Hitachi NR 83AA3 Technical Data And Service Manual Download

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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 remove all nails and disconnect the air hose from the

nailer (with your finger released from the trigger) to exhaust all the compressed air.

10-1. General Precautions in Disassembly and Reassembly

Apply grease (ATTOLUB No. 2 Code No. 317918) to the O-rings and the sliding portions. Note that another

grease (MULTEMP PS No. 2 Code No. 939301) must be applied to the O-rings and the sliding portions of the

control valve section. Do not scratch the O-rings nor adhere dust to them when mounting.

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) [5] 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.

Use the conventional grip tape for repair of the Grip Rubber [36] because the Grip Rubber [36] cannot be

mounted without the specifically designed jig.

Tightening torque for each part

Bolt

Tightening torque

•

m (kgf

•

cm, ft-lb)

Nylock Hex. Socket Hd. Bolt M8 x 22 ........................... [31]

30.4 2 (310 20, 22.4 1.4)

25.5 1 (260 10, 18.8 0.7)

12.7 0.8 (130 8, 9.4 0.6)

9.8 0.8 (100 8, 7.2 0.6)

Hex. Socket Hd. Bolt (W/Flange) M6 x 45 .................... [1]

Nylock Bolt (W/Flange) M8 x 16 .................................... [33]

Nylock Bolt (W/Flange) M6 x 12 .................................... [29]

Hex. Socket Hd. Bolt M5 x 18 ....................................... [39]

Hex. Socket Hd. Bolt (W/Sp. Washer) M6 x 25 ............. [3]

Hex. Socket Hd. Bolt (W/Flange) M6 x 12 .................... [80]

8.3 0.5 (85 5, 6.1 0.4)

Summary of Contents for NR 83AA3

Page 1: ...TECHNICAL DATA AND SERVICE MANUAL STRIP NAILER NR 83AA3 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT LIST No E009 Jul 2003 N MODEL NR 83AA3 Hitachi Power Tools ...

Page 2: ... 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 Symbols Utilized Competitors Company Name Model Name SENCO FP650 R PASLODE F350S Y ...

Page 3: ...Mechanism 10 8 2 Interchangeability 12 8 3 Operation Principle 15 9 TROUBLESHOOTING GUIDE 19 9 1 Troubleshooting and Correction 19 9 2 Regrinding the Driver Blade 22 9 3 Possible Causes and Corrections of Air Leakage 22 10 DISASSEMBLY AND REASSEMBLY 25 10 1 General Precautions in Disassembly and Reassembly 25 10 2 Disassembly and Reassembly of the Output Section 26 10 3 Disassembly and Reassembly ...

Page 4: ...s added to select the nailer operation between single actuation single sequential actuation and contact actuation the current Model NR 83AA2 is provided with the contact actuation mechanism only The features such as rapid driving and quick response good balance and appearance that are well reputed in the current Model NR 83AA2 are common to the Model NR 83AA3 3 APPLICATIONS Floor and wall framing ...

Page 5: ...3 16 Hex bar wrench for M5 screw Code No 944458 1 Hex bar wrench for M6 screw Code No 944459 1 Hex bar wrench for M8 screw Code No 872422 1 Safety glasses Code No 875769 1 Full sequential actuation mechanism kit Code No 884069 Sequential trip mechanism kit Pneumatic tool lubricant 1 oz oil feeder Code No 877153 Pneumatic tool lubricant 4 oz oil feeder Code No 872042 Pneumatic tool lubricant 1 quar...

Page 6: ...UATION 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 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 F...

Page 7: ...or s model Paslode However some D head nails made by other makers are collated at a different angle of 26 degrees Use of such nails will cause clogging of nails and subsequent damage to the nailer Also avoid use of misaligned nails or nails collated with a weak paper tape It is recommended to use genuine HITACHI nails to ensure satisfactory driving quality 6 8 mm 0 266 2 9 mm 0 113 51 mm 2 Minimum...

Page 8: ...il of 3 3 mm dia by 83 mm length 0 131 x 3 1 4 into nine sheets of 12 mm plywood 108 mm thick with the Model NR 83AA3 a pressure of about 7 0 bar 7 1 kgf cm2 102 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 reference data because those values vary depending on the ty...

Page 9: ...pressing the push lever first against a workpiece and then pulling the trigger single shot operation and no nail is driven when pulling the trigger first and then pressing the push lever against a workpiece Please recommend the sequential trip mechanism kit to the customers who want to use it Salespersons must instruct the customers to read the Handling Instructions attached to the sequential trip...

