... MORE HUMANIZATION, MORE PRACTICAL GRD800, different to most of chain or belt driven rollers on the market, is with a ... pump, fixed displacement hydraulic motor, stepless speed, easy to change direction. 55 Liters, corrosion-free water tank ... and vibration, eliminating regular maintenance and adjustments that chain driven rollers require. ModelGE-R800HGE-R800HCGE-R800DEnginePetrol, Honda GX390Petrol ...