Posted by slcullen on December 06, 2013 at 12:04:07 from (98.230.29.61):
Season's greeting ladies and gentlemen. My 8N has a two inch hairline crack in the bottom of differential case and is leaking excessively. It's not pouring, but much more than I want on the shop floor. At first I thought it was the PTO seal, but cleaning it up has revealed the hairline crack. It begins right were the differential case bolts to the axle housing.
After scratching my head about fixes, it seemed to be three choices: J B Weld as the easiest, after draining the hydraulic fluid, and cleaning the surface; getting the crack brazed,; and lastly, swapping the rear end out of another 8n, to which I have access.
So I decided to take the easiest rout first, the J B Weld. After applying it and letting it cure for 24 hours under a 60-watt bulb, I refilled the fluid chamber and let it sit overnight. No leaks, so I fired it up and drove it around, after going through about 20 cycles of the lift arm. Every thing seems to be OK and so far no leaks. Any thought on how long this “repair” is going to last or suggestions for a more lasting repair? Thank, Spencer in Tallahassee
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