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NPK

- 20 -

LUBRICATION

AUTOLUBE GREASE LINE PRE-FILLING

8. Pump grease through the grease line

(

29

) until a steady stream of grease (

28

)

is realized at the opposite (hammer) end.

9. Re-attach the grease line (

29

) to the

hammer (KK).

10. Pump twenty more shots of grease into

the grease line (

29

). This will prime the

hammer cavity and pre-lube the tool.
Look for grease coming out around the
tool (HH) at the tool bushing (see
arrow).

11. Remove the hose fill adapter (a13) and

re-connect the grease line (

29

) to the

Autolube pump (FZ).

NOTE: If the Autolube has run out of grease, the above procedure should be

used to purge all the air out of the line before using the hammer. Failure
to do this will result in an intermittent supply of grease to the hammer.

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Содержание GH10

Страница 1: ...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 ...

Страница 2: ... AND DEFINITIONS 22 START UP OPERATION 24 HAMMERS THAT ARE NEW REBUILT OR HAVE BEEN INACTIVE 24 BEFORE STARTING THE HAMMER 25 DAILY START UP PROCEDURE 25 OPERATION 26 SAFE OPERATING INSTRUCTIONS 26 OPERATING TECHNIQUES PRECAUTIONS 27 IMPACT ENERGY TRANSMISSION THROUGH TOOLS 32 IMPACT STRESS WAVES AT THE END OF THE TOOL 33 ROUTINE INSPECTION AND MAINTENANCE 34 WEEKLY INSPECTION 35 TYPES AND APPLICA...

Страница 3: ...51 CHIPPING OF A MOIL POINT TOOL TIP 52 CHIPPING OF A CHISEL TOOL TIP 52 TEMPERATURE RELATED TOOL PROBLEMS 53 TOOL BREAKAGE DUE TO CORROSION 54 TOOL BREAKAGE DUE TO DEFECTIVE MATERIAL 54 TORQUE VALUES FOR HAMMER FASTENERS 55 HAMMER BRACKET GH7 THROUGH GH50 56 GAS CHARGE 57 NITROGEN GAS PRESSURE 57 GAS CHARGING KIT 57 CHECKING THE GAS PRESSURE 58 CHARGING THE HAMMER 60 DISCHARGING THE GAS PRESSURE ...

Страница 4: ...or 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 MANUALS to prevent serious or fatal injury 2 FLYING DEBRIS CAN CAUSE SERIOUS OR FATAL INJURY Keep personnel a...

Страница 5: ...IBILITY section of the NPK Service Manual 10 Do not make any alterations to the TOOL without authorization from NPK Engineering 11 Use proper lifting equipment and tools when handling or servicing the HAMMER 12 Wear ear protection and safety glasses when operating the hammer Consult OSHA MSHA regulations when applicable 13 Beware of flying metal pieces when driving Boom Pins 14 Do not alter the HA...

Страница 6: ...ial 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 f...

Страница 7: ...damage the HAMMER cause tool breakage and void Warranties Please consult the NPK Sales Department for specific detailed information CARRIER WEIGHT lbs kg HAMMER RECOMMENDED CARRIER WEIGHT RANGE MODEL lb kg GH7 28 000 42 000 12 700 19 000 GH9 40 000 56 000 18 000 25 000 GH10 46 000 66 000 20 000 30 000 GH12 56 000 86 000 25 000 38 000 GH15 66 000 100 000 30 000 45 000 GH18 70 000 114 000 32 000 52 ...

Страница 8: ...65 210 2600 180 3100 215 365 25 420 29 GH12 45 58 170 220 2650 183 3150 218 365 25 420 29 GH15 53 66 200 250 2600 180 3100 215 365 25 420 29 GH18 58 77 220 290 2500 172 3000 207 365 25 420 29 GH23 66 85 250 320 2600 180 3100 215 390 27 450 31 GH30 74 92 280 350 2600 180 3100 215 390 27 450 31 GH40 79 106 300 400 2600 180 3100 215 390 27 450 31 GH50 92 119 350 450 2600 180 3100 215 390 27 450 31 Sp...

