COIL NAILER Model NV 45AC
Contents
1. 22 Body Ass y 21 0 157 to 0 197 14105 Head Valve O Ring 16 8 11 Valve Bushing B 55 q x NS Sa Make Bushing 64 Ch Plunger 62 When disassembling do not pull out this part by gripping it with pliers Fig 14 Valve Bushing B 55 Hole Be careful not to Wire with 1 5 to 3 mm dia 0 059 to 0 118 surface Fig 15 99 damage the internal e Pull out the Roll Pin D3 x 18 52 with the roll pin puller 3 mm 0 118 dia and take out the control valve in the following manner 1 Remove the Exhaust Cover 8 by following the procedure in 1 section 10 2 2 As shown in Fig 14 put a 4 to 5 mm 0 157 to 0 197 dia bar in from the upper side of the Body Ass y 21 and push the top of Valve Piston B 59 Now the parts forming the control valve can be taken out except Valve Bushing A 64 and the Head Valve O Ring I D 16 8 11 CAUTIONS Be careful not to damage Valve Piston B 59 Valve Bushings A 64 and B 55 etc Do not pull out the end of Plunger A 62 with pliers 3 To take out Valve Bushing B 55 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 55 as shown in Fig 15 b Reassembly Di2. NV 45AC HITACHI POWER TOOLS TECHNICAL DATA COIL NAILER E NV 45AC SERVICE MANUAL LIST No 1098 Nov 2000 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT CONTENTS Page 1 PRODUCT NAME aaa 1 2 MARKETING OBJECTIVE lui 1 5 illa 1 4 SELLING POINTS uuu sunsu illa 1 wiuzeigevlecme 2 eeu cM 2 EE Ee 3 5 3 CURIOUS 4 eegene 5 6 COMPARISONS WITH SIMILAR 44222 4 6 7 PRECAUTIONS IN SALES PROMOTION U u u uu 7 7 1 Instruction 7 7 2 Warning babel ttr vented reri E ese nup aud 7 7 3 Related Laws and Regulations 8 8 MECHANISM AND OPERATION PRINCIPLE 8 8 1 S 8 8 2 Operation Principle ae 10 9 TROUBLESHOOTING GUIDE uuu u U u uuu u ia 12 9 1 Troubleshooting and Correction ii 12 9 2 Possible Causes and Corrections of Air Leakage i 17 10 DISASSEMBLY AND 19 10 1 General Precautions in Disassembly and Reassembly 19 10 2 Disassembly and Reassembly
3. 883 366 PISTON BUMPER 883 363 BODY ASS Y 955 479 RETAINING RING E TYPE FOR D6 SHAFT NAME PLATE 876 031 O RING S 16 880 674 TRIGGER A 881 846 ADJUSTER SHAFT 881 847 LATCH 316 389 PUSHING LEVER GUIDE 881 811 NAIL GUIDE SHAFT 883 351 WASHER 873 093 O RING 1AP 3 883 362 GUARD 877 371 NYLON NUT M5 883 352 NOSE GUARD 993 041 NYLOCK BOLT W FLANGE M6X25 883 350 NOSE 983 545 NEEDLE ROLLER 949 770 ROLL PIN D4X14 10 PCS 878 132 FEEDER ARM 878 340 FEEDER SPRING 883 357 FEEDER 883 359 PUSHING LEVER A 949 658 HEX SOCKET HD BOLT M5X18 10 PCS 308 386 MACHINE SCREW W SP WASHER M5X16 BLACK 883 361 HANDLE ARM 880 408 GRIP TAPE 880 407 TAPE 880 183 O RING I D 37 2 880 379 CAP 872 035 DUST CAP 876 205 WASHER INCLUD 46 47 a N N lech ech 1 ech ech ech ech N 1 sch 1 ech Lech 1 ech a ech 1 ech lech 1 sch 1 sch 1 sch 1 sch ech 1 ech 1 sch ANA 1 sch ae El sch 1 sch ALTERNATIVE PARTS 8 00 35 5 NV 45AC CODE NO DESCRIPTION REMARKS 949 518 ROLL PIN D3X18 10 PCS 949 539 ROLL PIN D3X25 10 PCS 881 952 TRIGGER PIN 878 881 VALVE BUSHING B 878 885 O RING S 18 878 925 O RING I D 8 8 981 317 O RING 5 4
4. Adjuster Pushing Lever B Spring Pushing Lever Guide Feed Piston O Ring x 2 Spring Bumper Feed Piston Cover Magazine Bushing Exhaust Cover Top Cover Gasket A Head Valve Spring Head Valve O Ring Head Valve A Valve Bushing A Plunger A Plunger Spring Valve Piston B Valve Bushing B O Ring x 7 Piston O Ring Trigger Pin Feeder Arm Feeder Feeder Spring Adjustment Cylinder Body and Valve Cylinder Plate Cylinder Piston Bumper O Ring x 2 Oylinder O Ring Nose Nail Guide Nail Stopper A B Guide Lock Nail Guide Cover Magazine Magazine Cover Nail Holder Body Ass y E39 HITACHI PNEUMATIC TOOL PARTS LIST NAILER 2000 8 25 Model 45 E1 LIST NO 1098 DE G oe NN ANNAN 34 PARTS NV 45AC CODE NO DESCRIPTION REMARKS 949 819 HEX SOCKET HD BOLT M5X10 10 PCS 944 260 WASHER 881 841 TOP COVER 881 840 HEAD RING 883 369 PROTECTOR 883 368 HEX SOCKET HD BOLT M5X22 883 367 BODY GUARD 881 879 EXHAUST COVER 881 839 GASKET A 881 851 HEAD VALVE SPRING 877 699 HEAD VALVE O RING 16 8 881 837 HEAD VALVE A 883 365 O RING 1BP 28 883 364 PISTON 990 067 O RING 1AS 50 881 831 CYLINDER PLATE 984 483 O RING S 36 881 864 CYLINDER O RING 881 829 CYLINDER
5. isd 0 0 isd 021 OZ zWw9 DY 9 6 8 6 419 03 8 6 219 164 678 9 12969 Gb Jeq 68 6 68 67 leq 69 6 Jeq 9 6v HOST NO 6 ASTNY avsv AN OVSY AN oe euru jepow HV IWIS HLIM SNOSIHVdWOO 9 7 PRECAUTIONS SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NV 45 AC 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 the 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 listed in the Instruction Manual to enhance the safe 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 Eac
6. Piston 73 is abnormal worn broken or damaged or the Nose 36 is worn deformed or scratched on the sliding surface The O Ring P 9 72 in the Nose 36 is abnormal worn broken or damaged or the Feed Piston 73 is worn deformed or scratched on the sliding surface F Control valve The O Ring 60 on Valve Piston B 59 is abnormal worn broken or damaged The lower O Ring 57 on Valve Piston B 59 is abnormal worn broken or damaged The O Ring 5 18 56 on Valve Bushing B 55 is abnormal broken or damaged x The inside surface of the valve chamber of the Body Ass y 21 is abnormal The upper O Ring 57 on Valve Piston B 59 is abnormal worn broken or damaged The Head Valve O Ring 11 on Valve Bushing B 55 is abnormal broken or damaged The top surface of the valve chamber of the Body Ass y 21 is abnormal portion G Control valve 11 The O Ring 63 on Plunger A 62 is abnormal worn broken or damaged e Valve Bushing 64 is abnormal sliding surface of Plunger A 62 is deformed or scratched The inside of the O Ring 5 4 58 on Valve Piston B 59 is abnormal worn broken or damaged e Plunger 62 is abnormal sliding surface is deformed or scratched H Cap The O Ring 48 is abnormal worn broken or damaged e The 49 is loose The seal surface of the Body A
