COIL NAILER Model NV 75AG
Contents
1. ALTERNATIVE PARTS Printed in Japan 8 02 020830N Hitachi Koki Co Ltd2. 37 Assembly Diagram for NV 75AG 1 PRODUCT NAME Hitachi 75 mm 3 Coil Nailer Model NV 75AG 2 MARKETING OBJECTIVE Nails 75 mm 3 long are most popularly used for framing work in the U S A Although our current coil nailer Model NV 83A is capable of driving nails 83 mm 3 1 4 long maximum it is heavy in weight 3 5 kg 7 7 Ibs C is also heavy in weight 3 6 kg 7 9 lbs even though it is capable of driving nails 70 mm 2 3 4 long maximum The newly developed 75 mm 3 coil nailer Model NV 75AG is ultra lightweight 2 5 kg 5 5 Ibs and features the following O Pop out magazine allows easy nail loading from the top of the magazine because the nail holder can be tilted O Driving depth is adjustable without tool The driving section is simplified because the depth adjuster is located near the trigger The tip of the nose is easy to see and operate O The exhaust air outlet is 360 adjustable without tool O Capable of driving either wire collated or sheet collated nails There is a demand for a high power nailer capable of driving larger diameter nails from the users of the Model NV 65AH The new Model NV 75AG can also satisfy the above demand Please expand the sales of the new Model NV 75AG 3 APPLICATIONS e Floor and wall framing Siding fencing decking e Wall and roof sheathing e Mobile home and modular housing construction e Crate and pallet construction Note The nails of 3 3 mm 131 di
3. NV 75AG HITACHI POWER TOOLS TECHNICAL DATA COIL NAILER AE NV 75AG SERVICE MANUAL EZIN LIST No E006 Aug 2002 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT REMARK Throughout this TECHNICAL DATA AND SERVICE MANUAL a symbol s is are used in the place of company name s and model name s of our competitor s The symbol s utilized here is are as follows Competitors Symbols Utilized Company Name Model Name R SENCO SCN60 E CONTENTS Page 1 PRODUCT NAME ceea ceia ana s nii a aa KAN ROSE RDD asa ann AA 1 2 MARKETING OBJECTIVE canis uu cn ko nn male census non anna nana agata ag aud nnam aureas 1 3 APPLICATIONS u u eege atacau du iati caca au aia alai aa 1 4 SELLING POINTS sete kika kon ceea aceata aaa sap od i ia cana anan op aa aia aaa aaa aa a ia bab ak panpan bn acess 1 55 SPECIFICATIONS uu y in d an ak bon D EES 2 Bz SPOCIICAUORS sese a a a e e e tk 2 EE Le EE 3 5 3 NaN DINING ee 5 6 COMPARISONS WITH SIMILAR PRODUCTS 6 7 PRECAUTIONS IN SALES PROMOTION U nenea nennen u 7 7 1 Instruction Manual mmm 7 7 2 Warning Label 7 7 3 Related Laws and Regulations q 7 7 4 Precautions in Operation 2 22s T 8 8 MECHAN
4. 58 j Plunger A 59 eb O Ring 1 1 8 60 E Valve Bushing A 61 Fig 14 25 dia bar Head Valve 52 B 53 When disassembling do not pull out this part by gripping it with pliers Plunger A 59 Fig 15 Valve Bushing B 53 li Hole A 22 Wire with 1 5 to 3 mm dia 0 059 to 0 118 surface Fig 16 Valve Bushing Valve Piston B 57 Valve Bushing A 61 e Pull out the Roll Pin D3 x 28 38 with the roll pin puller 8 mm 0 118 dia and take out the control valve in the following manner 1 Remove the Exhaust Cover 5 by following the procedure in 1 section 10 2 2 As shown in Fig 15 put a 4 to 5 mm 0 157 to O Ring I D 16 8 0 197 dia bar in from the upper side of the Body 18 and push the top of Valve Piston B 57 Now the parts forming the control valve can be taken out except Valve Bushing A 61 and Head Valve O Ring I D 16 8 52 CAUTIONS e Be careful not to damage Valve Piston B 57 Valve Bushings A 61 and B 53 etc e Do not pull out the end of Plunger A 59 with pliers 3 To take out Valve Bushing B 53 put a 1 5 to 3 mm 0 059 to 0 118 dia wire with its end hooked into the hole in the bushing and pull it out while being careful not to damage the internal surface of Valve Bushing B 53 as shown in Fig 16 Be careful not to damage
5. RETAINING RING FOR D28 HOLE 10 PCS 877 371 NYLON NUT M5 882 907 SLEEVE 883 853 PUSHING LEVER COVER A 882 901 PROTECTOR B 883 106 NOSE CAP A 878 184 WARNING LABEL 883 984 MAGAZINE A 883 111 PIN 877 826 FEEDER SHAFT RING 883 985 MAGAZINE COVER A 883 987 HOLDER CAP A 880 398 RATCHET SPRING 880 503 NAIL HOLDER 878 791 ROLL PIN D2 5X12 883 986 HOLDER SHAFT A 881 826 SPRING 880 319 SHAFT RING 949 757 HEX SOCKET HD BOLT M5X20 10 PCS 880 318 GUIDE LOCK 880 446 SPRING 883 392 NAIL GUIDE 883 085 NAIL STOPPER A 883 088 STOPPER SPRING A 883 086 NAIL STOPPER B 883 087 STOPPER SPRING B 883 089 NAIL GUIDE COVER 883 393 COVER 882 881 SLEEVE B 880 630 NYLOCK HEX SOCKET HD BOLT M4X12 883 983 MAGAZINE ASS Y m N MN 1 sch lt lt sch lech lech lech Ni Lech N IN Iech ech N Lech Jeck Lech JAN lech 8 lech INCLUD 62 74 84 8 02 ALTERNATIVE PARTS 3 STANDARD ACCESSORIES DESCRIPTION EYE PROTECTOR CODE NO 875 769 REMARKS NV 75AG 943 277 HEX BAR WRENCH 3MM 944 458 HEX BAR WRENCH 4MM 944 459 HEX BAR WRENCH 5MM
6. 10 5 Disassembly and Reassembly of the Driving Section Body 18 Ring for D28 Hole 68 O ring S 46 13 SOR TOR Ed Feed Piston Cover 67 Piston Bumper 20 Bumper 66 Feed Spring 65 Nose 22 X Fe d Piston 64 O ring P 4 21 Es O ring P 21 63 Nylock High Tension LAN O ring P 9 62 Bolt M6 x 20 W Rn lt d Roll Pin D4 x 16 Feeder Arm B 26 SS Feeder Spring 27 e Pushing Lever Spring 41 Pushing Lever C 42 Adjuster 44 Feeder 28 Roll Pin D2 x 16 43 Adjuster Spring 45 Adjsuter Plate B 46 Adjsuter Plate A 47 TENN _ O Ring 5 4 48 Pushing Lever Cover B 30 Pushing Lever B 49 O ring 5 5 50 Retaining Ring E type for D3 Shaft 51 Pushing Lever A 31 Fig 21 Disassembly and reassembly of the driving section TTE ie 1 Disassembly and reassembly of Nose 22 Pushing Lever A 31 and other parts a Disassembly See Figs 21 and 22 e Remove the four Nylock High Tension Bolts M6 x 20 23 Then the Nose 22 Pushing Lever A 31 and other parts can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Apply grease to the O ring S 46 13 and mount it in the groove of the Nose 22 e Align the bent portion of Adjuster Plate A 47 with the concave portion of the Pushing Lever Guide 40 e After reassembly check the com
