**Guidelines for hydraulic hammer chiselAcquisition**
1.1. Grooved chisel: Devised for unearthing and trenching of various pliable and neutral stratified stones.
1.2. Cruciform chisel: Optimal for pulverizing granular, neutral concrete and pliable, non-stratified stones.
1.3. Planar chisel: Beneficial for shattering semi-hard stones or breaking down pebbles to diminish their dimensions.
**Substitution Process for chisels**
2.1. Initiate by disengaging the stopper pin and the elongated 330mm chisel pin. During reassembly, situate the chisel pin perpendicularly and engage the chisel pin.
2.2. When retrofitting the chisel, progress inversely to the disassembly sequence, commencing with an examination for wear and tear or damages. If the chisel exhibits deformation, it warrants sharpening and rectification, followed by smearing of lubricant on the chisel pin and the operative components of the chisel before its installation. A severely deformed chisel pin complicates chisel substitution. Hence, ensure a periodic check after every 100-150 operational hours.
**Direction of chiselImplementation**
The alignment of the chisel and the forearm must be identical, and the chisel should ideally be as perpendicular as possible to the rock surface under operation. A deviation from the perpendicular might result in the iron rod skidding during work. Prior to breaking, align the chisel meticulously, then choose a stable point of impact on the rock to execute the impact operation.
**Operation Points to Heed**
4.1. Applying the right amount of downward pressure boosts the breaker’s effectiveness.
4.2. Vary the breaker’s position when the rock is immune to its impact. Shift to a new operational point.
4.3. Avoid repetitive operations at the same spot, which escalates the chisel’s temperature, reduces its hardness and results in the bottom end of the chisel curling upwards, thereby diminishing operational efficiency.
4.4. Refrain from using the chisel as a pry bar.
4.5. Underwater operations are strictly prohibited without suitable equipment: Any part of the hydraulic breaker should not be immersed in water until underwater operation equipment is deployed; when operating the breaker in water, ensure the configuration of suitable underwater apparatus and an air compressor capable of generating 6000LPM/150PSL. (Remember: Undertaking underwater operations without the required equipment and air compressor might inflict damage to the breaker’s internals.)
4.6. Prior to vacating the equipment, lower the forearm to ascertain the equipment’s safety status; on engine ignition, it is imperative to remain with the equipment. All brakes and locking systems on the equipment must be put into action effectively.
Persistent use of the chisel can lead to deformation and curling at the lower part. Wear at the chisel’s tip could result in slipping. In such cases, honing the tip of the chisel is warranted. Frequent grinding, however, reduces the hardness of the chisel. If the gap between the chisel and the guide sleeve is overly wide, it prevents the piston from hitting the chisel accurately, thereby causing damage. If the spacing surpasses 9mm,it is necessary to substitute the chisel and guide sleeve.