7. Valve piston lower chamber Plunger A 62 Fig 8 Control valve section cuis 9 TROUBLESHOOTING GUIDE 9 1 Troubleshooting and Correction Problem Possible cause most common cause Inspection methods 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 collation others e Nails or link pieces are jammed e Link pieces are deformed or broken e Check that the magazine is correctly loaded with specified nails e Use specified nails e Remove the abnormal nails and load the nailer with proper nails lt Driving section Nose feeder feed piston etc gt Sliding resistance of the feed piston is too high Remove the feed piston and check the feed piston sliding surface of the nose 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 Spring or feeder spring is abnormal damaged or fatigued Feeder is abnormal damaged or worn 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 Nails are not correctly loaded in the groove of the nose e Check
8. deformed or damaged Disassemble the cylinder plate and check for abnormality Replace the abnormal part Head valve sliding surface is abnormal seized or damaged or lubrication is needed e Check the sliding surface for abnormality and lubrication e Replace the abnormal part Apply grease 4 Nails jam lt Nails gt Unspecified nails are used xe Abnormal nails are mixed x Nail heads are too large or too small Collating wires are abnormal broken welding failed deformed or welding position failed xe Collating wires are deformed deformed in collation angle or collation pitch e Check if the specified nails are used Check the nails as follows Use specified nails e Remove the abnormal nails and load the nailer with proper nails UNIT mm inch Type Li Le 7 16 0276 0 630 7 25 0 630 0 984 EE MED Problem Possible cause most common cause Inspection methods Remedy 4 Nails jam continued Body Nail feeding is incomplete Feeder is worn and the sliding section is abnormal Nail guide face of the nose or the sliding section of the feeder is abnormal deformed burrs or damaged e Spring or feeder spring is abnormal damaged fatigued or removed e Open the nail guide and check the position of the feeder claw Check that the feeder claw holds a
9. 89 is securely fitted in the groove of the Hinge Pin 90 5 Disassembly and reassembly of the Nail Holder 99 and the Magazine Guard 103 See Fig 25 a Disassembly e Open the Magazine Cover 102 and remove the Machine Screw M4 x 40 96 with a Phillips screwdriver Then the Nail Holder 99 and the Holder Spring 98 can be removed e Holding the U Nut M5 105 with a socket wrench 8 mm remove the two Hex Socket Hd Bolts M5 x 12 100 with a hex bar wrench 4 mm Then the Magazine Guard 103 can be removed b Reassembly e Disassembly procedures should be followed in the reverse order EN 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY Check that Plunger A 62 moves smoothly 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 the Adjuster Knob 68 to the deepest position e Recheck the tightening torque of each screw e Check that Pushing Lever A 42 slides smoothly Check that the machine will not operate only by pulling Trigger 25 Also check that the machine will not operate only by depressing Pushing Lever A 42 99 12 STANDARD REPAIR TIME UNIT SCHEDULES MODEL Variable Fixed 10 20 30 40 50 60 min General Assembly Work Flow Pushing Lever A
10. NA 1 ech 1 sch 1 ech PARTS NV 45AC CODE NO DESCRIPTION REMARKS 878 163 MAGAZINE GUARD 876 465 NYLON NUT M4 945 255 U NUT M5 883 360 MAGAZINE ASS Y INCLUD 89 105 STANDARD ACCESSORIES CODE NO DESCRIPTION REMARKS 944 459 HEX BAR WRENCH 5MM 944 458 HEX BAR WRENCH 4MM 875 769 EYE PROTECTOR 882 414 LEAFLET 881 976 CAUTION TAG OPTIONAL ACCESSORIES CODE NO DESCRIPTION REMARKS 881 973 SEQUENTIAL TRIP MECHANISM SET 881 835 MUFFLER ALTERNATIVE PARTS Printed Japan 8 00 a 000825
11. O ring 11 is abnormal worn deformed or damaged Head Valve A 12 is abnormal worn deformed or damaged Head Valve A 12 is abnormal a portion is worn deformed or broken x The Exhaust Cover 8 is abnormal a portion is deformed or clogged with dust B Exhaust cover e Hex Socket Hd Bolt M5 x 22 6 is loose Gasket A 9 is damaged The seal surface of the Body Ass y 21 or the Exhaust Cover 8 is abnormal e Air leakage points Possible cause With control valve OFF With control valve ON Nose 1 The O Rings 24 31 of the Body Ass y 21 are abnormal broken or damaged e The Nylock Bolt W Flange M6 x 25 35 is loose e The seal surface of the Body Ass y 21 or the Nose 36 is abnormal broken deformed or scratched D Nose The Cylinder O Ring 1AS 50 15 of the Cylinder Plate 16 is abnormal broken or damaged The O Ring 5 36 17 of the Cylinder 19 is abnormal broken or damaged The seal surface of the Body Ass y 21 Cylinder Plate 16 or Cylinder 19 is abnormal C or d portion The Piston Bumper 20 is abnormal amp or D portion is damaged deformed or cracked e The Piston 14 is abnormal driver blade or sealed face is deformed The f surface of the Body Ass y 21 is deformed E Feed piston The O Ring P 18 74 on the Feed