Page 10: ... 8 5 kgf cm 2 70 120 psi 460 mm x 360 mm x 108 mm 18 1 8 x 14 3 16 x 4 1 4 NR 83AA2 2 50 ltr cycle 0 088 ft 3 cycle 86 nails Rear loading 3 8 kg 8 4 lbs None Rubber 50 mm 83 mm 2 3 1 4 2 9 mm 3 3 mm 0 113 0 131 5 8 5 kgf cm 2 70 100 psi 465 mm x 330 mm x 130 mm 20 13 16 x 12 3 4 x 5 2 60 ltr cycle 0 092 ft 3 cycle 84 nails Top loading 3 7 kg 8 2 lbs None Rubber 50 mm 90 mm 2 3 1 2 2 9 mm 3 3 mm 0 ...

Page 11: ...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 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...

Page 12: ...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 ...

Page 13: ...ibed below Output section Cylinder The sealing surface where the head cap contacts was chamfered common to the Model NR 83A2 Exhaust valve Provided with a hole 1 mm dia to prevent malfunction when selecting the single actuation single sequential actuation mechanism common to the Model NR 83A2 Body An air escape groove was provided at the inmost position of the trigger valve bushing The body is not...

Page 14: ...r Blade 7 Cylinder 6 Piston 4 Piston Bumper 9 Nose 10 Pushing lever Trigger Control valve section Safety valve portion Trigger valve portion Valve bushing Plunger B Nail stopper Magazine Magazine section Switching device Valve sleeve A Driving section Output section Firing gate Nail feeder ass y Accumulator 1 Control valve section Grip rubber Exhaust cover Exhaust Valve 2 ...

Page 15: ... cause a malfunction when selecting the single actuation single sequential actuation mechanism Note that the driving force may be decreased a little though no malfunction may occur if the exhaust valve for the Model NR 83AA3 1 mm dia hole is provided is mounted to the Model NR 83AA2 Do not mount the cylinder for the Model NR 83AA2 to the Model NR 83AA3 Otherwise the driving force may be decreased ...

Page 16: ...ation mechanism Do not mount the O ring I D 10 7 for the Model NR 83AA3 to the valve bushing of the Model NR 83AA2 Otherwise air leakage may occur Do not mount plunger A for the Model NR 83AA2 to the Model NR 83AA3 Otherwise plunger A may contact the body ass y and it may be damaged when raising the pushing lever ass y to the uppermost position There is no problem in mounting plunger A for the Mod...

Page 17: ...ice from coming off Washer M5 57 Receiver of Plunger B Spring 58 at the Valve Bushing 49 side Thickness 1 mm 10 mm dia 5 3 mm dia Wire dia 1 5 mm Inside dia 6 5 mm Outside dia 7 4 mm Overall length 28 mm Wire dia 1 5 mm Inside dia 4 5 mm O ring P 9 Wire dia 1 9 mm Inside dia 8 8 mm Plunger B 59 These parts are exclusive to the Model NR 83AA3 Parts that were changed for the Model NR 83AA3 and not i...

Page 18: ...he compressed air source air hose is connected to the nailer Air pressure is applied to the lower surface of the flanges located at the center portion of the Cylinder 6 forcing the cylinder upward The compressed air is thereby blocked from the upper end of the cylinder and no pressure is applied to the piston The Accumulator 1 fills with compressed air The trigger and pushing lever are not operate...

Page 19: ...lever are operated simultaneously NOTE If either the trigger or pushing lever are operated individually compressed air will not enter the valve air passage and the nailer will not function When the trigger and pushing lever are operated simultaneously the exhaust vents are closed Compressed air is applied to the upper side of the Exhaust Valve 2 forcing it downward and closing the Exhaust Vent 3 A...

Page 20: ...he position illustrated The lower surface of the Piston 4 contacts the Piston Bumper 9 and prevents air leakage If the upper surface of the Piston Bumper 9 is damaged some air will leak As there is no o ring installed here a very small amount of air will leak from the slight clearance between the components If the operator s grip is loosened air will leak ...

Page 21: ... remaining air pressure at the lower end of the piston is discharged through the clearance between the Piston Bumper 9 and the Driver Blade 7 When the air pressure at the upper side of the piston lowers the air pressure within the Return Air Chamber 8 pushes the piston upward NOTE If the clearance were larger the piston would not return if it were smaller driving force would be decreased When the ...

Page 22: ...thod Remedy 1 Nails cannot be driven Check if the magazine is normally loaded with specified nails Check if the nail feeder operates smoothly in the magazine Check if the nails one strip move smoothly in the magazine Check if nails one strip are fed smoothly into the nail injection port of the nose Use specified nails Remove the abnormal nails and load the magazine with normal nails Magazine is lo...