7. 949 CAP 949 821 HEX SOCKET HD BOLT M5X16 10 PCS 872 035 DUST CAP 880 881 MACHINE SCREW W WASHERS M5X30 BLACK 949 865 ROLL PIN D3X28 10 PCS 883 990 TRIGGER 882 885 PUSHING LEVER GUIDE 882 892 PUSHING LEVER SPRING 882 891 PUSHING LEVER C 880 093 ROLL PIN D2X16 883 982 ADJUSTER 882 890 ADJUSTER SPRING 882 887 ADJUSTER PLATE B 882 886 ADJUSTER PLATE A 981 317 O RING S 4 882 888 PUSHING LEVER B 872 822 O RING S 5 872 971 RETAINING RING E TYPE FOR D3 SHAFT 2 ALTERNATIVE PARTS 8 02 k 1 ech Mi 1 sch ech lech ech Jeck l lech lech y OO Iech Iech Iech lech 1 sch Iech eck 1 eck lech Iech JS Iech Lech Iech ech 1 eck ech Lech 1 ech IM Iech 1 sch lech 1 ech 1 sch ech 1 ech ech 1 E sch 1 ech PARTS NV 75AG CODE NO DESCRIPTION REMARKS 877 699 HEAD VALVE O RING I D 16 8 878 881 VALVE BUSHING B 878 885 O RING S 18 878 925 O RING I D 8 8 878 887 O RING I D 11 880 672 VALVE PISTON B 878 884 PLUNGER SPRING 880 673 PLUNGER A 878 888 O RING I D 1 8 880 671 VALVE BUSHING A 872 645 O RING P 9 880 330 O RING P 21 883 300 FEED PISTON 882 883 FEED SPRING 877 711 BUMPER 880 331 FEED PISTON COVER 939 555
8. X c Gc 7 Ly X WW 8 Lg X WW ZE 9L L 8 X wOL EL EL X 2 L 0 L gz X 008 x WW 992 MXHX7 SUOISUSWIG 91 8 6 X 94 S EL X wEL EL OL ZE X BEE x UW LAZ 002 002 001 061 JOMOd sal 6 7 64 9 sal By S e Csal 9p ON L Z sal s s ON Gz luBieM isd 021 OZ 98 9 isd opt OZ 0 4 S V 8 AN IHOVLIH isd 021 OZ 2 2 6 98 9 HVS9 AN IHOVLIH isd 021 07 amp unejedo DC 9 8 S SVS AN IHOVLIH pue JeyeN SLONGOUd YVTINIS HLIM SNOSIHVdWOO 9 7 PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NV 75AG Nailer by all of our customers it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes the importance of the contents of the Instruction Manual and fully understands the meaning of the precautions listed on the Warning Label attached to each tool 7 1 Instruction Manual Although every effort is made in each step of design manufacture and inspection to provide protection against safety hazards the dangers inherent in the use of any pneumatic tool cannot be completely eliminated Accordingly general precautions and suggestions for use of pneumatic tools and specific precautions and suggestions for the use of the pneumatic nailer are lis
9. pressure setting to drive nail flush with NV45AC Li Size of nail mm in 2 3 x 45 mm 090 x 1 3 4 3 3 x 75 mm 131 x 3 Fig 4 Required nailing energy and nailer output energy t aZ 8 ww 09 LEL 0 660 0 g g uu sz aM v 2 2 ww OZ 09 ELLO 660 0 ww 6 z WW Ee aM L tz Z L 4 ww G9 ww ge ab l Z amp 1 ww ZG 8e 660 0 060 0 GZ WW ez GE 1 SZ ww Sp ulBue1 FELO 660 0 ww es weld uolelloo lC ub E L ZG WW Gp 660 0 060 0 g z ww ez sjreu peuinbai oo uoN p nb jou JOO jsneyxe papoan mioo jo eBueuo UONDOJIQ p nb jou pauinbaiJ oo p nb jou JOO lu uu sn pe pojnbou jou uidep bulug Guipeo dot onsejd yoejg woog onsejd 12919 woog enan onsejd yoejg adh ouizebeN dot Sjreu 096 00c Sjreu 00 00G sjeu 00 002 S reu 00 002 Ayoedeo ejoAo aJ 8800 5 6010 SO 9 oA9 4 LS ejo 9 3 6700 PADAN EL isd 001 zwo j6y 7 1e 2 9A9 e4 v90 0 uonduunsuoo 9 949 L ZE EL SX 9L LL 8L X E E L LE ZEL X WLU gpe x 062 9 6 8 X 26 4 1 21
10. the Collate the nails correctly and reload the nailer with e Magazine magazine them e Check that a nail does not e Remove burrs or deformed catch on some part of the part Replace the parts magazine e Adjust the height of the nail e Check the height of the nail holder correctly holder e Push lever e Check the operation of the e Correct or replace the parts push lever Output section piston driver blade etc e Air pressure is too low xe Piston O ring is abnormal worn or damaged xe Piston bumper is abnormal e O ring in the cylinder is abnormal removed deformed or damaged e Driver blade is abnormal deformed burrs or damaged Open the nail guide and perform idle driving to check that the driver blade is returned e Adjust the air pressure to 5 8 5 kgf cm 4 9 8 3 bar 70 120 psi e Replace the piston O ring Replace the piston bumper e Reassemble or replace the paris Correct or replace the part 15 Problem Possible cause x Most common cause Inspection method Remedy 1 Nails cannot e Cylinder inside surface is e Check that nails can be e Remove dust and then be driven abnormal packed with driven at 5 kgf cm 4 9 bar lubricate continued dust or worn 70 psi e Replace the part e Head valve sliding surface e Perform idle driving to Rep
11. with the Model NR 65AK since the Model NV 75AG has an air passage to feed nails The handle is equipped with the grip rubber rubber ring type instead of the grip tape Note that the repair part is the conventional grip tape because the grip rubber cannot be replaced by hand Cylinder Newly designed O Piston Newly designed Dust filter Dust filter is provided between the air inlet cap and the body to prevent dust from entering the inside common to the Model NR 90AC2 Gasket B The shape is changed to install the dust filter common to the Model NR 90AC2 The control valve section is common to the Model NR 65AK except the following O Plunger spring Common to the Model NV 65AH Trigger Newly designed Driving depth adjuster Located near the trigger to simplify the nose unit The tip of the nose is easy to see and operate e Driving section and magazine section The parts of the driving section and the magazine section have been newly designed Output section Driving section Plunger Valve Piston B 57 Spring 58 Valve Bushing Top Cover 3 B 53 Exhaust Exhaust Cover 5 Plun Ei ger A 59 Valve Bush vent rq alve Bushing Ee A 61 Head FIE Valve A 10 LE af DS Control valve section Accumulator Control valve section Piston H Trigger 39 Body 18 Grip rubber Driver blade 17 c oi Du
12. Hex bar wrench for M5 screw Code No 944458 e Hex bar wrench for M4 screw Code No 943277 Nose cap Code No 883106 PRESE EE EE EK EE EE EE EE OK OO Optional accessories Pneumatic tool lubricant 1 oz oil feeder Code No 877153 Pneumatic tool lubricant 4 oz oil feeder Code No 872042 Pneumatic tool lubricant 1 quart can Code No 876212 Sequential fire parts set Code No 881973 Case Code No 883323 5 2 Nail Selection The Model NV 75AG utilizes common round head nails collated by wire or sheet into coils from 200 to 300 pieces Applicable nail dimensions are shown below However it is recommended to use genuine HITACHI nails to ensure satisfactory driving quality CAUTION Ensure that nails are as specified in Figs 1 2 and 3 Other nails will cause clogging of nails and subsequent damage to the nailer NOTE Aluminum nails may bend when driven into a hard workpiece Test before use Wire collated nails Sheet collated nails Min Max Min Max 6mm 7 2mm 5 7mm 6mm 0 236 0 283 0 224 0 236 S Ti LO L E LO E l 2 5 mm 2 3 mm 0 099 0 090 2 5 mm 3 3 mm 0 099 0 131 Fig 1 Dimensions of nails Type L d di L1 L2 D1 D2 H 45 65 2 5 2 9 72 1 3 4 2 1 2 0 099 0 113 0 7 19 375 28 121 2 835 SE