Страница 9: ...NPK 8 HAMMER SERIAL NUMBER LOCATION NPK HAMMER MODELS GH7 through GH50 The serial number location sn1 is right of center on the body above the Autolube port ...

Страница 10: ...d filter HAMMER CONTROL VALVE NPK uses two general types of control systems depending upon the carrier model 1 CONTROL SYSTEM USING 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 control valve flow control valves etc are furnished in the NPK HYDRAULIC INSTALLATION KIT Special hy...

Страница 11: ... hydraulic system through the hose or tube connection when changing the hydraulic hammer with the bucket 3 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 4 Do not use the hydraulic hammer at an operating...

Страница 12: ...hed into the hammer when re connected This again can cause damage 3 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 of the disconnects may push an older low pressure carrier machine to the limit of its hydraulic system Th...

Страница 13: ...e the couplers are in good working condition Failure to inspect couplers may result in pieces from a damaged or failed coupler to migrate into the hammer or parts of the coupler returned to the machine 2 Check for dirt dust and debris on both couplers before coupling 3 Be sure that the couplers are completely seated together 38 4 For most non NPK couplers be sure that couplers are replaced as a se...

Страница 14: ...connect to the carrier hydraulic system Refer to HAMMER FASTENER TORQUE section for top bracket bolt torque Refer to NPK Installation Kit Manual for additional information ITEM DESCRIPTION k8 TEST PORT m3 WHIP HOSE PRESSURE m4 WHIP HOSE RETURN m5 HAMMER HOSE PRESSURE m6 HAMMER HOSE RETURN m7 TOP BRACKET m8 BOLT PACKAGE m15 I D TAG m16 INSIDE MALE ADAPTER FITTING m17 OUTSIDE MALE ADAPTER FITTING 12...

Страница 15: ... horizontal on wood blocks t20 and remove the boom pins 1 Place the hammer horizontal on wood blocks t20 as shown 2 Align the boom pin holes Install the stick pin m1 before the cylinder link pin m2 3 Clean away any dirt found on the hose connections and connect hoses Pressure line is on left return line on right side of boom 4 Open shut off valves k4 The hydraulic lines must be handled carefully a...

Страница 16: ...orce applied to push the tool all the way in This prevents grease from entering piston impact area 2 Turn the machine off 3 Grease the hammer until grease begins to come out around the tool and lower bushing APPLY DOWNFORCE TO PUSH TOOL UP INTO HAMMER NOTE USE A GOOD QUALITY EP 2 LITHIUM BASED GREASE WITH WEAR INHIBITING ADDITIVES SEE PAGES 16 17 AND 18 ...

Страница 17: ...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 g...

Страница 18: ...e M EP 2 Dryden Oil Company Moly EP 2 Exxon Ronex Extra Duty Moly NLGI 2 Fiske Brothers Refining Co Lubriplate MO LITH No 2 John Deere TY6333 TY6341 Moly High Temp Kendall L 424 Mobil Moly 372 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 Pennzoil Adhezolith EP 2 Grease Phillips 66...

Страница 19: ... LB PAIL G000 1030 400 LB DRUM G000 1040 SUPER DUTY 500 deg NPK PART NO 14 OZ CARTRIDGE G000 1011 120 LB KEG G000 1021 35 LB PAIL G000 1031 400 LB DRUM G000 1041 CHISEL PASTE 2000 deg NPK PART 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...

Страница 20: ...lying enough down force to push the tool up into the hammer 2 Turn the machine off 3 Fill the NPK Autolube pump reservoir with a power greaser through the fill fitting on the side of the pump or from the top by removing the fill cover Use a premium quality grade EP 2 high temperature grease with wear inhibiting additive 4 Disconnect the grease line 29 from the Autolube main pump cartridge a4 5 Ins...

