... prohibited on-load open, barrier gate.3. Motor can never exceed the load (110%); accelerate, deceleration ... when machine stop, (that is to say can not change speed), Otherwise, easy to damage stepless gearbox ... in chains, bearings, cylinder stroke, and change oil regularly in worm gear reducer to ensure ... factory, non-professionals is strictly prohibited to change, set, disassembly and repair. YA-02BC2 ...