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TECHNICAL DATA

AND

SERVICE MANUAL

FINISH NAILER

NT 65MA2

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

LIST No. E011

Aug. 2003

N

MODEL

NT 65MA2

Hitachi

Power Tools

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Summary of Contents for NT 65MA2

Page 1: ...TECHNICAL DATA AND SERVICE MANUAL FINISH NAILER NT 65MA2 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No E011 Aug 2003 N MODEL NT 65MA2 Hitachi Power Tools ...

Page 2: ... 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 SENCO SFN40 R BOSTITCH N62FN Q PORTER CABLE DA250B P DEWALT D51275 S ...

Page 3: ...nism 8 8 2 Interchangeability 10 8 3 Operation Principle 13 9 TROUBLESHOOTING GUIDE 16 9 1 Troubleshooting and Correction 16 9 2 Regrinding the Driver Blade 18 9 3 Possible Causes and Correction of Air Leakage 19 10 DISASSEMBLY AND REASSEMBLY 21 10 1 General Precautions in Disassembly and Reassembly 21 10 2 Disassembly and Reassembly of the Output Section 22 10 3 Disassembly and Reassembly of the ...

Page 4: ...rrent Model NT 65MA is provided with the contact actuation mechanism only 2 Equipped with the same head valve of solid rubber as the Model NR 65AK the current Model NT 65MA is equipped with the head valve made of plastic and rubber 3 Equipped with the O ring for sliding the piston the current Model NT 65MA is equipped with the piston ring 3 APPLICATIONS For manufactured housing on site and mobile ...

Page 5: ...0 ltr cycle at 6 9 bar 1 20 ltr cycle at 7 kgf cm2 042 ft3 cycle at 100 psi 3 8 NPT thread Corrugated cardboard box Sleeve type 430 mm x 380 mm x 113 mm 16 15 16 x 14 15 32 x 4 7 16 Safety glasses Code No 875769 1 Hex bar wrench for M5 screw Code No 944458 1 Hex bar wrench for M6 screw Code No 944459 1 Case Code No 881775 1 Nose cap A Code No 881751 1 Full sequential actuation mechanism kit Code N...

Page 6: ...the trigger next press the push lever against the wood to drive the nail After nailing once nailing will not be possible again until the trigger is released and pressed again CONTACT ACTUATION MECHANISM First press the push lever against the wood next pull the trigger to drive the nail First pull the trigger next press the push lever against the wood to drive the nail If the trigger is held back a...

Page 7: ...mage to the nailer 15 gauge finish nail collating angle 34 Min Max 2 4 mm 095 34 Fig 1 Dimensions of nails 1 8 mm 072 32 mm 1 1 4 3 0 mm 12 1 1 mm 045 2 4 mm 095 1 8 mm 072 65 mm 2 1 2 3 0 mm 12 1 1 mm 045 Tapes 5 4 Examples of Nail Use Examples of uses for the nails shown in 5 2 for installing finish materials or molding as shown in Fig 2 Typical mounting methods are shown in circles A and B A Cr...

Page 8: ...ood Required nailing energy Nailer output energy P S NT 65MA NT 65MA2 R Q Plywood 12 mm 472 thick x 6 Fig 3 Required nailing energy and nailer output energy 5 6 Optional Accessories Full sequential actuation mechanism kit sequential trip mechanism kit Code No 884320 A full sequential actuation mechanism kit sequential trip mechanism kit is provided as an optional accessory for the Model NT 65MA2 B...

Page 9: ... 11 27 32 x 3 11 32 None None Single touch operation by hand Horizontal dial Rubber 34 2 4 mm to 3 0 mm 095 to 12 32 mm to 65 mm 1 1 4 to 2 1 2 5 4 to 7 6 bar 5 5 to 7 7 kgf cm 2 80 to 110 psi 1 2 ltr cycle 042 ft 3 cycle 100 nails Rear loading type Angle 26 2 2 kg 4 8 lbs R Only 4 directions by 90 each by replacing the piece 334 mm x 287 mm x 90 mm 13 5 32 x 11 5 16 x 3 17 32 None None Single tou...

Page 10: ...ot nailer is optionally available and recommend it to the customers who want to use it Refer to the leaflet attached together with the Instruction Manual for details 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 elimina...

