Hitachi NR 83AA2 Technical Data And Service Manual
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Hitachi NR 83AA2 Technical Data And Service Manual

Strip nailer
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MODEL
NR 83AA2
POWER TOOLS
TECHNICAL DATA
STRIP NAILER
AND
NR 83AA2
SERVICE MANUAL
N
LIST No. E001
May 2001
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

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Summary of Contents for Hitachi NR 83AA2

  • Page 1 MODEL NR 83AA2 POWER TOOLS TECHNICAL DATA STRIP NAILER NR 83AA2 SERVICE MANUAL LIST No. E001 May 2001 SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT...
  • Page 2 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 FP650 SENCO PASLODE P350S...

  • Page 3: Table Of Contents

    10-3. Disassembly and Reassembly of the Control Valve Section ............25 10-4. Disassembly and Reassembly of the Driving Section and the Magazine Section ...... 26 11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY ..........28 12. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............29 Assembly Diagram for NR 83AA2...

  • Page 4: Product Name

    To cope with this problem, a band-type grip rubber is adopted to the Model NR 83AA2. (4) In the Model NR 83AA2, the magazine section is simplified and no washer is used to reduce parts count for easy maintenance.

  • Page 5: Specifications

    5. SPECIFICATIONS 5-1. Specifications NR 83AA2 Model Driving system Reciprocating piston type 5 -- - 8.5 kgf/cm (70 -- - 120 psi, 4.9 -- - 8.3 bar) (Gauge pressure) Operating pressure Driving speed 3 pcs./sec. Weight 3.8 kg (8.4 lbs.)

  • Page 6: Nail Selection

    NR 83AA2. CAUTION: Ensure that nails are as specified in Fig. 1. The Model NR 83AA2 utilizes D-head (clipped head) nails collated at an angle of 34 degrees which are the same as the nails utilized by a competitor's model Paslode. However, some D-head nails made by other makers are collated at a different angle of 26 degrees.

  • Page 7: Nail Driving Force

    For example, when driving a nail 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 83AA2, a pressure of about 7.0 bar (7.1 kgf/cm , 102 psi) allows the nailer to drive the nail flush with the wood surface.

  • Page 8: Optional Accessories

    (1) Sequential trip mechanism kit (Single shot) (Code No. 876762) A sequential trip mechanism kit is provided as an optional accessory for the Model NR 83AA2. By using this optional accessory, a nail is driven by 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.

  • Page 9: Comparisons With Similar Products

    --- 6 ---...

  • Page 10: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NR 83AA2 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.

  • Page 11: Related Laws And Regulations

    The following label is adhered to the Model NR 83AA2 for Europe to prohibit the use of the Model NR 83AA2 standing on a stepladder. Carefully ensure that customers fully understand and follow the precaution before using the tool. 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.

  • Page 12: Mechanism And Operation Principle

    8. MECHANISM AND OPERATION PRINCIPLE 8-1. Mechanism As illustrated in Fig. 4, the Model NR 83AA2 can be generally divided into four sections: output section, control valve section, driving section and magazine section. The driving section (nose and piston) and the magazine section have been newly designed though its basic construction is the same as that of the Model NR 83AA (valve section is common to the Model NR 83AA).
  • Page 13 The <Bold> numbers in the figure below correspond to the numbers in "8-3. Operation Principle". Exhaust Valve < 2 > Exhaust cover Exhaust Vent < 3 > Exhaust piece Piston < 4 > Accumulator < 1 > Safety valve portion Control valve section Trigger valve portion...

  • Page 14: Interchangeability

    The driving section and the magazine section are not interchangeable between the Model NR 83AA2 and the NR 83AA because these sections of the Model NR 83AA2 have been newly designed. The output section and the control valve section are interchangeable except the following parts.

  • Page 15: Operation Principle

    8-3. Operation Principle The operation of the Model NR 83AA2 is illustrated and described in Fig. 5 through 8. The circled numbers in the descriptions correspond to the item numbers shown in the mechanism illustrated in Fig. 4. In Fig. 6 and Fig. 8, read the descriptions in alphabetical order.
  • Page 16 Compressed air is applied Although air pressure is applied to both the to the upper side of the upper and lower sides of the cylinder, the Exhaust Valve < 2 >, forcing cylinder is forced downward due to the larger it downward and closing Cylinder ring effective area of the upper side.
  • Page 17 Air pressure is applied in the shaded areas in the illustration, and each component is held in the position illustrated. If the operator's grip is loosened, air will leak. At there is no o-ring installed here, a very small amount of air will leak from the slight clearance between the components.
  • Page 18 The air pressure on the upper surface of the Exhaust Valve < 2 > is released, and the exhaust valve is pushed upward by the air pressure within the cylinder. This opens the Exhaust Vent < 3 >, and the air pressure in the cylinder is discharged from the nailer.

  • Page 19: Troubleshooting Guide

    9. TROUBLESHOOTING GUIDE 9-1. Troubleshooting and Correction Possible cause Problem Inspection method Remedy : most-common cause) 1) Nails cannot <Nails> be driven. The magazine is not loaded Check if the magazine is Use specified nails. with specified genuine nails. normally loaded with specified nails.
  • Page 20 Possible cause Problem Inspection method Remedy : most-common cause) See item 1). See item 1). Nails are not fully fed into 2) Nails bent the injection port. while being driven. See item 1). See item 1). Unspecified nails used. Replace the part. Check if the driver blade tip Driver blade worn.

