finish nailer nt 65ma
Contents
1. NT 65MA HITACHI POWER TOOLS TECHNICAL DATA FINISH NAILER AND NT 65MA SERVICE MANUAL LIST No 1093 Dec 1999 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 SENCO SFN40 BOSTITCH N60FN Notice for use Specifications and parts are subject to change for improvement Refer to Hitachi Power Tool Technical News for further information CONTENTS Business Section Page 1 PRODUCT NAME m Hn nese nnne 1 2 MARKETING OBJECTIVE PW A Ek 1 3 APPLICATIONS qaqay 1 4 SELLING POINTS QU pupaq A 1 5 SPECIFICATIONS OUTA 2 5 1 Specifications SO Tote een ER TEE LA Da OO EE 2 5 2 Nail Selection ne hens A W ka2. e Bumper sheet abnormal square hole worn damaged e Cylinder s internal surface abnormal deposits of dirt worn e Check if the magazine is normally loaded with specified genuine nails e Check the nail feeding section for abnormal conditions burrs fatigued deformed damaged e Check if they move smoothly after loading nails and check if the nail feeder operates smoothly e Keep the nail feeder in the back position after pulling it backward and release the lock lever for idle driving Then check if the driver blade and guide plate A have returned e Check if nails can be driven at 5 kgf cm 4 9 bar 70 psi e Use specified genuine nails e Remove the abnormal nails and load the magazine with normal nails Correct the burred or deformed portion e Replace the defective part e Replace the defective part e Replace the defective pari e Replace the defective part Nail rail i e Replace the defective part e After removing the adhesive fragments and wood chips apply oil to the nail rail e Adjust for 5 to 8 5 kgf cm 4 9 8 3 bar 70 120 psi e Replace the piston ring e Replace the piston bumper e Reassemble or replace e Touch up or replace e Replace the part e After removing the dirt apply oil or replace Possible cause most common cause Inspection methods 1 Nails cannot e Head valve sliding surface abnormal e While idle driving check if t
3. 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 1962 302 Power operated hand tools ANSI SNT 101 1993 Portable Compressed Air Actuated Fastener Driving Tools Safety Requirements for 8 MECHANISM AND OPERATION PRINCIPLE 8 1 Mechanism Most of the parts of the output section have been newly designed for the addition of the blow nozzle function though its basic construction is the same as that of the Model NT 65AA Primary differences from the Model NT 65AA are described below e Output section o The exhaust cover nose valve bushing plunger valve packing knob and spring have been newly designed for the blow nozzle function The top cover and plate are common to the Models NR 90AC and NV 65AH Output section Drivi
4. B 76 and 78 29 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY e Check that the Plunger 70 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 the Adjuster 44 to the deepest position e Recheck the tightening torque of each screw e Check that Pushing Lever A 46 slides smoothly e Check that the machine will not operate only by actuating Trigger A 57 Also check that the machine will not operate only by pressing Pushing Lever A 46 30 12 STANDARD REPAIR TIME UNIT SCHEDULES MODEL Fixed Variable 10 20 30 40 50 60 General Assembly Work Flow Top Cover Exhaust Cover Gasket Exhaust Valve Rubber Head Valve Spring O Ring Head Valve Cylinder O Ring C Head Valve Rubber A Pushing Lever B Holder Spring Adjuster Pushing Lever A Piston Piston Ring O Ring Pushing Lever Guide Trigger A Trigger Pin Valve Bushing A Valve Bushing B O Ring x 7 Plunger Plunger Spring Valve Piston Adjustment Body and Cylinder Valve Guide Plate A Guide Plate B Blade Guide Magazine Magazine Cover Nail Feeder Nail Feeder Nail Rail Cylinder Cylinder O R
5. Disassembly and Reassembly of the Driving Section See Fig 20 Nylon Nut M5 MN Sleeve 49 Body Ass y 34 Blade Guide 43 Guide Plate B 351 I Hex Socket Hd JE Bolt M6 x 30 36 Guide Plate 28 37 Lock Lever 38 Guide 59 39 Roll Pin D3 x 20 40 Adjuster 44 Ratchet Spring 45 Pen Pushing Lever A 46 Fig 20 Disassembly and reassembly of the driving section Pushing Lever Roll Pin D4 x 14 Holder Spring 41 Pushing Lever B 42 Hex Socket Hd Bolt W Flange 5 x 20 80 Roll Pin x 28 56 Tools required e Hex bar wrenches 4 mm and 5 mm e Roll pin pullers 3 mm dia and 4 mm dia e Flat blade screwdriver with small tip a Disassembly e Continuously turn the Adjuster 44 in the direction in which the nail is raised when adjusting the driving depth refer to ADJUSTING THE NAILING DEPTH on page 18 the Instruction Manual so that Pushing Lever A 46 can be removed e Remove the Hex Socket Hd Bolt W Flange M5 x 20 80 with the hex bar wrench 4 mm and remove the two Hex Socket Hd Bolts M6 x 30 36 with the hex bar wrench 5 mm Now the Blade Guide 43 Guide Plates A and B 37 and 35 Pushing Lever B 42 etc can be removed e Remove the two Ratchet Springs 45 from the Adjuster 44 with the small flat blade screwdriver having while being very careful
