hydraulic hammer operators manual
Contents
1. DO NOT ALLOW THE HAMMER TOOL TO HIT THE BOOM Use caution when tucking the hammer in tight to the boom for transportation 25 ROUTINE INSPECTION AND MAINTENANCE 1 VISUAL INSPECTION Detect a potential problem early FASTENERS Inspect all fasteners Retighten as necessary See page 34 for torque values WELDS Check for cracks repair as necessary HOSES AND TUBING Check for oil leaks loose clamps and hose abrasion HYDRAULIC OIL MAINTAIN A CLEAN HYDRAULIC SYSTEM If non petroleum oil is used contact 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 t is imperative that grease is 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 down force applied to push the tool all the way in This prevents grease from entering piston impact area Pump grease into hammer until grease is seen coming out between the tool and tool bushing see page 13 USE A GOOD QUALITY HIGH TEMPERATURE EPZ2 GREASE CONTAINING ANTI WEAR ADDITIVES SEE PAGES 13 14 and 15 If machine is equipped with an AUTOLUBE System check grease reservoir daily 3 TOOL and TOOL BUSHING WEAR Check the tool and tool bushings fo2. CONSTRUCTION EQUIPMENT WALTON HILLS OHIO U S A 43 STORAGE OF HYDRAULIC HAMMER For short term storage between jobs place the hammer horizontal on wood blocks 120 Be sure tool is liberally greased and the hydraulic hoses are capped AC Cover with a waterproof tarp t21 not shown H H 00273 If the NPK HYDRAULIC HAMMER is not to be used for a long period of time months it is recommended the gas pressure be discharged M The tool HH should be removed and the piston pushed all the way in Be sure the hydraulic hoses are plugged and grease the exposed end of the piston N Grease and reinstall the tool Cover with a waterproof tarp t21 not shown 44 NOTES AND RECORDS NPK HYDRAULIC HAMMER MODEL NUMBER SERIAL NUMBER NPK INSTALLATION KIT NUMBER DATE OF INSTALLATION DATE OF 20 HOUR INSPECTION WARRANTY REGISTRATION SENT U 45 7550 INDEPENDENCE DRIVE WALTON HILLS OHIO 44146 PHONE 440 232 7900 FAX 440 232 6294 Copyright 2009 Construction Equipment Inc www npkce com 50 9640 03 09 doc 03 09
3. NPR HYDRAULIC HAMMER OPERATORS MANUAL GH SERIES HAMMERS GH06 GHS2 GHO GH3 GH1 GH4 GH2 GH6 Use Genuine NPK Parts E 7550 Independence Drive PAES Walton Hills 44146 5541 attachments Phone 440 232 7900 designed built Toll free 800 225 4379 and backed by NPK Fax 440 232 6294 Copyright 2009 Construction Equipment Inc www npkce com H050 9640A 03 09 doc 03 09 CONTENTS SARET GAM er a AGA MEME EINE MI ME UEM DICE MM C 2 Js E Gi itm 4 CARRIER MACHINE COMPATIBILITY sees 5 HAMMER SPEGIFIGATIONS 55555505 5 na a pn a aa D a E a ga a a a A a a a ga aaa 6 HYDRADLIG INS PALLA TION scassussseasseaneuessvaneanstunetuasiaesteanteansuastunsteantuasieoniuatuanteasteasiens 7 PREVENTION OF CONTAMINATION aga aga pang a pa a an aa alana UN 8 HYDRAULIC QUICK 5 rn 9 MOUNTING ING TALLATION anaa aana aaa aaa aaa e eiu bas eere aan dui eee 11 Wisi C WHO qe C MM 12 GREASING PROCEDURE pub t eae aa aa a a a 12 CORRECT GREASE AND GREASE INTERVALS eee 13 NPK HAMMER GREASE aaa aa aa testas oh She ded 15 AUTOLUBE SYSTEMS Dru uk SOS nues EU s t 15 LUBRICANT TERMS AND DEFINITIONS eeeeeneenmmmHeem 16 STABTSUP OPERATI usati due M aee aa nana ana Nea e bera ed aan staged UP tee a 18 HAMMERS THAT
4. M10 MODEL HAMMER BRACKET ADAPTER BRACKET BOLT TORQUE BOLT TORQUE ft Ib Kr EA ft Ib n T 1 500 678 165 225 500 678 165 228 a Dl Oe LGH2 GHS2 1 500 678 5 8 165 225 _ GH3 1 1 4 1000 1356 5 8 165 225 _ 1 1 2 1250 1695 5 8 165 225 _ GH6 t 1 2 1250 TU EIE 2394 GAS CHARGE NITROGEN GAS PRESSURE The nitrogen gas pressure must be measured with no preload on the tool Remove the tool or position the hammer with the tool fully extended against the tool retaining pin The hammer must not be resting vertical on the tool The gas pressure in the hammer will vary according to the gas temperature PREFERRED METHOD The preferred method to measure or charge the nitrogen gas pressure is with the hydraulic system temperature stabilized at maximum operating temperature The chart showing values for Operating Temperature should be used see below ALTERNATE METHOD The nitrogen gas pressure can be measured or charged at ambient temperature cold before operating the hammer See the chart Ambient Temperature below ATTENTION DO NOT OVERCHARGE THE HAMMER Exceeding the gas pre charge specifications can result in damaging hammer components The NPK WARRANTY does not cover failures resulting from exceeding the specified nitrogen gas pressure NITROGEN GAS PRE CHARGE AT AMBIENT TEMPERATURE cold before operating AT OPERAT
5. DISCHARGING THE GAS PRESSURE PROCEDURE AA CAUTION Remove the valve cap only not the charge valve assembly 5 Tighten the charging 6 adapter cap g6 HAMAO00030 Turn the T handle g2 clockwise As the handle is screwed in a resistance IS encountered By turning the T handle g2 further the nitrogen gas pressure Will be indicated on the pressure gauge 08 Stop turning the T handle when the gauge 9 Remove reads pressure Do not over tighten 44 Loosen the charge adapter cap g6 VERY SLOWLY The gas pressure will gradually decrease zero then REMOVE THE CAP Remove the charge adapter 91 from the hammer NPK adapter part no 30604100 10 Install existing plug WARRANTY REGISTRATION FOR NEW UNITS Complete and send to NPK after installation or complete on line at www npkce com Online warranty registration can be done by the dealer or the end user The registration can be done in any of the following ways 1 Mailed to NPKCE 7550 Independence Dr Walton Hills Ohio 44146 2 Faxed 440 232 6294 U S 41 440 232 6294 outside U S 3 Completed on line at www npkce com The online registration can be done by the dealer or the end user Dealers e Inthe tool bar click on DEALERS Using your user name and password log into the system At the left of the next page click on REGISTRATION Complete the fields with an orange diamond next to them A
