Hitachi NR 65AK Page 31 Service Manual Download

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(b) Reassembly

Disassembly procedures should be followed in the reverse order. Note the following points:

Be extremely careful to prevent the entry of foreign particles into the control valve section.

Thoroughly apply grease to the O-Ring (I.D 1.8) [48] on Plunger (A) [47], O-Rings (I.D 11) [43], (S-18) [41]

and (S-4) [45] on Valve Piston (B) [44], and the shaft of Plunger (A) [47] as shown in Fig. 26.

As shown in Fig. 26, install Valve Bushing (A) [49] so that the roll pin groove in Valve Bushing (A) [49] will be

aligned with the roll pin hole in the Body Ass'y [18]. 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 28 [38].

If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing (A) [49] is not

aligned with the roll pin hole in the Body Ass'y [18], it will damage the periphery of Valve Bushing (A) [49] and

prevent disassembly or reassembly.

After assembling, check that Plunger (A) [47] moves smoothly.

Fig. 26

Plunger (A) [47]

Valve Bushing (A) [49]

Roll pin
groove

Coat the O-ring
groove's shaft
with grease.

Roll Pin D3 x 28 [38]

Body Ass'y [18]

Apply grease to the stem.

Roll pin hole

Summary of Contents for NR 65AK

Page 1: ...STRIP NAILER NR 65AK LIST No 1099 Sep 2001 POWER TOOLS TECHNICAL DATA AND SERVICE MANUAL SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT N MODEL NR 65AK ...

Page 2: ...Notice for use Specifications and parts are subject to change for improvement Refer to Hitachi Power Tool Technical News for further information ...

Page 3: ...D 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 Symbols Utilized Competitors Company Name Model Name PASLODE 5250 65SPP Y SENCO SN60MC R ...

Page 4: ... 3 Operation Principle 14 9 TROUBLESHOOTING GUIDE 16 9 1 Troubleshooting and Correction 16 9 2 Possible Causes and Corrections of Air Leakage 20 10 DISASSEMBLY AND REASSEMBLY 22 10 1 General Precautions in Disassembly and Reassembly 22 10 2 Disassembly and Reassembly of the Output Section 23 10 3 Disassembly and Reassembly of the Control Valve Section 25 10 4 Disassembly and Reassembly of the Driv...

Page 5: ...drive nails at corners thanks to the short center height 4 Easy to adjust nail lengths The new nails specifically designed for the Model NR 65AK are also provided refer to page 3 The Model NR 65AK has already been registered under the trade name of STRAP TITE as a strip nailer specifically designed for the metal hardware 3 APPLICATIONS Metal hardware with pre punched holes to wood stud installatio...

Page 6: ...kage dimensions Length x Height x Width Packaging 476 mm x 383 mm x 132 mm 18 3 4 x 15 x 5 7 32 Eye protector Code No 875769 1 Hex bar wrench for M5 screw Code No 944459 1 Hex bar wrench for M4 screw Code No 944458 1 Hex bar wrench for M3 screw Code No 943277 1 Pneumatic tool lubricant 1 oz oil feeder Code No 877153 Pneumatic tool lubricant 4 oz oil feeder Code No 872042 Pneumatic tool lubricant 1...

Page 7: ...ult in dangerous tool malfunction and or nail malfunction causing serious injury Select adequate nail size to meet proper metal hardware requirement needed for application designed by metal hardware manufacturer and regulated by the applicable building code CAUTION Ensure that nails are as specified in Fig 1 Other nails will cause jamming of nails and subsequent damage to the nailer 280 7 1 mm 1 1...

Page 8: ...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 Fig 2 Required nailing energy and nailer output energy Air pressure setting to drive nail flush with NR 65AK Hemlo...

