1. Gradually move forward and break down Gradually move the impact point from the edge to the inside. Do not try to break the larger block at a time. If it cannot be broken within 30 seconds, it should be broken in several times. When crushing a particularly hard object, start at the edge and do not strike for more than one minute at the same point to prevent the drill rod from burning or the hydraulic oil from overheating.
5. To prevent blank fire When the broken object has been broken, immediately release the breaker operating pedal to stop the hammer. Otherwise (between the drill rod is not fixed) between the piston and the drill rod, between the drill rod and the drill rod pin, the impact between the drill rod pin and the front sheath, so that the drill rod, the drill rod pin, the front sheath Damaged.