6. Slag removal HAMA00158 OPTIONAL TOOL Concrete breaking CORE PC Highway construction for GH6 General demolition 00156 ACCESSORY TOOLS FROST CUTTER e Edge of trenching Cross cut SX In Line SY Ss e Frost cutting for GHO7 thru GH4 TOOLO00039 ADAPTER TOOL For attachments listed for GHO7 thru GH4 below TOOL00040 TAMPER PLATE KD Soil compaction use with adapter tool 74 AY NV SS Driving sheeting 9 1 2 x 9 1 2 for GHO7 12 x 12 for GH1 thru GH2 GHS2 16 x 16 for GH3 thru GH4 POST and PIPE DRIVER P in Driving guard rails use with adapter tool yr Driving fence posts for GH1 thru GH4 A FS wo Z 00100042 TOOLS FROM H amp E SERIES HAMMERS WILL NOT FIT GH SERIES ATTENTION 28 TOOLS CHANGING THE TOOL REMOVAL 1 Remove the retaining pin ring E by using pliers or a screwdriver t22 see Figures 1 and 2 It will easily come out if pulled at an angle as shown in Figure 2 Figure 1 2 Screw an M12 bolt or cap screw AF into the retainer pin D see Figure 3 3 Pull out retainer pin D If the retainer pin D is jammed use a hammer and drift from the opposite side 4 See page 32 for additional retaining pin inspection and reconditioning Figure
7. remove from the tool holder Dress with a grinder 2 Excessive blank hammering will cause chipping 76 in the retaining pin contact area 75 If neglected the chipping may reduce the life of the tool Dress with a grinder 55 2 0390 163 00499 3 If chipping 76 is found at the top of the tool replace the tool If neglected the piston impact surface will be damaged AM is normal AL needs to be replaced AL HAMA00164 5393 TORQUE VALUES FOR HAMMER FASTENERS If hammer or hammer bracket fasteners are found to be loose use the following charts If repairs are to be made see the NPK Hydraulic Hammer Service Manual Medium strength thread adhesive should be used on all the valve assembly bolts and the gas charge valve All other bolts should be lubed with anti seize compound VALVE CASE VALVE TOP AND SWIVEL ADAPTER FODEL BOTTOM CAP BOLT TORQUE BOLT TORQUE BOLT TORQUE ma ft Ib anam ft Ib ma ft Ib menm GHO6 Mi2 110 150 GH07 110 110 50 Mio 65 85 150 M10 5 85 65 GH3 M6 270 865 M16 270 GH4 370 500 16 270 365 M8 30 4 M20 525 710 370 500 110 150 NOTE TORQUES OF ALL BOLTS SHOWN ARE WITH THREADS BEING LUBRICATED HEX SOCKET SIZE BOLT DIAMETER SOCKET HEAD CAP SCREW
8. 3 RE INSTALLATION 1 Clean the retainer pin housing hole and retaining ring groove Coat the surface of the tool with grease then install Apply grease to the retaining ring housing groove Coat the retaining pin with grease then install pL m eee dq Install the retaining ring in the following manner a While deforming the retaining ring as shown in Figure 4 partially force it into the groove b Using the handle of the pliers or screwdriver press the rest of the ring into the groove see Figure 5 Figure 4 Figure 5 99 TOOLS MAXIMUM TOOL TO TOOL BUSHING CLEARANCE Replace the tool bushing F G and or tool HH when the tool to bushing gap reaches the maximum clearance To determine whether the bushing or tool requires replacement follow the instructions and charts shown below Step 1 Measure the tool to bushing gap d15 with the hammer horizontal as illustrated below If the clearance is at or greater than the charted maximum clearance then move on to the next steps eee MAXIMUM CLEARANCE MODEL INCH mm d15 1 4 6 5 1 4 mms 7 6 5 mms 7 N 1 4 1 4 3 8 RS N ooo Le _ F G HAMA00225 Step 2 Remove the tool from the tool holder Measure the diameter d16 of the bearing surface of the tool HH which is located on each side of the retaining pin groove The minimum tool diameter is compared to a new too
9. 42 WARRANTY STATEMENT 222 eti iing aga b g gana ache usn gd hid ha mede eis 43 STORAGE OF HYDRAULIC HANMIMBNE ted tear Eee Cuv rene 44 NOTES AND RECORD tech ta aka adeb Rule baa t htt o une b stia UG due teas 45 SAFETY Safety notices in NPK Instruction Manuals follow ISO and ANSI standards for safety warnings DANGER DANGER red notices indicate an imminently hazardous situation i which if not avoided will result in death or serious injury WARNING orange notices indicate a potentially hazardous situation A WARNING which if not avoided could result in death or serious injury CAUTION yellow notices indicate a potentially hazardous situation which if not avoided may result in minor or moderate injury _ ATTENTION blue notices in Instruction Manuals standard to alert the reader to situations which if not avoided could result in equipment damage WARNING and BASIC OPERATING INSTRUCTIONS decals are included with each NPK hammer and installation kit Decals must be installed in the cab visible to the operator while operating the hammer STAY CLEAR PRESSURE VESSEL GAS PRESSURE and TOOL SHARPENING decals are installed on all NPK hammer models Keep them clean and visible NPK will provide decals free of charge as needed 1 Operator and Service personnel must read and understand the NPK INSTRUCTION MANUAL to prevent serious or fatal injury 2 FLYING DEBRIS CAN CAUSE SER
10. ARE NEW REBUILT OR HAVE BEEN INACTIVE 18 BEFORE STARTING THE HAMMER aaa a kaa aaa aia aba gag 19 DAILY STARTUP PROGE DUR E e 19 JPE RAMON pe A a aa a apa a aan an ak aana a nane 20 SAFE OPERATING INSTRUCTION S a ea ag aan aa an ag See aa naa 20 OPERATING TECHNIQUES amp 21 ROUTINE INSPECTION AND 26 WEEISEY INSI EC ION sasa aa ag a aan a Ba na tases 27 TOOL O9 YX X er rere 28 STANDARD TOOL Ss saa rr re rr re re ee er rr err re 28 ACCES OOM TOOL T 28 CHANGING THE bagian naa ajaa bagian naa aaa an nabda 29 MAXIMUM TOOL TO TOOL BUSHING 30 TOOL RETAINING PIN INSPECTION esee 32 jS s Mig CIR Om 33 TORQUE VALUES FOR HAMMER FASTENERS eene 34 tanti T aia a 35 NITROGEN GAS PRESSURE xtv aita edem bet vea E etel da do umida 35 OASGOHABROGESADAE EB arani aening naa 35 K I aa ani aana aana an aane ana buck naa inan paga nak a naa inap naga naa aa 36 CHECKING THE GAS PRESSURE iioii tint Itam ve M SE TEM UL 37 CHARGING THE HAMME R S 39 DISCHARGING THE GAS PRESSURE aii aaa r 40 WARRANTY REGISTRATION FOR NEW UNITS eene
11. HYDRAULIC INSTALLATION HYDRAULIC QUICK DISCONNECTS NPK recommends against the use of non NPK quick disconnects on hydraulic circuits operating NPK Products 1 The hydraulic pulsations caused by hydraulic hammer operating can cause internal pieces of non NPK quick disconnect to disintegrate These pieces would migrate into the hammer causing damage If quick disconnects are used when the hammer is removed from the excavator the quick disconnects should be capped to keep them clean f this is not done contamination in the disconnect will be flushed into the hammer when re connected This again can cause damage Most quick disconnects create a restriction in the circuit NPK Hammers are not back pressure sensitive but restrictions cause unnecessary heating of the oil Also the pressure required to operate the hammer plus the restriction in the disconnects may push an older low pressure carrier machine to the limit of its hydraulic system This would interfere with proper hammer operation However the NPK approved quick disconnects are properly sized so that the hammer operation is not affected NOT RECOMMENDED CONNECTION APPROVED CONNECTION 39 Non NPK Quick Disconnects 32 0004 APPROVED CONNECTION QUICK DISCONNECTS DX CONTACT YOUR NPK DEALER FOR ADDITIONAL INFORMATION ABOUT NPK QUICK DISCONNECTS HYDKO00005 HYDRAULIC INSTALLATION HYDRAULIC QUICK DISCONNECTS If hydraulic quick disconnects a
