TM 5-3805-281-24-2
Hydraulic Impact Breaker
33
SPECIAL WORKING FREQUENCY
69
WHEN BLOW RATES NEED TO BE CHANGED
In certain cases, such as block breaking (i.e. quarry) or
piling work, variable frequencies are
unnecessary/counterproductive. In these cases, the speed
valve (4) may be removed from the hammer and replaced
with a pin valve. The breaker is then operated at
maximum power, and can be calibrated at a fixed
pressure and constant rhythm.
Alternatively, the variability valves can be completely
eliminated and the head hole can be sealed with a gas
plug. It is also possible to operate the hammer as
semi-automatic, by removing the spring (3), needle (2),
and barrel (5) from the needle/piston (2).
Continued on next page
CED,OUOE012,168 1920MAR991/2