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5.11. Inspection after installation
After the hammer has been installed on the carrier and set ready to operate, installation inspection must be
carried out. Check inspection items and specifications as follows:
The
oil flow supplied to the hammer;
should be measured from the ‘IN’ line with a flowmeter while operating the hammer. As alternative, oil flow
can be measured, without hammer operating, using a flowmeter that has a throttle valve, which set to the
operating pressure of the hammer.
The
operating pressure of the hammer;
should be measured as close to the hammer ‘IN’ port as possible.
Note: The oil flow and the operating pressure should be measured in minimum and maximum values
because those fluctuate slightly while operating the hammer.
The
relief pressure of the hammer piping;
should be measured with the stop valve shut off. And, it must be set to 30~40 bar higher than the
measured maximum operating pressure of the hammer.
The
prefill gas pressures in the back-head gas chamber and the accumulator;
must be measured statically, the hammer not operating, at the ambient temperature before operating.
Refer to Section “
7.5. Gas
” for details about measuring the gas pressures.
The
impact rate;
can be measured if a blow frequency counter is available. It is highly recommended to measure the
impact rate.
Refer to Section “
4. Technical specifications
” for given limits of the specification.
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