12. make sure that they smoothly return to position 28 10 5 Disassembly Reassembly of the and the Magazine Section 1 Disassembly and reassembly of the Cap 49 See Fig 24 Tool required e Wrench 23 mm a Disassembly e The Cap 49 has an M42 mm screw portion Hold the two flat portions of the Cap 49 with a wrench 23 mm and turn the Cap 49 to remove it b Reassembly e Disassembly procedures should be followed in the reverse order Apply grease to the O Ring 1 0 37 2 48 before reassembly p D O Ring I D 37 2 48 Body Ass y 21 Fig 24 Disassembly and reassembly of the cap 29 2 Disassembly and reassembly of the magazine section See Fig 25 Tools required e Phillips screwdriver e Flatblade screwdriver Roll pin puller 3 mm 0 118 dia Socket wrench 8 mm Hex bar wrench 4 mm Machine Screw W Sp Washer M5 x 16 Black 44 Nylon Nut M5 33 Stopper Pin 94 Retaining Ring E Type for D3 Shaft 89 bx 95 Machine Screw M4 x 40 96 m 97 Holder Spring 98 Nail Holder 99 45 Hex Socket Hd Bolt M5 x 12 100 Sleeve 101 Retaining Ring E Type for D3 Shaft 89 Magazine Cover 102 Hinge Pin 90 Fig 25 Disassembly and reassembly of the magazine section 30 Disassembly e Remove the Machine Screw W Sp Washer M5 x 16 Black 44 with the Phillips
13. of the Output Section 20 10 3 Disassembly and Reassembly of the Control Valve Section 22 10 4 Disassembly and Reassembly of the Driving Section ii 25 10 5 Disassembly Reassembly of the Cap and the Magazine Section 29 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY 32 12 STANDARD REPAIR TIME UNIT 5 22 22 011 nnns 33 Appendix Assembly Diagram for NV45AG aa 34 1 PRODUCT Hitachi 1 3 4 Coil Nailer Model NV 45AC 2 MARKETING OBJECTIVE The current Model NV 45AB coil nailer is well reputed in the U S A market as a roofing nailer suitable for roofing asphalt shingles in building construction However competitively priced roofing nailers have been put on the U S A market recently The newly developed Model NV 45AC is specifically designed for roofing asphalt shingles and weighs just 1 7 kg 3 7 lbs Please expand our market share with the new Model NV ADAC The Model NV 45AC is a medium duty roofing coil nailer capable of asphalt shingles with 25 45 mm length nails after heavy duty Model NV 45AB for 22 45 mm length nails 3 APPLICATIONS Installation of asphalt roofing shingles in building construction 4 SELLING POINTS Lightweight 1 7 kg 3 7 lbs for easy on
14. reverse order Note the following points Align the dihedral width portion and the radius portion of the Latch 27 to the window of Pushing Lever 70 when reassembling Fig 19 e Mount the Adjuster 71 and the Adjuster Knob 68 as shown in Fig 20 Apply the supplied oil Hitachi pneumatic tool lubricant to Pushing Lever B 70 and the Bolt Washer 4 65 before reassembly e After reassembly check that the Adjuster 71 and Pushing Lever B 70 operate smoothly 26 Window of Radius portion Pushing Lever B 70 Dihedral width portion of the Latch 27 Mount the Adjuster Knob 68 in this orientation Adjuster 71 Fig 19 Fig 20 3 Disassembly and reassembly of the Feeder 41 Feed Piston 73 etc See Fig 17 a Disassembly e Remove the Magazine Ass y 106 and the Guard 32 by following the procedure in 1 section 10 4 e Holding the Feed Piston Cover 77 with a finger to prevent jumping of the Spring 75 remove the Retaining Ring for D24 Hole 78 with a puller for retaining ring C type for hole Then the Feed Piston Cover 77 the Bumper 76 and the Spring 75 can be removed Pull out the Roll Pin D4 x 14 38 with a roll pin puller 4 mm 0 157 dia Then the Feed Piston 73 and the Feeder Arm 39 can be removed Push out the Needle Roller 37 with a roll pin puller 4 mm 0 157 dia Then the Feeder Arm 39 the Feeder 41 and the Feeder Spring 40 ca
15. screwdriver Then the Magazine Ass y 106 can be removed b Reassembly e Disassembly procedures should be followed in the reverse order 3 Disassembly and reassembly of the Magazine Stopper 93 See Fig 25 a Disassembly e Insert the tip of a flatblade screwdriver in the clearance between the Magazine 95 and the Magazine Stopper 93 and remove the Retaining Ring E Type for D3 Shaft 89 Holding the Magazine Stopper 93 with a finger to prevent jumping of the Stopper Spring 92 push out the Stopper Pin 94 by using a roll pin puller 3 mm 0 118 dia Then the Magazine Stopper 93 and the Stopper Spring 92 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Check that the Retaining Ring E Type for D3 Shaft 89 is securely fitted in the groove of the Stopper Pin 94 4 Disassembly and reassembly of the Magazine Cover 102 See Fig 25 a Disassembly e Insert the tip of a flatblade screwdriver in the clearance between the Magazine 95 and the Magazine Cover 102 and remove the Retaining Ring E Type for D3 Shaft 89 Push out the Hinge Pin 90 by using a roll pin puller 3 mm 0 118 dia Then the Magazine Cover 102 and other parts can be removed in an assemble state b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Check that the Retaining Ring E Type for D3 Shaft