Page 11: ...into four sections output section control valve section driving section and magazine section The basic construction of the Model NT 65MA2 is the same as that of the Model NT 65MA and the interchangeable components are used as much as possible Primary differences from the Model NT 65MA are described below Output section The head valve construction was simplified and the O ring was adopted for slidi...

Page 12: ...e Cylinder 11 Piston Bumper 25 Guide Plate B 30 Lock Lever 34 Guide Plate A 32 Blade Guide 38 Pushing Lever A 41 Knob 24 Trigger A 52 Body Ass y 29 Magazine section Nail Feeder B 79 Magazine 81 Nail Rail 78 Magazine cover 70 Nail Feeder A 74 Valve Piston B 63 Valve Bushing B 59 Switching Device Change Knob 55 Fig 4 Construction Control valve section Plunger Spring 65 Valve Bushing A 68 Plunger A 6...

Page 13: ... 1 Parts that are not interchangeable with those of the Model NT 65MA NT 65MA2 NT 65MA Bore diameter is concave Parts Exhaust Cover 5 Newly designed 2 1 mm 083 dia hole Head Bumper 7 Common to the Model NR 65AK etc Head Valve Spring 8 Common to the Model NR 65AK etc O ring P 22 9 Common to the Model NR 65AK etc Head Valve A 10 Common to the Model NR 65AK etc Newly designed Cylinder 11 O ring I D 3...

Page 14: ...ve Bushing B 59 Mark of switcning Trigger A 52 Spring C 54 No notches Newly designed Change Knob 55 Color Aluminum silver Notches are added 4 pcs 26 30 2 Newly designed 20 4 24 7 Newly designed Grip tape 7 mm 276 dia hole Common to the Model NR 90AC3 Common to the Model NR 90AC3 O ring S 4 62 Common to the Model NR 65AK etc Common to the Model NR 65AK etc Color Black ...

Page 15: ...del NR 90AC3 Be careful not to make mistakes in mounting Plunger A 66 because it is similar to that of the Models NR 90AC3 and NR 65AK O ring groove 2 pcs 2 Parts that are interchangeable with those of the Model NT 65MA though their code numbers are different Top Cover 3 Knob 24 Lock Lever 34 Pushing Lever B 37 Adjuster 39 Pushing Lever A 41 Pushing Lever Guide 56 Nail Rail 78 NT 65MA2 884332 8843...

Page 16: ...ve 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 overcomes the strength of the Head Valve Spring 8 Head Valve A 10 is pushed upward At this time Head Valve A 10 seals with Exhaust Cover 5 blocking the passage to the exhaust vent 4 When Hea...

Page 17: ...the exhaust vent 4 The compressed air at the upper portion of the Piston 15 is discharged into the atmosphere through the exhaust vent In this way the air pressure at the upper portion of the Piston 15 is reduced and the greater pressure of the air accumulated in the return air chamber pushes the Piston 15 upward 5 If the air pressure at the lower portion of the Piston 15 is higher than that of th...

Page 18: ...iston lower chamber and Valve Piston B 63 is forced upward The Piston 15 then returns fully upward Therefore unless Trigger A 52 is released after each nailing operation the structural mechanism prevents the next nailing operation Contact actuation mechanism Switching device downward position 1 Immediately after the first nail is driven the control valve should be as shown in Fig 8 2 Even when onl...

Page 19: ...spring is abnormal faigued or damged Correct the burred or deformed portion Replace the part Replace the part Nail rail groove width too wide or too narrow Nail groove in the blade guide is abnormal burrs deformed or damaged Magazine cover is abnormal deformed or damaged Adhesive fragments and wood chips are on the magazine nail feeder or nail rail Check if they move smoothy after loading nails an...

Page 20: ...ade Replace the O ring Replace the part Apply grease Disassemble the output section and check the o ring and the inside of the cylinder for abnormality Control valve section Plunger A valve piston B valve bushing A or valve bushing B is abnormal seized or damaged Disassemble the control valve section and check the O rings 2 Nails are driven but bent Unspecified nails are used Driver blade is worn ...

