My "Rhinoceros" Chinese 1.2t mini excavator had a leaking shaft seal, i think it was shipped or stored dry and the shaft under the seal and inboard of the seal was rusty on the long boat trip or storage. when it was run the rust wore the seal down, in less than 50 hours it was losing a couple of literes of oil per day. I pulled the motor, cleaned up the shaft with some 2000 grit and replaced it with a seal i got locally, nearly 300 hours and no problem. Was a pain to get the right seal, the drive seal only sees the return line pressure in the Eaton motors so you don't need a high pressure seal but Eaton specs them so they can take the full pressure in case of a blockage on the return line.

I've been having an issue since day 1 with my h12. The machine drives fine when you first start it up, but once the hydro oil gets around 110f the tracks stop working independently. It has no problem driving straight, but i can't turn. The engine just revs and strains and i won't get any movement unless both tracks are moving the same speed and direction. After turning the machine off and letting it cool it works fine again. I just purchased the oil cooler kit and I'm hoping it helps. Any idea where this problem is coming from?

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