Страница 21: ... grease line 29 This will prime the hammer cavity and pre lube the tool Look for grease coming out around the tool HH at the tool bushing see arrow 11 Remove the hose fill adapter a13 and re connect the grease line 29 to the Autolube pump FZ NOTE If the Autolube has run out of grease the above procedure should be used to purge all the air out of the line before using the hammer Failure to do this ...

Страница 22: ...NPK 21 LUBRICATION AUTOLUBE GREASE LINE PRE FILLING G100 8050 Hose Fill Assembly 30 B160 4010 Grease Fitting NPT male DQ K301 6620 Male x Female Adapter 6 JIC male x NPT female ...

Страница 23: ... 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 FRICTION The resistance to fluid flow in a hydraulic system An energy loss in terms of power output GALLING Surface damage on mating moving metal parts due to friction A severe form of adhesive wear LUBRICATION Use of a substance grease oil...

Страница 24: ... 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 ...

Страница 25: ...ocedure 2 At idle raise the hammer off of the ground Place hammer vertical and activate 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 3 Place hammer firmly against material to be broken Operate the hammer in a vert...

Страница 26: ...ic hammer see below and the carrier machine in accordance with the machine manufacturer s instruction manual This is especially important during cold weather operation DAILY START UP PROCEDURE Operate the NPK hydraulic hammer in the vertical position at 1 2 engine throttle setting for about 1 2 minutes During this period inspect the NPK hydraulic hammer and installation kit for leaks or loose conn...

Страница 27: ...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 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 ...

Страница 28: ...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 bro...

Страница 29: ... 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 4 Decrease in transfer of energy translates to reduced production When the tool binds from incorrect working angle the sound of the hammer changes Keep the boom direction of force 51 in the same direction the tool is penetrating Use the boom cyl...

Страница 30: ...creases 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 hydra...

Страница 31: ...y bucket and will move faster than expected 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 retracted or extended may damage the hydraulic cylinders ...

Страница 32: ...er and allow water to enter the hydraulic system The hammer can be modified for underwater operation contact NPK at 800 225 4379 for more information 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 DO NOT ALLOW THE HAMMER TOOL TO HIT THE BOOM Use caution when tucking the hamm...

Страница 33: ...uced by the piston when it hits the tool is transmitted through the interior of the tool as a compression stress wave until it reaches the rock concrete or other material that the tool is about to break The compression wave speed is equal to the speed of sound through steel i e approximately 15 000 ft sec Therefore if the tool is three feet long the impact force reaches the object to be broken 1 5...

Страница 34: ...the tool is not in contact with the material to be broken the energy of the compression waves has nowhere to go and therefore returns totally in the chisel as tensile waves This is referred to as a blank hammer blow see page 27 The compression waves and the tensile waves travel in a complex manner in the tool during hammer operation While these waves are gradually being attenuated by the internal ...

Страница 35: ...itions Important The hammer must be in a vertical position with downforce 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 bushing Use a good quality high temperature EP 2 grease containing anti wear additives see LUBRICATION section If machine is equipped with an AUTOLUBE Syst...

Страница 36: ...nspect for peening caused by excessive blank hammering If necessary grind edges smooth as shown in TOOL RETAINING PIN INSPECTION section 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 section 4 GAS CHARGE Check and adjust if required see GAS CHA...

Страница 37: ...ht angle or crosswise to the stick and boom of the excavator Trenching Cutting casting gates Breaking oversize General demolition MOIL P Concrete breaking Highway construction General demolition BLUNT E Secondary breaking Breaking oversize Slag removal OPTIONAL TOOL CORE PC Concrete breaking Highway construction General demolition ...

Страница 38: ...CATION NPK demolition tools can be identified by the numbers found stamped in the retaining pin slot area These numbers must be included in all warranty correspondences regarding a broken tool Photos must also be included ...