Page 21: ...piston driver blade etc Check each part for abnormalities worn damaged deformed etc 6 Air keeps blowing from the nose of the blow nozzle O ring in valve piston B is worn Replace the part Abnormal plunger A trigger arm A pushing lever B and or body worn or damaged The position of a switching device is mistaken The position of a switching device is checked A switching device is set to the correct po...

Page 22: ...logged with dust Air leakage point Possible cause With control valve OFF With control valve ON B Exhaust cover A B C d b a G 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 F E D Head Valve A 10 and Cylinder 11 are abnormal seal sur...

Page 23: ...nger A 66 is abnormal worn broken or damaged Valve Bushing A 68 is abnormal sliding surface of Plunger A 66 is deformed or scratched The Piston Bumper 25 is abnormal d or e portion is damaged deformed or cracked The Piston 15 is abnormal driver blade or sealed face is deformed The e surface of the Body Ass y 29 is deformed The upper O Ring I D 8 8 61 on Valve Piston B 63 is abnormal worn broken or...

Page 24: ...mbly Apply grease ATTOLUB No 2 Code No 317918 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 30 cc 1 oz Oil feeder Code No 877153 120 cc 4 oz Oil feeder Code No 874042 1 ltr 1 quart Can Code No 876212 If the Gasket 6 is damaged replace it and check that no air is leaki...

Page 25: ... wrench 4 mm and remove the Exhaust Cover 5 Then the components of the output section such as the Cylinder 11 Piston 15 Piston Bumper 25 with the Bumper Sheet 26 assembled etc can be removed Remove the Hex Socket Hd Bolt M6 x 12 1 with a hex bar wrench 5 mm The Plate 2 and Top Cover 3 can now be removed Hex Socket Hd Bolt M6 x 12 1 Plate 2 Top Cover 3 Exhaust Cover 5 Hex Socket Hd Bolt M5 x 20 4 G...

Page 26: ...shing plunger etc a b c 2 Disassembly and reassembly of the Valve Bushing 22 Plunger 18 etc See Fig 14 Tools required Socket wrench 14 mm Flat blade head screwdriver a Disassembly Remove the Valve Bushing 22 with a socket wrench 14 mm The Valve Packing 16 and the Spring 17 can now be removed Remove the Knob 24 and the Retaining Ring E type for D4 Shaft 23 then the Plunger 18 can be removed from th...

Page 27: ...trol valve section Pushing Lever B 37 Remove Trigger A 52 Force down Screwdriver Fig 16 Plunger A 66 O Ring S 4 62 Head Vavle O ring I D 16 8 58 Change Knob 55 Trigger A 52 Spring C 54 Carefully disassemble so as not to lose these parts a Disassembly Remove the Retaining Ring E type for D6 Shaft 27 with the blade of a screwdirver and pull out the Change Knob 55 being careful not to lose the Steel ...

Page 28: ...t to damage Valve Piston B 63 Valve Bushings A 68 and B 59 etc Do not pull out the end of Plunger A 66 with pliers 3 To take out Valve Bushing B 59 put a 1 5 to 3 mm 059 to 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 59 as shown in Fig 18 Push 4 to 5 mm 157 to 197 dia bar Body Ass y 29 Head ...

Page 29: ...oll pin hole in the Body Ass y 29 First insert a roll pin puller 3 mm 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 51 If an attempt is made to drive the roll pin with force when the roll pin groove in Valve Bushing A 68 is not aligned with the roll pin hole in the Body Ass y 29 it will damage the periphery of Valve Bushin...

Page 30: ...the two Hex Socket Hd Bolts M6 x 30 31 with the hex bar wrench 5 mm Now the Blade Guide 38 Guide Plates A 32 and B 30 Pushing Lever B 37 etc can be removed Remove the two Ratchet Springs 40 from the Adjuster 39 with the small flat blade screwdriver being very careful not to lose them Now the Adjuster 39 can be removed from Pushing Lever B 37 Nylon Nut M5 43 Sleeve 44 Body Ass y 29 Blade Guide 38 G...

Page 31: ...r making the Blade Guide 38 Guide Plates A 32 and B 30 flush with the Body Ass y 29 After assembly check that Pushing Levers A 41 B 37 and the Adjuster 39 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 Hex bar wrench 4 mm a Disassembly Remove the three Hex Socket Hd Bolts M5 x 16 49 with the hex bar...