13. ISM AND OPERATION u u 9 8 1 Mech aniiSIM E 9 8 2 Interchangeability of Parts AA 11 8 3 Operation Principle anemia nennt 12 9 TROUBLESHOOTING GUIDE 2 icona u s d annor noon ua nasa annt andan a a 14 9 1 Troubleshooting and Correction nnne nennen nnn nnne nnns 14 9 2 Possible Causes and Corrections of Air Leakage eee ana 19 10 DISASSEMBLY AND u nnn nnn annes aa 22 10 1 General Precautions in Disassembly and Reassembly 22 10 2 Disassembly and Reassembly of the Output Section a 23 10 3 Disassembly and Reassembly of the Control Valve Section 25 10 4 Disassembly and Reassembly of the Magazine Section 28 10 5 Disassembly and Reassembly of the Driving Section 31 10 6 Grip R bb r ode ee eta a a Po sire tat ti Peces a tat aa 35 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY 36 12 STANDARD REPAIR TIME UNIT SCHEDULES
14. N AND CONFIRMATION AFTER REASSEMBLY Check that Plunger A 59 moves smoothly e Check that there is no air leakage from each part e While driving nails with an air pressure of 4 5 kgf cm 63 psi check that there is no idle driving and bending of nails Note Before conducting the driving test turn Adjuster 44 to the deepest position e Recheck the tightening torque of each screw e Check that Pushing Lever A 31 slides smoothly e Check that the machine will not operate only by pulling the Trigger 39 Also check that the machine will not operate only by depressing Pushing Lever A 31 Push Nail Stopper A 90 and Nail Stopper B 92 with fingers to check that they smoothly return to position e Check that the Feed Piston 64 operates properly at 5 kgf cm 70 psi 4 9 bar Open the Nail Guide 89 and perform idle driving e Check that the Trigger 39 moves smoothly e Check that the Adjuster 44 turns smoothly 36 12 STANDARD REPAIR TIME UNIT SCHEDULES MODEL Variable Fixed 10 20 30 40 50 60 min General Assembly Work Flow Pushing Lever A Pushing Lever Cover B Adjuster Pushing Lever B Pushing Lever Spring Pushing Lever Guide O ring x 2 Feed Piston O ring x 2 Feed Spring Damper Feed Piston Cover Exhaust Cover Top Cover Packing B Head Bumper Head Valve Spring O ring x 2 Head V
15. S SE 0 028 0 748 1 476 1 102 4 764 1 1 2 3 0 120 0 131 di MM d Fig 2 Dimensions of wire collated nails L d D D2 H 45 57 2 3 2 5 20 118 61 5 1 3 4 2 1 4 0 090 0 099 0 787 4 645 2 421 Fig 3 Dimensions of sheet collated nails 4 Unit mm inch D2 or less D2 or less 5 3 Nail Driving Force Fig 4 shows by type of wood and nail the nailer output energy provided by the supply pressure and the nailing energy required for driving the nail flush Air pressure which exceeds the intersecting point between the nailer output energy and the required nailing energy for driving the nail allows the nail to be fully driven For example when driving a nail of 3 3 mm dia x 75 mm length 0 131 x 3 into a workpiece of hemlock with the Model NV 75AG a pressure of about 8 bar 8 2 kgf cm 116 psi allows the nailer to drive the nail flush with the wood surface A pressure beyond this value causes the nail head to be driven below the wood surface Fig 4 should be used as a reference only because those values vary depending on the type of wood moisture content and grain of wood Required nailing energy Nailer output energy mp kgcm J mp kghom J 80 80 1000 100 1000 100 sof 800f 99 Hemlock 20 Nail d 0 5 gc 70 80 90 100 110 120 psi mmxmm T Air
16. a x 75 mm 3 length may not be driven reliably into some materials Salespersons should instruct the customers to perform a driving test before actual use 4 SELLING POINTS Lightweight 2 5 kg 5 5 Ibs 360 adjustable exhaust Grip rubber za Tool less depth adjustment Capable of driven both wire collated and gt sheet collated nails Easy top load pop out magazine 5 SPECIFICATIONS 5 1 Specifications Model NV 75AG Driving system Reciprocating piston type Operating pressure 5 8 5 kgf cm 70 120 psi 4 9 8 3 bar Gauge pressure Length x height x width Driving speed 3 pcs sec Weight 2 5 kg 5 5 Ibs Dimensions 271mm x 338 mm x 132 mm 10 11 16 x 13 5 16 x 5 3 16 Nail feed system Spiral spring Nail capacity 200 300 nails 1 coil Air consumption 1 8 Itr cycle at 7 kgf cm 0 064 ft cycle at 100 psi 1 8 Itr cycle at 6 9 bar Air inlet 3 8 NPT thread Packaging Corrugated cardboard box Package dimensions Length x height x width 315 mm x 150 mm x 386 mm 12 3 8 x 5 7 8 x 15 1 4 Standard accessories Eye protector Code No 875769 A A A 4 A A M Hex bar wrench for M6 screw Code No 944459
17. alve A Valve Bushing A Plunger A Plunger Spring Valve Piston B Valve Bushing B O ring x 7 Piston H O ring Feeder Arm B Feeder Feeder Spring Adjustment Cylinder Body Valve Cylinder Plate Cylinder Piston Bumper O ring x 3 Nose Nail Guide Nail Stopper A Nail Stopper B Guide Lock Magazine Ass y 372 HITACHI LISTNO E006 PNEUMATIC TOOL PARTS LIST COIL NAILER 2002 8 30 Model NV 75AG E1 PARTS NV 75AG CODE NO DESCRIPTION REMARKS 949 657 HEX SOCKET HD BOLT M6X12 10 PCS 880 515 PLATE 880 514 TOP COVER 949 822 HEX SOCKET HD BOLT M5X35 10 PCS 883 451 EXHAUST COVER 883 452 GASKET B 882 914 HEAD BUMPER 882 913 HEAD VALVE SPRING 876 796 O RING P 22 882 912 HEAD VALVE A 878 863 O RING S 70 882 910 CYLINDER PLATE 882 874 O RING 5 46 877 368 O RING 1AP 48 883 989 CYLINDER 883 431 O RING 1 0 37 883 980 PISTON H 883 988 BODY NAME PLATE 883 432 PISTON BUMPER 874 436 O RING P 4 883 981 NOSE 880 675 NYLOCK HIGH TENSION BOLT M6X20 883 093 PLUNGER B 949 497 ROLL PIN D4X16 10 PCS 883 144 FEEDER ARM B 883 143 FEEDER SPRING 883 092 FEEDER 883 091 NAIL GUIDE SHAFT 882 900 PUSHING LEVER COVER B 883 852 PUSHING LEVER A 883 678 GASKET B 883 679 DUST FILTER 881