6. M5 x 16 54 is loose e The seal surface of the Body Ass y 34 or Cap A 53 is abnormal damaged deformed flawed 19 2 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 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 ring and O ring sliding portion When installing the O ring be careful not to damage the O ring 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 Itr Can Code No 876212 e f the Gasket 7 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 Tightening torque N m kgf cm ft lb Hex Socket Hd Bolt M6 1 36 12 7 0 8 130 8 9 4 0 6 Hex Socket Hd Bolt M5 4 54 8 3 0 5 85 5 6 1 0 4 Hex Socket Hd Bolt W Flange M5 8 3 0 5 85 5 6 1 0 4 M
7. and reassembly of the Cylinder 15 Piston 29 Piston Bumper 30 etc See Fig 14 Piston Ring 27 0 iN O Ring 1 0 34 2 28 _ Piston 29 Retaining Ring 14 CO Cylinder 15 Cylinder O Ring Retaining ring detaching groove When assembling push in the Cylinder 15 until the Retaining Ring 14 is surely seated in the groove in the Body Ass y 34 Body Ass y 34 Fig 14 Disassembly and reassembly of the cylinder piston piston bumper etc Zoe Tools required e Hex bar wrench 4 mm e Flat blade screwdriver a Disassembly e Remove the Exhaust Cover 5 as described in section 1 remove the Retaining Ring 14 of the Body Ass y 34 insert the blade of the screwdriver into the retaining ring detaching groove in the Body Ass y 34 and remove the Retaining Ring 14 Now the Cylinder 15 Piston 29 Piston Bumper 30 with the Bumper Sheet 31 assembled etc can be taken out b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e Apply the supplied oil Hitachi pneumatic tool lubricant to the Piston Ring 27 O Ring 1 0 34 2 28 and the internal side of the Cylinder 15 e Apply grease to the Cylinder O Ring 1 0 63 1 16 and then install e Push in the Cylinder 15 until the Retaining Ring 14 is correctly seated in the groove in the Body Ass y 34 e Remember that when
8. bar E t 4 5 6 7 8 85 kgf cm x 60 70 80 90 100 110 120 psi s s FA Nail d x L A TI SETE Air pressure setting to drive nail flush with NT 65MA c 5 5 Se mm x mm N QN N N 0 K E 0 5 5 5 5 8 0 E E EE L E E E E MN OO wu C en cO st iO x x x gt lt x E E E BE E E E E E E c cO c Fig 3 Required nailing energy and nailer output energy As 6 COMPARISONS WITH SIMILAR PRODUCTS Maker HITACHI T NT 65MA NT 65AA I 5 8 5 kgf cm 5 8 5 kgf cm 5 7 kgf cm Operating pressure ai 70 120 psi 70 120 psi 70 100 psi Weight 2 0 kg 4 4 lbs 1 9kg 4 2 lbs 2 17 kg 4 7 Ibs 1 95 kg 4 4 Ibs 344 mm x 305 mm x 82 mm 330 mm x 286 mm x 89 mm 359 mm x 276 mm x 76 mm Dimensions L x H x W 13 17 32 x 12 x 3 7 32 13 x 11 1 4 x 3 1 2 14 1 8 x 10 7 8 x 3 Air consumption 1 20 Itr cycle 1 25 Itr cycle 1 31 Itr cycle at 7 kgf cm 100 psi 0 042 ft cycle 0 044 ft cycle 0 046 ft cycle Nail capacity 100 pcs 100 pcs 100 pcs Magazine type Rear loading type Rear loading type Rear loading type Angle 34 Angle 34 Angle 26 Blow nozzle Provided None None None Direction change of Easily changeable 360 Only 4 directions Changeable 360
9. by 90 each by but requires a hex exhaust air by turning by hand replacing the piece bar wrench Clogged nail release Single touch operation Single touch Prying out with a method by hand operation by hand flat blade screwdriver Driving adjustment With an easy to adjust scale No scale No scale mechanism Adjusting scale Racket grip Hook and looptape Rubber SANES DAP Easy to grip type Slippery Unpleasant touch Collating 34 34 26 angle Applicable 2 4 mm 3 0 mm 15 2 4 mm 3 0 mm 15 2 4 mm 3 0 mm 15 nails j 095 12 095 12 095 12 Lenath 32 mm 65 mm 32 mm 65 mm 32 mm 65 mm 9 1 1 4 2 1 2 1 1 4 2 1 2 1 1 4 2 1 2 7 PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NT 65 MA 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 The standard Model NT65MA is intended for continuous nail driving Note that the Model NT65MA is single shot type in some areas Salespersons must advise the customers that the sequential trip mechanism kit which can change the Model NT 65MA into a single
10. not to lose them Now the Adjuster 44 can be removed from Pushing Lever B 42 e Pull out the Roll Pin D4 x 14 39 with the roll pin puller 4 mm dia so that Guide Plate A 37 and Guide Plate B 35 can be disassembled e Pull out the Roll Pin D3 x 20 40 and the two Roll Pins D3 x 28 56 with the roll pin puller 3 mm dia so that the Lock Lever 38 and Pushing Lever Guide 59 can be removed b Reassembly e Disassembly procedures should be followed in the reverse order and tighten the two Hex Socket Hd Bolts M6 x 30 36 after making the Blade Guide 43 Guide Plate A and B 37 and 35 flush with the Body Ass y 34 After assembly check that Pushing Levers A and 46 and 42 and the Adjuster 44 move smoothly 10 5 Disassembly and Reassembly of the Cap and the Magazine Section 1 Disassembly and reassembly of the cap See Fig 21 Tool required e Hex bar wrench 4 mm Cap A 53 Hex Socket Hd Bolt M5 x 16 54 Gasket B 52 Al Body Ass y 34 Fig 21 Disassembly and reassembly of the cap a Disassembly e Remove the three Hex Socket Hd Bolts M5 x 16 54 with the hex bar wrench 4 mm so that Cap A 53 and Gasket B 52 can be removed b Reassembly e Disassembly procedures should be followed in the reverse order 28 2 Disassembly and Reassembly of the Magazine Section See Fig 22 Magazine Cover 72 Nylon Nut 5 48 Machine Scre