Страница 39: ...E DOES NOT APPLY TO MODELS GH23 GH50 Figure 1 Figure 2 RE INSTALLATION 1 Clean the retainer pin housing hole and retaining ring groove 2 Coat the surface of the tool with grease then install 3 Apply grease to the retaining ring housing groove 4 Coat the retaining pin with grease then install 5 Install the retaining ring in the following manner a While deforming the retaining ring as shown in Figur...

Страница 40: ...MODEL MAXIMUM CLEARANCE inch mm GH7 3 8 10 GH9 3 8 10 GH10 3 8 10 GH12 1 2 13 GH15 1 2 13 GH18 1 2 13 GH23 5 8 16 GH30 5 8 16 GH40 5 8 16 GH50 5 8 16 Step 2 Remove the tool from the tool holder Measure the diameter d16 of the bearing surface of the tool which is located on each side of the retaining pin groove The minimum tool diameter is compared to a new tool bushing only If the tool is at or be...

Страница 41: ...m MAXIMUM BUSHING INSIDE DIAMETER inch mm GH7 4 6 116 5 0 126 GH9 5 0 126 5 4 136 GH10 5 4 136 5 7 146 GH12 5 7 146 6 3 159 GH15 6 1 156 6 7 169 GH18 6 5 165 7 0 178 GH23 6 9 175 7 5 191 GH30 7 2 184 7 9 200 GH40 8 0 204 8 7 221 GH50 8 4 214 9 1 231 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...

Страница 42: ... the tool point with a cutting torch Re sharpen only by milling or grinding using sufficient coolant MODEL NO d16 d21 inch mm inch mm GH7 4 50 114 0 62 16 GH9 4 88 124 0 62 16 GH10 4 92 125 0 75 19 GH12 5 51 140 0 75 19 GH15 5 91 150 0 75 19 GH18 6 3 160 0 75 19 GH23 6 69 170 0 75 19 GH30 7 09 180 0 75 19 GH40 7 87 200 1 00 25 GH50 8 27 210 1 00 25 ...

Страница 43: ... TOOL WORKING LENGTH d22 inch mm inch mm inch mm GH7 4 6 116 45 2 1147 23 583 GH9 5 0 126 47 2 1200 24 608 GH10 5 4 136 51 4 1306 24 620 GH12 5 7 146 55 4 1407 26 650 GH15 6 1 156 59 1 1502 27 690 GH18 6 5 165 63 2 1606 29 740 GH23 6 9 174 66 1 1676 35 889 GH30 7 2 184 73 1 1854 32 813 GH40 8 0 204 76 4 1940 38 5 979 GH50 8 4 214 85 1 2135 38 8 985 NOTE Minimum tool length is determined by the dep...

Страница 44: ...ng pin when it is new Note the two guide grooves AN The guide groove areas and the area 122 between the grooves are the areas where the wear will take place If large flat areas are found here the pin must be replaced This would indicate that the hammer is not being greased frequently enough Figure A Normal wear 20 will occur on the pin as shown in Figure B Grind this area on a bench grinder or wit...

Страница 45: ... grinder 2 Excessive blank hammering will cause chipping 16 in the retaining pin contact area 15 If neglected the chipping may reduce the life of the tool Dress with a grinder 2A Excessive blank hammering can cause retaining pin breakage failure Replace retaining pin D 3 If chipping 16 is found at the top of the tool replace the tool If neglected the piston impact surface will be damaged 13 is nor...

Страница 46: ...ecial application tools which are excluded from warranty NPK RESPONSIBILITY NPK will at its option replace with a new or reconditioned tool any warranted tool that fails by reason of defective material or workmanship free of charge delivered at a place of business of an NPK Dealer Tool breakage is specifically covered ONLY for straight across breakage as shown at locations A Note The tool to bushi...

Страница 47: ...me position for over 30 seconds THESE WARRANTIES DO NOT COVER FAILURES RESULTING FROM Installation alteration operation maintenance repair or storage which NPK judges improper Inadequate lubrication Exceeding the tool and or tool bushing wear limit Unreasonable delay in making a repair after being notified of a potential product problem THESE WARRANTIES SPECIFICALLY EXCLUDE Any tool which is alter...

