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Hitachi NV 65HMC Service Manual And Technical Data

2-1/2 inch high pressure coil nailer
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PRODUCT NAME
Hitachi 2-1/2" High Pressure Coil Nailer
NV 65HMC
Model
MARKETING OBJECTIVE
The new Model NV 65HMC is a high-pressure type [2-1/2" (65 mm)] of coil nailer. High-pressure nailer series
products have already been introduced to the Japanese market and become popular nationwide. This new
product offers higher punching force about three times greater than that of conventional nailers, in order to
reduce its size and weight. The new Model NV 65HMC also features strong punching force, a nose switch
mechanism, blow nozzle, dual action trigger, and a tool-less adjuster. Please expand sales of the new Model
NV 65HMC Nailer.
APPLICATIONS
• Floor and wall framing
• Truss and window built-up
• Subflooring and roof decking
• Crate and pallet construction
SELLING POINTS
[NEW FEATURES]
Lightweight and Compact
Powerful
Nose switch mechanism
Blow nozzle
Dual action trigger
Tool-less adjuster
Easy nail loading
Lock mechanism of trigger
Low exhaust pressure
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
LIST No.
NV 65HMC: E062
Dec. 2009
International Sales Division
N
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Summary of Contents for Hitachi NV 65HMC

  • Page 1 Model MARKETING OBJECTIVE The new Model NV 65HMC is a high-pressure type [2-1/2" (65 mm)] of coil nailer. High-pressure nailer series products have already been introduced to the Japanese market and become popular nationwide. This new product offers higher punching force about three times greater than that of conventional nailers, in order to reduce its size and weight.
  • Page 2 REMARK: • For more information about HANDLING INSTRUCTIONS, visit our website at: http://www.hitachi-koki.com/manual_view_export/ • 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:...

  • Page 3: Table Of Contents

    1. Safety Instructions ----------------------------------------------------------------------------------------------- 8 TROUBLESHOOTING GUIDE -------------------------------------------------------------------------------------------- 10 1. Troubleshooting and Repair -------------------------------------------------------------------------------- 10 2. Possible Causes and Corrections of Air Leakage------------------------------------------------------ 15 REPAIR GUIDE---------------------------------------------------------------------------------------------------------------- 18 1. Precautions on Disassembly and Reassembly --------------------------------------------------------- 18 Assembly Diagram for NV 65HMC...

  • Page 4: Selling Points

    Powerful punching force about 1.3 times greater than that of our conventional NV 65AH Nailer. High pressure nailer Conventional nailer High pressure nailer Model NV 65HMC NV 65AH Weight 2.0 kg (4.4 lbs.) 2.1 kg (4.6 lbs.) 1.9 kg (4.3 lbs.) Height 28 5mm (11-1/4”)
  • Page 5 Dual action trigger This function automatically switches between "Single sequential actuation mode" and "Contact actuation mode" according to the operation sequence. This function can prevent unwanted double firing in "Single sequential actuation mode." Tool-less adjuster Rotating this adjuster adjusts the nailing depth (sink quantity of the nail head). Shallow Deep Adjuster...

  • Page 6: Specifications

    The air plug of the Model NV 65HMC is exclusively designed for high pressure and cannot be connected to any air hoses and compressors that are generally used at much lower air...

  • Page 7: Nail Selection

    2. Nail Selection The Model NV 65HMC utilizes common wire-collated and sheet-collated nail coils of 200 to 400 round-head nails. Applicable nail dimensions are shown below. However, genuine HITACHI nail coils should be used to assure satisfactory nailing quality. CAUTION: Ensure that nails are as specified in Fig. 1. Using other nails will cause nail jams and consequent nailer damage.
  • Page 8 Fig. 2 • Required nailing energy and nailer output energy Required nailing energy Nailer output energy (ft·lb) (kgf·cm) (ft·lb) (kgf·cm) 1200 1200 1000 1000 Hemlock Nail: d x L (mm x mm) (kgf/cm (psi) Air pressure setting to punch nail flush with NV 65HMC...