11. shot type is available as an option and change the Model NT 65MA when there is a customer s need Refer to the leaflet attached to the Instruction Manual 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 Each Model NT 65MA 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 A DANGER READ INSTRUCTION MANUAL before use Failure to follow instructions WILL RESULT IN SERIOUS INJURY Operator and others in work area MUST WEAR ANSI REQUIRED gt PROTECTOR e NEVER USE BOTTLED GASES Use regulated air only e DO NOT EXCEED 120 psi 8 3 bar au e NEVER CARRY WITH FINGER ON TRIGGER e DISCONNECT AIR before servicing unjamming or when not in use
12. site and mobile home construction e Mounting of light and heavy trim e Installation of molding paneling and stairways e Assembling of window and door casings e For cabinet making furniture making and woodworking POUS Capable of cleaning chips and sawdust of course it drives nails thanks to the blow nozzle Lightweight and powerful Equipped with a racket grip For comfort Exhaust direction easily changeable Simple drive depth adjusting mechanism Easy to use clogged nail release mechanism 5 SPECIFICATIONS 5 1 Specifications Model NT 65MA Driving system Reciprocating piston type Operating pressure 5 8 5 kgf cm 70 120 psi 4 9 8 3 bar Gauge pressure Driving speed 3 pcs sec Weight 2 0 kg 4 4 lbs Dimensions Length x Height x Width 344 mm x 305 mm x 82 mm 13 17 32 x 12 x 3 7 32 Nail feed system Ribbon spring Nail capacity 100 nails Air consumption 1 20 Itr cycle at 7 kgf cm 0 042 ft cycle at 100 psi 1 20 Itr cycle at 6 9 bar Air inlet 3 8 NPT thread Packaging Corrugated cardboard box Sleeve type Package dimensions Length x Height x Width 430 mm x 380 mm x 113 mm 16 15 16 x 14 15 32 x 4 7 16 Standard accessories Eye protector Code No 875769 ER
13. 62 as shown in Fig 18 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 1 0 1 8 69 of the Plunger 70 O Rings 64 and 67 5 4 I D 8 8 and I D 11 of the Valve Piston 66 and the shaft of the Plunger 70 shown in Fig 19 e As shown in Fig 19 install Valve Bushing A 71 so that the roll pin groove in Valve Bushing A 71 will be aligned with the roll pin hole in the Body Ass y 34 First insert the roll pin puller 3 mm dia into the roll pin hole Then upon confirming that the puller passes through the hole drive in the Roll Pin D3 x 28 56 If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing A 71 is not aligned with the roll pin hole in the Body Ass y 34 it will damage the periphery of Valve Bushing A 71 and prevent disassembly or reassembly Body Ass y 34 OZR DEYO ONE li 2 EI NOMA SHO NS 4 iy ONI RSS N N N a N 1 7 SS ZL 0 SS Posse Roll Pin D3 x 28 56 Roll pin hole Assemble Valve Bushing A 71 Valve Bushing A 71 Plunger 70 Roll pin groove Fig 19 e After assembling check that the Plunger 70 moves smoothly 26 10 4
14. 749 PUSHING LEVER B 881 742 BLADE GUIDE 881 748 ADJUSTER 881 765 RATCHET SPRING 881 750 PUSHING LEVER A 881 751 NOSE CAP A 877 371 NYLON NUT M5 881 774 SLEEVE 881 768 GRIP TAPE A 880 407 4 99 ALTERNATIVE PARTS INCLUD 50 51 G N N a PARTS NT 65MA CODE NO DESCRIPTION REMARKS 881 769 GASKET B 881 758 CAP A 949 821 HEX SOCKET HD BOLT M5X16 10 PCS 872 035 DUST CAP 949 865 ROLL PIN D3X28 10 PCS 880 674 TRIGGER A 881 779 TRIGGER A 881 771 TRIGGER PIN 880 361 PUSHING LEVER GUIDE NAME PLATE 877 699 HEAD VALVE O RING I D 16 8 881 777 VALVE BUSHING B 878 885 O RING S 18 878 925 O RING I D 8 8 981 317 O RING S 4 878 922 VALVE PISTON 880 672 VALVE PISTON B 878 887 O RING 1 0 11 878 884 PLUNGER SPRING 878 888 O RING I D 1 8 878 888 O RING I D 1 8 881 770 PLUNGER 881 778 PLUNGER B 880 671 VALVE BUSHING A 881 752 MAGAZINE COVER 881 755 RIBBON SPRING 881 745 FEEDER
15. AN eee ERI MURS MERE ME 3 5 3 Examples of Nail Use LEETE SS FE W BWE A FRE OE bb SUES CRM E PER EE 3 5 4 Nail Driving Force ek 4 6 COMPARISONS WITH SIMILAR PRODUCTS EBT LES LIY 5 T PRECAUTIONS IN SALES PROMOTION n M errr ee 6 TA A Instruction Manual n 6 Tm Warning Label nnnm 6 7 3 Related Laws and Regulations PEE e e Yi e e EIE 7 8 MECHANISM AND OPERATION PRINCIPLE EE ee rn ee es err ree 8 8 1 I Mechanism 201311010111010 8 8 2 Valve Bushing B and Plunger RE 1 akapa kn ENP aypa 1 yataka asus 10 8 3 Interchangeability of Parts BABEGRLARR EARN as LE EEG LEPOREM MEER eR ARMIN e e RA 10 8 4 Operation Principle ios A T E 269 anes SE maaan Mac ame eS e RSS 11 Service Section 9 TROUBLESHOOTING GUIDE 13 9 1 Troubleshooting and Correction e D 13 9 2
