There was my fault. Clearly. The allowed max load of the rear arms is 800Kg. The loader itself was 500Kg and the bucket of clay almost a tonn. I locked the rear diff to manage out the tractor from the dusty slope, then I forgot to release, and made a turn. Overladed, locked diff. The first thing what I noticed was the missing 4×4 down in my „garden” -forest-. No way out, it have to be repaired on site. Thank God, the weather was not so bad, there was no wind, and solid freeze. I created a shelter with a propane heater. The ground (some concrete and frozen soil) was covered with OSB tables. I feel myself like a gyros meat.
I push an endoscope camera to the rear diff house. It was shock. The crown gear moves separately from the diff case. It broke all the bolts, and pins.
It means that the whole rear part of the tractor has to be remove, part by part. Firstly the cabin, but it is appr. 300Kg and fragile. It wasn’t acceptable, so I released the official method, and switched to „reverse engineering mode”. Since the weather conditions wasn’t ideal (-18°C) I was able to work only 4-5 hrs. pro day. It take 3-4 days to remove everithing like 3 point hitch, hydraulics, brake rods to reach the axle housing.
When I removed the axle housing it was clear: the italian engineers gave me a second chance: every gear surface was unharmed, just the 6 bolts, and two pins was broke, and the connecting surface of the crown gear and the differential case. So the spare parts will be cheap(was 10euros).
Since there was an obliviusly good time to check and replace the bearings, and the axle lip seals I do them too. The most annoying part of the repair was the cleaning of the oil space. Since the hydrostatic transmission unit use this oil, I had to deep clean the fine metal dust from the oil reservoir. The temperature was significantly below 0°C, so I cant use any water-based cleaning method. The solution was 4 can of break cleaner.
It was a great adventure, but in real life, it takes more than a month to repair, and during this I cant remove the snow from my road.