Page 9: ...si 448 mm x 335 mm x 85 mm 17 5 8 x 13 3 16 x 3 3 8 Model name NR 65AK 1 8 ltr cycle 0 63 ft3 cycle 44 nails 2 strips Rear loading Aluminum Nail capacity Nail point 2 9 kg 6 4 lbs Adjust the nail gate Located at the handle for good balance Fig 3 38 mm 1 1 2 465 mm x 346 mm x 114 mm 18 5 16 x 13 5 8 x 4 1 2 365 mm x 330 mm x 111 mm 14 1 2 x 13 x 4 3 8 5 4 8 3 bar 5 5 8 5 kgf cm2 80 120 psi 5 4 8 3 ...

Page 10: ...nst 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 wit...

Page 11: ... 8 1 Mechanism As illustrated in Fig 6 NR 65AK 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 except the control valve section have been newly designed for maximum performance in a strip nailer Features of the main parts are described below Output section Most of the parts have been newly...

Page 12: ...or contact trip operation bounce fire and not available for contact trip valve units And this tool has a new pushing lever safety mechanism this is a different push lever mechanism from another nailers The position of the pushing lever when the nail feeder is pulled back is shown as below When nails are loaded and the trigger is depressed the pushing lever comes down and when the pushing lever tou...

Page 13: ...nt Cylinder 15 Piston Bumper 19 Nose 20 Guard 23 Pushing Lever A 30 Control valve section Plunger Spring B 46 Plunger A 47 Valve Bushing A 49 Valve Bushing B 40 Valve Piston B 44 Feeder Plate 81 Nail Feeder 83 Magazine Cover 71 Magazine section Body Ass y 18 Nail Gate 72 Driving section Pushing Lever B 28 Magazine 74 O Ring 16 Cap 35 ...

Page 14: ...ole in the metal connector Fig 7 Nail point Pushing Lever A 30 Magazine 74 Trigger 52 Nail point The hole Workpiece Metal connector Plunger A 47 Trigger Arm 50 b After inserting the nail point into the hole in the metal connector pull the Trigger 52 to make the tip of Pushing Lever A 30 contact with the surface of the metal connector Then the Trigger Arm 50 pushes up Plunger A 47 and the nailer is...

Page 15: ...on going far from Pushing Lever A 30 through the guide groove of the Nose 20 Thus Pushing Lever B 28 comes off the groove of Pushing Lever A 30 Fig 9 Pushing Lever C 24 Nose 20 Pushing Lever B 28 Pushing Lever B 28 Pushing Lever A 30 Pushing Lever C 24 Groove of Pushing Lever A 30 Pushing Lever B 28 d Push up the tip of Pushing Lever A 30 Then only Pushing Lever A 30 moves while Pushing Levers B a...

Page 16: ... Thus the nailer does not start even if the Trigger 52 is pulled or the pushing lever is pushed up 3 Nail gate mechanism a When nails are loaded in the Magazine 74 the end of the Shaft 59 is inserted into the groove of the Nail Gate 72 and the Nail Gate 72 cannot move Therefore only the nails whose lengths match the position of the Nail Gate 72 can be loaded in the Magazine 74 Fig 12 Trigger 52 Na...

Page 17: ...2 Thus the Nail Gate 72 can be moved Fig 13 Nails of different length can be loaded by moving the Nail Gate 72 The following label that lists precautions in the use of the Nail Gate 72 is provided on the Magazine 74 Ensure that the customers fully understand and follow these precautions before using the tool Groove of nail gate Nail Gate 72 can be moved End of Shaft 59 Nose 20 Nail Feeder 83 Shaft...

Page 18: ...is discharged from the bottom of Plunger A 47 As a result the compressed air in the accumulator pushes down Valve Piston B 44 blocking the air supply vent and opening the exhaust valve 2 When the exhaust valve opens the compressed 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 10 overcome...

Page 19: ...ead valve chamber to push down Head Valve A 10 As a result Head Valve A 10 and Cylinder 15 are sealed and at the same time Head Valve A 10 and Exhaust Cover 5 are released to open the exhaust vent 4 The compressed air at the upper portion of Piston H 17 is discharged into the atmosphere through the exhaust vent In this way the air pressure at the upper portion of Piston H 17 is reduced and the gre...