16. ATIVE PARTS 990430 N Mon
17. BO ata a Gale CET ETE 1 Hex bar wrench for M5 screw Code No 944458 E 1 Hex bar wrench for M6 screw Code No 944459 ENE 1 Case Code No 881775 epe dede JOU pee deni er IRE KE REKOU 1 Nose cap A Code No 881751 ya ee ERE v ru dtes aio bate pee 1 Optional accessories Code No 880414 Code No 877153 Code No 872042 Code No 876212 Sequential trip mechanism kit Single shot Pneumatic tool lubricant 1 oz oil feeder Pneumatic tool lubricant 4 oz oil feeder Pneumatic tool lubricant 1 quart can A AA A KS SE DV NH 5 2 Nail Selection The Model NT 65MA utilizes small head T shaped nails finish nails collated by tapes Applicable nails are shown below CAUTION Ensure that nails are as specified in Fig 1 Other nails will cause clogging of nails and subsequent damage to the nailer 15 gauge finish nail collating angle 34 Min Max 0 095 2 4 mm NE 0 095 2 4 mm NE og ge e E E D L 2 0 072 1 8 2 0 072 1 8 mm ORG asasen sese SAA LIQNGGLALQQ 7 FE Fig 1 Dimensions of nails 5 3 Examples of Nail Use A Crown molding B Base mol
18. PLATE 881 767 ROLL PIN D2 5X20 STAINLESS 881 746 NAIL FEEDER 880 321 PUSHING SPRING 881 744 NAIL FEEDER B 881 753 NAIL RAIL 881 773 HEX SOCKET HD BOLT W FLANGE M5X20 881 772 MACHINE SCREW W WASHER M5X16 BLACK 881 766 STOPPER 881 754 MAGAZINE FOR USA FOR AUS FOR AUS FOR USA FOR AUS FOR USA FOR AUS FOR USA FOR AUS lt x s fa ALTERNATIVE PARTS 4 99 STANDARD ACCESSORIES NT 65MA CODE NO DESCRIPTION REMARKS 944 459 HEX BAR WRENCH 5MM 944 458 HEX BAR WRENCH 4MM 875 769 EYE PROTECTOR 881 775 OPTIONAL ACCESSORIES CODE NO DESCRIPTION REMARKS 880 414 SEQUENTIAL TRIP MECHNISM KIT 881 779 TRIGGER A 881 771 TRIGGER PIN 881 778 PLUNGER B 878 888 O RING I D 1 8 880 671 VALVE BUSHING A 880 672 VALVE PISTON B 981 317 O RING S 4 INCLUD 602 608 FOR USA FOR USA FOR USA FOR USA FOR USA FOR USA FOR USA FOR USA Printed Japan 4 99 ALTERN
19. Regrinding the Driver Blade TEASE EET AD DES PE 17 9 3 Possible Cause and Correction of Air Leakage RARA W EE RW Oana 18 10 DISASSEMBLY AND REASSEMBLY 6 O 4 TE REA ER NR P RE 20 10 1 General Precautions in Disassembly and Reassembly dE ERAS EMEN ER AM 20 10 2 Disassembly and Reassembly of the Output Section SE 21 10 3 Disassembly and Reassembly of the Control Valve Section nnn 24 10 4 Disassembly and Reassembly of the Driving Section eee ee eer re eee ee ee ree ee 27 10 5 Disassembly and Reassembly of the Cap and the Magazine Section enne 28 11 INSPECTION AND CONFIRMATION AFTER REASSEMBLY e ee ree rr An 30 12 STANDARD REPAIR TIME UNIT SCHEDULES ee 31 Appendix Assembly Diagram for NT 65MA ok ke 32 1 PRODUCT NAME Hitachi Finish Nailer Model NT 65MA 2 MARKETING OBJECTIVE The Model NT 65MA finish nailer angle type 15 Ga x 65 mm 2 1 2 is an upgraded version of the current Model NT 65AA equipped with a blow nozzle for cleaning chips while nail driving The Model NT 65MA is the lightest 2 0 kg 4 4 lbs and most powerful finish nailer in this class We are confident that your sales will increase with the new Model NT 65MA 3 APPLICATIONS e For manufactured housing on
20. achine Screw W Washer M5 2 0 10 5 20 5 1 5 0 4 20 10 2 Disassembly and Reassembly of the Output Section 1 Disassembly and reassembly of the Exhaust Cover 5 Head Valve 11 Exhaust Valve Rubber A 8 Valve Bushing 25 etc See Figs 10 11 12 and 13 Valve Packing 19 Hex Socket Hd Bolt M6 x 16 1 Knob 26 Nivo Bushing 25 Plate 2 AL ____ E O Ring S 10 24 Top Cover 3 Ma O Ring S3 23 20 O Ring 1AP 3 22 a P d Plunger 21 Spring 20 Hex Socket Hd Bolt M5 x 20 4 Nose 6 G Tools required e Hex bar wrenches 5 mm and 4 mm Gasket 7 lt amp e Socket wrenches 14 mm and 10 mm e Hammer Exhaust Valve Rubber A 8 a Disassembly Head Valve Spring 9 e Remove the four Hex Socket Hd Bolts M5 x 20 4 with a hex bar wrench 4 mm O Ring S 34 10 9 A Oo The entire Exhaust Cover 5 can now be removed from Head Valve 11 3 the Body Ass y 34 Cylinder O Ring C e Remove the Socket Hd Bolt 6 x 16 1 with a hex 0 44 7 NO bar wrench 5 mm The Plate 2 and the Top Cover 3 Eb 13 can now be removed e Remove the Nose 6 with a socket wrench 10 mm and the Valve Bushing 25 with a socket wrench 14 mm The Valve Packing 19 and the Spring 20 can now be removed Bady Ass y 34 e As shown in Fig 11 insert a 4 to 5 mm dia bar into the 5 5 mm dia hole in the Exha
