NPK PH4 - Structure; Structural Drawing

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- 8 -

STRUCTURE

STRUCTURAL DRAWING

MODELS PH1 – PH4

30 GREASE FITTING

A MAIN BODY

BB PLUNGER

D RETAINING PIN

E RETAINING RING

G TOOL BUSHING

HH TOOL

L GAS HEAD

M CHARGE VALVE

N PISTON

O MAIN BODY SLEEVE (A)

P MAIN BODY SLEEVE (B)

Z VALVE SPOOL

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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