  • Page 9: Adjusting The Nailing Depth

    • Note that when you raise the Model NV 65HMC from the floor (after pressing the pushing lever against the floor) with the trigger pulled, single sequential actuation mode is automatically selected. Therefore, nails are not punched even when you press the pushing lever against the workpiece.

  • Page 10: Comparison With Similar Products

    COMPARISON WITH SIMILAR PRODUCTS 1. Comparison of Specifications (Superior specifications: HITACHI Maker Model NV 65HMC NV 65AH (High pressure nailer) Item (High pressure nailer) (Conventional nailer) 12 to 23 bar 4.9 to 8.3 bar 12 to 23 bar Operating pressure (12 to 23 kgf/cm (5 to 8.5 kgf/cm...

  • Page 11: Precautions On Sales Promotion

    1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model NV 65HMC Nailer by all of our customers, it is very important when concluding a sale that the salesperson carefully ensure that the buyer seriously recognizes the importance of the Instruction Manual, and fully understands the precautions listed on the Warning Label attached to each tool.
  • Page 12 (320 psi, 23 bar) or less. (2) If the dust in compressed air accumulates on the sliding portion, the Model NV 65HMC will not operate properly. Lubrication effectively removes dust and also prolongs the service life of the Model NV 65HMC in terms of maintaining good performance.

  • Page 13: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. Troubleshooting and Repair Possible cause Problem Inspection method Corrective action ( *: Most-common cause) Nails cannot • Magazine is not loaded • Check that the magazine • Use specified nails. be punched. with specified genuine is correctly loaded with •...
  • Page 14 Possible cause Problem Inspection method Corrective action ( *: Most-common cause) • Air leaks from the gap • Tighten screws and check Nails cannot between the body and the the O-rings. be punched. nose. (continued) • O-rings are worn or •...
  • Page 15 Possible cause Problem Inspection method Corrective action ( *: Most-common cause) • Cylinder inner surface is • Check that nails can be • Remove dust and then Nails cannot abnormal (packed with punched at 4.9 bar (5 lubricate. be punched. dust or worn).
  • Page 16 Possible cause Problem Inspection method Corrective action ( *: Most-common cause) *• Driver blade is worn. • Perform idle punching to • Replace the part. Nails cannot check whether the driver blade protrudes from the completely nose tip. punched *• Piston O-ring is abnormal •...
  • Page 17 Possible cause Problem Inspection method Corrective action ( *: Most-common cause) (continued) • Feeder is worn and the • Open the nail guide and • Replace abnormal parts. sliding section abnormal. check the position of the •...

  • Page 18: Possible Causes And Corrections Of Air Leakage

    2. Possible Causes and Corrections of Air Leakage 1. Air leakage repair location • Air leakage repair location Control valve section Magnified view of Z -15-...
  • Page 19 (3) Next, check the other possible parts. [Bold] numbers in the description below correspond to item numbers in the Parts List and exploded assembly diagram for the Model NV 65HMC. Possible causes Air leak point...
  • Page 20 Possible causes Air leak point Control valve OFF Control valve ON Control valve Defect on O-Ring (P7-U) [98] of Valve Defect on O-Ring (1AP-11) [90] and O- exhaust port Piston [89] (worn, cut or flaws) Ring (P9-U) [88] of Valve Piston [89] Defect on O-Ring (I.D 1.8) [92] of Plunger (worn, cut or flaws) [93] (worn, cut or flaws)

  • Page 21: Repair Guide

    The following describes the most essential precautions on disassembly and reassembly of the nailer. The NV 65HMC Coil Nailer mainly consists of six sections: output section, air duster valve section, control valve section, magazine section, nail feeder section and cap section.