18. de then apply a thin coat of the lubricant to the steel parts to avoid rusting o Usable lubricant is specified in the following table Please recommend the customers to use Hitachi nailer tacker oil Type of oil Brand or product name Hitachi Pneumatic Tool Lubricant Shell sliding oil Tonna S32 Old Tonna T32 Code No 877153 1 oz oil feeder Code No 874042 4 oz oil feeder Code No 876212 1L 1 quart can 3 Be sure to drain the tank of the compressor securely to prevent deteriorated performance or malfunction of the Model NV 75AG due to rusting 4 Instruct the customers especially the heavy users to perform inspection and maintenance securely 8 MECHANISM AND OPERATION PRINCIPLE 8 1 Mechanism As illustrated in Fig 7 the Model NV 75AG can be generally divided into four sections Output section control valve section driving section and magazine section The parts of the output section and the control valve section are the same as those of the Model NR 65AK to allow the use of nails 75 mm 3 long though the basic construction is the same as the Model NV 65AH The parts of the driving section and the magazine section have been newly designed Primary differences from the Model NV 65AH are described below Output section e Control valve section To make it powerful the output section is common to the Model NR 65AK except the following Body There is no interchangeability
19. e disassembly or reassembly be sure to disconnect the air hose from the nailer with your finger released from the trigger to exhaust all the compressed air and remove all nails 10 1 General Precautions in Disassembly and Reassembly e Apply grease Nippeco SEP 3A Code No 930035 to the O rings and O rings sliding portions When installing the O rings be careful not to damage the O rings and prevent dirt entry e Oil required Hitachi pneumatic tool lubricant 1 oz 30 cc Dil feeder Code No 877153 4 oz 120 cc Oil feeder Code No 874042 1 quart 1 Itr Can Code No 876212 e f Gasket B 6 is damaged replace it and check that no air is leaking e Be especially careful to prevent the entry of foreign particles into the control valve section e Tightening torque for each part Bolt screw and cap 2 Nylock High Tension Bolt M6 20 23 16 2 1 5 165 15 11 9 1 1 Hex Socket Hd Bolt M6 x 12 1 9 8 0 78 100 8 7 2 0 6 Hex Socket Hd Bolt 5 x 16 35 6 3 0 5 65 5 4 7 0 4 Hex Socket Hd Bolt 5 4 86 8 3 0 5 85 5 6 2 0 4 Machine Screw W Washer 5 x 30 37 2 0 0 5 20 5 1 5 0 4 Nylock Hex Socket Hd Bolt M4 x 12 97 4 4 0 3 45 3 3 3 0 2 o Ma
20. eck if the driver blade is returned completely e See item 1 Output section piston driver blade etc e Air pressure is too high Nails may be jammed if driven at a high pressure and high speed Check pressure and driving speed Adjust the air pressure to 5 8 5 kgf cm 4 9 8 3 bar 70 120 psi 18 9 2 Possible Causes and Corrections of Air Leakage Air leakage repair location e Repair procedure 1 Check the points of the following parts marked by an asterisk for abnormal condition 2 Next check the seal parts marked with a double circle for wear flaws or damage 3 And then check other places Nail feeder section Control valve section aou Air leakage portion Cause When the Trigger is turned off When the Trigger is turned on A Exhaust port Abnormality in Head Valve A 10 and Cylinder 15 Wear and deformation of the sealed face of the b section o Abnormality in Head Valve O ring P 22 9 or wear deformation and or breakage of Head Valve A 10 e Abnormality damage in the Exhaust Cover 5 o Abnormality in Head Valve A 10 Wear deformation and or breakage of the section a Abnormality in the inner face the section a in the Exhaust Cover 5 Deformation and dust clogging in the section a B Exhaust cover C Nose 1 Feed piston passage E Feed piston F Con
21. et collated nails xe Collating sheets are abnormal deformed or broken eNails are removed from the sheets e Check if the specified nails are used e Check the nails as follows Wire collated nails e Use specified nails e Remove the abnormal nails and load the nailer with proper nails Wire collated nails Unit mm inch D d Li Le 2 5 6 72 0 099 19 37 5 0 236 0 283 0 748 1 476 0 131 Sheet collated nails Unit mm inch D d 5 7 6 0 2 3 2 5 0 224 0 236 0 090 0 099 47 Problem Possible cause x Most common cause Inspection method Remedy 4 Nails jam continued lt Body Nail feeding is incomplete gt e Feeder is worn and the sliding section is abnormal e Nail guide face of the nose or the sliding section of the feeder is abnormal deformed burrs or damaged Feed spring or feeder spring is abnormal damaged fatigued or removed e Open the nail guide and check the position of the feeder claw e Replace the abnormal part lt Body Nail guide section gt e Nail guide section is abnormal e See item 1 Nail guide section See item 1 Nail guide section lt Driver blade is not returned completely gt e See item 1 Output section piston driver blade etc e Perform idle or actual driving to ch
22. ex bar wrench 4 mm e Wrench M5 1 Disassembly and reassembly of the magazine section a Disassembly See Fig 19 Loosen the Hex Socket Hd Bolt M5 x 20 86 and the Nylon Nut M5 69 then remove the Sleeve 70 e Deform Pushing Lever Cover A 71 using a flat blade screwdriver and disengage it from the Nose 22 e Loosen the Machine Screw W Washers M5 x 30 Black 37 of the Body 18 Then the Magazine Ass y 98 can be removed Deform Pushing Lever Cover A by inserting a flat blade screwdriver 28 b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Bend the tip of the Cover 95 and engage it with the convex portion of Magazine A 75 Hold it with Pushing Lever Cover A 71 positioning the Cover 95 outside Pushing Lever Cover A 71 Nylon Nut M5 69 Body 18 a z Bai Screw W Washers M5 x 30 Black 37 Sleeve 70 Pin 76 Nylon Nut M5 69 Pushing Lever Cover A 71 Magazine A 75 Protector B 72 Feeder Shaft Ring 77 Pin 76 Magazine Cover A 78 k Hex Socket Hd Bolt M5 x 20 86 Concave portion Holder Cap A 79 de 9 Nail Holder 81 O ring P 9 62 Holder Shaft A 83 Spring 84 Fit the hole of the Roll Pin D2 5 x 12 82 Cover 95 beween the convex portion of Magazine A 75 and the concave Ratchet Spring 80 porti
23. gulations with which the salespersons should be familiar in order to advise the customer properly Please check your national and or local regulations for applicable items Some applicable items are outlined below The U S A OSHA 1926 102 Eye and Face Protection 1926 302 Power Operated Hand Tools ANSI SNT 101 1993 Portable Compressed Air Actuated Fastener Driving Tools Safety Requirements for cp 7 4 Precautions in Operation 1 Pay special attention to the pressure capacity and piping of the air compressor in order to keep the air pressure supplied to the Model NV 75AG within the range from 5 kgf cm 70 psi 4 9 bar to 8 5 kgf cm 120 psi 8 3 bar Otherwise ill effect may be given to the performance service life and safety of the Model NV 75AG Be sure to install a regulator when using a high pressure air compressor whose set pressure is 10 kgf cm 140 psi 9 8 bar or more In this case adjust the air pressure at 8 5 kgf cm 120 psi 8 3 bar or less 2 If dust in the compressed air settles on the sliding portion the Model NV 75AG will not operate properly Lubrication is effective to remove dust and also to prolong the service life of the Model NV 75AG keeping good performance It is recommended to lubricate the Model NV 75AG daily Supply 5 10 drops of lubricant into the air plug on the Model NV 75AG When not in use for an extended period supply lubricant and perform idle driving two or three times to lubricate the insi
