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NPK GH12 - User Manual

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HYDRAULIC HAMMER
OPERATORS MANUAL
GH SERIES HAMMERS
GH7 GH18
GH9 GH23
GH10 GH30
GH12 GH40
GH15 GH50
© Copyright 2014 NPK Construction Equipment, Inc. www.npkce.com H050-9630G GH7 - GH50
Hyd Ham Operators Manual 4-14
"Use Genuine NPK Parts”
7550 Independence Drive
Walton Hills, OH 44146-5541
Phone (440) 232-7900
Toll-free (800) 225-4379
Fax (440) 232-6294

Table of Contents

Question and Answer IconNeed help?

Do you have a question about the NPK GH12 and is the answer not in the manual?

Summary

Safety

Safety Warning Levels

Defines DANGER, WARNING, CAUTION, and ATTENTION safety notice levels.

Decal Information

Details about NPK safety and operating decals and their placement.

Tool Sharpening and Debris Warnings

Crucial safety instructions regarding flying debris and tool sharpening methods.

Safety Precautions

General Safety Precautions

Important safety instructions for operation, gas handling, and parts usage.

Introduction

Manual Purpose and Scope

Outlines the manual's content for operating and maintaining NPK Hydraulic Hammers.

NPK Parts Recommendation

Emphasizes using only genuine NPK parts for repairs and replacements.

Carrier Machine Compatibility

Carrier Weight Guidelines

Provides recommended carrier weight ranges for different NPK hammer models.

Compatibility Cautions

Warns about the dangers of mismatched hammer and carrier weights.

Hammer Specifications

Performance Specifications

Details impact energy, frequency, weight, and tool dimensions for NPK hammers.

Hydraulic and Gas Specifications

Lists oil flow, operating pressure, relief pressure, and gas charge for NPK hammers.

Hammer Serial Number Location

Serial Number Identification

Illustrates and describes the location of the serial number on NPK hammers.

Hydraulic Installation

Hammer Lines Setup

Explains the typical routing of hydraulic pressure and return lines.

Hammer Control Valve Systems

Describes the two types of control systems used for NPK hammers.

Hydraulic System Maintenance

Contamination Prevention

Details critical steps to prevent contamination in the hydraulic system.

Hydraulic Oil and Filter Maintenance

Guides on changing filter elements and hydraulic oil for optimal performance.

Hydraulic Quick Disconnects

Quick Disconnect Use and Precautions

Advises on the use and precautions for hydraulic quick disconnects.

Quick Disconnect Precautions

Coupler Inspection and Seating

Details precautions for inspecting and using hydraulic quick disconnects.

Mounting Installation

Mounting Kit Components

Lists and illustrates the parts included in NPK mounting installation kits.

Hammer Mounting and Removal

Mounting to Carrier

Provides step-by-step instructions for attaching the hammer to the carrier.

Removal from Carrier

Details the safe procedure for detaching the hammer from the carrier.

Lubrication

Manual Greasing Procedure

Step-by-step guide for manually greasing NPK hammers.

Grease Intervals and Types

Grease Intervals

Explains how to determine grease intervals.

Correct Grease Recommendations

Details the correct grease to use.

Recommended Greases

Grease Brand and Manufacturer List

Lists manufacturers and brand names of recommended greases for NPK hammers.

NPK Hammer Grease Products

Grease Formulations and Part Numbers

Details NPK's specific grease formulations and part numbers.

Autolube Systems Explained

Introduces the automatic greasing system for reduced wear.

Autolube Grease Line Pre-filling

Pre-filling Procedure

Details the mandatory steps to prime the autolube grease line before use.

Autolube Line Priming Steps

Priming Steps Continued

Continues the pre-filling procedure for the autolube system, including pumping and connection.

Autolube Pre-filling Components

Pre-filling Assembly Parts

Identifies and describes parts used in the autolube grease line pre-filling assembly.

Lubricant Terms and Definitions

Lubricant Definitions Part 1

Defines key terms related to lubricants and their properties.

Lubricant Terms and Definitions

Lubricant Definitions Part 2

Defines additional terms like Reservoir, Vibration, and Viscosity.

Start-Up Operation

Initial Start-Up for New;Inactive Hammers

Outlines the procedure for starting new, rebuilt, or inactive hammers.

Pre-Operation Checks and Daily Start-Up

Pre-Start Inspections

Details pre-operation inspections.

Daily Start-Up Procedure

Details the daily start-up procedure.

Operation

Safe Operating Instructions

Provides critical safety guidelines for operating the hydraulic hammer.

Operating Techniques and Precautions

Techniques and Precautions

Offers key techniques and precautions for efficient hammer operation.

Hammer Angling and Force Direction

Angling and Force Direction Advice

Advises on aligning force direction and avoiding hammering at an angle.

Hammer Usage Precautions

Pry Bar and Continuous Hammering Cautions

Warns against using the hammer as a pry bar or hammering in one spot too long.

Operational Cautions

Dropping, Moving Objects, and Cylinder Stroke Cautions

Lists additional cautions regarding dropping, moving objects, and cylinder stroke limits.

Specific Operational Restrictions

Underwater, Hot Tool, and Boom Contact Restrictions

Details restrictions for underwater use, hot tool submersion, and boom contact.

Impact Energy Transmission

Energy Transfer Mechanism

Explains how hydraulic power is converted to kinetic energy and transmitted via stress waves.