16. 880 672 VALVE PISTON B 878 887 O RING I D 11 878 884 PLUNGER SPRING 880 673 PLUNGER A 878 888 O RING I D 1 8 880 671 VALVE BUSHING A 949 429 BOLT WASHER 10 PCS 881 853 ADJUSTER SPRING 878 222 ROLL PIN D1 6X12 881 848 ADJUSTER KNOB 881 882 SPRING 881 843 PUSHING LEVER B 881 845 ADJUSTER 872 645 O RING 9 883 358 FEED PISTON 873 570 O RING P 18 880 409 SPRING 877 476 BUMPER 880 170 FEED PISTON COVER 983 748 RETAINING RING FOR D24 HOLE 880 177 MAGAZINE BUSHING 874 436 O RING P 4 878 103 GUIDE LOCK 880 446 SPRING 883 353 NAIL GUIDE 883 354 NAIL STOPPER A 880 393 SPRING 883 355 NAIL STOPPER B 883 356 NAIL GUIDE COVER 880 830 NYLOCK HEX SOCKET HD BOLT M5X12 872 971 RETAINING RING E TYPE FOR D3 SHAFT 877 152 HINGE PIN 880 450 WARNING LABEL 877 149 STOPPER SPRING 880 146 MAGAZINE STOPPER 877 150 STOPPER PIN 878 158 MAGAZINE 949 228 MACHINE SCREW 4 40 10 PCS 875 246 WASHER 877 894 HOLDERSPRING 878 159 NAIL HOLDER 949 765 HEX SOCKET HD BOLT M5X12 10 PCS 878 164 SLEEVE 878 161 MAGAZINE COVER 8 00 ALTERNATIVE PARTS 36 NN 1 sch N N 1 sch ech ech L 1 sch 1 sch A sch 1 sch 1 ech mm wma 1 sch 1 sch 1 ech
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18. a workpiece single shot operation Please recommend the sequential trip mechanism kit to customers who may want to use it Salespersons must instruct the customers to read thoroughly the Instruction Manual attached to the sequential trip mechanism kit and also the Handling Instructions of the Model NV 45AC for correct use 2 Muffler The muffler is provided as an optional accessory for the Model NV 45AC By mounting this muffler the exhaust sound is reduced by about 10 dB A Please recommend the muffler to customers who may want to use it The muffler can be mounted according to the following procedure as shown in Fig 3 1 Remove the hex socket hd bolt M5 x 10 2 Put the muffler in the head ring with the convex side facing the top cover 3 Fit the convex portion of the exhaust cover in the concave portion of the top cover 4 Secure it with the hex socket hd bolt M5 x 10 Hex socket hd bolt Washer Top cover Concave portion of top cover Convex portion of muffler Muffler Convex portion of exhaust cover Exhaust cover Head ring Fig 3 Mounting of muffer P 8 1 6 1 9 2 2 1 1 8 1 8 1 8 GE bou Gp EL Gp ge 6 Gp WW Gp zc Gp 020 02 0 ww go e uozo go e 020 02 0 yueus G OL 68 0 86
19. d air in the head valve chamber is discharged into the atmosphere through the air passage 3 When the air pressure applied on the bottom surface of Head Valve A 12 overcomes the strength of the Head Valve Spring 10 Head Valve A 12 is pushed upward At this time Head Valve A 12 seals the Exhaust Cover 8 blocking the passage to the exhaust vent 4 When Head Valve A 12 goes up the compressed air in the accumulator flows rapidly into the Cylinder 19 forcing the Piston 14 downward to strike the nail When the Piston 14 passes the cylinder hole the compressed air flows into the return air chamber and is accumulated there Exhaust Cover 8 Head valve chamber Exhaust vent Head Valve Air passage Spring 10 Control valve Head Valve A section Piston 14 Accumulator Cylinder hole Cylinder 19 Return air chamber Pushing Lever A 42 To the head valve chamber Air passage E Air supply vent Accumulator i Exhaust i valve Valve Piston B 59 Valve piston lower chamber Plunger A 62 Fig 6 Control valve section 240 3 During return Fig 7 and Fig 8 1 When Pushing Lever A 42 or Trigger A 25 is released Plunger A 62 goes down and the compressed air in the accumulator flows into the valve piston lower chamber 2 As the air pressure in the valve piston lower chamber increases to overcome the air pressure applied o
20. e Ass y 106 Remove the Machine Screw W Sp Washer M5 x 16 Black 44 with a Phillips screwdriver and then remove the Guard 32 from the Nose 36 e Remove the two Nylock Bolts W Flange M6 x 25 35 from the Nose 36 with a hex bar wrench 5 mm Now the Nose Guard 34 the Nose 36 and Pushing Lever A 42 can be removed e Pull out the Roll Pins D3 x 18 52 and D3 x 25 53 with a roll pin puller 3 mm 0 118 dia Then the Pushing Lever Guide 28 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Before reassembly check that the end of Pushing Lever A 42 is inserted in the opening of the Pushing Lever Guide 28 securely as shown in Fig 18 e After reassembly check that Pushing Lever A 42 operates smoothly gt PAG GF30 lt Opening of the Pushing Lever Guide 28 End of Pushing Lever A 42 2 Disassembly and reassembly of the adjuster section See Fig 17 a Disassembly e Remove the Pushing Lever Guide 28 by following the procedure in 1 section 10 4 Pull out the Roll Pin D1 6 x 12 67 with a roll pin puller 1 5 mm 0 059 dia Then the Adjuster Knob 68 the Adjuster Spring 66 the Bolt Washer M4 65 the Latch 27 the Adjuster Shaft 26 the Spring 69 Pushing Lever B 70 and the Adjuster 71 can be removed b Reassembly Disassembly procedures should be followed in the
21. e handed operation Rubber protector protects tool and prevents sliding Exhaust direction easily changeable Rubber grip for comfort and temperature protection E E E Nailing depth adjustment mechanism with an easy to see calibrated dial 5 SPECIFICATIONS 5 1 Specifications Model NV 45AC Driving system Reciprocating piston type Operating pressure 4 9 8 3 bar 5 8 5 kgf cm 70 120 psi Gauge pressure Length x Height x Width Driving speed 3 nails sec Weight 1 7 kg 3 7 lbs Dimensions 241 mm x 269 mm x 124 mm 9 1 2 x 10 19 32 x 4 7 8 Nail feed system Spiral spring Nail capacity 120 nails 1 coil Air consumption 1 0 Itr cycle at 6 9 bar 1 0 Itr cycle at 7 kgf cm 0 035 ft cycle at 100 psi Air inlet 3 8 NPT thread Packaging Corrugated cardboard box Package dimensions Length x Height x Width 280 mm x 290 mm x 150 mm 11 1 32 x 11 13 32 x 5 29 32 Standard accessories Eye protector Code 875769 kuwa DC KREE Eeer ta 1 Hex bar wrench for M6 screw Code No 944459 ie 1 Hex bar wrench for 5 screw Code 944458 eee 1 Optional accessories Sequential trip mechanism kit Single shot Code No 881973 Muffler Code No 881835 Shingle guide e Shingle guide Code No 878175 e Guide base C
