NPK PH4 - Tool Retaining Pin Inspection

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TOOLS

TOOL RETAINING PIN INSPECTION

Deformation may occur on the retaining pin in the tool contact area (AN). If this area is

mushroomed, the retaining pin may become difficult to remove. Dress areas shown

(AN) with a grinder.

Table of Contents

Table of Contents2
Safety4
Introduction6
Carrier Machine Compatibility7
Hammer Specifications8
Structure9
- Structural Drawing9
Hammer Serial Number Location10
- SERIAL NUMBER LOCATION (Sn1)10
Hydraulic Installation11
- Prevention of Contamination13
- Hydraulic Quick Disconnects14
Mounting Installation16
- Removal from the Carrier16
- Removal from the Skid Steer17
- Mounting to the Carrier17
- Mounting to the Skid Steer17
Lubrication18
- Greasing Procedure18
- Correct Grease and Grease Intervals19
- Correct Grease for Hydraulic Hammers20
  - Npk Hammer Grease20
  - Auto Lube Systems20
- Auto Lube Grease Line Pre-Filling21
- Hammer Mounted Auto Lube Grease Line Pre-Filling24
Lubrication26
- Lubricant Terms and Definitions26
Start-Up Operation29
- Hammers that Are New, Rebuilt, or Have Been Inactive29
- Before Starting the Hammer30
- Daily Start-Up Procedure30
Operation31
- Operating Techniques & Precautions32
Impact Energy Transmission through Tools37
- Impact Stress Waves at the End of the Tool38
Tool Breakage39
- Tool Breakage Due to Excessive Bending Moment39
- Tool Breakage Due to Excessive Wear of the Tool Holder Bushings40
- Chipping in Retaining Pin Slot42
- Deformation of the Retaining Pin Slot Sides42
- Deformation of the Tool Tip43
- Chipping of a Moil Point Tool Tip44
- Chipping of a Chisel Tool Tip44
- Temperature Related Tool Problems45
- Tool Breakage Due to Corrosion46
- Tool Breakage Due to Defective Material46
Routine Inspection and Maintenance47
Weekly Inspection48
Tools49
- Standard Tools49
- Accessory Tools49
- Tool Identification50
- Changing the Tool51
- Maximum Tool to Tool Bushing Clearance53
- Tool Inspection55
- Chisel Tool Resharpening56
- Standard Length for Npk Tools57
- Tool Retaining Pin Inspection58
Gas Charge60
- Nitrogen Gas Pressure60
- Gas Charging Kit61
- Checking the Gas Pressure62
- Charging the Hammer64
- Discharging the Gas Pressure65
Storage of Hydraulic Hammer66
Warranty Registration for New Units67
Tool Warranty68
Warranty Statements70
Notes and Records74

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