21. amber As a result the Head Valve Spring 9 is SN Oylinder hole 1 pushed down together to seal the Head Valve 11 and Cylinder 15 Return air a 15 Trigger A 57 chamber P 2 When nailing Fig 5 Fig 6 1 When Pushing Lever A 46 and Trigger A 57 are operated together and the Plunger 70 is m Pushing Lever A 46 pushed upward the compressed air in the valve piston lower chamber is discharged from the bottom Na of the Plunger 70 As a result the compressed air in the accumulator xx pushes down the Valve Piston 66 blocking the air supply vent and opening the exhaust valve 2 When the exhaust valve opens the compressed air in the feed valve chamber is discharged into the To the head valve chamber atmosphere through the air passage Accumulator Air supply vent 3 When the air pressure applied on the bottom surface Air passage of the Head Valve 11 overcomes the strength of the Head Valve Spring 9 the Head Valve 11 is pushed upward At this time the Head Valve 11 seals with Exhaust Valve Rubber A 8 blocking Exhaust valve the passage to the exhaust vent 4 When the Head Valve 11 goes up the compressed Valve Piston 66 air in the accumulator flows rapidly into the Cylinder 15 forcing the Piston 29 downward to strike the E Valve piston lower chamber Plunger 70 Fig 6 Control valve section nail When the Piston 29 passes the cylinder h
22. deformed or cracked e The Piston 29 is abnormal driver blade deformed seal surface deformed D Nose valve bushing The Valve Packing 19 is damaged The O Ring 1AP 3 22 of the Plunger 21 is abnormal worn broken flawed The O Ring S3 23 of the Plunger 21 is abnormal worn broken flawed e The screw of the Valve Bushing 25 is loose E Control valve 1 The O Ring 67 of the Valve Piston 66 is abnormal worn broken flawed The O Ring 64 of the Valve Piston 66 is abnormal worn broken flawed The O Ring S 18 63 is abnormal broken flawed The internal surface part of the valve cavity of the Body Ass y 34 is abnormal The O Ring 64 upper side of the Valve Piston 66 is abnormal worn broken flawed The Head Valve O Ring 61 of Valve Bushing B 62 is abnormal broken flawed The valve room upper surface O of the Body Ass y 34 is abnormal F Control valve Il The O Ring 69 lower side of the Plunger 70 is abnormal worn broken flawed e The Valve Bushing A 71 is abnormal Plunger 70 sliding surface deformed or flawed The O Ring 69 upper side of the Plunger 70 is abnormal worn broken flawed e The Valve Piston 66 is abnormal plunger sliding surface deformed or flawed G Cap A 53 Gasket B 52 is damaged e The Hex Socket Hd Bolt
23. ding Examples of uses for the nails shown in 5 2 for Wall installing finish materials or molding as shown in Base molding Fig 2 Nail Typical mounting methods are shown in circles A and B Rabbeted stool Base molding Base shoe Wainscot Fig 2 Examples of molding 2785 5 5 4 Nail Driving Force Fig 3 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 required for driving the nail allows the nail to be fully driven For example when driving a 1 8 mm dia by 65 mm 5 64 by 2 1 2 nail into six sheets of 12 mm plywood 72 mm thick with the Model NT 65MA a pressure of about 6 3 bar 6 4 kgf cm 91 psi allows the nailer to drive the nail flush with the surface A pressure beyond this causes the nail head to be driven below the wood surface Fig 3 should be used as reference data because those values vary depending on the type of wood moisture content and grain of wood Required nailing energy Nailer output energy ft lb J ft lb kgf cm kgf cm 60 i 80 80 eom see AP Mea BG 800 NT65MA NT65AA 60 60 600 40 40 40 400 20 200 20 20 8 3
24. educe the service life of the driver blade In such a case replace the driver blade Driver blade 3 30 Fig 9 come 9 3 Possible Cause and Correction of Air Leakage Air leakage repair location D cq f H a OL Chan paia a D 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 and damage 3 And then check other places Air leakage points Possible cause With control valve OFF With control valve ON A Exhaust port The O Ring 10 of the Head Valve 11 is abnormal or its sliding surface or part is worn deformed or flawed Head Valve Rubber A 13 is abnormal or its sliding surface or part of the Cylinder 15 is worn or flawed Exhaust Valve Rubber A 8 is abnormal or its sliding surface or part of the Head Valve 11 is worn or flawed B Exhaust cover e Hex Socket Hd Bolt M6 x 16 1 is loose The Gasket 7 is damaged e The seal surface of the Body Ass y 34 or Exhaust Cover 5 is abnormal 18 Air leakage points Possible cause With control valve OFF With control valve ON C Blade guide The Cylinder O Ring 16 is abnormal broken flawed The Piston Bumper 30 is abnormal part damaged