Page 20: ...Magazine is abnormal deformed or damaged Nail feeder is abnormal deformed or damaged Ribbon spring is abnormal deformed or damaged Guide plate is abnormal deformed burrs damaged or fatigued Nail rail is abnormal deformed burrs damaged or fatigued Adhesive fragments are on the guide plate and the nail rail or they need oil Check if the magazine is normally loaded with specified nails Check if the n...

Page 21: ...Nails cannot be driven continued See item 1 Check that the driver blade tip is not abnormally worn Check if a nail is bent even when driven into soft wood Check if a nail is bent even when driven into soft wood Perform idle driving to check the driver blade is projected from the nose tip Disassemble the output section and check the O ring and the inside of the cylinder for abnomality Disassemble t...

Page 22: ...amaged Control valve section Plunger A valve piston B valve bushing A or valve bushing B is abnormal seized or damaged Pull the nail feeder backward and perform idle drivng to check that the driver blade is returned Problem Possible cause Most common cause Inspection method Remedy 3 Nails cannot be driven into the workpiece completely the heads cannot be made flush continued 4 Nails jam Nails Unsp...

Page 23: ... blade etc Air pressure is too high 4 Nails jam continued Perform idle or actual driving to check if the driver blade is returned completely Nails may be jammed if driven at a high pressure and high speed Check pressure and driving speed See item 1 Output section piston driver blade etc Adjust the air pressure to 4 9 8 3 bar 5 8 5 kgf cm2 70 120 psi ...

Page 24: ...ir 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 B e f g d c b h E D C F a A Exhaust port Head Valve A 10 and Cylinder 15 are abnormal seal surface of the b portion is worn or deformed The O ring 9 is abnormal worn deformed or damaged Hea...

Page 25: ... Ring 13 of the Body Ass y 18 is abnormal broken or damaged The Nylock High Tension Bolt M6 x 20 21 is loose The seal surface of the Body Ass y 18 or the Nose 20 is abnormal broken deformed or scratched The Piston Bumper 19 is abnormal e or f portion is damaged deformed or cracked Piston H 17 is abnormal driver blade or sealed face is deformed The f surface of the Body Ass y 18 is deformed The upp...

Page 26: ...bly and Reassembly 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 No 874042 1 quart 1 ltr Can Code No 876212 If Gasket B 6 is damaged replace it and check that n...

Page 27: ...points Apply grease to the inside of the O ring I D 37 16 O ring S 70 11 O ring S 46 13 and the Cylinder 15 before reassembly Mount the Gasket B 6 aligning the 6 mm 0 236 dia hole with the blowhole of the Body Ass y 18 10 2 Disassembly and Reassembly of the Output Section See Fig 18 Hex Socket Hd Bolt M6 x 12 1 Plate 2 Head Bumper 7 Gasket B 6 Exhaust Cover 5 Top Cover 3 Hex Socket Hd Bolt M5 x 35...

Page 28: ... the lip portions and of Head Valve A 10 Fig 21 Apply grease to the O Ring P 22 9 Mount the O Ring P 22 9 to Head Valve A 10 then mount it to the Exhaust Cover 5 C A B Mount the Cylinder Plate 12 to the Cylinder 15 facing the stopper of the Cylinder Plate 12 to the Piston Bumper 19 When mounting to the Body Ass y 18 fit the rib of the Body Ass y 18 into the stopper groove of the Cylinder Plate 12 ...

Page 29: ...ally designed for the Model NR 65AK it is not common to the other nailers Do not use another plunger spring for the Model NR 65AK Plunger Spring B 46 is colored silver for identification a Disassembly Pull out the Roll Pin D3 x 28 38 with the roll pin puller 3 mm 0 118 dia remove the Pushing Lever Guide 54 and the Trigger 52 can be removed To remove the Pushing Lever Guide 54 together with the dri...