22. e the parts Correct or replace the part BE te Problem Possible cause x most common cause Inspection methods Remedy 1 Nails cannot be driven continued Cylinder inside surface is abnormal packed with dust or worn Check that nails can be driven at 4 9 bar 5 kgf cm 70 psi e Remove dust and then lubricate e Replace the part Head valve sliding surface is abnormal seized or damaged or lubrication is needed e Perform idle driving to check the driving operation Replace the part e Apply grease Head valve spring is abnormal fatigued or damaged lt Control valve section gt Plunger A valve piston valve bushing A or valve bushing B is abnormal seized or damaged e Perform idle driving to check that the driver blade is not held in the down position e Replace the part e Replace the abnormal part O ring or sliding surface is worn or needs lubrication e Disassemble the control valve section and check the O rings e Replace the abnormal part e Apply grease 2 Nails are driven but bent Adjuster is raised too high for short nails e Check that the adjuster is not raised too high e Turn the adjuster lower lower the pressure Nails are not completely fed into the injection port Unspecified nails are used See item 1 See item 1 xe Driver blade i
23. eassembly of the Driving Section See Fig 17 Tools required e Hex bar wrench 5 mm Machine Screw W Sp Washer Roll pin puller 1 5 mm 0 059 TO ASIA 94 3 mm 0 118 and 4 mm 0 157 dia e Phillips screwdriver Puller for retaining ring C type for hole Nylon Nut 5 33 Body Ass y 21 Adjuster Shaft 26 Roll Pin D3 x 25 53 Magazine Ass y 106 Bolt Washer M4 65 Adjuster Spring 66 Roll Pin 01 6 x 12 67 Adjuster Knob 68 Roll Pin D3 x 18 52 Latch 27 Pushing Lever Guide 28 Spring 69 Pushing Lever B 70 SI Washer 30 Magazine Bushing 79 O Ring 1AP 3 31 71 Retaining Ring for D24 ei Hole 78 Feed Piston Cover 77 Bumper 76 Spring 75 O Ring P 18 74 Feed Piston 73 O Ring P 9 72 Guard 32 Nylon Nut M5 33 Nose Guard 34 Nylock Bolt W Flange M6 x 25 35 Nose 36 Needle Roller 37 Roll Pin D4 x 14 38 Machine Screw W Sp Washer M5 x 16 Black 44 Feeder Arm 39 Feeder Spring 40 Feeder 41 Pushing Lever A 42 Fig 17 Disassembly and reassembly of the driving section 25 1 Disassembly and reassembly of the 36 Pushing Lever A 42 Pushing Lever Guide 28 etc See Fig 17 a Disassembly e Remove the Machine Screw W Sp Washer M5 x 16 Black 44 with a Phillips screwdriver and then remove the Magazin
24. ece of hemlock with the Model NV 45AC a pressure of about 6 9 bar 7 kgf cm 100 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 2 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 kgf cm kgf cm ft lb J i i j 40 50 5 CN450R Bostitch N63CP 30 ib i Porter Cable RN175 ____ 400 Senco SCN40R Hitachi NV 45 K x 200 100 8 3 bar Ly a ________ __ 9 0 15 0 20 025 30 0 35 in 4 5 6 7 8 85 La kgf cm TE E 60 70 80 90 100 110 120 psi 9 Nail d x L Air pressure setting to drive nail flush with NV45AC x x x x mm x mm z R SS R s a o s e d E E E E N E E E E L o SS F x x LO 1i 2 e Fig 2 Required nailing energy and nailer output energy 5 4 Optional Accessories 1 Sequential trip mechanism kit The sequential trip mechanism kit is provided as an optional accessory for the Model NV 45AC When using this optional accessory a nail is driven by pressing the push lever first against a workpiece and then pulling the trigger and nail is driven when pulling the trigger first and then pressing the push lever against
25. ex Socket Hd Bolt M5 43 8 3 0 5 85 5 6 1 0 4 Hex Socket Hd Bolt M 116 6 3 0 5 65 5 4 7 0 4 Hex Socket Hd Bolt M5 100 2 0 0 3 20 3 1 5 0 2 Machine Screw W Sp Washer M5 44 2 0 0 5 20 5 1 5 0 4 Machine Screw 96 0 5 1 0 5 10 0 36 0 72 CAD p 49 24 5 4 9 250 50 18 3 6 ze 10 2 Disassembly and Reassembly of the Output Section See Fig 9 Hex Socket Hd Tool required _ e Hex bar wrench 4 mm Washer 2 a Disassembly Top Cover 3 e Remove the Hex Socket Hd Bolts M5 x 10 1 with a hex bar wrench 4 mm Then the Top Cover 3 the Head Ring 4 and the Protector 5 can be removed Head Ring 4 Protector 5 Hex Socket Hd Bolt M5 x 22 6 e Remove the four Hex Socket Hd Bolts 5 x 22 6 with a hex bar wrench 4 mm and remove the Exhaust Cover 8 Then Body Guard 7 Exhaust Cover 8 the components of the output section such as the Piston 14 Cylinder 19 and the 6 mm 0 236 Piston Bumper 20 can be removed Gasket A 9 Hole Head Value Spring b Reassembly 10 Head Value O Ring lt followed in the reverse order Note the 16 8 11 Head Value A 12 Disassembly procedures should be following points A