Page 32: ...oved and the Ribbon Spring 71 Nail Feeders A 74 B 79 and Nail Rail 78 can be taken out Remove the two Machine Screws W Washer M5 x 16 Black 77 with the Phillips screwdriver so that the Magazine 81 and the Magazine Cover 70 can be removed Pull out the Roll Pin D2 5 x 20 73 with the roll pin puller 2 5 mm 098 dia so that Nail Feeder A 74 Nail Feeder B 79 and the Pushing Spring 75 can be removed b Re...

Page 33: ... that the Model NT 65MA2 does not operate just by pulling Trigger A 52 2 Check that the Model NT 65MA2 does not operate just by pressing Pushing Lever A 41 against a test piece wood etc 3 Check that the Model NT 65MA2 operates by pulling Trigger A 52 first then pressing Pushing Lever A 41 against a test piece 4 Set the Change Knob 55 to single actuation single sequential actuation see 5 2 Check th...

Page 34: ...ng General Assembly Pushing Lever B Holder Spring Adjuster Pushing Lever A Piston O ring Trigger A Pushing Lever Guide Valve Bushing B Valve Piston B Plunger Spring Plunger A Valve Bushing A Head Valve O ring O ring x 6 Adjustment Cylinder Body Valve Guide Plate B Guide Plate A Plate Guide Magazine Magazine Cover Nail Feeder A Nail Rail Nail Feeder B Body Cylinder Cylinder O ring O ring Piston Bum...

Page 35: ...tachi Power Tools 10 16 17 18 19 20 21 22 23 24 14 15 25 26 27 28 29 30 31 32 33 34 35 36 37 43 44 45 46 47 48 49 50 51 52 53 55 51 56 57 58 59 60 61 62 63 61 64 65 66 67 68 69 70 71 76 77 78 79 80 81 43 72 73 74 75 38 39 40 41 42 11 12 13 1 2 3 4 5 6 8 9 7 54 501 502 503 504 505 506 ...

Page 36: ...G 1 23 968 643 RETAINING RING E TYPE FOR D4 SHAFT 1 24 884 334 KNOB 1 25 881 741 PISTON BUMPER 1 26 881 756 BUMPER SHEET 1 27 955 479 RETAINING RING E TYPE FOR D6 SHAFT 1 28 884 070 WARNING LABEL 1 29 884 328 BODY ASS Y 1 INCLUD 45 30 881 764 GUIDE PLATE B 1 31 949 661 HEX SOCKET HD BOLT M6X30 10 PCS 2 32 881 743 GUIDE PLATE A 1 33 949 770 ROLL PIN D4X14 10 PCS 1 34 884 323 LOCK LEVER 1 35 949 685...

Page 37: ...2 981 317 O RING S 4 1 63 884 143 VALVE PISTON B 1 64 878 887 O RING I D 11 1 65 878 884 PLUNGER SPRING 1 66 884 144 PLUNGER A 1 67 878 888 O RING I D 1 8 1 68 880 671 VALVE BUSHING A 1 69 LABEL 1 70 881 752 MAGAZINE COVER 1 71 881 755 RIBBON SPRING 1 72 881 745 FEEDER PLATE 1 73 881 767 ROLL PIN D2 5X20 STAINLESS 1 74 881 746 NAIL FEEDER A 1 75 880 321 PUSHING SPRING 1 76 881 773 HEX SOCKET HD BO...

Page 38: ...458 HEX BAR WRENCH 4MM 1 502 944 459 HEX BAR WRENCH 5MM 1 503 875 769 SAFETY GLASSES 1 504 881 775 CASE 1 505 884 337 CAUTION TAG 1 506 884 120 LEAFLET 1 601 884 320 FULL SEQUENTIAL ACTUATION MECHANISM KIT 1 INCLUD 602 606 602 884 321 TRIGGER A 1 603 881 778 PLUNGER B 1 604 878 888 O RING I D 1 8 1 605 880 672 VALVE PISTON B 1 606 884 322 TRIGGER PIN 1 607 881 768 GRIP TAPE A 1 608 880 407 TAPE 2 ...

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