1. Manuals
  2. Brands
  3. Hitachi Manuals
  4. Nail Gun
  5. NT 65MA2
  6. Technical data and service manual

Hitachi NT 65MA2 Technical Data And Service Manual

Hide thumbs Also See for NT 65MA2:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Instruction Manual
MODEL
NT 65MA2
Hitachi
Power Tools
TECHNICAL DATA
FINISH NAILER
AND
NT 65MA2
SERVICE MANUAL
N
LIST No. E011
Aug. 2003
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Advertisement

Table of Contents
loading

Related Manuals for Hitachi NT 65MA2

Summary of Contents for Hitachi NT 65MA2

  • Page 1 MODEL NT 65MA2 Hitachi Power Tools TECHNICAL DATA FINISH NAILER NT 65MA2 SERVICE MANUAL LIST No. E011 Aug. 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 Model Name Company Name DA250B PORTER CABLE BOSTITCH N62FN SFN40...

  • Page 3: Table Of Contents

    10-4. Disassembly and Reassembly of the Driving Section ............... 27 10-5. Disassembly and Reassembly of the Cap and the Magazine Section ........28 11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY ..........30 12. STANDARD REPAIR TIME (UNIT) SCHEDULES ..............31 Assembly Diagram for NT 65MA2...

  • Page 4: Product Name

    Hitachi 2-1/2" Finish Nailer, Model NT 65MA2 2. MARKETING OBJECTIVE The new Model NT 65MA2 finish nailer is a minor-changed version of the current Model NT 65MA. Owing to the modification of the ANSI standard, the valve construction was changed. In addition, the head valve construction was simplified and the O-ring was adopted for sliding the piston to respond to market prices of finish nailers in the U.S.A.

  • Page 5: Specifications

    5. SPECIFICATIONS 5-1. Specifications Model NT 65MA2 Driving system Reciprocating piston type Operating pressure 4.9 --- 8.3 bar (5 -- - 8.5 kgf/cm , 70 -- - 120 psi) (Gauge pressure) 3 pcs./sec Driving speed Weight 2.0 kg (4.4 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 NT 65MA2 is equipped with a nailing operation switching device at the valve section 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

    5-3. Nail Selection The Model NT 65MA2 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.

  • Page 8: Nail Driving Force

    A full sequential actuation mechanism kit (sequential trip mechanism kit) is provided as an optional accessory for the Model NT 65MA2. By using this optional accessory, a nail is driven by pressing the pushing 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 pushing 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 NT 65MA2 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

    8. MECHANISM AND OPERATION PRINCIPLE 8-1. Mechanism As illustrated in Fig. 4, the Model NT 65MA2 can be generally divided 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.
  • Page 12 Blow nozzle section Control valve section Valve Piston (B) [63] O-Ring (S-10) [21] Valve Bushing (B) [59] O-Ring (1AP-3) [19] O-Ring (S3) [20] Valve Packing [16] Accumulator Plunger Spring [65] Spring [17] Valve Bushing (A) [68] Valve Bushing [22] Plunger (A) [66] Plunger [18] Switching Device (Change Knob [55])

  • Page 13: Interchangeability

    8-2. Interchangeability Interchangeability of the parts between the Model NT 65MA2 and the Model NT 65MA is described below. Both the parts that are not interchangeable and the parts that are interchangeable though their code numbers are different are described in detail.
  • Page 14 NT 65MA2 Parts NT 65MA Plunger [18] Newly designed 30.2 Valve Bushing [22] Newly designed 20.4 24.7 Newly designed Body Ass'y [29] Grip rubber Grip tape Mark of switcning Common to the Model NR 90AC3 Trigger (A) [52] 7.6 mm (.299") dia. hole 7 mm (.276") dia.
  • Page 15 NT 65MA2 Parts NT 65MA Valve Piston (B) [63] Common to the Model NR 90AC3 Be careful not to make mistakes in mounting Valve Piston (B) [63] because it is similar to that of the Models NR 90AC3 and NR 65AK.