Stress Waves at Tool End

Wave Behavior Description

Describes how compression and tensile waves behave at the tool's contact point.

Routine Inspection and Maintenance

Visual Inspection Points

Lists key areas for visual inspection, including fasteners, welds, hoses, and hydraulic oil.

Tool Lubrication and Wear Checks

Details demolition tool lubrication and checking tool/bushing wear.

Weekly Inspection

Inspection Checklist

Lists items for weekly inspection, including welds, retaining pin, tool, and gas charge.

Tool Types and Applications

Standard Demolition Tools

Describes Chisel, Moil, and Blunt tools and their applications.

Optional Demolition Tools

Describes the Core tool and its applications.

Tool Identification

Identifying Tool Markings

Explains how to identify NPK demolition tools using stamped numbers and photos.

Tools

Changing the Hammer Tool

Provides step-by-step instructions for removing and reinstalling the demolition tool.

Tool to Bushing Clearance Measurement

Clearance Measurement and Wear Analysis

Guides on measuring tool-to-bushing gap and tool diameter for wear.

Bushing Clearance and Replacement Criteria

Bushing Diameter and Replacement Criteria

Details measuring bushing inside diameter and criteria for replacement.

Chisel Tool Resharpening

Resharpening Dimensions and Procedure

Provides dimensions and procedures for resharpening chisel tools.

Standard NPK Tool Lengths

Tool Dimensions and Lengths

Lists dimensions for NPK tools, including diameter, total length, and working length.

Tool Retaining Pin Inspection

Retaining Pin Wear Inspection

Guides on inspecting the tool retaining pin for wear and damage.

Tool Inspection for Wear and Damage

Tool Wear and Damage Inspection

Details inspecting tools for deformation, chipping, and retaining pin issues.

Tool Warranty

Standard Tool Warranty Coverage

Outlines the 30-day warranty for demolition and accessory tools.

User and NPK Responsibilities

Defines user duties and NPK's responsibilities under the tool warranty.

Tool Failure Causes and Exclusions

Warranty Exclusions and Failure Causes

Details common causes of tool failure and specific exclusions from warranty.

Tool Breakage

Breakage from Excessive Bending Moment

Analyzes tool breakage caused by bending, its characteristics, and prevention.

Breakage from Worn Tool Holder Bushings

Worn Bushing Breakage Analysis

Explains how worn bushings lead to tool breakage and damage.

Preventative Measures for Bushing Wear

Bushing Wear Prevention

Advises on replacing tool holder bushings to prevent breakage.

Chipping and Deformation in Retaining Pin Area

Retaining Pin Area Damage

Details chipping and deformation of tools at the retaining pin slot.

Deformation of the Tool Tip

Tool Tip Deformation Causes

Explains how continuous hammering in one spot can deform the tool tip.

Chipping of Moil and Chisel Tool Tips

Moil and Chisel Tip Chipping

Covers chipping on moil and chisel tips due to application or overheating.

Temperature-Related Tool Problems

Low;High Temp and Slant Hammering Issues

Discusses issues caused by low or high temperatures and excessive slant hammering.

Breakage Due to Corrosion and Defective Material

Corrosion and Defective Material Breakage

Explains how corrosion and defective material can cause tool breakage.

Torque Values for Hammer Fasteners

Socket Head Cap Screw Torque

Lists torque values for socket head cap screws in various hammer components.

Hex Head Bolt Torque

Lists torque values for hex head bolts used in hammer brackets and mounts.

Hammer Bracket Fastener Torque

Bracket Bolt Torque Values

Specifies torque values for hammer bracket bolts, noting reductions in L2.

Gas Charge

Nitrogen Gas Pressure Specifications

Details nitrogen gas pressure requirements at ambient and operating temperatures.

Gas Charging Kit Components

Lists the parts included in the NPK gas charging kit.

Checking the Gas Pressure

Procedure for Checking Gas Pressure

Step-by-step guide to check the nitrogen gas pressure in the hammer.

Completing Gas Pressure Check

Finishing Gas Pressure Check

Details finishing the gas pressure check and comparing readings.

Charging the Hammer

Procedure for Charging the Hammer

Step-by-step guide for charging the hammer with nitrogen gas.

Completing Hammer Charging

Finishing Hammer Charging

Details the final steps for removing the adapter and replacing the cap after charging.

Discharging the Gas Pressure

Procedure for Discharging Gas Pressure

Step-by-step guide for safely discharging nitrogen gas pressure from the hammer.

Warranty Registration

How to Register New Units

Provides instructions for registering new NPK units via mail, fax, or online.

Storage of Hydraulic Hammer

Storage Procedures

Details recommended steps for storing the hydraulic hammer for short and long terms.

Warranty Statements

Limited Warranty Coverage

Outlines the 3-year limited warranty for boom mounted hydraulic hammers.

Warranty Responsibilities and Exclusions

Details responsibilities, exclusions, and limitations for NPK warranties.

Replacement Parts Warranty

90-Day Replacement Parts Warranty

Covers the 90-day warranty for NPK replacement parts.

Autolube System Warranty

Autolube System Warranty Details

Details the base and extended warranty for NPK Autolube systems.

Notes and Records

Record Keeping Fields

Provides fields for recording hammer, kit, and carrier information, and inspection dates.

NPK GH12 Specifications

General IconGeneral
BrandNPK
ModelGH12
CategoryTools
LanguageEnglish

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