ROUTINE INSPECTION AND MAINTENANCE
1. VISUAL INSPECTION
Detect a potential problem early.
TIE RODS AND FASTENERS
Inspect all fasteners and retighten as necessary. On E200 through
E205 models, inspect tie rod assemblies for loose top nuts. On the
E207 model, inspect tie rod assemblies for cracked or missing lock
plates and lock rings. If these parts are missing, consult the NPK
Service Department at 440-232-7900. See page 62 for torque values.
WELDS
Check for cracks, repair as necessary, see page 52.
HOSES AND TUBING
Check for oil leaks, loose clamps and hose abrasions.
RUBBER MOUNTS Inspect for damage.
HYDRAULIC OIL
MAINTAIN A CLEAN HYDRAULIC SYSTEM
If non-petroleum oil is used, contact the NPK Service
Department for compatibility. Keep hoses clean and
capped when dismounting or storing hammer. Change
oil and filters as recommended by carrier manufacturer.
Periodic oil sampling is recommended.
2. DEMOLITION TOOL LUBRICATION
Important:
It is imperative that grease is always maintained in the tool bushing contact area at all
times. This may require hourly greasing depending on job conditions.
Important:
The hammer must be in a vertical position with downforce applied to push the tool all
the way in. This prevents grease from entering the piston impact area. Pump grease
into grease fitting (30) until grease is seen coming out between the tool and
bushing. USE A GOOD QUALITY, HIGH TEMPERATURE EP#2 GREASE
CONTAINING ANTIWEAR ADDITIVES. NPK recommends a Lithium Base, Moly
(Molybdenum Disulfide) or other surface protecting additives, EP (Extreme
Pressure), NLGI #2 Grease. A high drop point (350° to 400°) grease is desirable.
If machine is equipped with an Auto Lube System, check grease reservoir daily.
3. TOOL and TOOL BUSHING WEAR.
Check the tool and tool bushings for damage, wear or deformation on a regular weekly
basis. Replace the tool and/or bushings when wear exceeds the maximum clearance
limit. See “MAXIMUM TOOL TO TOOL BUSHING CLEARANCE”.
Do not hardface or sharpen the tool point with a cutting torch. Excessive
heat from torching or welding causes embrittlement, breakage, and flying
pieces. Sharpen only with a lathe or milling machine using sufficient
cooling. Please consult your authorized NPK Dealer or NPK Service
Department for additional information.
• DO NOT SUBMERGE HAMMER UNDERWATER
Unless modified for underwater operation. Consult NPK Service at 440-232-7900 or
see “UNDERWATER MANUAL” for instructions.
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