  • Page 16: Operation Principle

    8-3. Operation Principle Exhaust Cover [5] (1) Before nailing: (Fig. 5 and Fig. 6) Head valve chamber Exhaust vent 1) When compressed air is fed to the main body, it fills Air passage Head Valve the Accumulator ( Spring [8] Control valve 2) At the same time, the compressed air flows into the section...
  • Page 17 (3) During return: (Fig. 7 and Fig. 8) Exhaust Cover [5] Head valve chamber 1) When either Pushing Lever (A) [41] or Trigger (A) Exhaust vent [52] is released, Plunger (A) [66] goes down and the Air passage Head compressed air in the accumulator flows into the Valve (A) [10] Control valve section...
  • Page 18 (4) Single actuation mechanism/contact actuation mechanism: (Fig. 9 and Fig. 10) Single/contact actuation mechanism changeover is accomplished by turning the switching device (Change Knob [55]). Accumulator Single actuation mechanism (Switching device: upward position): 1) Immediately after driving the first nail, the control valve should be as shown in Fig.

  • Page 19: Troubleshooting Guide

    9. TROUBLESHOOTING GUIDE 9-1. Troubleshooting and Correction Possible cause Problem Inspection method Remedy ( : most-common cause) <Nails> 1) Nails cannot be driven. Use specified nails. Magazine is not loaded with Check that the magazine is specified genuine nails. correctly loaded with specified nails.
  • Page 20 Possible cause Problem Inspection method Remedy ( : most-common cause) Perform idle driving to Replace the part. Head valve (A) sliding 1) Nails cannot Apply grease. surface is abnormal (seized check the driving operation. be driven. or damaged, or lubrication is (continued) needed.) Head valve spring is...

  • Page 21: Regrinding The Driver Blade

    Possible cause Problem Inspection method Remedy ( : most-common cause) < Driver blade is not returned Perform idle or actual See item "1) Output section: 4) Nails jam. driving to check if the driver piston, driver blade, etc." completely > (continued) blade is returned See item "1) Output section:...

  • Page 22: Possible Causes And Correction Of Air Leakage

    9-3. Possible Causes and Correction of Air Leakage Air leakage repair location 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.
  • Page 23 Possible cause Air leakage point With control valve OFF With control valve ON The Cylinder O-Ring (I.D 63.1) [12] is The Piston Bumper [25] is abnormal (C) Blade guide abnormal (broken or damaged). ( d or e portion is damaged, The seal surface of the Body Ass'y deformed or cracked).

  • Page 24: Disassembly And Reassembly

    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.

  • Page 25: Disassembly And Reassembly Of The Output Section

    10-2. Disassembly and Reassembly of the Output Section (1) Disassembly and reassembly of the Exhaust Cover [5], Head Valve (A) [10], Cylinder [11], Piston [15], Piston Bumper [25], etc. (See Fig. 12.) [Tool required] Hex. Socket Hd. Bolt M6 x 12 [1] Hex.
  • Page 26 (b) Reassembly Groove of the Disassembly procedures should be followed in Exhaust Cover [5] O-ring (P-22) [9] the reverse order. Note the following points: Apply grease to the inside of the Cylinder [11], O-ring (I.D 34.7) [14] and the Cylinder O-ring (I.D 63.1) [12] before reassembly.

  • Page 27: Disassembly And Reassembly Of The Control Valve Section

    10-3. Disassembly and Reassembly of the Control Valve Section (See Fig. 15.) Retaining Ring (E-type) [Tools required] for D6 Shaft [27] Flat-blade screwdriver Roll pin puller (3 mm (.118") dia.) Roll Pin D3 x 28 [51] Hex. bar wrench (4 mm) Trigger (A) [52] Carefully disassemble so as Steel Ball D3.97 [53]...
  • Page 28 Pull out the Roll Pin D3 x 28 [51] with the roll pin puller (3 mm (.118") dia.), and take out the control valve in the following manner. Push 1) Remove the Exhaust Cover [5] by following the 4 to 5 mm (.157" to .197") dia. bar procedure in (1), section 10-2.
  • Page 29 (b) Reassembly Disassembly procedures should be followed in the reverse order. Note the following points: Be extremely careful to prevent the entry of foreign particles into the control valve section. Thoroughly apply grease to the O-Ring (I.D 1.8) [67] on Plunger (A) [66], O-Rings (S-4) [62], (I.D 8.8) [61] and (I.D 11) [64] on Valve Piston (B) [63], and the shaft of Plunger (A) [66] as shown in Fig.