24. ion others Nails or link pieces are jammed e Link pieces are deformed or broken e Check that the magazine is correctly loaded with specified nails Use specified nails e Remove the abnormal nails and load the nailer with proper nails Driving section Nose feeder feed piston etc e Sliding resistance of the feed piston is too high e Remove the feed piston and check the feed piston sliding surface of the nose e Apply grease to the sliding surface Polish the scratched portion with sandpaper Replace the parts Nail guide face of the nose is abnormal deformed burrs or damaged e Feed spring or feeder spring is abnormal damaged or fatigued Feeder is abnormal damaged or worn e Check that the driving section is not abnormal burrs deformed damaged or worn e Deburr the nail guide face e Correct the deformed part e Replace the abnormal parts e Nails are not correctly loaded in the groove of the nose e Check that nails are correctly loaded in the groove of the nose e Load nails in the correct position in the nose e Dust sticks to the feeder sliding portion of the nose or lubrication is needed e Air pressure is too low xe Air passage is clogged with broken pieces of piston bumper etc xe Feed piston chamber contains foreign matter such as broken pieces of piston bumper etc Open the nail guide and perform idle dri
25. ke sure there is no fragment of the Piston Bumper 20 on the passage of the Body 18 and Nose 22 before replacing the Piston Bumper 20 22 10 2 Disassembly and Reassembly of the Output Section See Fig 10 Hex Socket Hd Tool required Bolt M6 x 12 1 Hex bar wrench 4 mm a Disassembly e Remove the Hex Socket Hd Bolts M6 x 12 Plate 2 Top Cover 3 Hex Socket Hd Bolt M5 x 35 4 1 1 with a hex bar wrench 5 mm Then the Top Cover 3 can be removed e Remove the four Hex Socket Hd Bolts M5 x 35 4 with a hex bar wrench 4 mm D SEET and remove the Exhaust Cover 5 Then j the components of the output section such 6 mm 0 236 as Piston H 17 Cylinder 15 and the hole Piston Bumper 20 can be removed Gasket B 6 b Reassembly Disassembly procedures should be Head Bumper 7 followed in the reverse order Note the following points Head Value Spring m e Apply grease to the inside of the O ring I D O Ring P 22 9 37 16 O ring S 70 11 O ring S 46 13 and the Cylinder 15 before reassembly e Mount Gasket B 6 aligning the 6 mm 0 236 dia hole with the blowhole of the Body 18 Head Valve A 10 O Ring S 70 11 Cylinder Plate 12 O Ring S 46 13 O Ring 1AP 48 14 O Ring LD 37 16 E Fig 10 Disassembly and reassembly of the output section zig E e Mount the Cylinder Plate 12 t
26. lace the part is abnormal seized or check the driving e Apply grease damaged or lubrication is operation needed Head valve spring is e Perform idle driving to check e Replace the part abnormal fatigued or that the driver blade is not damaged held in the down position lt Control valve section gt e Replace the abnormal part e Plunger A valve piston B valve bushing A or valve bushing B is abnormal seized or damaged e O rings or sliding surface Disassemble the control e Replace the abnormal part are worn or needs valve section and check the Apply grease lubrication O rings 2 Nails are xe Adjuster is raised too high Check that the adjuster is Turn the adjuster lower driven but for short nails not raised too high lower the pressure bent Nails are not completely fed into the injection port xe Unspecified nails are used See item 1 See item 1 xe Driver blade is worn Check that the driver blade tip is not abnormally worn Replace the part e Workpiece is too hard Check if a nail is bent even when driven into soft wood e Nailer cannot be used because the material is beyond its applicable range 3 Nails cannot be driven into the workpiece completely the heads cannot be made flush e Adjuster is incorrectly set Air pressure is too low e Turn the adjuster to the lowest position and then drive nails e Set the adj
27. ll Pin D4 x 16 25 with a roll pin puller 4 mm dal Then the Feed Piston 64 and Feeder Arm B 26 can be removed e Push out Plunger B 24 with a roll pin puller 4 mm dia Then the Feeder Arm B 26 Feeder 28 and Feed Spring 65 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Before replacing the Piston Bumper 20 clean the passages of the Body 18 and the Nose 22 Fig 24 and the inside of the feed piston chamber Fig 25 If clogged with fragments of the Piston Bumper 20 the Feed Piston 64 will not work properly Piston Bumper 20 Feeder Arm B 26 Roll Pin D4 x 16 25 Split Groove Groove ED END D Wy O Ring P 21 63 Fig 24 Fig 25 e Apply grease to the O ring P 9 62 and O ring P 21 63 and then assemble them e Fill the grease with the groove of the Feed Piston 64 as shown in Fig 25 33 Apply grease to the O ring sliding surface of the Feed Piston 64 and the Nose 22 However be careful not to apply too much grease to the A surface shown in Fig 25 Otherwise the Feed Piston 64 operates improperly at the low pressure e Mount the Roll Pin D4 x 16 25 facing its split toward the magazine as shown in Fig 25 The amount of protrusion at both ends must be equal after reassembly amount of protrusion 1 5 mm Check that the Retaining Ring for D28 Hole 68 is securely inserted into