12. mix new oil with the old Do not allow any contamination to mix with the oil Take special care in preventing contamination from entering the hydraulic system through the hose or tube connection when changing the hydraulic hammer with the bucket Low oil level will cause heat build up resulting in deterioration of the oil Also it may cause cavitation due to air mixing with the oil leading to a damaged hydraulic hammer and carrier components Keep the oil at the proper level at all times Do not use the hydraulic hammer at an operating temperature higher than 180 F 80 C The proper operating oil temperature range is between 120 F 50 C and 180 F 80 C Since contaminated cooler fins causes reduced efficiency of the cooler keep the cooler fins clean at all times Check the hydraulic oil cooling system to be sure it is working effectively The use of a heat gun is the best way to evaluate if the cooler is working properly Water in the hydraulic oil will lead to damage of the hydraulic hammer and carrier Drain off water and foreign matter from the hydraulic tank at specified intervals When out of service the hydraulic hammer should be stored indoors CHANGING THE FILTER ELEMENT AND HYDRAULIC OIL Change the filter element and hydraulic oil at the intervals described in the operation manual of the skid steer or excavator when using a hydraulic implement Another method is to set up an oil sampling schedule and change accordingly
13. ENTION OPERATING TECHNIQUES amp PRECAUTIONS DO NOT DROP THE HAMMER RAPIDLY ON AN OBJECT Remember the hydraulic hammer is heavier than an empty bucket and will move faster than expected ETT 452 DO NOT USE THE HAMMER OR BRACKET TO MOVE LARGE OBJECTS Do not use the hammer bracket for purposes other than for what is was intended AVOID OPERATING THE HAMMER WITH CYLINDERS AT THE END OF STROKE Continuous operation with the boom cylinders fully closed or extended may damage the hydraulic cylinders E x CS TINA HAMA00453 24 OPERATION ATTENTION OPERATING TECHNIQUES amp PRECAUTIONS DO NOT OPERATE HAMMER UNDERWATER Do not allow parts other than the tool to be submerged in water Underwater operation will damage the hammer and allow water to enter the hydraulic system The hammer can be modified for underwater operation contact the NPK Dealer DUE for more information 00454 DO NOT SUBMERGE A HOT TOOL IN WATER The tip of the tool may be hot from operation Submerging in water can cause the tip of the tool to become brittle and break prematurely
14. I OILINESS PUMP AND DEFINITIONS DEFINITION ee The ability of grease gear lubricant or oil to cling to metal Used to helo combat metal to metal contact thus reducing wear The ability of grease gear lube or oil to cling to itself thus resisting tearing apart Consistency of grease is its hardness or firmness It is determined by the depth in millimeters to which the cone of a penotrometer sinks into a sample under specified conditions Consistency of grease may be influenced by the type and amount of thickener viscosity of oil working and other factors subjected to heat begins to actually drip and breakdown film on metal surfaces thus forming a film of protection Film strength is defined as the tendency of oil molecules to cling together It is the ability of those molecules to resist separation under pressure between two metals and to hold these metal surfaces apart The resistance to fluid flow in a hydraulic system An energy loss in terms of power output Surface damage on mating moving metal parts due to friction A severe form of adhesive wear Use of a substance grease oil etc to reduce friction between parts or objects that move against each other A rating given to a grease from the National Lubricating Grease Institute This rating determines the hardness of the grease and goes on from a 000 to a 6 rating Most greases are NLGI 2 rated Oiliness is measured of the coefficient of friction of a
15. ING TEMPERATURE PSI BARS PSI BARS plus 0 minus 25 plus 0 minus 25 350 24 405 28 GAS CHARGE ADAPTER MODELS GH06 GH07 GH2 GHS2 The Models GH06 GH07 GH1 and GH2 GHS2 hydraulic hammers have a gas charge fitting in the gas head that is different from all other NPK hydraulic hammers After removing the existing plug g12 the adapter P N 30604100 g13 is threaded on to the existing gas charge fitting This adapter is included in the gas charge kit that is provided with the hammer and allows use of the standard NPK gas charge valve P N A 30604040 g1 see next page AMAOS 535 GAS CHARGE GAS CHARGING KIT ALL NPK HYDRAULIC HAMMERS are furnished with the following gas charging kit In addition a nitrogen tank and pressure regulator valve not furnished with the hammer is required These can be obtained from your local welding supply house An optional regulator valve part no 21101050 is available from NPK CHARGE ADAPTER PART NO 30604040 PLUG PART NO 30102050 HOSE PART NO 20118010 CHARGING KIT BOX PART NO 35001030 CAP PART NO 30100500 OPTIONAL REGULATOR VALVE PART NO 21101050 Be advised that when using special charge adapter g13 to adapt for the use of standard NPK gas charge valve g1 it is important to make sure that pin g14 bottom picture is not bent or damaged in any way If pin g14 is bent or damaged it may not be possible to check t
16. IOUS OR FATAL INJURY e Keep personnel and bystanders clear of hammer while in operation e Do not operate HAMMER without an impact resistant guard between HAMMER and operator NPK recommends LEXAN or equivalent material or steel mesh some carrier manufacturers offer demolition guards for their machine Check with the carrier manufacturer for availability If vonorarruronoor available please call NPK 3 Do not hardface or sharpen the tool point with a cutting X t sro torch Excessive heat from torching or welding can cause embrittlement breakage and flying pieces Resharpen by milling or grinding only using sufficient d coolant SHIELD FLYING OR FALLING DEBRIS CAN CAUSE OR FALLING DEBRIS CAN CAUSE ERIOUS OR FATAL INJURY Read um Operators Manual Operator must be protected an impact resistant shield or cab window Keep bystanders away r H100 7210 LJ SAFETY 10 11 12 13 14 15 Fully extend the tool while charging the HAMMER with nitrogen gas Be sure that the retaining pin is installed STAY CLEAR OF TOOL POINT WHILE CHARGING Do not disassemble a HAMMER before discharging the hammer gas pre charge USE NITROGEN GAS ONLY Store and handle nitrogen tanks per OSHA regulations Avoid high pressure fluids Escaping fluid under pressure can penetrate the skin causing serious injury Relieve pressure before disconnecting hy