Page 30: ...ing A 49 and the Head Valve O Ring I D 16 8 39 CAUTIONS Be careful not to damage Valve Piston B 44 Valve Bushings A 49 and B 40 etc Do not pull out the end of Plunger A 47 with pliers 3 To take out Valve Bushing B 40 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 40...

Page 31: ... roll pin hole in the Body Ass y 18 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 28 38 If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing A 49 is not aligned with the roll pin hole in the Body Ass y 18 it will damage the periphery of Valve Bu...

Page 32: ...gh Tension Bolt M6 x 20 21 Roll Pin D3 x 12 22 Pushing Lever C 24 Guard 23 Nylock Bolt W Flange M6 x 16 31 Body Ass y 18 Pushing Lever Spring 25 Pushing Lever B 28 Hex Socket Hd Bolt M6 x 12 77 Tools required Hex bar wrench 5 mm Hex bar wrench 4 mm Roll pin puller 3 mm 0 118 Phillips screwdriver O Ring 1AP 3 26A Pin A 27 O Ring P 4 91 Pushing Lever A 30 O Ring S 46 13 Nylock Hex Socket Hd Bolt M4 ...

Page 33: ...g Lever C 24 and insert Pin A 27 Fig 29 a Disassembly Remove the Hex Socket Hd Bolt M6 x 12 77 and Nylock Bolt W Flange M6 x 16 31 and take out the magazine section and the Guard 23 Remove the Nylock High Tension Bolt M6 x 20 21 and take out the Nose 20 Pull out the Roll Pins D3 x 12 22 and Pin 55A Remove Pin A 27 with a phillips screwdriver then Pushing Lever A 30 Pushing Lever B 28 and Pushing L...

Page 34: ...ecure them with the Hex Socket Hd Bolt M6 x 12 77 Fig 31 Insert the Sleeve 64 into the hole of the Guard 23 and put Washer B 63 on the Sleeve 64 then secure them with the Nylock Hex Socket Hd Bolt M4 x 12 62 Fig 31 After reassembly check that Pushing Lever A 30 Pushing Lever B 28 and Pushing Lever C 24 move smoothly as shown in page 9 and also check that the nail feeder ass y moves smoothly Fig 29...

Page 35: ...bly of the cap Hex Socket Hd Bolt M5 x 16 36 a Disassembly Remove the three Hex Socket Hd Bolts M5 x 16 36 with the hex bar wrench so that the Cap 35 and Gasket B 34 can be removed b Reassembly Disassembly procedures should be followed in the reverse order 2 Disassembly and reassembly of the nail feeder See Fig 33 Tool required Roll pin puller 3 mm 0 118 dia Roll Pin D3 x 10 79 Pin 82 Nail Feeder ...

Page 36: ...h a roll pin puller 3 mm 0 118 dia The Pushing Lever Stopper 80 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points After mounting the Feeder Plate 81 to the Nail Feeder 83 mount the Feeder Spring 84 aligning with the protruded portion Then insert the Pin 82 Fig 34 Insert the Pushing Lever Stopper 80 into the Nail Feeder 83 and press...

Page 37: ...M4 x 6 78 Hex Socket Hd Bolt M6 x 12 77 Flange Nut M5 89 Washer 61 3 Disassembly and reassembly of the magazine section See Fig 35 Tool required Hex bar wrench 3 mm 4 mm a Disassembly Loosen the Hex Socket Hd Bolt W Flange M4 x 6 78 and remove the Handle Arm 66 and the Nail Stopper 86 Loosen the Machine Screw W Washer M5 x 16 Black 70 and the Machine Screw W Washers M5 x 25 Black 73A remove the Ma...

Page 38: ...larger winding diameter side of the Spring 60 to the Washer 61 Fig 37 Fig 38 Ribbon Spring 85 Magazine 74 Pin Window of the Magazine 74 End of the Shaft 59 Washer 61 End surface of the Magazine 74 Insert the Shaft 59 into the Magazine 74 until the end of the Shaft 59 is shown underneath the Ribbon Spring 85 Mount the Washer 61 at the other end of the Shaft 59 to the end surface of the Magazine 74 ...