25. he driving e Replace the part be driven uneven damaged oiling needed operation takes place e Apply grease e Head valve rubber abnormal torn e While idle driving check if the driver blade is e Replace the part damaged held down e Abnormal spring in head valve fatigued Replace the part damaged Control valve section e After making idle driving check if the driver e Replace the part e Abnormal plunger valve piston valve blade keeps the down position bushing A or valve bushing B burrs damaged e O ring worn or oiling needed e Disassemble the control valve and check Apply grease the O ring 2 Nails bent e For short nails the adjuster is raised too e Check if the adjuster is raised too high e Turn the adjuster for lower lower the pressure while being driven e Nails are not fully fed into the ejecting port See item 1 e See item 1 e Unspecified nails used e See item 1 e See item 1 e Driver blade worn e Check if the driver blade tip is abnormally Replace the part worn e Regrind see 9 2 Regrinding the Driver Blade e The material being driven into is very hard Check if a nail is bent even when driven into Unusable because the tool is not designed for soft wood such usage 3 The driven nail The adjuster is improperly adjusted e Turn the adjuster to the lowest position then e Adjust the adjuster for the proper position is driven into the
26. ing O Ring Piston Bumper Bumper Sheet Body Ass y 31 Assembly Diagram for NT 65MA L i SE TEEN b 55 32 IMET r E PARTS NT 65MA CODE NO DESCRIPTION REMARKS 949 755 HEX SOCKET HD BOLT M6X16 10 PCS 880 515 PLATE 880 514 TOP COVER 949 757 HEX SOCKET HD BOLT M5X20 10 PCS 882 940 EXHAUST COVER 881 714 NOSE 880 358 GASKET 881 761 EXHAUST VALVE RUBBER A 880 356 HEAD VALVE SPRING 980 879 O RING S 34 880 354 HEAD VALVE 878 714 CYLINDER O RING C 1 0 44 7 881 760 HEAD VALVE RUBBER A 880 669 RETAINING RING 881 759 CYLINDER 877 312 CYLINDER O RING I D 63 1 878 716 O RING P 46 CAUTION PLATE 881 711 VALVE PACKING 881 900 SPRING 881 712 PLUNGER 873 093 O RING 1AP 3 881 715 O RING S3 987 105 O RING S 10 881 710 VALVE BUSHING 881 713 KNOB 881 740 PISTON RING 880 311 O RING I D 34 2 881 763 PISTON 881 741 PISTON BUMPER 881 756 BUMPER SHEET 955 479 RETAINING RING E TYPE FOR D6 SHAFT 878 184 WARNING LABEL 881 757 BODY ASS Y 881 764 GUIDE PLATE B 949 661 HEX SOCKET HD BOLT M6X30 10 PCS 881 743 GUIDE PLATE A 881 747 LOCK LEVER 949 770 ROLL PIN D4X14 10 PCS 949 685 ROLL PIN D3X20 10 PCS 877 894 HOLDER SPRING 881
27. item 1 e See Magazine in item 1 nails and check if the nail feeder operates smoothly e Driver blade worn e Check if the driver blade tip is worn e Replace the part e Regrind see 9 2 Regrinding the Driver Blade lt The driver blade does not return e Perform idle driving or actually drive with e See lt Output section piston driver blade etc in completely gt nails and check if the driver blade returns item 1 e See Output section piston driver blade completely etc in item 1 5 Air keeps blowing from the nose of the blow nozzle 6 Air blow is stopped or weakened by pressing the button of the blow nozzle all the way in Possible cause most common cause e Spring is abnormal fatigued damaged e The O ring of the plunger is abnormal dislocated deformed damaged Insufficient press fitting of the button Inspection methods e Press the button of the blow nozzle to check e Replace the spring if it operates smoothly e Reassemble or replace e Press the button of the blow nozzle all the e Press fit the button knob into the proper position way in to check if the button contacts the valve bushing 9 2 Regrinding the Driver Blade The tip of the driver blade should be ground as shown in Fig 9 To grind with a grinder gradually grind the tip while cooling the ground area with water to prevent it from being excessively heated Excessive grinding will rapidly r
28. material but the head is Air pressure too low e Adjust for 5 to 8 5 kgf cm 4 9 8 3 bar 70 120 raised above the surface e The material being driven into is very hard e Drive the nail into soft wood and check if the e Unusable because the tool is not designed for head is raised or not such usage e Driver blade worn e Check if the driver blade tip is worn e Replace the part e Regrind see 9 2 Regrinding the Driver Blade Possible cause most common cause Inspection methods 3 The driven nail e Piston ring is abnormal worn damaged Disassemble the output section and check Replace the defective part is driven into the piston ring and the internal surface of the material the cylinder for abnormal condition but the head is raised above Cylinder s internal surface abnormal worn Replace the defective part the surface e Exhaust valve rubber abnormal worn Disassemble and check the exhaust valve damaged flaws on seal surface rubber part for abnormal condition e Head valve sliding surface abnormal Check the sliding surface for abnormal Replace the defective part uneven damaged oiling needed conditions and need o oiling e Apply grease 4 Nails clog the Unspecified nails used e Check if the nails are specified ones e Use specified genuine nails mechanism lt lmproper nail feed gt e Check if they move smoothly after loading e See Magazine in