17. ULIC INSTALLATION KIT Special hydraulic pressure control valves are not required The NPK HYDRAULIC HAMMER operating pressure Is self regulating 2 CONTROL SYSTEM USING THE NPK MULTIVALVE For carriers not equipped with a suitable auxiliary or spare valve section the NPK HYDRAULIC INSTALLATION KIT includes a solenoid operated priority flow control valve to operate the NPK HYDRAULIC HAMMER The NPK MULTIVALVE is specifically designed for the operation of boom mounted attachments HYDRAULIC INSTALLATION ATTENTION PREVENTION OF CONTAMINATION A hydraulic hammer is harder on oil than using a bucket so the oil is apt to deteriorate and breakdown sooner Neglect of the oil system can not only damage the hydraulic hammer but also cause problems in the carrier which could result in damaged components Care should be taken to check for contamination of the oil to change it if it is found contaminated Oil sampling at regular intervals is highly recommended When the hydraulic oil shows low viscosity and bubbles this indicates that the oil is deteriorated If the oil is dark brown and gives off an offensive odor it is severely deteriorated Change the oil immediately When the oil is clouded or the oil filter has become clogged it indicates that the oil is contaminated Change the oil immediately To change the contaminated hydraulic oil drain the hydraulic system completely and clean components Do not
18. URES section in Service Manual Circuit relief pressure is at least 500 psi 35 bar above hammer operating pressure Cold gas charge is the initial set with the hammer at ambient temperature Hot gas charge is checked after 1 to 2 hours of running and with a system oil temperature of 140 to 180 F 60 to 80 C This is the preferred check 5 Pressures listed are maximum Use tolerance of minus 25 psi 2 bar DUI HYDRAULIC INSTALLATION NPK INSTALLATION KITS are available for virtually all compatible backhoe loaders excavators and skid steers Complete parts and instructions for the hydraulic installation of the NPK HYDRAULIC HAMMER including valving and or controls hoses and fittings boom and stick tubing and clamps are provided ipLe PESE HAMMER LINES Typically the pressure line is arranged on the left side of the boom and the return line on the right side Flow to the hammer is controlled from an auxiliary valve on the carrier or from an NPK supplied valve Hydraulic oil generally is routed back to the tank thru the carrier s oil cooler and filter HAMMER CONTROL VALVE NPK uses two general types of control systems depending upon the carrier model 1 CONTROL SYSTEM USING THE CARRIER AUXILIARY OR SPARE VALVE SECTION This type of installation utilizes an existing carrier valve Any additional parts such as a mechanical linkage hydraulic pilot actuators flow control valves etc are furnished in the NPK HYDRA
19. and remove boom pins m1 and m2 The hydraulic lines must be handled carefully and sealed to prevent contamination from entering the hammer or the carrier hydraulic system The tool end of hammer should be set lower than the ATTENTION head end to prevent moisture from entering the hammer through the tool area MOUNTING TO THE CARRIER ATTENTION 1 Place the hammer horizontal on wood blocks t20 as shown 2 Align the boom pin holes m10 Install the stick pin before the cylinder link pin 3 Connect hydraulic hoses PRESSURE is on left RETURN is on right 4 Open shut off valves LUBRICATION GREASING PROCEDURE Manual greasing for hammers without AUTOLUBE system 1 Place the hammer in a vertical position applying enough downforce to push the tool up into the hammer 2 urn machine off 3 Grease the hammer until grease begins to come out around the tool and lower bushing 4 Grease hammer at least once an hour or install an NPK Autolube System See Correct Grease and Grease Intervals for a more exact greasing procedure APPLY DOWNFORCE TO PUSH TOOL UP INTO HAMMER NOTE USE A GOOD QUALITY EP 2 LITHIUM BASED GREASE WITH WEAR INHIBITING ADDITIVES SEE PAGES 13 14 AND 15 LUBRICATION CORRECT GREASE AND GREASE INTERVALS Proper hammer maintenance requires a sufficient supply of the correct grease to the tool chi
20. draulic or other lines Operate HAMMER from operator s seat only Match HAMMER size to carrier according to NPK recommendations The carrier must be stable during hammer operation and during transport See CARRIER MACHINE COMPATIBILITY section of the NPK instruction manual Do not make any alterations to the TOOL without authorization from NPK Engineering Use proper lifting equipment and tools when handling or servicing the HAMMER Wear ear protection and safety glasses when operating the hammer Consult OSHA MSHA regulations when applicable Beware of flying metal pieces when driving Boom Pins If modifications are to be made do not alter the HAMMER without authorization from NPK Engineering Use only genuine replacement parts specifically disclaims any responsibility for any damage or injury that results from the use of any tool or parts not sold or approved by NPK For further safety information consult the AEM Hydraulic Mounted Breakers Safety Manual AEM form MB 140 NPK P N H050 9600 which is furnished with every NPK hammer To request an additional copy please contact NPK at 800 225 4379 or Internet at www npkce com 1 HYDRAULIC MOUNTED ARM BREAKERS i www aem org NT SAFETY MANUAL FOR OPERATING AND MAINTENANCE PERSONNEL INTRODUCTION NPK is a leading manufacturer of HYDRAULIC HAMMERS and has the most complete product line available anywhere The success of NPK is due to our commitme