Page 23: ...d or damaged Driver blade is abnormal deformed burrs damaged or fatigued Cylinder s internal surface is abnormal deposits of dirt or worn Control valve section Plunger A Plunger B or valve bushing is abnormal galled or damaged O ring is worn or oiling is needed Replace the defective part Apply grease or replace Nails are not fully fed into the injection port Unspecified nails are used Driver blade...

Page 24: ...s from the wood surface Operate the nailer without nails and check if the driver blade is projected from the nose tip Disassemble the output section and check the piston ring O ring and the inner outer surfaces of the cylinder for abnormal condition 4 Nails clog the mechanism Adjust for 5 to 8 5 kgf cm2 Do not use unspecified workpieces Replace the driver blade Replace the defective part O ring in...

Page 25: ... tip while cooling the ground area with water to prevent it from being excessively heated Excessive grinding will rapidly reduce the service life of the driver blade In such a case replace the driver blade Driver blade Concave 5 Grinding surface Fig 8 9 3 Possible Causes and Corrections of Air Leakage Air leakage repair location A B C G D E F ...

Page 26: ...k part Cause When trigger valve safety valve are OFF When trigger valve safety valve are ON Inspection priorities In the table below possible causes of air leakage and their repair procedures are marked in accordance with the likelihood of possible failure 1 First priority items are marked with an asterisk 2 Second priority items seal portions are marked with a double circle 3 Remaining items are ...

Page 27: ...the Body Ass y 25 or Cap 38 Air leak part Cause When trigger valve safety valve are OFF When trigger valve safety valve are ON When trigger valve ON safety valve OFF Cap G Scratched or damaged O ring 53 inside Valve Sleeve A 54 When single actuation is selected Safety valve continued F ...

Page 28: ...m when mounting 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 5 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 Use the conventional grip tape for repair of the Grip Rubber 36 be...

Page 29: ... to remove the Cylinder Plate 15 When this has been accomplished the Cylinder 17 and other parts which make up the output section can be removed as illustrated in Fig 11 If it is difficult to remove the Cylinder 17 remove the Nose 32 by referring para 10 2 3 procedures and push out the Cylinder 17 from the lower part of the main body b Reassembly Reassembly can be accomplished by following the dis...

Page 30: ...nd Gasket F 6 b Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse However special attention should be given to the following items Be sure to check that the Exhaust Valve 9 is orange and provided with a 1 mm dia hole Fig 13 before reassembly Note that mounting a wrong exhaust valve may cause a malfunction Gasket C 8 and Gasket F 6 should be replaced with ...

Page 31: ... 33 and pull out the entire magazine section backward Remove the four Nylock Hex Socket Hd Bolts M8 x 22 31 Then Piston Bumper B 27 and Gasket A 28 can be removed together with the Nose 32 and Pushing Lever 45 Fig 14 b Reassembly Disassembly procedures should be followed in the reverse order Note the following points Plunger B Spring 58 Plunger B 59 and Washer M5 57 are apt to be removed during di...

Page 32: ... x 22 31 Magazine 78 Guard 30 Gasket A 28 Piston Bumper B 27 Nose 32 Nylock Bolt W Flange M8 x 16 33 Plunger B Spring 58 Roll Pin D3 x 45 43 Body Ass y 25 Nail Feeder Ass y 75 Insert a bar such as a screwdriver into this hole Fig 15 Pushing Lever 45 Plunger B 59 Guard B 42 ...

Page 33: ... strongly on the Valve Bushing 49 to remove the Valve Bushing 49 Valve Sleeve A 54 Plunger A 48 and the Plunger Spring 46 Remove the Plunger O ring 56 inside the Valve Bushing 49 and the two O rings P 9 53 inside Valve Sleeve A 54 by means of a setting pin with a rounded tip Fig 17 10 3 Disassembly and Reassembly of the Control Valve Section Tools required Roll pin puller 3 mm 0 118 dia Flat blade...

Page 34: ...ng 49 from being damaged when inserted into the body carefully apply grease to the body hole and the outer circumference of the O rings prior to assembly If damaged O rings are mounted a malfunction may occur Be careful when handling them The O ring inside the Valve Bushing 49 is small and hard to mount a little Be careful not to lose the O ring when handling Mount the Valve Bushing 49 again facin...

Page 35: ...embly procedures should be followed in the reverse order Note the following points Be careful of the mounting direction of the Nose Rubber 67 Mount the Nose Rubber 67 aligning with the shape of the Nose 32 Hook the Spring 44 in the 3 mm dia hole of the Nose 32 aligning with the shape of the Pushing Lever 45 The Nose 32 has two 3 mm dia holes one is for hooking the Spring 44 and the other is for th...

