I got a porta-press from Harbor freight and used that to help push the dog gear and inner bearing back onto the axle and into the differential housing. If that last sentence sounds complicated that's because it is. You'll need the porta press, 10mm press attachment, and some spacers that will hold up to some pressure. Use extreme care here - not only for your own safety but you don't want to break anything. Go slow and know what you are doing in advance. Wish I'd taken pics of this stage but it was messy. You may find a better way of doing this.. if so, post reply with info.
Here's the left dog gear reinstalled.
Differential all cleaned up:
The last thing is to reinstall the PTO assembly and hydraulic cover. I won't list out step by steps for this.. just read through disassembly and basically reverse it.
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