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4. Air pressure and hose dimensions
Air pressure
Ensure that the compressor can deliver the required air pressure of 5 bar at the
machine. Measure the pressure close to the inlet nipple when operating the pick
hammer.
h High pressure (>5 bar) causes rough operation and damage.
h Low pressure (<4 bar) results in a slow breaking speed.
Air hose dimensions
The air hose diameter must be no less than 19 mm. The ideal overall air hose
length is less than 15 m.
5. Prevent freezing
In low ambient temperatures, ice can form in the machine. This can be avoided if
the water in the compressed air is removed. This can be done by equipping the air
line with an in-line water separator.
If the pick hammer ices up, it must not be heated to melt the ice. Let the ice thaw at
room temperature.
Never pour methylated spirits or similar substances into the pick hammer, as they
will interfere with the lubrication and lead to increased wear.
Fitting the insertion tool
Before fitting the insertion tool
h To prevent an accidental start: switch off the air supply and disconnect the
machine from the power source.
h Check that the insertion tool shank is of the correct size and length for the chuck
used.
h The shank must be clean and the insertion tool must be in good condition.
h The suitable quenching hardness of the shank is HRC48-53. A harder end face will
cause piston damage and breakage of the end face of the piston. If the shank face
is too soft it will be easily deformed by the piston which will result in difficulty in
removing the insertion tool.
h The shank end face shall be flat and perpendicular to the axis.
h Remove sharp edges from the shank's end face. A rough shank surface will cause
premature piston failure.
h Inspect the insertion tool: A dull insertion tool will slow down the breaking speed
and overstrain the hammer mechanism.
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