Страница 48: ...TICS OF THE BROKEN SECTION 1 The starting point of a fatigue fracture is on the surface of the tool and located at the front or rear side of the tool with the hammer installed on the excavator and viewed from the cab 2 The tool has galled areas on its surface The galling initiates a surface crack from which the fatigue fracture starts The stress cracks combined with bending loads and impact shock ...

Страница 49: ...the moment of impact The entire force of the piston is concentrated in a small area of the impact head of the tool Fig 1 This results in the impact head area being chipped or broken Fig 2 3 With the tool at an angle and in excessive side loading contact with the tool holder bushings the shock load traveling down the tool is unevenly concentrated Fig 1 This can result in the tool breaking through t...

Страница 50: ...mit listed below See the NPK Hydraulic Hammer Service Manual for maximum diameter d16 tool bushing G wear chart and minimum tool HH diameter d16 MODEL MAXIMUM CLEARANCE INCH mm GH7 GH9 GH10 3 8 10 GH12 GH15 GH18 1 2 13 GH23 GH30 GH40 GH50 5 8 16 WARRANTY NPK Warranty does not cover tool failure caused by worn tool holder bushings G Tool Bushing HH Tool d15 Clearance d16 Tool Diameter ...

Страница 51: ... prevent stress cracks B DEFORMATION OF THE RETAINING PIN SLOT SIDES The tool may become chipped or deformed in the area where it is in contact with the retaining pin As the tool breaks material it will try to follow any fracture lines in the material Fig 1 This causes a chisel point tool to twist in the tool holder The retaining pin limits how far the tool can twist If this happens often enough t...

Страница 52: ...overheat the tool tip If this is done repeatedly the tip will lose temper and mushroom Overheating wears the tip faster and can allow the tip to chip PREVENTATIVE MEASURES Move tool position if material is not broken after 30 seconds of hammering If the material still resists breaking a larger hammer may be required ...

Страница 53: ...nt FX or FY tool or a larger size hammer E CHIPPING OF A CHISEL TOOL TIP Chisel tool tips may be chipped due to hammer being undersize for application Overheating tool by hammering for more than 30 seconds in one spot can cause chipping PREVENTATIVE MEASURES Use correct size hammer for job conditions Do not hammer for more than 30 seconds without moving hammer WARRANTY NPK Warranty does not cover ...

Страница 54: ...rranty does not cover this type of failure EXCESSIVE SLANT HAMMERING When constant slant hammering is performed while using boom downforce the tool may become deformed as shown in the picture below HIGH TEMPERATURE When the tool is used in a high temperature environment such as for slag removal from a furnace the tool may be deformed as shown in the picture below PREVENTATIVE MEASURES Use compress...

Страница 55: ...onment or before long term storage be sure to rinse with fresh water Dry the tool and coat it with grease to protect it from corrosion WARRANTY NPK Warranty does not cover this type of failure TOOL BREAKAGE DUE TO DEFECTIVE MATERIAL If metal fatigue originates from the interior not the exterior the material has some defect and fatigue will break the tool The picture below illustrates the broken se...

Страница 56: ...M14 145 200 GH18 M27 925 1250 M24 600 810 M14 145 200 GH23 M27 925 1250 M24 600 810 M14 145 200 GH30 M27 925 1250 M27 925 1250 M14 145 200 GH40 M27 925 1250 M27 925 1250 M16 155 210 GH50 M30 1400 1900 M30 1400 1900 M16 155 210 See HAMMER DISASSEMBLY AND ASSEMBLY TOOLS AND EQUIPMENT section of the Service Manual for NPK hex key wrench part numbers HEX HEAD BOLTS MODEL HAMMER BRACKET RUBBER MOUNTS T...