29. ng section PIN Guide Plate Valve Packing 19 O Ring 1AP 3 22 Valve Piston 66 xj t 7 Lu 0 aa Uu riv Valve Bushing B 62 Spring 20 PI 21 O Ring S 10 24 unger 21 Valve Bushing 25 Plunger 70 Valve Bushing A 71 Cross sectional view of blow nozzle Control valve section Body Ass y 34 Top Cover 3 4 Exhaust Cover 5 Knob 26 Cap A 53 Magazine Cover 72 Exhaust Valve Rubber A 8 Control valve section O Head Valve 6 Rubber A 13 Accumulator Cylinder 15 Piston Bumper 30 35 Lock Lever 38 Magazine section Guide Plate A 37 Pushing Lever A 46 Fig 4 Construction 8 2 Valve Bushing B and Plunger Among the newly designed parts the difference between the new design and the current one are shown below for valve bushing B and the plunger because their shapes are so similar Newly designed part Current part NV 50AE NV 50AG Valve bushing B Notches are Width 4 mm Color Black added 4 pcs depth 0 3 mm No notches Color Aluminum Silver Plunger Hole Dia 0 2 mm O Ring groove 2 Groove Overall length 33 9 mm O Ring groove gt gt 1 pe Overall length 38 mm 8 3 I
30. nterchangeability of Parts The paris which are not interchangeable with those of the Model NT 65AA are given in the table below The numbers in Bold indicate the item numbers in the Model NT 65MA Parts List Parts for Top Cover 3 2 Plate 3 Top Cover 5 Exhaust Cover 6 Nose 18 Caution Plate 19 Valve Packing 20 Spring 1211 67 22 O Ring 1AP 3 23 O Ring S3 24 O Ring S 10 25 Valve Bushing 26 Knob 1 Hex Socket Hd Bolt M6 x 16 Newly designed Newly designed Newly designed Newly designed Newly designed Newly designed Newly designed Newly designed Newly designed Newly designed Common to the Models NR 90AC and NV 65AH Common to the Models NR 90AC and NV 65AH Common to the Models NR 90AC and NV 65AH NT 65MA NT 65AA Common to the Model NT 50AD 10 8 4 Operation Principle 1 Before nailing Fig 5 Fig 6 1 When compressed air is fed to the main body it fills 2 At the same time the compressed air flows into the valve piston lower chamber of the control valve section and forces the Valve Piston 66 upward Also the compressed air is fed through the air supply vent and air passage to the head valve Exhaust Valve Rubber A 8 Exhaust vent Head valve chamber Head Valve Spring 9 Head Valve 11 Air passage Control valve section Accumulator Piston 29 Cylinder 15 ch
31. ole the compressed air flows into the return air chamber and is accumulated there z 3 During return Fig 7 Fig 8 Exhaust Valve Rubber A 8 1 When either Pushing Lever A 46 or Trigger A Exhaust vent Head valve chamber 57 is released the Plunger 70 goes down and the Accumulator compressed air in the accumulator flows into the Head Valve 11 passage Control valve section valve piston lower chamber 2 As the air pressure in the valve piston lower chamber Cylinder 15 increases to overcome the air pressure applied on the upper portion of the Valve Piston 66 the Valve Return air chamber Piston 66 is forced upward When this occurs the exhaust valve is closed and the air supply vent is Piston 29 opened Trigger A 57 Piston 3 When the air supply vent opens the compressed air Bumper 30 in the accumulator 8 passes through the air passage and flows into the head valve chamber to Driver blade push down the Head Valve 11 As a result the Head Valve 11 and Cylinder 15 are sealed and Pushing Lever A 46 l at the same time the Head Valve 11 and Exhaust Valve Rubber A 8 are released to open the exhaust vent 4 The compressed air at the upper portion of the Piston 29 is discharged into the atmosphere through the exhaust vent In this way the air pressure at the upper portion of the Piston 29 is reduced and the greater pressure of the air To
32. putting the Retaining Ring 14 into the groove in the Body Ass y 34 the opening of the Retaining Ring 14 must not overlap with the retaining ring detaching groove 10 3 Disassembly and Reassembly of the Control Valve Section See Fig 15 Retaining Ring E type for D6 Shaft 32 Roll Pin x 28 56 Body Ass y 34 Trigger A 57 Trigger Pin 58 Valve Bushing B 62 63 O Ring S 18 O Ring 1 0 8 8 64 amp Valve Piston 66 O Ring 1 0 8 8 64 O Ring I D 11 67 Plunger Spring 68 O Ring I D 1 8 69 Plunger 70 pa O Ring I D 1 8 69 b Valve Bushing A 71 Fig 15 Disassembly and reassembly of the control valve section Remove Pushing Lever B 42 M aesassas 14 SS SS SY NANA 2 7 8 N 1 Screwdriver SSSA 1 HES Plunger 70 SSS ES gt 4 Sees s SSS N 24 Tools required e Flat blade screwdriver e Roll pin puller 3 mm dia e Hex bar wrench 4 mm e Remove the Retaining Ring E type for D6 Shaft 32 with the blade of a screwdriver and remove the Trigger Pin 58 and Trigger A 57 can be removed e To remove Trigger A 57 together with the driving section Pushing Le