  • Page 21: Regrinding The Driver Blade

    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 reduce the service life of the driver blade.
  • Page 22 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 marked with a single circle ( ).

  • Page 23: Disassembly 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.

  • Page 24: Disassembly And Reassembly Of The Output Section

    10-2. Disassembly and Reassembly of the Output Section (1) Piston [12], Cylinder [17] and related parts Tool required: Hexagon bar wrench (5 mm) (a) Disassembly (See Figs. 10, 11 and 12.) Remove the four Hex. Socket Hd. Bolts (W/SP. Washer) M6 x 25 [3], and take off the Exhaust Cover [4]. The Piston [12] can then be taken out.
  • Page 25 Exhaust Piece [7] Gasket (C) [8] and Gasket (F) [6] should be replaced Gasket (C) [8] with new genuine Hitachi parts. Exhaust Valve [9] Apply the designated grease to the outer circumference Head Cap and of the Exhaust Valve [9] prior to reassembly.
  • Page 26 (3) Piston Bumper (B) [28], Gasket (A) [29] and related parts (See Figs. 14 and 15.) Tools required Hexagon bar wrench (5 mm, 6 mm) Roll pin puller (3 mm (0.118") dia.) Screwdriver (a) Disassembly Pull out the Roll Pin D3 x 30 [43] and remove the Nylock Bolt (W/Flange) M6 x 12 [30] to remove the Guard [31].
  • Page 27 Nail Feeder Ass'y [69] Insert a bar such as a screwdriver into this hole. Fig. 15 --- 24 ---...

  • Page 28: Disassembly And Reassembly Of The Control Valve Section

    10-3. Disassembly and Reassembly of the Control Valve Section Tools required: Roll pin puller (3 mm (0.118") dia.) Minus-hd. screwdriver (a) Disassembly (See Fig. 16.) Remove the Magazine [72] as described in section 10-2-(3). Remove the Pushing Lever [46] as described in section 10-2-(3). With the roll pin puller (3 mm (0.118") dia.), take out the Roll Pin D3 x 30 [43], and remove the Trigger [53], Trigger Plunger [59] and Plunger (B) [54].

  • Page 29: Disassembly And Reassembly Of The Driving Section And The Magazine Section

    10-4. Disassembly and Reassembly of the Driving Section and the Magazine Section (1) Nose [33], Pushing Lever [46] and the related parts (See Fig. 18.) Tool required Hexagon bar wrench (5 mm) (a) Disassembly Perform disassembly according to 10-2-(3) to remove the Nose [33], Pushing Lever [46], and the other parts.
  • Page 30 (2) Magazine [72], Nail Feeder Ass'y [69] and the related parts (See Fig. 19.) Tool required Hexagon bar wrench (5 mm ) (a) Disassembly Perform disassembly according to 10-2-(3) to remove the entire magazine section. Remove a screwdriver or a rod from the the stopper hole for the Nail Feeder Ass'y [69]. Then the Nail Feeder Ass'y [69], Ribbon Spring [70] and Needle Roller D4 x 20 [71] can be removed from the front of the Magazine [72].

  • Page 31: Inspection And Confirmation After Reassembly

    (3) Nail Feeders (A) [65], (B) [67] and the related parts (See Fig. 20.) Tool required Roll pin puller (4 mm (0.157") dia.) (a) Disassembly Fix the Nail Feeder Ass'y [69] using a V-block and pull out the Roll Pin D4 x 40 [66] from the top using a roll pin puller (4 mm (0.157") dia.).

  • Page 32: Standard Repair Time (Unit) Schedules

    12. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow NR 83AA2 Tail Cover Top Cover Magazine Exhaust Cover Magazine Gasket x 3 Cover Exhaust Piece Ribbon Spring Exhaust Valve Nail Feeder Head Cap and Ass'y Gasket Set...
  • Page 33 E001 LIST NO. PNEUMATIC TOOL PARTS LIST STRIP NAILER 2001 • • Model NR 83AA2 (E1) 506 507 67 68...
  • Page 34 PARTS NR 83AA2 ITEM CODE NO. DESCRIPTION REMARKS USED 883-509 HEX. SOCKET HD. BOLT (W/FLANGE) M6X45 877-330 TOP COVER 883-507 HEX. SOCKET HD. BOLT (W/SP.WASHER) M6X25 877-324 EXHAUST COVER 877-325 GASKET (B) 877-329 GASKET (F) 877-328 EXHAUST PIECE 877-854 GASKET (C)
  • Page 35 PARTS NR 83AA2 ITEM CODE NO. DESCRIPTION REMARKS USED 877-337 VALVE BUSHING FOR TPE,FRA,USA,CAN 875-638 O-RING (S-12) 876-203 TRIGGER 877-339 PLUNGER (B) FOR TPE,FRA,USA,CAN 878-734 VALVE PACKING 875-645 URETHANE BALL (C) D7.14 875-644 VALVE PLATE 877-335 TRIGGER VALVE BUSHING 878-121...

  • Page 36: Standard Accessories

    STANDARD ACCESSORIES NR 83AA2 ITEM CODE NO. DESCRIPTION REMARKS USED 872-422 HEX. BAR WRENCH 6MM 944-459 HEX. BAR WRENCH 5MM 944-458 HEX. BAR WRENCH 4MM 875-769 EYE PROTECTOR 877-153 PNEUMATIC TOOL LUBRICANT (30CC) FOR FRA 882-413 CAUTION TAG FOR USA,CAN...

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