Страница 57: ... the torque values Bolts marked Location L1 are not affected and the standard torque remains the same Lube all bolts NPK HAMMER MODEL L1 L2 GH7 1000 1000 GH9 1000 500 GH10 1000 500 GH12 1750 500 GH15 1750 500 GH18 1750 500 GH23 2500 2500 GH30 2500 2500 GH40 2500 2500 GH50 2500 2500 NOTE This is not required to be done to units in the field or dealer inventory until time of rebuild ...

Страница 58: ...OT 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 SPECIFICATIONS MODEL AT AMBIENT TEMPERATURE cold before operating PSI BAR plus 0 minus 25 AT OPERATING TEMPERATURE PSI BAR plus 0 minus 25 GH7 350 24 405 28 GH9 365...

Страница 59: ...he tool or position the hammer KK with the tool fully extended 2 Remove the charge valve cap M1 from the hammer charge valve M Do not remove the charge valve assembly 3 Turn the NPK charge adapter T handle g2 to a full counterclockwise position 4 Install the NPK charge adapter g1 onto the hammer charge valve located on the hammer gas head L 5 Tighten the charge adapter cap g6 ...

Страница 60: ...ssure with the NITROGEN GAS PRE CHARGE chart in the NITROGEN GAS PRESSURE section If the gas is 25 psi 2 bar or more below the specification proceed to the NITROGEN GAS CHARGING PROCEDURE section of the manual If the pressure is correct go to the next step 8 Turn the T handle counterclockwise until it stops as in step 3 9 Slowly loosen the charge adapter cap to relieve the nitrogen gas pressure tr...

Страница 61: ...ckwise 5 Turn the handle g7 on the tank regulator counterclockwise to a fully closed position Do not overtighten 6 Open the valve g10 on the nitrogen tank g9 by turning the handle counterclockwise 7 Slowly adjust the regulator on the nitrogen tank to the correct pressure by turning the handle clockwise Refer to the NITROGEN GAS PRE CHARGE chart in the NITROGEN GAS PRESSURE SECTION 8 Charge the nit...

Страница 62: ...61 GAS CHARGE CHARGING THE HAMMER Nitrogen gas may be trapped in the hose Loosen fittings slowly to release pressure 10 Remove the charge adapter from the hammer charge valve 11 Replace the charge valve cap ...

Страница 63: ...CHARGE VALVE ASSEMBLY 4 Tighten the charge adapter cap g6 5 Turn the T handle g2 clockwise As the T handle is screwed in a resistance is encountered By turning the T handle the nitrogen gas pressure will be indicated on the pressure gauge g8 Stop turning the T handle when the gauge reads pressure Do not overtighten 6 Loosen the charge adapter cap g6 VERY SLOWLY The gas pressure will gradually decr...

Страница 64: ...sing 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 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 End users non NPK Dealers In the tool bar click on DEALERS You do NOT...

Страница 65: ... the NPK HYDRAULIC HAMMER is not to be used for a long period of time months the following storage procedure is recommended 1 Discharge the gas pressure using the gas charge valve M 2 Remove the tool HH and push the piston N all the way in 3 Grease the exposed end of the piston N 4 Grease and reinstall the tool HH at bushing areas 5 Plug the hydraulic hoses AO 6 Cover with a waterproof tarp t21 no...

Страница 66: ...NPK 65 WARRANTY STATEMENTS ...

Страница 67: ...NPK 66 WARRANTY STATEMENTS ...

Страница 68: ...NPK 67 WARRANTY STATEMENTS ...

Страница 69: ...NPK 68 WARRANTY STATEMENTS ...

Страница 70: ... _______________ SERIAL NUMBER _______________ NPK INSTALLATION KIT NUMBER ________________________ CARRIER MANUFACTURER MODEL NUMBER SERIES SERIAL NUMBER DATE OF INSTALLATION _________________ DATE OF 20 HOUR INSPECTION ___________ WARRANTY REGISTRATION SENT ...

Страница 71: ... Copyright 2014 NPK Construction Equipment Inc www npkce com H050 9630G GH7 GH50 Hyd Ham Operators Manual 4 14 ...

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