Applications: Underwater operations span a wide range of construction work in the marine environment. These applications include removal of a pier base, concrete removal, bed rock for construction, or lowering river's bed to a specific depth Production During Under Water Operation: Hammer operation in under water applications significantly lowers production. Low visibility can cause misalignment between the tool and the object. This leads to unnecessary idle strokes. Repositioning the hammer lowers production. Hammer's service interval must be reduced by 50 % of the normal scheduled maintenance for underwater applications.
			See the underwater hammer opeartion video here

Air System Operating Principles: The air system provides pressurized air to the area of impact between the piston and tool. The air pressure prevents water from entering the hammer and the hydraulic oil. If water is allowed to fill the space between the piston and the tool, a strong pressure wave is generated by the piston's acceleration downward. The piston can force trapped water upward past the wiper and oil seals into the hammer. The hammer and carrier's hydraulic circuit will become contaminated with water. 

Daily Maintenance: 

• At the end of each working day, operate the hammer for several minutes on a dry surface. This operation will purge trapped moisture from the hammer's front head.

• Remove the retaining pin for the hammer tool. Remove the hammer tool and remove any burrs. Check the hammer tool in order to ensure the proper application of grease.

• At the end of each working day, remove the hammer tool. Spray the tool bushings and the piston with an oil that will disperse the water.

• Rinse the hammer after operating in salt water. Then proceed with the daily maintenance instructions