33. the head valve chamber accumulated in the return air chamber pushes the Accumulator Piston 29 upward Air supply vent 5 If the air pressure at the lower portion of the Piston 29 is higher than that of the atmosphere after the Passage Piston 29 has fully returned the excess air pressure is discharged into the atmosphere through the clearance between the Piston Bumper 30 and the driver blade Exhaust valve Valve Piston 66 Valve piston lower Plunger 70 chamber Fig 8 Control valve section 12 9 TROUBLESHOOTING GUIDE 9 1 Troubleshooting and Correction 1 Nails cannot be driven Nails e The magazine is not loaded with specified genuine nails e The magazine is loaded with abnormal nails bent nails abnormal collation other Magazine e Nail feeder abnormal burrs deformed damaged e Ribbon spring abnormal fatigued damaged e Magazine groove too wide or too narrow e Nail rail groove width too wide or too narrow e Nail groove in the blade guide abnormal burrs e Magazine cover abnormal deformed damaged e Adhesive fragments and wood chips are on the magazine nail feeder or nail rail lt Output section piston driver blade etc gt e Air pressure too low e Piston ring worn e Piston bumper abnormal e The O ring of the cylinder is abnormal dislocated deformed damaged e Driver blade abnormal deformed burrs damaged
34. ust Cover 5 and force out the Exhaust Valve Rubber A 8 with a hammer Now the parts forming the Exhaust Cover 5 can be taken out Fig 10 Disassembly and reassembly of the exhaust cover head valve exhaust CAUTION To prevent damage to the Exhaust Valve valve rubber A valve bushing etc Rubber A 8 do not use a pointed bar or a bar with a diameter of less than 4 mm o4 Hammer Exhaust Cover 5 A Force out 4 to 5 mm dia bar 5 5 mm dia hole Q Exhaust Valve AY DL ZA KA Za Y Rubber A 8 1 94 ANC AN DE N b Reassembly Exhaust Valve Rubber A 8 Disassembly procedures should be followed in Charge with 3 grams the reverse order Note the following points Head Valve 11 of grease Exhaust Cover 5 e Charge the sliding portion of the Head Valve 11 of the Exhaust Cover 5 with about 3 grams of grease and apply grease to each surface of the O rings e As shown in Fig 12 firmly push the Exhaust Valve Rubber A 8 until it is fully seated over the projection of the Exhaust Cover 5 e As shown in Fig 13 push down the Knob 26 on a flat workbench until the clearance between the Knob 26 and the Plunger 21 becomes 2 to 2 5 mm Push down as far as it will go Push down Knob 26 Plunger 21 Valve Bushing 25 Flat workbench Fig 13 22 _ 2 Disassembly
35. ver B 42 Blade Guide 43 etc remove Trigger A 57 while forcing down the Plunger 70 with the blade of the screwdriver as shown in Fig 16 When disassembling do not pull out this part by gripping it with pliers SS w H 1 Ki LA A 71 surface 4 5 mm dia bar Head Valve O Ring I D 16 8 61 Valve Bushing B 62 Valve Piston 66 Valve Bushing Plunger 70 Valve Bushing B 62 Be careful not to damage the internal Wire with 1 5 3 mm dia Fig 18 25 e Pull out the Roll Pin D3 x 28 56 with the roll pin puller 3 mm 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 17 put in the 4 5 mm dia bar from the upper side of the Body Ass y 34 and push the top of the Valve Piston 66 Now the parts forming the control valve can be taken out except the Valve Bushing A 71 and Head Valve O Ring 1 0 16 8 61 CAUTIONS e Be careful not to damage Valve Piston 66 Valve Bushings A and B 71 and 62 etc e Do not pull out the end of Plunger 70 with pliers 3 To take out Valve Bushing B 62 put a 1 5 3 mm 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
36. w W Washer Sleeve 49 M5 x 16 81 Hex Socket Hd Bolt W Flange 5 20 80 0 AN Ribbon Spring 73 Magazine 83 Feeder Plate 74 gt Roll Pin D2 5 x 20 75 A Tools required ePhillips screwdriver S Hex bar wrench 4 mm Nail Feeder A 76 1 Nail Feeder B 78 eRoll pin puller 2 5 mm dia Pushing Spring 77 Fig 22 Disassembly and reassembly of the magazine section a Disassembly e Remove the Hex Socket Hd Bolt W Flange M5 x 20 80 with the hex bar wrench 4 mm and so that the entire magazine section can be removed and the Ribbon Spring 73 Nail Feeders A and 76 and 78 and Nail Rail 79 can be taken out e Remove the two Machine Screws W Washer M5 x 16 black 81 with the Phillips screwdriver so that the Magazine 83 and Magazine Cover 72 can be removed e Pull out the Roll Pin D2 5 x 20 75 with the roll pin puller 2 5 mm dia so that Nail Feeder A 76 Nail Feeder B 78 and the Pushing Spring 77 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points e The Hex Socket Hd Bolt W Flange M5 x 20 80 should be tightened while pressing the Magazine 83 and Magazine Cover 72 so that there will be no space between the Magazine 83 and Blade Guide 43 e Lubricate the Nail Rail 79 and Ribbon Spring 73 with Hitachi pneumatic tool lubricant to smooth the movement of Nail Feeders A and
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