NPK
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START-UP OPERATION
HAMMERS THAT ARE NEW, REBUILT, OR
HAVE BEEN INACTIVE
Before using a new hammer for the first time, the first time after rebuild, or a
hammer that has been inactive for a long period of time:
1. Check the nitrogen gas pressure.
The nitrogen gas pre-charge is factory checked before shipment. However, it is
recommended the pressure be checked before using the NPK hydraulic hammer for
the first time. See CHECKING THE GAS PRESSURE section for procedure.
2. At idle, raise the hammer off of the ground. Place hammer vertical and activate
the hammer circuit for 3 – 5 second intervals. Continue for an additional 3 – 4 times
to ensure that all the air has been purged from the hoses and hammer before first
use. Failure to do this could result in damage to internal components.
3. Place hammer firmly against material to be broken.
Operate the hammer in a vertical position for approximately 10 minutes at one-half
engine speed. Increase engine speed to three-quarters and continue operating at
this speed for another 10 to 20 minutes. Increase to full engine speed. Maintain
vertical position for the first hour of operation.
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