26. grease to the Head Valve O Ring dar tar tar ar o EE DID 8 e Fit the portion of the Exhaust Head Valve A 12 Exhaust Cover 8 Cover 8 in the concave portion of the Fig 11 Top Cover 3 Fig 11 io x 10 3 Disassembly and Reassembly of the Control Valve Section See Fig 12 Retaining Ring E Type for D6 Shaft 22 8 Body Ass y 21 Roll Pin D3 x 18 52 Head Valve O Ring 16 8 11 Valve Bushing B ssi O Ring S 18 56 O Ring 1 0 8 8 P E O Ring 5 4 58 3 Valve Piston B O Ring 1 0 11 60 Plunger Spring cui Plunger A i O Ring I D 1 8 81 e Valve Bushing A 64 Remove Trigger A 25 Force down Screwdriver 27 LY Tools required e Flatblade head screwdriver e Roll pin puller 3 mm 0 118 dia e Hex bar wrench 4 mm Trigger A 25 SH Cry Trigger Pin 54 a Disassembly Remove the Retaining Ring E Type for D6 Shaft 22 with the blade of a screwdriver and remove the Trigger Pin 54 and Trigger A 25 can be removed To remove Trigger A 25 together with the driving section Pushing Lever B 70 the Nose 36 etc remove Trigger A 25 while forcing down Plunger A 62 with the blade of a screwdriver as shown in Fig 13 Pushing Lever B 70 Plunger A 62
27. h Model NV 45AC unit is provided with a Warning Label illustrated below which lists basic safety precautions in its use Carefully ensure that customers fully understand and follow these precautions before using the tool DANGER READ INSTRUCTION MANUAL before use Failure to follow instructions WILL RESULT IN SERIOUS INJURY e Operator and others in work area MUST WEAR ANSI REQUIRED gt AN EYE PROTECTOR eNEVER USE BOTTLED GASES Use regulated air only 00 NOT EXCEED 120psi 8 3bar Wh eNEVER CARRY WITH FINGER ON TRIGGER eDISCONNECT AIR before servicing C315887 unjamming or when not in use 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 regulations with which the salespersons should be familiar in order to properly advise the customer 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 Compre
28. n be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Before reassembly remove foreign matter such as broken pieces of the Piston Bumper 20 from the passage between the Body Ass y 21 and the Nose 36 Fig 21 and the feed piston chamber Fig 22 completely for smooth operation of the Feed Piston 73 Roll Pin Piston Bumper 20 Feeder Arm 39 D4 x 14 38 Feed Piston 73 Nose 36 Split Groove Groove Retaining Ring for a SE 21 Ek D24 Hole 78 sey 21 Passage 301 gt Magazine Bumper 76 nose 36 O Ring 1AP 3 31 O Ring P 18 74 Feed piston chamber Passage Fig 21 Fig 22 e Apply grease to the O Ring P 9 72 and O Ring P 18 74 before reassembly e Charge grease in the groove of the Feed Piston 73 Fig 22 Pansy ee e Apply grease to the O ring sliding surface of the Feed Piston 73 and Nose 36 before reassembly Be careful not to apply too much grease to the A surface Fig 22 Too much grease can impair the operation of the Feed Piston 73 at low pressure e Put the Roll Pin D4 x 14 38 in the Feeder Arm 39 facing the split to the magazine as shown in Fig 22 Check that the Retaining Ring for D24 Hole 78 fits securely in the groove of the Nose 36 4 Disassembly and reassembly of the Nail Guide 83 Nail Stoppers A 84 and B 86 etc See Fig 23 Tools req
29. n the upper portion of Valve Piston B 59 Valve Piston B 59 is forced upward When this occurs the exhaust valve is closed and the air supply vent is opened 3 When the air supply vent opens the compressed air in the accumulator passes through the air passage and flows into the head valve chamber to push down Head Valve A 12 As a result Head Valve A 12 and Cylinder 19 are sealed and at the same time Head Valve A 12 and Exhaust Cover 8 are released to open the exhaust vent 4 The compressed air at the upper portion of the Piston 14 is discharged into the atmosphere through the exhaust vent In this way the air pressure at the upper portion of the Piston 14 is reduced and the greater pressure of the air accumulated in the return air chamber pushes the Piston 14 upward 5 If the air pressure at the lower portion of the Piston 14 is higher than that of the atmosphere after the Piston 14 has fully returned the excess air pressure is discharged into the atmosphere through the clearance between the Piston Bumper 20 and the driver blade Head Valve A 12 Pushing Lever A 42 Exhaust Cover 8 Exhaust vent ES Head valve chamber Air passage Control valve section Cylinder 19 Return air chamber Piston 14 Piston hn d Trigger A 25 Bumper 20 Driver blade To the head valve chamber Air supply vent Air passage Accumulator
30. nail and the first nail is positioned in the injection port Check that the second claw holds the nail shaft and feeds it e Replace the abnormal part lt Body Nail guide section gt e Nail guide section is abnormal e See item 1 Nail guide section e 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 check if the driver blade is returned completely e See item 1 Output section piston driver blade etc Air pressure is too high e Nails may be jammed if driven at a high pressure and high speed Check pressure and driving speed Adjust the air pressure to 4 9 8 3 bar 5 8 5 kgf cm 70 120 psi 16 9 2 Possible Causes and Corrections of Air Leakage Air leakage repair location Nail feeder section 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 Control valve section Air leakage points Possible cause With control valve OFF With control valve ON A Exhaust port O Head Valve A 12 and Cylinder 19 are abnormal seal surface of the b portion is worn or deformed The Head Valve