  • Page 22: Disassembly And Reassembly Of The Output Section

    Disassembly and Reassembly of the Output Section 1. Disassembly and reassembly of the Exhaust Cover, Head Valve, Exhaust Rubber, [Tools required] • Hex. bar wrench (3 mm) • ø 3 mm rod (or ø 3 mm roll pin puller) Seal Lock Hex. Socket •...
  • Page 23 (2) Reassembly • Reassembly of Exhaust Cover, Head Valve, Conduct reassembly reversing Exhaust Rubber, etc disassembly procedure, but note the following: • Inject about 3 g of grease into the Head Valve Exhaust Rubber [13] [10] sliding part of the Exhaust Cover [7]. Head Valve [10] Exhaust Cover [7] •...
  • Page 24 Disassembly and Reassembly of the Air Duster Valve Section [Tools required] • Socket wrench (14 mm) • Flat-blade screwdriver Knob [24] Retaining Ring (E-Type) For D4 Shaft [25] Valve Bushing [26] (left-handed thread) O-Ring (S-10) [27] O-Ring (S3) [28] O-Ring (1AP-3) [29] Plunger [30] Plunger O-Ring [31] Spring [32]...

  • Page 25: Disassembly And Reassembly Of The Control Valve Section

    Disassembly and Reassembly of the Control Valve Section [Tools required] • Roll pin puller (ø 3, ø 2.5) • Flat-blade screwdriver O-Ring (S-14) [95] O-Ring (S-16) [96] Feeder Shaft Ring [36] Valve Bushing (B) [97] Roll Pin D3 x 28 [65] Body Ass’y [39] O-Ring (P7-U) [98] O-Ring (P9-U) [88]...
  • Page 26 (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: (a) Reassembly of the control valve section • Always keep the control valve section clean. • Fully apply grease to the O-Ring (S-16) [96], O-Ring (1AP-5) [99] and O-Ring (S-6) [100] of Valve Bushing (A) [101], O-Ring (I.D 1.8) [92] of the Plunger [93], O-Ring (P7-U) [98] , O-Ring (P9-U) [88] and O-Ring (1AP-11) [90] of the Valve Piston [89], and O-Ring (S-14) [95] and O-Ring (S-16) [96] of Valve Bushing (B) [97].
  • Page 27 (b) Reassembly of the Trigger section • Reassemble Trigger Arm (C) [68] with its protrusion facing upward. • Reassemble the Roll Pin D2.5 x 16 [76] with its splitting oriented as shown below. • Reassembly of the Trigger section Protrusion of Trigger Arm (C) [68] Trigger Piece (C) [66] Trigger [69] Roll Pin D2.5 x 16 [76]...

