... wheel when machine stop, (that is to say can not change speed), Otherwise, easy to damage stepless gearbox.6. Keep ... on stepless gearbox, motor belts, often add oil in chains, bearings, cylinder stroke, and change oil regularly in worm gear reducer to ensure ... before leaving the factory, non-professionals is strictly prohibited to change, set, disassembly and repair. YA-02BC2 Leather Machine for ...