28. lly upward by the compressed air and seals the upper surface of the exhaust cover and the head valve 4 When the head valve is pushed up the compressed air flows rapidly into the cylinder and pushes down the piston to drive a nail At this time the compressed air flows through the cylinder hole into the return air chamber through air passage B and into the chamber at the left side of the feed piston in the nail feeder section When the air pressure exceeds the force of the feed spring the feeder moves to the right 12 Cylinder Cylinder hole Return air chamber Piston Air passage C Fig 8 During nailing Il Head valve spring Air passage A Air supply vent Head valve Accumulator Cylinder W Piston Valve piston Return air PI A chamber unger A ei ro Trigger Air passage C o Feed spring Feed piston Nail feeder Fig 9 During return 213 3 During nailing Il see Fig 8 1 When the piston moves down inside the cylinder the air below the piston flows through air passage C under the cylinder and is accumulated in the return air chamber together with the compressed air flowing through the cylinder hole 2 When the compressed air in the left chamber of the feed piston moves the feed piston fully to the right the nail feeder feed pawl engages the next nail 4 After nailing see Fig 9 1 When the trigger is released the plunger goes down the air
29. nailing Exhaust cover Head valve spring Valve piston Plunger A Trigger A Pushing lever B Return air chamber Nail feeder section Pushing Feed spring lever A Fig 7 During nailing 1 1 Prior to nailing see Fig 6 1 When compressed air is supplied to the main body it fills the accumulator see diagram 2 At the same time the compressed air flows into the valve piston lower chamber of the control valve section and pushes up the valve piston Also the compressed air flows from the air supply vent through air passage A and into the head valve upper chamber where it simultaneously pushes down the head valve and the head valve spring to seal the upper surface of the head valve and the cylinder 2 During nailing l see Fig 7 1 When plunger A is pushed up by operating both the pushing lever and trigger A the compressed air in the valve piston lower chamber is exhausted from the lower part of plunger A Then the valve piston is pushed down by the compressed air from the accumulator so that it shuts off the air supply vent and releases the exhaust valve 2 When the exhaust valve opens the compressed air in the head valve upper chamber is exhausted into the atmosphere through air passage A 3 The air pressure applied against the lower surface of the head valve soon exceeds the force of the head valve spring and pushes the head valve up The head valve is pushed fu
30. nvex portions of Nail Stopper A 90 and Nail Stopper B 92 in the Stopper Spring A 91 and Stopper Spring B 93 securely Be careful not to mistake Stopper Spring A 91 for Stopper Spring B 93 e After reassembly push Nail Stopper A 90 and Nail Stopper B 92 with fingers to check that they smoothly return to position e Mount the Nail Guide Shaft 29 facing its chamfered side upward e Bend the tip of the Cover 95 and engage it with the convex portion of Magazine A 75 See Fig 19 10 6 Grip Rubber The Model NV 75AG is equipped wih the grip rubber handle that is common to the Model NR 83AA2 However the grip rubber is not supplied as a spare part because it is difficult to detach attach the grip rubber If replacement of the grip rubber is required replace the Body 18 or attach the grip tape How to attach the grip tape and the fixing tape e Grip tape A Code No 881768 e Fixing tape Code No 880407 Grip tape A and the fixing tape are adhesive backed Start wrapping grip tape A near the roll pin hole of the body and wrap around the body completely After wrapping fix grip tape A with the fixing tape at both ends of wrapping Fig 27 Note that grip tape A and fixing tape cannot be removed once they are adhered Wrapping amount 1 5 mm to 3 mm Fixing tape Fixing tape End of grip tape A End of grip tape A Roll pin hole Grip tape A Fig 27 35 11 INSPECTIO
31. o the Cylinder 15 facing the stopper of the Cylinder Plate 12 to the Piston Bumper 20 When mounting to the Body 18 fit the rib of the Body 18 into the stopper groove of the Cylinder Plate 12 Figs 11 and 12 Stopper of the Cylinder Plate 12 Fig 12 e Apply grease to the sliding surface A of the Exhaust Cover 5 and Head Valve A 10 and charge about 0 5 g 0 018 oz of O Ring P 22 9 grease in the groove of the Exhaust Cover Groove of the Top Cover 3 5 Fig 13 Exhaust C 5 Ever e Apply grease to the lip portions and of Head Valve A 10 Fig 21 e Apply grease to O Ring P 22 9 Mount O Ring P 22 9 to Head Valve A 10 then mount it to the Exhaust Cover 5 Head Valve A 10 Exhaust Cover 5 Fig 13 24 10 3 Disassembly and Reassembly of the Control Valve Section See Fig 14 Tools required Roll pin puller 3 mm 0 118 dia a Disassembly e Pull out the Roll Pin D3 x 28 38 with the roll pin puller 3 mm 0 118 dia remove the Pushing Lever Guide 40 and the Trigger 39 Trigger 39 ki ET can be removed Roll Pin D3 x 28 38 Pushing Lever amp gt Head Valve O Ring I D 16 8 52 Guide 40 d 52 gr Valve Bushing B 53 O Ring S 18 54 Lorin I D 8 8 55 O Ring 1 0 11 56 B Valve Piston B 57 O Ring 5 4 48 B Plunger Spring
32. on of Pushing Lever Cover A 71 Fig 19 Disassembly and reassembly of the magazine section KIGE 2 Disassembly and reassembly of nail holder holder shaft etc a Disassembly Pull out the two Pins 76 with a roll pin puller 4 mm dia Then Magazine A 75 and Magazine Cover A 78 can be removed Remove Holder Cap A 79 and Roll Pin D2 5 x 12 82 with a roll pin puller 2 5 mm dia Then O ring P 9 62 Nail Holder 81 Holder Shaft A 83 and Spring 84 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Mount O ring P 9 62 to the top groove of Holder Shaft A 83 e When mounting Holder Shaft A 83 to Magazine A 75 check that the Spring 84 is inserted between the concave portion of Magazine A 75 and the convex portion of Holder Shaft A 83 and then insert the Pin 76 See Fig 20 e Check that the Feeder Shaft Rings 77 2 pcs are securely inserted into the grooves of the Pins 76 2 pcs careful not to lose the Feeder Shaft Ring 77 e Check the following after reassembly e The Nail Holder 81 tilts when opening Magazine Cover A 78 e The Nail Holder 81 housed in Magazine A 75 smoothly when closing Magazine Cover A 78 Convex portion of Holder Shaft A 83 LT A w MAN d Spring 84 Pin 76 Concave portion of Magazine A 75 Fig 20 30