31. ode No 878176 e Washer Code No 949424 e Plate nut Code No 878213 e Hexagon socket hd bolt M5 x 16 Code No 949819 Pneumatic tool lubricant 1 oz feeder Code 877153 Pneumatic tool lubricant 4 oz oil feeder Code No 872042 Pneumatic tool lubricant 1 quart can Code No 876212 5 2 Selection The Model NV 45AC utilizes roofing nails which are common round head nails collated by wire into coils from 120 nails Applicable nail dimensions are shown below However it is recommended to use genuine HITACHI nails to ensure satisfactory driving quality For nail length 22 mm 7 8 recommend the Model NV 45AB instead of this Model NV 45AC CAUTION Ensure that nails are as specified in Fig 1 Other nails will cause clogging of nails and subsequent damage to the nailer Wire collated nails Min Max 10 5m 10 5 0 413 0 413 E gt E 5 LO N 3 05 mm 0 120 3 05 0 120 Fig 1 Dimensions of nails 5 3 Nail Driving Force Fig 2 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 05 mm dia x 45 mm length 0 120 x 1 3 4 into a workpi
32. pply grease to the inside of the O ring 1BP 28 13 O ring S 36 17 O ring 1AS 15 15 and the Cylinder 19 before O Ring 1BP 28 13 Piston 14 reassembly e Mount the Cylinder Plate 16 aligning the O Ring 5 50 15 triangle mark with the mark on the Body Cylinder Plate 16 Ass y 21 as shown in Fig 10 Mount the Gasket A 9 aligning the 6 mm 0 236 dia hole with the blowhole of the Body Ass y 21 O Ring S 36 17 Cylinder O Ring 18 Triangle mark on the Cylinder Plate 16 Mark on the Cylinder 19 Piston Bumper 20 Body Ass y 21 Cylinder Plate 16 Ass y 21 Fig 9 Disassembly and reassembly of the output section Fig 10 20 Head Valve O Ring a LD 16 8 11 Top Cover 3 Concave portion of Apply grease to the sliding surface A of the Top Cover 3 the Exhaust Cover 8 and Head Valve A 12 and charge about 0 5 g 0 018 oz of SEN NN LOTTA grease in the groove of the Exhaust Cover 8 Fig 11 YN fe emm PY Az A i e Apply grease to the lip portions B and lt EN NS C of Head Valve A 12 Fig 11 Groove of the Exhaust Cover 8 AE a Convex portion of the Exhaust Cover 8 1 0 16 8 11 Mount the Head Valve O Ring I D 16 8 11 to Head Valve A 12 then mount it to the Exhaust Cover PIZZI SES e Apply
33. rotector 5 Top Cover 3 Exhaust Vent Plunger A 62 Valve Bushing A 64 Head Ring 4 Exhaust Control valve Body Ass y 21 Cap 49 Cover 8 section Accumulator Piston 14 Drive Blade Cylinder 19 Piston Bumper 20 Adjuster 71 Nose 36 Guard 32 Magazine Stopper 93 Feeder 41 Pushing Lever A 42 Guide Lock 81 Nail Guide 83 Feed Piston 73 Feeder 41 SERGE Fig 4 Construction 8 2 Operation Principle 1 Before nailing Fig 5 and Fig 6 1 When compressed air is fed to the main body it fills the accumulator 333 2 At the same time the compressed air flows into the valve piston lower chamber of the control valve section and forces Valve Piston B 59 upward Also the compressed air is fed through the air supply vent and air passage to the head valve chamber As a result the Head Valve Spring 10 is pushed down together to seal Head Valve A 12 and Cylinder 19 2 When nailing Fig 5 and Fig 6 1 When Pushing Lever A 42 and Trigger A 25 are operated together and Plunger A 62 is pushed upward the compressed air in the valve piston lower chamber is discharged from the bottom of Plunger A 62 As a result the compressed air the accumulator 222 pushes down Valve Piston B 59 blocking the air supply vent and opening the exhaust valve 2 When the exhaust valve opens the compresse
34. s worn Check that the driver blade tip is not abnormally worn Replace the part Workpiece is too hard Check if a nail is bent even when driven into soft wood 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 Adjuster is incorrectly set Air pressure is too low Turn the adjuster to the lowest position and then drive nails Set the adjuster to the optimum position Adjust air pressure to 4 9 8 3 bar 5 8 5 kgf cm 70 120 psi 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 eed Problem Possible cause x most common cause Inspection methods Remedy 3 Nails cannot be driven into the workpiece completely the heads cannot be made flush continued X e Driver blade is worn Perform idle driving to check the driver blade is projected from the nose tip Replace the part O ring in the piston is abnormal worn or damaged Cylinder inside surface is abnormal worn or rough Disassemble the output section and check the O ring and the inside of the cylinder for abnormality Replace the abnormal part Cylinder plate or O ring is abnormal removed
35. sassembly 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 1 8 63 on Plunger A 62 O Rings 5 4 58 8 8 57 and 11 60 on Valve Piston B 59 and the shaft of Plunger A 62 as shown in Fig 16 As shown in Fig 16 install Valve Bushing 64 so that the roll pin groove in Valve Bushing A 64 will be aligned with the roll pin hole in the Body Ass y 21 First insert a roll pin puller 3 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 18 52 If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing A 64 is not aligned with the roll pin hole in the Body Ass y 21 it will damage the periphery of Valve Bushing A 64 and prevent disassembly or reassembly Body Ass y 21 Apply grease to the stem Coat the O ring groove s shaft with grease 2 9 SS ESS GAA 22222222227 Roll Pin D3 x 18 52 PAS Y Wy 7 Plunger 62 Assemble 1 Roll hole Valve Bushing A 64 Roll pin groove Valve Bushing A 64 Fig 16 e After assembling check that Plunger A 62 moves smoothly 24 10 4 Disassembly R