21. ducts sold by NPK NPK MAKES NO OTHER WARRANTIES OR REPRESENTATIONS WHATSOEVER EXPRESS OR IMPLIED OF THE QUALITY PERFORMANCE DURABILITY MATERIALS WORKMANSHIP SUITABILITY CONDITION DESIGN OR UTILITY THESE WARRANTIES DO NOT COVER FAILURES RESULTING OF PRODUCTS SOLD BY NPK INCLUDING WITHOUT LIMITATION FROM IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ALL SUCH OTHER WARRANTIES AND REPRESENTATIONS BEING HEREBY EXP Maintenance repair or storage which NPK judges improper SPECIAL INCIDENTAL OR Not performing DAILY VISUAL INSPECTIONS as specified in the ING WITHOUT LIMITATION COSTS LOSSES OR LIABILITIES ON NPK MANUALS ACCOUNT OF DELAY OR DOWNTIME Misuse abuse alteration or improper installation Exceeding the tool and or tool bushing wear limit Underwater operation Operation after discovery of defective or worn parts DISCLAIMER REGARDING OTHER REPRESENTATIONS Unreasonable delay in making a repair after being notified of a i 4 potential product problem WARRANTIES No person is authorized to grant any other warranties or to assume any other liability on NPK s behalf unless made or assumed in writing by an officer of NPK No person is authorized to grant any warranties or to assume any liabilities on the seller s behalf unless made or assumed in writing by the seller Internet www npkce com As used in this warranty the term means
22. he charge in the hammer When the Standard NPK gas charge valve is coupled to the adapter g13 pin g15 should move downward approximately 1 8 as the T handle g2 is turned clockwise 00397 If the pin 914 in the center of the NPK gas charge valve 91 is bent checking and charging the hammer may not be possible 36 GAS CHARGE CHECKING THE GAS PRESSURE Inspect the nitrogen gas pressure every 100 hours Note The gas charge determines the striking power of the hammer If the gas charge is low the energy produced by the hammer will be low PROCEDURE 1 The gas pre charge is measured with no preload on the tool Remove the tool or position the hammer with the tool fully extended THE HAMMER MUST NOT BE RESTING ON THE POINT 4 MODELS GH3 GH4 and GH6 Only GH2 GHS2 Install the NPK charging adapter g1 Remove plug g12 Install adapter on the hammer charge valve M 913 part no 30604100 into the female port on the gas head Install NPK charging adapter g1 CAUTION Remove the valve cap only not the charge valve assembly HAMAO00029 5 Tighten the charging adapter cap 96 io GAS CHARGE CHECKING THE GAS PRESSURE HAMA00030 Turn the T handle g2 clockwise As the T handle is screwed in a resistance is encountered By turning the T handle further the nitrogen gas pressure will be indicated on the pressure gauge g8 Stop turning the T hand
23. ing prematurely worn tools and tool bushings CORRECT GREASE The type of grease used is very important NPK recommends a lithium soap base EP Extreme Pressure NLGI 2 Grease with Moly Molybdenum Disulfide or other surface protecting additives A high drop point 500 F 260 C grease is desirable On the following page is a list of commonly available greases by manufacturer and brand name that meet NPK s recommendations NPK does not endorse any one brand as being superior to another If you or your customers use a brand not listed please call the NPK Service Department at 800 225 4379 LUBRICATION CORRECT GREASE FOR HYDRAULIC HAMMERS Amoco Rykotac EP Grease Amolith Grease 94601 Rykon Premium Grease EP Grade 94108 Rykon Premium Moly Grease Grade 94114 Amoco Molylith Grease 92006 Muscle Products Corporation MPC PL 10 Powerlift Grease LP 10 Lithium EP Plus NPK Universal Plus Lithium EP Grease Super Duty EP Grease water resistant Chisel Paste Retinax amp HD Grease Bearing Gard 2 Molytex EP 2 14 LUBRICATION CORRECT GREASE FOR HYDRAULIC HAMMERS NPK HAMMER GREASE NPK now offers hammer grease specially formulated to meet severe job requirements The grease is available in three different temperature ranges 350 500 and 2000 All are compatible with Autolube systems Universal Plus and Super Duty are lithium soap based products that resists washout and contain NPK 10 additive for surface p
24. ing this period inspect the NPK HYDRAULIC HAMMER and INSTALLATION KIT for leaks or loose connections Do not operate on a slanted surface during the start up operation C Pe ote ee yD PESE RE TERI v d HAMA00444 OPERATION WARNING SAFE OPERATING INSTRUCTIONS 1 HHT HAMA00445 DO NOT OPERATE THE HAMMER WITHOUT AN IMPACT RESISTANT CAB WINDOW OR SHIELD IN PLACE BEWARE OF FLYING DEBRIS FROM THE HAMMER TOOL POINT An impact resistant cab window or shield must be in place to protect the operator Do not use the hammer in a way as to cause rock etc to be thrown towards the cab DO NOT USE THE HAMMER AS A HOIST The hammer is not intended to lift an object To do so can be dangerous DO NOT TOUCH HOT TOOL AFTER USING 20 OPERATION ATTENTION OPERATING TECHNIQUES amp PRECAUTIONS PRELOAD THE TOOL BEFORE STARTING Press the tip of the demolition tool vertically against the object to be broken Be sure the object is stable before activating the NPK HYDRAULIC HAMMER HAMAO00449 APPLY DOWNFORCE ON THE TOOL Raise 104 the front of the machine slightly by applying down force on the demolitio
25. ivate the hammer circuit for 3 5 second intervals Continue for an additional 3 4 times to ensure that all the air has been purged from the hoses and hammer before first use Failure to do this could result in damage to internal components STOP 4 4 1 2 3 4 3 Place hammer firmly against material to be broken see page 21 Operate the hammer in a vertical position for approximately 10 minutes at one half engine speed Increase engine speed to three quarters and continue operating at this speed for another 10 to 20 minutes Increase to full engine speed Maintain vertical position for the first hour of operation HAMAD0275 START UP OPERATION ATTENTION BEFORE STARTING THE HAMMER PRE OPERATION INSPECTION AND WARM UP Before operating the NPK HYDRAULIC HAMMER be sure to perform the specified ROUTINE INSPECTION see page 26 Warm up the NPK HYDRAULIC HAMMER see below and the base machine in accordance with the machine manufacturers instruction manual This is especially important during cold weather operation DAILY START UP PROCEDURE Operate the NPK HYDRAULIC HAMMER in the vertical position at 3 4 engine throttle setting for about 1 2 minutes Dur