Page 36: ... the reverse order Note the following points Insert the Nail Rail 68 from the rear of the Magazine 78 and press fit the Nail Rail 68 into the Magazine 78 by tapping with a wooden hammer so that the protrusion of the Nail Rail 68 becomes flush with the rear end of the Magazine 78 Hook the hook of the Ribbon Spring 76 on the Magazine 78 then mount the Nail Feeder Ass y 75 to the Magazine 78 Slide th...

Page 37: ...il Feeder B 73 and Feeder Spring 74 can be removed b Reassembly Disassembly procedures should be followed in the reverse order Note the following points Insert the Roll Pin D4 x 40 72 into Nail Feeder B 73 Insert the Feeder Spring 74 into the hole of the Nail Feeder B 73 and compress the Feeder Spring 74 until it is engaged with the protrusion of Nail Feeder A 71 Nail Feeder Ass y 74 75 72 73 71 R...

Page 38: ...r wrench 4 mm a Disassembly Remove the three Hex Socket Hd Bolts M5 x 18 39 the Cap 38 and Gasket D 37 can be removed b Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse Hex Socket Hd Bolt M5 x 18 39 Body Ass y 25 Gasket D 37 Cap 38 Fig 22 ...

Page 39: ...perate just by pulling the Trigger 51 Check that the Model NR 83AA3 does not operate just by pressing the Pushing Lever 45 against a test piece wood etc Check that the Model NR 83AA3 operates by pulling the Trigger 51 first then pressing the Pushing Lever 45 against a test piece at this time pull the Nail Feeder Ass y 75 backward see Fig 15 4 Set Valve Sleeve A 54 to single actuation single sequen...

Page 40: ...30 40 Fixed Variable NR 83AA3 Work Flow Exhaust Cover Exhaust Piece Exhaust Valve Head Cap and Gasket Set Gasket x 4 60 min 50 Nose Magazine Nail Rail Nail Feeder Ass y Ribbon Spring Pushing Lever Spring Guard B General Assembly Adjustment Cylinder Body Valve Cylinder Cylinder Plate Cylinder Ring Cylinder Spring Cylinder Guide Cylinder O ring x 3 O ring x 3 Body Ass y Piston Bumper B Cylinder O ri...

Page 41: ...PNEUMATIC TOOL PARTS LIST LIST NO E009 STRIP NAILER Model NR 83AA3 2003 7 18 E1 Hitachi Power Tools ...

Page 42: ...CYLINDER SPRING 1 21 877 322 BASE WASHER 1 22 877 310 CYLINDER GUIDE 1 23 877 327 GASKET G 1 24 884 070 WARNING LABEL 1 25 883 506 BODY ASS Y 1 INCLUD 36 26 877 315 CYLINDER O RING I D 63 9 1 27 883 511 PISTON BUMPER B 1 28 877 334 GASKET A 1 29 882 974 NYLOCK BOLT W FLANGE M6X12 1 30 883 493 GUARD 1 31 883 492 NYLOCK HEX SOCKET HD BOLT M8X22 4 32 883 490 NOSE 1 33 883 505 NYLOCK BOLT W FLANGE M8X...

Page 43: ...4 1 62 875 638 O RING S 12 1 63 875 644 VALVE PLATE 1 64 877 335 TRIGGER VALVE BUSHING 1 65 878 121 TRIGGER PLUNGER 1 66 874 820 PLUNGER O RING 1 67 883 491 NOSE RUBBER 1 68 883 496 NAIL RAIL 1 69 883 499 SLEEVE 1 70 883 497 MAGAZINE COVER 1 71 883 502 NAIL FEEDER A 1 72 949 688 ROLL PIN D4X40 10 PCS 1 73 883 501 NAIL FEEDER B 1 74 883 441 FEEDER SPRING 1 75 883 500 NAIL FEEDER ASS Y 1 INCLUD 71 7...

Page 44: ... 501 872 422 HEX BAR WRENCH 6MM 1 502 944 459 HEX BAR WRENCH 5MM 1 503 944 458 HEX BAR WRENCH 4MM 1 504 875 769 EYE PROTECTOR 1 505 884 072 CAUTION TAG 1 506 884 120 LEAFLET 1 601 877 153 PNEUMATIC TOOL LUBRICANT 30CC 1 602 874 042 PNEUMATIC TOOL LUBRICANT 120CC 1 603 876 212 PNEUMATIC TOOL LUBRICANT 1L 1 604 317 918 GREASE ATTOLUB NO 2 500G 1 605 881 768 GRIP TAPE A 1 606 880 407 TAPE 1 ...

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