Hitachi NR 83AA3 Technical Data And Service Manual
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Hitachi NR 83AA3 Technical Data And Service Manual

Hitachi NR 83AA3 Technical Data And Service Manual

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

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Summary of Contents for Hitachi NR 83AA3

  • Page 1 MODEL NR 83AA3 Hitachi Power Tools TECHNICAL DATA STRIP NAILER NR 83AA3 SERVICE MANUAL LIST No. E009 Jul. 2003 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 F350S...

  • Page 3: Table Of Contents

    10-3. Disassembly and Reassembly of the Control Valve Section ............30 10-4. Disassembly and Reassembly of the Driving Section, the Cap and the Magazine Section ..32 11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY ..........36 12. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............37 Assembly Diagram for NR 83AA3...

  • Page 4: Product Name

    2. MARKETING OBJECTIVE The new Model NR 83AA3 strip nailer is a minor-changed version of the current Model NR 83AA2. Owing to the modification of the ANSI standard, the current Model NR 83AA2 has gone out of production since the 1st of May 2003.

  • Page 5: Specifications

    5. SPECIFICATIONS 5-1. Specifications NR 83AA3 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: Explanation Of The Nailing Operation

    5-2. Explanation of the Nailing Operation To meet the requirements of "ANSI SNT-101-2002", the Model NR 83AA3 is equipped with a nailing operation switching device as shown in the figures below. Use SINGLE ACTUATION MECHANISM (SINGLE SEQUENTIAL ACTUATION MECHANISM) or CONTACT ACTUATION MECHANISM in accordance with the work to be performed.

  • Page 7: Nail Selection

    NR 83AA2. CAUTION: Ensure that nails are as specified in Fig. 1. The Model NR 83AA3 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 8: 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 83AA3, 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 9: Optional Accessories

    A full sequential actuation mechanism kit (sequential trip mechanism kit) is provided as an optional accessory for the Model NR 83AA3. 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 10: Comparisons With Similar Products

    --- 7 ---...

  • Page 11: Precautions In Sales Promotion

    7. PRECAUTIONS IN SALES PROMOTION In the interest of promoting the safest and most efficient use of the Model NR 83AA3 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 12: Related Laws And Regulations

    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.

  • Page 13: Mechanism And Operation Principle

    The basic construction of the Model NR 83AA3 is the same as that of the Model NR 83AA2. The magazine section is common to that of the Model NR 83AA2. However, most of the parts of the control valve section were newly designed to provide the single actuation (single sequential actuation)/contact actuation mechanisms in order to correspond to the modification of the ANSI standard.
  • Page 14 The <Bold> numbers in the figure below correspond to the numbers in "8-3. Operation Principle". Safety valve portion Trigger valve portion Trigger Switching device (Valve sleeve (A)) Valve bushing Plunger (B) Exhaust Valve < 2 > Control valve section Exhaust cover Exhaust Vent <...

  • Page 15: Interchangeability

    Model NR 83AA2 are described in detail. (1) Output section Be careful not to make mistakes in mounting the following parts that were changed for the Model NR 83AA3 because these parts are similar to those of the Model NR 83AA2 but not interchangeable.
  • Page 16 (3) Control valve section Be careful not to make mistakes in mounting the following parts that were changed for the Model NR 83AA3 because these parts are similar to those of the Model NR 83AA2 but not interchangeable. Part NR 83AA3...
  • Page 17 Parts that were changed for the Model NR 83AA3 and not interchangeable with the Model NR 83AA2 (except the parts described in Part NR 83AA3 NR 83AA2 Caution Valve Bushing [49] These parts were newly designed to provide the single actuation (single sequential actuation)/contact actuation selector.

  • Page 18: Operation Principle

    8-3. Operation Principle The operation of the Model NR 83AA3 is illustrated and described in Fig. 4 through 7. The circled numbers in the descriptions correspond to the item numbers shown in the mechanism illustrated in Fig. 3. In Fig. 5 and Fig. 7, read the descriptions in alphabetical order.
  • Page 19 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 20 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. As there is no o-ring installed here, a very small amount of air will leak from the slight clearance between the components.
  • Page 21 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 22: Troubleshooting Guide

    9. TROUBLESHOOTING GUIDE 9-1. Troubleshooting and Correction Problem Possible cause Inspection method Remedy 1) Nails cannot <Nails> be driven. Use specified nails. Magazine is not loaded with Check if the magazine is Remove the abnormal nails specified genuine nails. normally loaded with and load the magazine with specified nails.
  • Page 23 Problem Remedy Possible cause Inspection method <Output section> Adjust for 5 to 8.5 kgf/cm Set the single actuation/ Air pressure is too low. Replace the piston ring. contact actuation selector to the contact actuation. Piston O-ring is worn or Pull the nail feeder damaged.
  • Page 24 Problem Inspection method Remedy Possible cause 3) Head of a nail Air pressure is too low. Drive a nail into soft wood Adjust for 5 to 8.5 kgf/cm driven into a Workpiece is very hard. workpiece and check if the Do not use unspecified workpiece head protrudes from the...