26. l bushing F G only If the tool is at or below the charted value the tool must be replaced 4 16 105 6 3 8 96 4 30 TOOLS MAXIMUM TOOL TO TOOL BUSHING CLEARANCE Step 3 Measure the inside diameter of the lower and upper tool bushings The maximum tool bushing inside diameter is compared to a new tool only If the tool bushing dimensions are at or above the charted value the bushing must be replaced NEW BUSHING MAXIMUM BUSHING MODEL INSIDE DIAMETER INSIDE DIAMETER INCH mm INCH mm GHO6 1 67 42 4 1 87 47 4 GHO7 1 87 47 4 2 07 52 6 2 82 3 21 3 40 86 4 4 19 106 4 2 46 62 6 Step 4 Compare the tool and bushings to the charts in Step 2 and Step 3 Choose the new component tool or bushing that will bring the maximum clearance to below the value seen in the chart of Step 1 Obviously replacing both the tool and bushings would bring the clearance back to new sus 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 HAMMER MODELS GH06 GH07 GH2 GHS2 GH4 GH6 00168 me oye TOOLS TOOL INSPECTION 1 Deformation may occur on the tool in the retaining pin contact area 75 or thrust surface 37 If these areas are mushroomed the tool may become difficult to
27. le when the gauge reads pressure Do not over tighten 7 Compare the gauge pressure with the NITROGEN GAS PRESSURE CHART see page 35 If the gas pressure is 25 psi 2 bar or more below specification proceed to NITROGEN GAS CHARGING PROCEDURE If the pressure is correct go to the next step 8 Turn the T handle g2 counterclockwise until it stops as in step 3 9 Slowly loosen the charge adapter cap to relieve the nitrogen gas pressure trapped in the charge valve 10 Remove the charge adapter from the hammer charge valve 11 Remove NPK adapter part no 30604100 12 Reinstall existing plug 38 GAS CHARGE CHARGING THE HAMMER AA CAUTION USE NITROGEN GAS ONLY STAY CLEAR OF THE TOOL WHILE CHARGING THE HAMMER WITH GAS The tool may be impacted by the piston and forced out abruptly PROCEDURE 1 Carry out steps 1 thru 4 of CHECKING THE GAS PRESSURE see page 37 2 Remove the cap from the charge adapter AA CAUTION Remove the valve cap only not the charge valve assembly RL SEA DE WE Ai w Qu L i HAMA00033 HAMAO00031 3 Install a pressure 4 Connect a hose from the 6 Turn the handle g7 on the regulator on a tank of pressure regulator on the tank regulator nitrogen gas nitrogen tank g9 to the counterclockwise to fully charge adapter g1 close 5 Turn the T handle 92 7 Open the valve 910 on the charge adapter 91 the nitrogen tank b
28. lubricant Oiliness or lubricity depends on the adhering characteristics of an oil It is determined by the attraction between the molecules of the oil and the molecules of another material Of two oils having the same viscosity but different degrees of fluid friction the one with the lower friction index has the higher degree of oiliness A device which converts mechanical force into hydraulic fluid power Basic design types are gear vane and piston units LUBRICATION LUBRICANT TERMS AND DEFINITIONS TERM DEFINITION ee nng RESERVOIR A container for keeping a supply of working fluid in a hydraulic system VIBRATION A quivering or trembling motion VISCOSITY Is the actual SAE weight of the product Example motor oils come in 10 20 30 40 50 and 15 40 SAE weight The viscosity designation of a lubricant indicates its internal resistance to flow START UP OPERATION ATTENTION HAMMERS THAT ARE NEW REBUILT OR HAVE BEEN INACTIVE Before using a new hammer for the first time the first time after rebuild or a hammer that has been inactive for a long period of time 1 Check the nitrogen gas pressure The nitrogen gas pre charge is factory checked before shipment However it is recommended the pressure be checked before using the NPK HYDRAULIC HAMMER for the first time For the inspection procedure see CHECKING THE GAS PRESSURE page 37 2 At idle raise the hammer off of the ground Place hammer vertical and act
29. n tool Press the control lever or the foot pedal to start the NPK HYDRAULIC HAMMER Applying excessive force to the hammer will raise the carrier too high and jolt the operator when the material breaks Let the NPK HYDRAULIC HAMMER do the work AVOID BLANK HAMMERING As soon as the material is broken release the control lever or pedal to prevent unnecessary blank hammering Blank hammering is continued hammer operation after the material is broken This will overheat the hydraulic system cause undue wear and result in eventual tool retaining pin failures see page 33 91 OPERATION ATTENTION OPERATING TECHNIQUES amp PRECAUTIONS DO NOT SLANT HAMMER For the most efficient demolition align the direction of force 57 from the boom with the penetration direction 52 of the tool HH Failure to do this decreases the transfer of energy from the piston to the rock and increases the bending forces at the fulcrum of the tool This unnecessary added stress leads to the following problems 1 Premature bushing wear and or tool breakage 2 Breakage of tie rods 3 Breakage of bracket bolts When the tool binds from an incorrect working angle the sound of the hammer changes 00234 Keep the boom direction of force 57 in the same direction the tool is penetrating Use the boom cylinder to preload the hammer a
30. nt to quality dependability and long life The HYDRAULIC HAMMER has many unique designed features and it is a company philosophy that the NPK HYDRAULIC HAMMER can be brought to like new condition long after competitive products are scrapped You can feel confident that you have purchased the best value available This comprehensive operators manual contains instructions for operating and maintaining NPK HYDRAULIC HAMMERS This manual includes helpful information for obtaining the full potential and efficiency from NPK HYDRAULIC HAMMERS Please read this manual thoroughly to understand the NPK HAMMER and its operating principles before using it For additional information or help with any problem encountered please contact your NPK authorized dealer Whenever repair or replacement of component parts is required only NPK parts should be used NPK is not responsible for failures resulting from substitution of parts not sold or approved by NPK CARRIER MACHINE COMPATIBILITY These carrier weight ranges are intended as a guideline only Other factors such as stick length counterweights undercarriage etc must be taken into consideration Mounting a HAMMER that is too heavy for the carrier machine CAUTION can be dangerous and damage the machine Verify carrier stability with hammer before transport or operation Mounting a HAMMER that is too small for the carrier machine can damage the HAMMER cause tool breakage and void Warran