Page 39: ... them with seven Hex Socket Hd Bolts W Flange M4 x 6 78 Fig 39 Mount the Hex Socket Hd Bolts W Flange M4 x 6 78 as shown in Fig 40 Do not mount the Hex Socket Hd Bolt W Flange M4 x 6 78 To mount the Magazine Cover 71 to the Magazine 74 mount the Nail Gate 72 to the Magazine Cover 71 and insert the Shaft 59 into the hole of the Magazine Cover 71 then secure them with the Machine Screw M5 x 20 73 an...

Page 40: ...ving nails with an air pressure of 4 5 kgf cm2 63 psi check that there is no misfiring and bending of nails Recheck the tightening torque of each screw Check that Pushing Lever A 30 slides smoothly Check that the machine will not operate only by pulling the Trigger 52 Also check that the machine will not operate only by depressing Pushing Lever A 30 ...

Page 41: ...Lever A O ring S 4 12 STANDARD REPAIR TIME UNIT SCHEDULES MODEL 10 20 30 40 Fixed Variable NR 65AK Work Flow Top Cover Exhaust Cover Packing B Head Bumper Head Valve Spring O ring P 22 Head Valve A 60 min 50 Cylinder Plate Cylinder Piston Bumper O ring x 4 General Assembly Adjustment Cylinder Body and Valve Tail Cover Magazine Ass y Ribbon Spring Pushing Lever Stopper Feeder Plate Nail Feeder Feed...

Page 42: ...0 11 12 13 14 15 16 17 18 13 19 20 21 22 23 24 25 27 28 29A 26A 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 38 38 51 52 53 54 55A 57 58 59 60 61 62 63 64 65 66 67 65 68 69 70 72 74 75 76 77 78 79 80 81 82 84 85 87 501 502 503 504 65 73A 77 83 86 77 71 89 91 90 57 61 65 77 87 74 89 ...

Page 43: ...IGH TENSION BOLT M6X20 4 22 949 535 ROLL PIN D3X12 10 PCS 1 23 883 447 GUARD 1 24 883 445 PUSHING LEVER C 1 25 883 446 PUSHING LEVER SPRING 1 26A 873 093 O RING 1AP 3 1 27 883 448 PIN A 1 28 883 444 PUSHING LEVER B 1 29A 883 470 SPRING 1 30 883 443 PUSHING LEVER A 1 31 880 474 NYLOCK BOLT W FLANGE M6X16 1 32 881 768 GRIP TAPE A 1 33 880 407 TAPE 2 34 881 769 GASKET B 1 35 881 949 CAP 1 36 949 821 ...

Page 44: ...BEL 1 69 LABEL 1 70 881 772 MACHINE SCREW W WASHERS M5X16 BLACK 1 71 883 461 MAGAZINE COVER 1 72 883 462 NAIL GATE 1 73A 880 734 MACHINE SCREW W WASHERS M5X25 BLACK 1 74 883 457 MAGAZINE 1 75 883 434 MAGAZINE RING 1 76 883 435 MAGAZINE PLATE 1 77 878 647 HEX SOCKET HD BOLT M6X12 4 78 305 735 HEX SOCKET HD BOLT W FLANGE M4X 6 7 79 949 776 ROLL PIN D3X10 10 PCS 2 80 883 439 PUSHING LEVER STOPPER 1 8...

Page 45: ...ODE NO DESCRIPTION REMARKS NO USED ITEM NO CODE NO DESCRIPTION REMARKS NO USED NR 65AK Printed in Japan 010914N 9 01 501 875 769 EYE PROTECTOR 1 502 943 277 HEX BAR WRENCH 3MM 1 503 944 458 HEX BAR WRENCH 4MM 1 504 944 459 HEX BAR WRENCH 5MM 1 601 883 469 MAGAZINE S ASS Y 1 ...

Page 46: ...MEMO ...

Page 47: ......

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Hitachi NR 65AK, Service Manual

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