  • Page 28: Disassembly And Reassembly Of The Magazine Section

    Disassembly and Reassembly of the Magazine Section 1. Disassembly and reassembly of the magazine ass'y [Tools required] • Disassembly and reassembly of the • Flat-blade screwdriver magazine ass'y • Phillips screwdriver • Roll pin puller (ø 4, ø 2.5) • Hex. bar wrench (4 mm) •...
  • Page 29 • Disassembly and reassembly of the magazine section Body Ass’y [39] Nylon Nut M5 [57] Pin [135] Machine Screw (W/Washer) M5 x 25 (Black) [64] Magazine [132] Feeder Shaft Ring [136] Nylon Nut M5 [57] Pushing Lever Cover (B) [134] Pin [135] Magazine Cover [137] Sleeve [133]...
  • Page 30 2. Disassembly and reassembly of the Nail Holder , the Holder Shaft , etc (1) Disassembly • Pull out both Pins [135] by using the roll pin puller (ø 4 mm). Then Magazine [132] and Magazine Cover [137] can then be removed. NOTE: Be careful not to lose the two Feeder Shaft Rings [136] when pulling out the two Pins [135].
  • Page 31 Disassembly and Reassembly of the Nail Feeder Section [Tools required] • Hex. bar wrench (5 mm ) • Roll pin puller (ø 4, ø 2) • C-shaped snap ring puller for hole Body Ass’y [39] Retaining Ring For D24 Hole [110] Feed Piston Cover [109] Piston Bumper [41] Bumper [108]...
  • Page 32 1. Disassembly and reassembly of Nose, Pushing Lever (A), etc (1) Disassembly • Remove the four Nylock High Tension Bolts M6 x 20 [52]. You can then detach the Nose [43], Pushing Lever (A) [55], etc. • Remove the Shaft Ring [112] of the Nose Piece [116] by using a flat-blade screwdriver. You can then detach the Nose Piece [116] and Nose Shaft [115].
  • Page 33 3. Disassembly and reassembly of the Piston Bumper, Feeder (A), Feed Piston, etc (1) Disassembly • Remove the Nose [43] and push the lever components from the output section according to item 1 in "Disassembly and Reassembly of the Nail Feeder Section". You can then remove the Piston Bumper [41]. •...
  • Page 34 4. Disassembly and reassembly of Nail Guide, Nail Stopper (A), Nail Stopper (B), etc [Tools required] • Long-nose pliers • Flat-blade screwdriver • Hex. bar wrench (3 mm) (1) Disassembly • Grasp the Nail Guide Shaft [53] with long-nose pliers or a similar tool, lower it, and then pull it out. You can then remove Nail Guide [121] and other components together.
  • Page 35 Disassembly and Reassembly of the Cap Section [Tools required] • Wrench (width: 21 mm) (1) Disassembly • The Cap [60] is unified with an Dust Cap [61] M42 left-handed thread and Cap [60] (left-hand thread) can be removed by using a wrench.
  • Page 36 LIST NO. E062 PNEUMATIC TOOL PARTS LIST HIGH PRESSURE COIL NAILER 2009 · 12 · 11 Model NV 65HMC (E1) 132 135...
  • Page 37 PARTS NV 65HMC ITEM CODE NO. DESCRIPTION REMARKS USED 980-046 SEAL LOCK HEX. SOCKET HD. BOLT M5 X 10 887-026 PLATE 887-025 TOP COVER 886-658 MUFFLER 886-423 PROTECTOR 881-262 NYLOCK BOLT M5 X 25 886-421 EXHAUST COVER 886-418 HEAD VALVE SPRING...
  • Page 38 PARTS NV 65HMC ITEM CODE NO. DESCRIPTION REMARKS USED 886-406 FEEDER (A) 880-675 NYLOCK HIGH TENSION BOLT M6 X 20 883-755 NAIL GUIDE SHAFT 883-761 PUSHING LEVER COVER (A) 887-024 PUSHING LEVER (A) 886-650 NOSE CAP 877-371 NYLON NUT M5 GRIP RUBBER (A) SUPPLIED WITH ITEM NO.
  • Page 39 PARTS NV 65HMC ITEM CODE NO. DESCRIPTION REMARKS USED 883-099 VALVE BUSHING (A) 873-093 O-RING (1AP-3) 872-645 O-RING (P-9) 877-763 FEED PISTON O-RING (I.D. 14) 883-756 FEED PISTON 883-757 FEED SPRING (A) 883-758 FEED SPRING (B) 885-681 BUMPER 883-098 FEED PISTON COVER...

  • Page 40: Standard Accessories

    STANDARD ACCESSORIES NV 65HMC ITEM CODE NO. DESCRIPTION REMARKS USED 883-136 PNEUMATIC TOOL LUBRICANT (30 CC) 875-769 SAFETY GLASSES 886-432 CASE 12 - 09 - 5 - *ALTERNATIVE PARTS...

  • Page 41: Optional Accessories

    OPTIONAL ACCESSORIES NV 65HMC ITEM CODE NO. DESCRIPTION REMARKS USED 881-768 GRIP TAPE (A) 880-407 TAPE 876-212 PNEUMATIC TOOL LUBRICANT (1 L) - 6 - Printed in Japan 12 - 09 *ALTERNATIVE PARTS (091211N)

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