31. pply down force and use the bucket and stick cylinders for alignment Keep the tool tangent to the arc of the boom 54 TOOLO0043 99 OPERATION ATTENTION OPERATING TECHNIQUES amp PRECAUTIONS DO NOT USE THE HAMMER TOOL AS A PRY BAR Excessive prying can cause premature bushing wear and tool or tie rod breakage When hammering materials that allow the tool to penetrate before breaking move the hammer slightly fore and aft to create a cone shaped hole vented hole allows trapped dust and heat to escape increases the tool penetration rate into the material and prevents overheating the tool tip DO NOT HAMMER CONTINU OUSLY IN THE SAME POSITION FOR MORE THAN 30 SECONDS If the tool cannot break or penetrate into the material after hammering in the same position for 30 seconds change the working location Hammering in the same position for a long time will reduce the working efficiency increase the hydraulic oil temperature overheat the tool tip and accelerate tool wear LU LL TooLo0044 ALWAYS WORK BY BREAKING TO A FREE FACE The material must have somewhere mG to break Start at an edge 1115 128 OPERATION ATT
32. r damage wear or deformation on a regular weekly basis Replace the tool and or bushings when wear exceeds the maximum clearance limit see page 30 Do not hard face or sharpen the tool point with a cutting torch Excessive heat from torching or welding causes embrittlement breakage and flying pieces Resharpen only with a surface grinder or milling machine using sufficient cooling Please consult your authorized NPK Dealer or NPK Service Department for additional information 26 WEEKLY INSPECTION 1 WELDS Check for cracks repair as necessary Consult your authorized NPK Dealer or NPK Service Department for additional information 2 TOOL RETAINING PIN Remove the retaining pin and inspect for peening caused by excessive blank hammering If necessary grind edges smooth as shown in TOOL RETAINING PIN INSPECTION see page 32 The retaining pin must rotate freely 3 DEMOLITION TOOL Remove the demolition tool and inspect for peening caused by excessive blank hammering If necessary grind edges smooth as shown in TOOL INSPECTION see page 33 4 GAS CHARGE Check and adjust if required see pages 35 through 40 YT TOOLS STANDARD TOOLS Trenching ee Cutting casting gates Breaking oversize E General demolition The cross cut FX tool cuts at right angle or crosswise to the stick and boom of the excavator Concrete breaking Highway construction General demolition Secondary breaking Breaking oversize
33. re used with the NPK Hammer it is recommended that the following precautions be followed 1 Periodic inspection of both male and female ends is recommended to ensure the couplers are in good working condition Failure to inspect couplers may result in pieces from a damaged or failed coupler to be injected into the hammer or parts of the coupler returned to the machine 2 Check for dirt dust and debris on both couplers 32 before coupling 3 Be sure that the couplers are completely seated together 38 4 When replacing couplers be sure that couplers are replaced as a set male and female Do not use one new end and one used end HYDKOOO0 7 MOUNTING INSTALLATION NPK Mounting Installation Kits include the parts required to adapt the NPK HYDRAULIC HAMMER to the carrier NPK mounting kits include the hammer mounting bracket flow control valve if required and hoses to connect to the carrier hydraulic system m1 Stick Pin If Required m2 Link Pin If Required m3 Pressure Hose m4 Return Hose m7 Top Bracket m8 Hammer Bolt Package m9 Klik Pin 1 Close pressure and return line shut off valves k4 2 Disconnect hydraulic hoses AO before laying the hammer down 3 Cap the pressure and return lines on the carrier and connect the hammer whip hoses 4 Position the hammer DR horizontal on wood blocks t20
34. rotection in friction effected areas Chisel Paste is an aluminum complex soap base with 12 graphite and copper additives for extreme operating conditions UNIVERSAL PLUS NPK PART 350 deg NO 14 OZ CARTRIDGE 2000 1010 120 LB KEG G000 1020 35 LB PAIL G000 1030 400 LB DRUM G000 1040 S 500 deg NO UNIVERSAL PLUS SUPER DUTY CHISEL FASTE EP2 GREASE 2 GREASE WATER RESISTANT EXTREME TEMP CHISEL PASTE NPK PART HAMA00404 2000 de d NO 14 OZ CARTRIDGE G000 1050 AUTOLUBE SYSTEMS An automatic greasing system is recommended to reduce hammer tool and tool bushing wear The NPK AUTOLUBE System is designed to automatically provide a continuous supply of grease to the hammer tool and tool bushing increasing tool and tool bushing life by reducing wear The AUTOLUBE pump is capable of pumping EP2 grease in cold weather The pump output is adjustable according to the requirements of the hammer model and to compensate for tool bushing wear NPK hammer models GH1 GH2 GHS2 GH3 and GH4 have a connection port 26 located in the impact spacer for an automatic greasing system GH4 shown Hefer to the NPK AUTOLUBE Instruction Manual for details 2 4 Bes LUBRICATION LUBRICANT TERMS TERM ADHESIVE ANTI WEAR AGENTS COHESIVE CONSISTENCY CONTAMINATION DROPPING POINT EXTREME PRESSURE AGENTS FILM STRENGTH FRICTION GALLING LUBRICATION NLG
35. rt during normal working hours Duties brokerage fees and local taxes Overtime rates and travel expenses will not be reimbursed WARRANTY REPAIRS DO NOT EXTEND THE STANDARD WAR USER RESPONSIBILITY RANTY PERIOD Photos must accompany all warranties submit LIMITATIONS AND EXCLUSIONS ted to NPK These photos can be 35mm Violation of any federal provincial state or local laws ordinances rules or regulations or removal or alteration of product serial numbers void NPK s written product warranties Application for warranty must be made within 30 days of failure repair polaroid or digital The installer user operator repairer assumes responsibility to read understand and comply with NPK s written INSTALLA TION OPERATOR and SERVICE INSTRUCTIONS Returning Warranty Registration to NPK at the time of installation All costs associated with transporting the NPK product or equip ment to which the NPK product is installed to an authorized NPK Dealer or other authorized location NPK is not respon sible for any expense incurred in field repair Supplying a hydraulic oil sample from the carrier machine upon request by NPK THIS PRODUCT MUST BE USED IN A SAFE AND LAWFUL MANNER IN COMPLIANCE WITH APPLICABLE OSHA REGULATIONS The written product warranties made by NPK set forth NPK s only obligations with respect to any claims of failure defects or deficiencies in pro
