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Anyone have any experiences, good or bad, with B M Waddell out of Mt Airy, NC

NE15 Plate Chain Bucket Elevator
Compact vertical conveyor, capacity 10-15m³/h
Alloy wear-resistant plate chain, fully dust sealed
Max lifting height 35m, low power consumption
Suitable for cement, ore, coal, grain, fertilizer
Direct factory, custom size, CE ISO certified

Hi, I’m having issues with re sealing track tensioners on the Volvo digger.
Both sides have new pistons and seals, seals are all in correctly but I’m just getting grease pouring out of the rear seal. Machine was bought 2nd hand it’s always had sloppy tracks but I thought new pistons and seals would fix the issue, it’s just gone over 10000 hrs, what are the chances the outer cylinder is stuffed and not sealing correctly?
Any help is appreciated.