NPK E Series - Page 3

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IMPACT STRESS WAVES AT THE END OF THE TOOL ........................................ 42
TOOL BREAKAGE ........................................................................................................ 43
TOOL BREAKAGE DUE TO EXCESSIVE BENDING MOMENT .............................. 43
CHARACTERISTICS OF THE BROKEN SECTION ................................................. 43
TOOL BREAKAGE DUE TO EXCESSIVE WEAR OF THE TOOL HOLDER
BUSHINGS ............................................................................................................... 44
CHIPPING IN RETAINING PIN SLOT ...................................................................... 46
DEFORMATION OF THE RETAINING PIN SLOT SIDES ........................................ 46
DEFORMATION OF THE TOOL TIP ........................................................................ 47
CHIPPING OF A MOIL POINT TOOL TIP ................................................................ 48
CHIPPING OF A CHISEL TOOL TIP ........................................................................ 48
TEMPERATURE RELATED TOOL PROBLEMS ...................................................... 49
TOOL BREAKAGE DUE TO CORROSION .............................................................. 50
TOOL BREAKAGE DUE TO DEFECTIVE MATERIAL ............................................. 50
ROUTINE INSPECTION AND MAINTENANCE ............................................................ 51
WEEKLY INSPECTION ................................................................................................ 52
TYPES AND APPLICATIONS OF TOOL ...................................................................... 53
STANDARD TOOLS ................................................................................................. 53
ACCESSORY TOOLS .............................................................................................. 53
TOOL IDENTIFICATION ............................................................................................... 54
TOOLS .......................................................................................................................... 55
CHANGING THE TOOL ............................................................................................ 55
MAXIMUM TOOL TO TOOL BUSHING CLEARANCE ............................................. 56
TOOL INSPECTION ................................................................................................. 58
CHISEL TOOL SHARPENING .................................................................................. 59
STANDARD LENGTH FOR NPK TOOLS ................................................................. 60
TOOL RETAINING PIN INSPECTION ...................................................................... 61
TORQUE VALUES FOR HAMMER FASTENERS ........................................................ 62
GAS CHARGE .............................................................................................................. 63
NITROGEN GAS PRESSURE .................................................................................. 63
GAS CHARGING KIT ............................................................................................... 63
CHECKING THE GAS PRESSURE .......................................................................... 64
CHARGING THE HAMMER ...................................................................................... 66
DISCHARGING THE GAS PRESSURE ................................................................... 67
STORAGE OF HYDRAULIC HAMMER ........................................................................ 68
WARRANTY REGISTRATION FOR NEW UNITS ........................................................ 69
TOOL WARRANTY ....................................................................................................... 70
WARRANTY STATEMENTS ......................................................................................... 72
NOTES AND RECORDS .............................................................................................. 76