36. ss y 21 or the Cap 49 is abnormal broken deformed or scratched 18 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 Before 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 Oil required Hitachi pneumatic tool lubricant 1 oz 30 cc Oil feeder Code No 877153 4 oz 120 cc Oil feeder Code 874042 1 quart 1 Itr Can Code No 876212 If Gasket A 9 is damaged replace it and check that no air is leaking Be especially careful to prevent the entry of foreign particles into the control valve section Tightening torque for each part Bolt screw and cap Tightening torque kgfecm ft lbs Nylock Bolt W Flange 35 14 7 0 8 150 8 10 8 0 6 Nylock Hex Socket Hd Bolt M5 88 8 3 0 5 85 5 6 1 0 4 H
37. ssed Air Actuated Fastener Driving Tools Safety Requirements for 8 MECHANISM AND OPERATION PRINCIPLE 8 1 Mechanism As illustrated in Fig 4 NV 45AC can be generally divided into four sections output section control valve section driving section and magazine section Most of the parts of the above sections have been newly designed though its basic construction is the same as that of the Model NV 50AG Primary differences from the Model NV 50AG are described below e Output section enn Most of the parts have been newly designed though its basic construction is the same as that of the Model NV 50AG The piston unit employs O rings at the sliding portion in the same manner as the Model NV 45AB instead of a piston ring The protector has been newly designed to prevent slipping of tool Control valve section This section is common to the Models NR 90AC and NV 65AH e Driving section nn The adjuster has been newly designed to improve operability in nailing depth adjustment The plastic guard shielding the pushing lever and the feed piston has been newly designed to prevent adhesion of dust e Magazine section This section is common to the Model NV 45AB though the shingle guide is not provided The shingle guide is interchangeable between the Model NV 45AB and the Model NV 45AC Output section Driving section 4 Head Valve A 12 Valve Piston B 59 Plunger Spring 61 Valve Bushing B 55 P
38. that nails are correctly loaded in the groove of the nose Load nails in the correct position in the nose Dust sticks to the feeder sliding portion of the nose or lubrication is needed Air pressure is too low Air passage is clogged with broken pieces of piston bumper etc Feeder piston chamber contains foreign matter such as broken pieces of piston bumper etc Open the nail guide and perform idle driving to check the feeder s operation e Remove dust and then lubricate the sliding surface e Adjust the air pressure to 4 9 8 3 bar 5 8 5 kgf cm 70 120 psi e Remove foreign matter e Replace the piston bumper with new one e Body Remove foreign matter in the return air chamber e Nose Remove foreign matter in the air passage and the feed piston chamber Problem Possible cause x most common cause Inspection methods Remedy 1 Nails cannot be driven e Air leaks from the gap between the body and the nose O rings are worn or deformed e O rings need lubrication e 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 Correct or replace the parts e Dust s
39. tickes to the inside of the nail guide groove or lubrication is needed Spring is abnormal missing damaged or fatigued e 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 Remove dust and then lubricate Replace the abnormal parts Magazine section Pushing lever Magazine Check that a nail does not catch on another nail in the magazine e Check that a nail does not catch on some part of the magazine Check the height of the nail holder Collate the nails correctly and reload the nailer with them Remove burrs or deformed part Replace the parts Adjust the height of the nail holder correctly Pushing lever Check the operation of the pushing lever Correct or replace the parts Output section piston driver blade etc Air pressure is too low O ring in the piston is abnormal worn or damaged 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 e Open the nail guide and perform idle driving to check that the driver blade is returned e Adjust the air pressure to 4 9 8 3 bar 5 8 5 70 120 psi Replace the O ring Replace the piston bumper Reassemble or replac
40. uired Hex bar wrench 4 mm Roll pin puller 3 mm 0 118 dia Nail Guide Shaft 29 Guide Lock 81 Nose 36 Spring 85 Spring 82 3 mm 0 118 hole Nail Stopper B 86 O Ring P 4 80 Nail Guide 83 Spring 82 Nail Guide Cover 87 Nylock Hex Socket Hd Bolt M5 x 12 88 Fig 23 Disassembly and reassembly of nail guide nail stoppers A and B etc a Disassembly Remove the Nose 36 by following the procedure in 1 section 10 4 e Put a roll pin puller 8 mm 0 118 dia through the 3 mm 0 118 hole in the Nose 36 and pull out the Nail Guide Shaft 29 Then the Nail Guide 83 and other parts can be removed in an assembly state Holding the Nail Guide Cover 87 with a finger to prevent jumping of the Springs 82 and 85 remove the Nylock Hex Socket Hd Bolt M5 x 12 88 with a hex bar wrench 4 mm Then the Nail Guide Cover 87 and the two Springs 85 can be removed e Pull out the Guide Lock 81 from the Nail Guide 83 Then Nail Stoppers A 84 and B 86 and the Spring 82 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Remove dust from the claw groove of the Nail Guide 83 and then assemble it Securely engage the Spring 85 with the convex portions of Nail Stoppers A 84 and B 86 to assemble e After reassembly push Nail Stoppers A 84 and 86 with a finger and
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