  • Page 25: Regrinding The Driver Blade

    9-2. Regrinding the Driver Blade The tip of the driver blade should be ground as shown in Fig. 8. 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 26 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 27 Cause Air leak part When trigger valve ON/ When trigger valve/ When trigger valve/safety valve are OFF safety valve are ON safety valve OFF Scratched or damaged O-ring [53] inside Valve Safety valve Sleeve (A) [54] (When (continued) single actuation is selected) Loose Hex.

  • Page 28: Disassembly And Reassembly

    (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.

  • Page 29: 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: Hexagonal bar wrench (5 mm) (a) Disassembly (See Figs. 9, 10 and 11.) 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 30 Head Cap and Gasket Set [10] Gasket (C) [8] and Gasket (F) [6] should be replaced with new genuine Hitachi parts. Fig. 12 Disassembly of main body, upper part Apply the designated grease to the outer circumference of the Exhaust Valve [9] prior to reassembly.
  • Page 31 Exhaust Valve [9] 1 mm dia. hole Cross-sectional view Fig. 13 (3) Piston Bumper (B) [27], Gasket (A) [28] and related parts (See Figs. 14 and 15.) Tools required Hexagonal bar wrench (5 mm, 6 mm) Roll pin puller (3 mm (0.118") dia.) Screwdriver (a) Disassembly Pull out the Roll Pin D3 x 45 [43] to remove Guard (B) [42].
  • Page 32 Guard (B) [42] Roll Pin D3 x 45 [43] Body Ass'y [25] Plunger (B) Spring [58] Plunger (B) [59] Nylock Bolt (W/Flange) Piston Bumper (B) [27] M8 x 16 [33] Gasket (A) [28] Nylock Bolt (W/Flange) M6 x 12 [29] Guard [30] Nylock Hex.

  • Page 33: 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.) Flat-blade screwdriver Setting pin (with a rounded tip) (a) Disassembly (See Fig. 16.) Remove the Magazine [78] as described in section 10-2-(3). Remove the Pushing Lever [45] as described in section 10-2-(3).
  • Page 34 (b) Reassembly Reassembly can be accomplished by following the disassembly procedures in reverse. However, special attention should be given to the following items. Plunger Spring [46] and Plunger (B) Spring [58] are small and apt to be twisted and lost. Be careful when handling them.

  • Page 35: Disassembly And Reassembly Of The Driving Section, The Cap And The Magazine Section

    10-4. Disassembly and Reassembly of the Driving Section, the Cap and the Magazine Section (1) Nose [32], Pushing Lever [45] and the related parts (See Fig. 19.) Tool required Hexagonal bar wrench (5 mm) (a) Disassembly Perform disassembly according to 10-2-(3) to remove the Nose [32], Pushing Lever [45] and the other parts.
  • Page 36 (2) Magazine [78], Nail Feeder Ass'y [75] and the related parts (See Fig. 20.) Tool required Hexagonal 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 stopper hole for the Nail Feeder Ass'y [75]. Then the Nail Feeder Ass'y [75], Ribbon Spring [76] and Needle Roller D4 x 20 [77] can be removed from the front of the Magazine [78].
  • Page 37 (3) Nail Feeders (A) [71], (B) [73] and the related parts (See Fig. 21.) Tool required Roll pin puller (4 mm (0.157") dia.) (a) Disassembly Fix the Nail Feeder Ass'y [75] using a V-block and pull out the Roll Pin D4 x 40 [72] from the top using a roll pin puller (4 mm (0.157") dia.).
  • Page 38 (4) Disassembly and reassembly of the cap (See Fig. 22.) Tool required Hexagonal bar wrench (4 mm) Cap [38] Gasket (D) [37] Hex. Socket Hd. Bolt M5 x 18 [39] Body Ass'y [25] Fig. 22 (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.

  • Page 39: Inspection And Confirmation After Reassembly

    Feeder Ass'y [75] moves smoothly in the Magazine [78]. (2) Connect the Model NR 83AA3 to an air compressor and set Valve Sleeve (A) [54] to "single actuation (single sequential actuation)" (see 5-2). Check the following when the pressure is 4.5 kgf/cm (63 psi) and 8.5 kgf/cm (120 psi).

  • Page 40: Standard Repair Time (Unit) Schedules

    12. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow NR 83AA3 Exhaust Cover Exhaust Piece Nose Exhaust Valve Magazine Head Cap and Nail Rail Gasket Set Nail Feeder Gasket x 4 Ass'y Ribbon Spring General Assembly...
  • Page 42 PARTS NR 83AA3 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 43 PARTS NR 83AA3 ITEM CODE NO. DESCRIPTION REMARKS USED 949-866 ROLL PIN D3X30 (10 PCS.) 872-645 O-RING (P-9) 884-116 VALVE SLEEVE (A) 876-316 O-RING (S-7) 878-723 PLUNGER O-RING 949-424 WASHER M5 (10 PCS.) 884-115 PLUNGER (B) SPRING 884-114 PLUNGER (B)

  • Page 44: Standard Accessories

    STANDARD ACCESSORIES NR 83AA3 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 884-072 CAUTION TAG 884-120 LEAFLET OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS...

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