33. ponents of the pushing lever and the Adjuster 44 move smoothly Pushing Lever Guide 40 Adjuster 44 Bent portion of Adjuster Plate A 47 Align the positions 2 Disassembly and reassembly of the adjuster unit a Disassembly See Fig 23 e Remove the Retaining Ring E type for D3 Shaft 51 Then Pushing Lever A 31 Pushing Lever Cover B 80 and the adjuster unit can be removed Pull out the Roll Pin D2 x 16 43 Then the adjuster unit can be disassembled b Disassembly e Disassembly procedures should be followed in the reverse order Note the following points e Mount Adjuster Plate A 47 facing its bent portion toward the Adjuster 44 e Mount Adjuster Plate B 46 facing its convex portion toward Adjsuter Plate A 47 32 Adjuster 44 Adjuster Plate B 46 Adjuster Spring 45 Convex portion Bent portion Bent portion Adjuster Plate A 47 Fig 23 3 Disassembly and reassembly of Piston Bumper 20 Feeder 28 Feed Piston 64 and other parts See Fig 24 a Disassembly e Remove the Nose 22 and the parts forming the pushing lever from the output section in accordance with the procedure in 10 5 1 Then the Piston Bumper 20 can be removed Holding the Feed Piston Cover 67 with fingers remove the Retaining Ring for D28 Hole 68 with a retaining ring puller Then the Feed Piston Cover 67 Bumper 66 and Feed Spring 65 can be removed e Pull out the Ro
34. st Filter 33 T m Cylinder 15 PI H Cap 34 CR Adjuster 44 Piston D FS Bumper E 3 20 a a Nose 22 Feeder 28 vi AM d SES Nail Holder 81 i A 7 Nail Guide 89 982116 75 Pushing Lever A 31 Cover 95 Section A A Nail Guide 89 Feeder Piston 64 Fig 5 Construction Feed Spring 65 10 8 2 Interchangeability of Parts The driving section and the magazine section of the Model NV 75AG have been newly designed and there is no interchangeability with those of the Model NR 65AK Although most parts of the output section and the control valve section of the Model NV 75AG are interchangeable with those of the Model NR 65AK there is no interchangeability for the parts shown in the table below Part NV 75AG NR 65AK Body 18 Dust Filter 33 Gasket B 32 Dust Filter 33 Gasket B 32 A SI Grip rubber dco Air passage hole to Viewed from A feed nails 3 mm dia Gasket B Grip Tape A C Viewed from A Cylinder 15 Upper end surface of the cylinder Bore diameter is concaved Upper end surface of the cylinder Plunger Spring 58 Color Black Plunger A Color Silver Plunger A Trigger 39 Color Yellow Color Black dc 8 3 Operation Principle Air passage A Head valve spring Valve piston B Pushing lever A Fig 6 Prior to
35. supply vent opens the valve piston goes up and the compressed air in the accumulator passes through air passage A into the head valve upper chamber The head valve is then pushed down by the head valve spring and the air pressure against the upper surface of the head valve At the same time the exhaust valve opens and the upper chamber of the cylinder is opened to the atmosphere 2 When the head valve seals the upper surface of the cylinder the compressed air accumulated in the return air chamber passes through air passage C presses on the lower surface of the piston and forces the piston to return upward to its original position Also the compressed air above the piston is exhausted through the head valve hole 3 The compressed air accumulated in the left chamber of the feed piston passes through air passage B goes into the return air chamber and is then exhausted through the nose hole The feed piston is then moved to the left by the force of the feed spring and the feed pawl feeds the next nail into the ejection port This completes one full nailing cycle 9 TROUBLESHOOTING GUIDE 9 1 Troubleshooting and Correction Problem Possible cause x Most common cause Inspection method Remedy 1 Nails cannot be driven Nails e Magazine is not loaded with specified genuine nails e Magazine is loaded with abnormal nails bent nails too large or too small nail heads abnormal collat
36. ted in the Instruction Manual to enhance the safe and efficient use of the tool by the customer Salespersons must be thoroughly familiar with the contents of the Instruction Manual to be able to offer appropriate guidance to the customers during sales promotion 7 2 Warning Label Each Model NV 75AG unit is provided with a Warning Label illustrated below which lists basic safety precautions in its use Carefully ensure that the customers fully understand and follow these precautions before using the A DANGER tool READ AND UNDERSTAND INSTRUCTION AND SAFETY MANUAL before use Failure to follow instructions WILL RESULT IN SERIOUS INJURY OR DEATH eOperator and others in work area MUST WEAR ANSI REQUIRED Z87 17 EYE PROTECTOR WITH SIDE SHIELDS NEVER USE BOTTLED GASES Use regulated air SCH eDO NOT EXCEED 120psi 8 3bar e NEVER CARRY WITH FINGER ON TRIGGER DISCONNECT AIR before servicing unjamming or when not in use cC315808 7 3 Related Laws and Regulations As nailers and staplers are designed to instantaneously drive nails and staples there is an ever present danger of misfiring and subsequent possible serious injury Accordingly close attention in handling is absolutely necessary at all times Carefully ensure that the customer is fully aware of the precautions listed in the Instruction Manual provided with each unit While there are no specific safety regulations there are related items in various general safety re
37. the Nose 22 on the sliding face Abnormality wear breakage and or scratches in O ring P 9 62 of the Nose 22 or wear deformation and or scratches of the Feed Piston 64 on the sliding face Abnormality wear breakage and or scratches in O ring I D 8 8 55 upper side of Valve Piston B 57 2 Abnormality breakage and or scratches in Head Valve O ring 1 0 16 8 52 of Valve Bushing B 53 Abnormality in the upper face the section g of the valve chamber of the Body 18 Air leakage portion G Control valve 2 When the Trigger is turned off When the Trigger is turned on o Abnormality wear breakage and or Abnormality wear breakage and or scratches in O ring I D 1 8 60 of scratches in O ring I D 11 56 in Plunger A 59 the inside of Valve Piston B 57 e Abnormality deformation and or o Abnormality deformation and or scratches of the sliding face of scratches of the sliding face of Plunger A 59 in Valve Bushing A Plunger A 59 in Valve Piston B 61 57 Loosen Hex Socket Hd Bolt M5 x 16 35 e Broken Gasket B 32 Defective seal surface of the Body 18 or Cap 34 24 10 DISASSEMBLY AND REASSEMBLY The items particularly necessary for disassembly and reassembly are described below The Bold numbers in the descriptions below correspond to the item numbers in the Parts List and exploded assembly diagram CAUTION e Befor