  • Page 30: Disassembly And Reassembly Of The Driving Section

    10-4. Disassembly and Reassembly of the Driving Section (See Fig. 20.) Nylon Nut M5 [43] Sleeve [44] Hex. Socket Hd. Bolt (W/Flange) M5 x 20 [76] Body Ass’y [29] Roll Pin D3 x 28 [51] Blade Guide [38] [Tools required] Pushing Lever Hex.

  • Page 31: Disassembly And Reassembly Of The Cap And The Magazine Section

    Pull out the Roll Pin D4 x 14 [33] with the roll pin puller (4 mm (.157") dia.) so that Guide Plate (A) [32] and Guide Plate (B) [30] can be disassembled. Pull out the Roll Pin D3 x 20 [35] and the two Roll Pins D3 x 28 [51] with the roll pin puller (3 mm (.118") dia.) so that the Lock Lever [34] and Pushing Lever Guide [56] can be removed.
  • Page 32 Magazine Cover [70] so that there will be no space between the Magazine [81] and the Blade Guide [38]. Lubricate the Nail Rail [78] and the Ribbon Spring [71] with Hitachi pneumatic tool lubricant to smooth the movement of Nail Feeders (A) [74] and (B) [79].

  • Page 33: Inspection And Confirmation After Reassembly

    (120 psi). 1) Check that the Model NT 65MA2 does not operate just by pulling Trigger (A) [52] (i.e., check that the Piston [15] does not come out of the Blade Guide [38] tip (outlet of nails) when keeping Trigger (A) [52] pulled for five seconds or more).

  • Page 34: Standard Repair Time (Unit) Schedules

    12. STANDARD REPAIR TIME (UNIT) SCHEDULES Variable 60 min. MODEL Fixed Work Flow NT 65MA2 Top Cover Exhaust Cover Guide Plate (B) Gasket Guide Plate (A) Head Valve Plate Guide Spring Knob Magazine O-ring Plunger Magazine Cover Head Valve O-ring x 3...
  • Page 35 Hitachi Power Tools LIST NO. E011 PNEUMATIC TOOL PARTS LIST FINISH NAILER 2003 • • Model NT 65MA2 (E1)
  • Page 36 PARTS NT 65MA2 ITEM CODE NO. DESCRIPTION REMARKS USED 949-657 HEX. SOCKET HD. BOLT M6X12 (10 PCS.) 880-515 PLATE 884-332 TOP COVER 949-757 HEX. SOCKET HD. BOLT M5X20 (10 PCS.) 884-331 EXHAUST COVER 880-358 GASKET 882-914 HEAD BUMPER 882-913 HEAD VALVE SPRING...
  • Page 37 PARTS NT 65MA2 ITEM CODE NO. DESCRIPTION REMARKS USED 884-145 TRIGGER (A) 959-155 STEEL BALL D3.97 (10 PCS.) 982-454 SPRING (C) 884-335 CHANGE KNOB 884-336 PUSHING LEVER GUIDE NAME PLATE 877-699 HEAD VALVE O-RING (I.D 16.8) 878-881 VALVE BUSHING (B)
  • Page 38 NT 65MA2 STANDARD ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 944-458 HEX. BAR WRENCH 4MM 944-459 HEX. BAR WRENCH 5MM 875-769 SAFETY GLASSES 881-775 CASE 884-337 CAUTION TAG 884-120 LEAFLET OPTIONAL ACCESSORIES ITEM CODE NO. DESCRIPTION REMARKS USED 884-320 INCLUD. 602-606...

Table of Contents