For NOK Hitachi Excavator EX120-3 BW4528E Swing Gear Box Oil Seal, Expansion Valves & Parts - Amazon Canada
Hitachi Genuine Engine Oil - Hitachi Construction Machinery
Water Contamination of Swing Transmission
Rotary Swing Motor Assy for Zaix Hitachi 300/330/350 (Direct injection) , Gear Oil Injection Hydraulic Motor Rotary Motor/ Rotary Motor Head for Excavator Parts - China Swing Motor, Rotary Swing Motor Assy
Royal Purple High Performance Synthetic Gear Oil 75W90, 946-mL | Canadian Tire
I think your swingmotor is leaking a bit, 60 litres or so... in the ringgear housing - hitachi 200lc excavator : r/Justrolledintotheshop