36. sel The tool must be pressed against a hard surface until it stops up inside the hammer This prevents grease from entering piston impact area and ensures proper distribution of grease between the tool and tool bushings GREASE INTERVALS If the hammer is not connected to an Autolube system see page 15 the hammer must be greased at regular intervals to get the best life from the tool and tool bushings There are two ways to determine grease intervals First grease the hammer at the beginning of the job until grease comes out between the tool and the lower tool bushing Run the hammer until the shank of the tool starts to look dry This determines the time interval for the greasing of this particular hammer on this particular job Typically this is 1 to 4 hours Also note the amount of grease needed to re grease the tool This gives you the amount of grease and how often it must be applied An example would be that a particular hammer on a particular job requires half a tube of grease every 3 hours This would be the greasing schedule you would set up If this hammer was moved to another job another grease schedule may have to be determined Second if you can t control the grease schedule such as rental units then have the operator grease the hammer once every hour of hammer operation Again grease the hammer until grease comes out between the tool and tool bushing This is usually more often than required but is far cheaper than replac
37. t the bottom of this area click the START REGISTRATION box and continue If the registration is completed online there is no need to mail or fax the warranty registration End users non NPK dealers In the tool bar click on DEALERS You do NOT need to fill in user name and password In the left column click on the REGISTRATION Complete the fields with an orange diamond next to them At the bottom of this area click the START REGISTRATION box and continue If the registration is completed online there is no need to mail or fax the warranty registration 42 WARRANTY STATEMENT Use Genuine Parts 6 08 NPK warranty BOOM MOUNTED HYDRAULIC HAMMER APPLICATION FOR WARRANTY MUST BE MADE WITHIN 30 WORKING DAYS OF FAILURE REPAIR BASE WARRANTY 6 months CONSTRUCTION EQUIPMENT INC warrants that new Boom Mounted Hydraulic Hammers sold by will be free from defects in material or workmanship for a periad of six B months starting from the date of delivery to the first user This warranty excludes all wear items retaining pin both upper and lower tool bushings impact ring and bushing MAIN COMPONENT EXTENDED WARRANTY 1 year or 1 500 operating hours The MAIN COMPONENT EXTENDED WARRANTY covers failure of the MAIN BODY TOOL HOLDER and GAS HEAD resulting from defects in material or workmanship in those parts under normal use and service for the period starting with the expira
38. ties Please consult NPK Engineering for specific detailed information CARRIER WEIGHT Ibs kg HAMMER MOUNTING RECOMMENDED RANGE MODEL STYLE Ib kg okid Steer 2 400 3 500 1 100 1 600 okid Steer 3 000 5 500 1 350 2 500 okid Steer 5 000 7 500 2 300 3 400 okid Steer 6 000 9 000 2 00 4 100 okid Steer 8 000 14 000 3 600 6 400 Specifications are subject to change without notice HAMMER SPECIFICATIONS HAMMER IMPACT WORKING MOUNTING TOOL MODEL ENERGY FREQUENCY WEIGHT DIA WORKING CLASS LENGTH ft Ib in mm in mm GHO06 480 1200 Skid Steer 1 7 42 12 2 311 Excavator GH07 500 1200 250 Skid Steer 1 9 47 Excavator GH1 350 550 1100 750 Skid Steer 2 2 57 Excavator GH2 GHS2 500 500 1300 800 Skid Steer 2 6 66 Excavator GH3 500 1150 Skid Steer 3 0 76 Excavator 1300 400 1050 3 4 86 2000 500 800 4 2 106 HAMMER OIL FLOW HYDRAULIC CIRCUIT GAS CHARGE OPERATING RELIEF PRESSURE PRESSURE minimum osi bar osi bar 1650 115 2150 150 2000 140 350 24 405 28 405 28 24 40 90 150 2900 200 390 27 450 31 Specifications subject to change without notice NOTES 1 Hydraulic operating pressure maximum is inlet pressure at the hammer with the oil at operating temperature and with the gas charge set at the hot operating pressure See CHECKING THE HYDRAULIC PRESS
39. tion of the BASE WARRANTY and ends twelve 12 months or 1 500 operating hours whichever occurs first from the date of delivery of the hammer to the first user NPK MAIN COMPONENT EXTENDED WARRANTY does not cover labor travel expenses or the replacement or repair of any other part damaged due to MAIN BODY TOOL HOLDER or GAS HEAD failure or repair thereof THIS WARRANTY DOES NOT APPLY TO DEMOLITION TOOLS and ACCESSORY TOOLS HYDRAULIC and MOUNTING INSTALLATION KIT PARTS HOSES or REPLACE MENT PARTS which are covered by other warranties NPK RESPONSIBILITY THESE WARRANTIES SPECIFICALLY EXCLUDE will at its option repair or replace with a new or reconditioned Installations not approved by part any warranted part that fails by reason of defective material Replacement due to normal wear or workmanship free of charge delivered at a place of business of Repairs by other than an authorized Dealer an NPK Dealer Note Parts replaced under warranty become the Use of parts not sold by THE USE OF WILL FIT PARTS property of NPK WILL VOID ALL NPK WARRANTIES Labor charges that are deemed excessive by NPK During the six 6 month BASE WARRANTY period will pay Parts shipping charges in excess of those which are usual and the cost of labor at 75 of the posted shop rate that is necessary to customary Air freight unless pre approved will not be covered install any repaired or replacement pa
40. y turning clockwise the T handle counterclockwise 8 Slowly adjust the regulator on the nitrogen tank to the correct pressure by turning clockwise See NITROGEN GAS PRESSURE CHART or decal g11 on hammer 9 Charge nitrogen gas until the pressure gauge g8 on the charge adapter g1 is at the correct setting then turn the T handle g2 counterclockwise all the way out 10 Close the nitrogen tank valve and then remove the hose from the charge adapter 91 Y e Nitrogen gas may be trapped in the Se amens AA CAUTION hose Loosen fittings slowly to release pressure 11 Remove the charge adapter 91 from the hammer charge valve 12 Reinstall existing plug 39 GAS CHARGE DISCHARGING THE GAS PRESSURE PROCEDURE 1 Remove the charge valve cap M1 2 Turn the charging adapter T handle g2 counterclockwise until it 3 The GH06 GH07 GH1 and 4 Install the charging adapter 91 GH2 GHS2 hydraulic hammers have a on the hammer charge valve M gas charge fitting in the gas head that is different from all other NPK hydraulic hammers After removing the existing plug g12 the adapter g13 part no 30604100 is threaded onto the existing GH06 GH07 GH1 and GH2 GHS2 gas charge fitting This adapter is included in the gas charge kit that is provided with the hammer and allows use of the standard NPK gas charge valve g1 part no 30604040 40 GAS CHARGE
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