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INSPECTION AND MAINTENANCE
1. FASTENERS
Inspect all fasteners and retighten as necessary.
HAMMER BRACKET BOLTS
MODEL
ft. lbs.
(Nm)
NPH-3500
220
(300)
NPH-4500L
400
(550)
2. WELDS
Check welds for cracks, repair as necessary.
3. TOOL AND TOOL BUSHING WEAR
Check the tool and tool bushing for damage, wear, or deformation on a weekly
basis. Replace the tool and/or tool bushing when wear exceeds the maximum
clearance limit.
tb1 Typical break from bending overload.
tb2 Bending overload due to excessive wear of the tool bushing.
tb3 Corner loading due to excessive wear of the tool bushings.
tb4 Bending overload from excessive prying or slant hammering.
tb5 Deformation from overheating by hammering in the same position for over 30
seconds.
tb6 Chipped due to wrong application or overheating by hammering in the same
position for over 30 seconds.
4. HOSES
Inspect the air hose for wear, damage, and/or hose abrasion.
5. LUBRICATION
During the start-up of the unit, the oil must be set to the max setting for lubrication of
the hammer. This will allow the hammer to receive the proper lubrication when first
operating the hammer. After the first 10 hours of operation, adjust the oil valve of
the line unit to no. 2, which is most suitable for normal work.