38. the groove of the Nose 22 4 Disassembly and reassembly of Nail Guide 89 Nail Stopper A 90 Nail Stopper B 92 and other parts See Fig 26 Tools required Flat blade screwdriver Hex bar wrench 3 mm a Disassembly e Remove the Shaft Ring 85 from the Nail Guide Shaft 29 with a flat blade screwdriver and remove the Nail Guide Shaft 29 Then the Nail Guide 89 and other parts can be removed in an assembly e Remove the Nylock Hex Socket Hd Bolt M4 x 12 97 with a hex bar wrench 3 mm Then the Nail Guide Cover 94 Stopper Spring A 91 Stopper Spring B 93 and Cover 95 can be removed e Remove the Shaft Ring 85 from the Guide Lock 87 with a flat blade screwdriver and pull out the Guide Lock 87 Then Nail Stopper A 90 and Nail Stopper B 92 can be removed Nose 22 Guide Lock 87 SE Shah Ring 85 Spring 88 Yo Pu Nail Guide 89 Nail Stopper A 90 Stopper Spring A 91 Nail Stopper B 92 Nail Guide Shaft 29 mg Teu Stopper Spring B 93 Nail Guide Cover 94 T aft Ring Cover 95 Nylock Hex Socket Hd Bolt M4 x 12 97 Sleeve B 96 Fig 26 Disassembly and reassembly of nail guide nail stopper A nail stopper B and other parts 34 b Resassembly Disassembly procedures should be followed in the reverse order Note the following points e Before reassembly remove dust from the groove of the Nail Guide 89 e Fit the co
39. the internal pe b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Be extremely careful to prevent the entry of foreign particles into the control valve section e Thoroughly apply grease to the O Ring I D 1 8 60 on Plunger A 59 O Rings 1 0 11 56 S 18 54 and S 4 48 on Valve Piston B 57 and the shaft of Plunger A 59 as shown in Fig 17 e As shown in Fig 17 install Valve Bushing A 61 so that the roll pin groove in Valve Bushing A 61 will be aligned with the roll pin hole in the Body 18 First insert a roll pin puller 8 mm 0 118 dia into the roll pin hole Then upon confirming that the puller passes through the hole drive in the Roll Pin D3 x 28 38 If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing A 61 is not aligned with the roll pin hole in the Body 18 it will damage the periphery of Valve Bushing A 61 and prevent disassembly or reassembly Coat the O ring groove s shaft Body 18 Apply grease to the stem with grease Roll pin hole 1 Roll Pin D3 x 28 38 Roll pin e groove Valve Bushing A 61 Valve Bushing A 61 Plunger A 59 Fig 17 e After assembling check that Plunger A 59 moves smoothly 27 10 4 Disassembly and Reassembly of the Magazine Section Tools required Phillips screwdriver e Roll pin pullers 4 mm dia 2 5 mm dia H
40. trol valve 1 e Looseness of the Hex Socket Hd Bolt M5 x 35 4 Damage of Gasket B 6 Abnormality in the sealed face of the Body 18 the Exhaust Cover 5 and the Cylinder 15 Abnormality breakage and or scratches in O Ring S 70 11 of the Cylinder Plate 12 Abnormality in the sealing faces the sections c and or d of the Cylinder Plate 12 Body 18 and or the Cylinder 15 Abnormality wear breakage and or scratches in O ring S 4 48 of Valve Piston B 57 Abnormality wear breakage and or scratches in O ring I D 8 8 55 lower side of Valve Piston B 57 Abnormality breakage and or scratches in O ring S 18 54 of Valve Bushing B 53 Abnormality in the inner face the section h of the valve chamber of the Body 18 e Looseness of the Nylock High Tension Bolt M6 x 20 23 o Scratched and or the broken O ring P 4 21 e Abnormality in the sealed faces of the Body 18 and the Nose 22 o Abnormality deformation crack and or damage of the sections e and f in the Piston Bumper 20 e Deformation of Piston H 17 The deformation of driver blade abnormality in sealed faces The deformation of the face f of the Body 18 Abnormality wear deformation breakage and or scratches in O Ring S 46 13 Abnormality wear breakage and or scratches in O ring P 21 63 of the Feed Piston 64 or the wear and or deformation of
41. uster to the optimum position Adjust the air pressure to 5 8 5 kgf cm 4 9 8 3 bar 70 120 psi e Workpiece is too hard e Check if a nail is bent even when driven into soft wood e Nailer cannot be used because the material is beyond its applicable range 26 Problem Possible cause x Most common cause Inspection method Remedy 3 Nails cannot be driven into the workpiece completely the heads cannot be made flush continued xe Driver blade is worn e Perform idle driving to check the driver blade is projected from the nose tip e Replace the part xe Piston O ring is abnormal worn or damaged Cylinder inside surface is abnormal worn or rough Disassemble the output section and check the piston ring and the inside of the cylinder for abnormality Replace the abnormal part Head valve sliding surface is abnormal seized or damaged or lubrication is needed Check the sliding surface for abnormality and lubrication Replace the abnormal part Apply grease 4 Nails jam Nails xe Unspecified nails are used xe Abnormal nails are mixed xe Nail heads are too large or too small Wire collated nails e Collating wires are abnormal broken welding failed deformed or welding position failed xe Collating wires are deformed deformed in collation angle or collation pitch She
42. ving to check the feeder s operation e Remove dust and then lubricate the sliding surface e Adjust the air pressure to 5 8 5 kgf cm 4 9 8 3 bar 70 120 psi e Remove foreign matter Replace the piston bumper with new one Body Remove foreign matter in the return air chamber chose Remove foreign matter in the air passage and the feed piston chamber 14 Problem Possible cause x Most common cause Inspection method Remedy 1 Nails cannot be driven continued e Air leaks from the gap between the body and the nose e O rings are worn or deformed O rings need lubrication Tighten screws and check the O rings Replace the O rings Apply grease or lubricate Nail guide section Nail guide face is abnormal deformed burrs or damaged e Check that the nail guide is not abnormal worn deformed damaged etc e Correct or replace the parts e Dust sticks to the inside of the nail guide groove or lubrication is needed xe Spring is abnormal missing damaged or fatigued The claw ridge section of the nail stopper is abnormal damaged worn or burrs e Check the operation of nail stopper A and nail stopper B e Rremove dust and then lubricate e Replace the abnormal parts Magazine section Push lever gt e Check that a nail does not catch on another nail in
Download Pdf Manuals
Related Search