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LIST No. NV 90HMC: E061 Dec. 2009 PRODUCT NAME Hitachi 3-1/2” High Pressure Coil Nailer Model NV 90HMC MARKETING OBJECTIVE The new Model NV 90HMC is a high-pressure type [3-1/2" (90 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 90HMC 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 90HMC 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 N Powerful Nose switch mechanism Blow nozzle Dual action trigger Tool-less adjuster Easy nail loading Lock mechanism of trigger SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT. International Sales Division 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: Competitors Symbols Utilized P Company Name Model Name MAX HN90 CONTENTS Page SELLING POINTS -------------------------------------------------------------------------------------------------------------- 1 SPECIFICATIONS -------------------------------------------------------------------------------------------------------------- 3 1. Specifications------------------------------------------------------------------------------------------------------ 3 2. Nail Selection------------------------------------------------------------------------------------------------------ 4 3. Nail Punching Force --------------------------------------------------------------------------------------------- 4 4. Adjusting the Nailing Depth ------------------------------------------------------------------------------------ 6 5. Dual Action Trigger----------------------------------------------------------------------------------------------- 6 COMPARISON WITH SIMILAR PRODUCTS---------------------------------------------------------------------------- 7 1. Comparison of Specifications --------------------------------------------------------------------------------- 7 PRECAUTIONS ON SALES PROMOTION ------------------------------------------------------------------------------ 8 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 90HMC SELLING POINTS Lightweight and Compact Thanks to higher punching pressure about three times greater than that of conventional nailers, both nailer size and weight are reduced. Powerful Powerful punching force about 1.3 times greater than that of our conventional NV 90AH Nailer. High pressure nailer Conventional nailer High pressure nailer Model NV 90HMC NV 90AB P Weight 2.5 kg (5.5 lbs.) 3.0 kg (6.6 lbs.) 2.5 kg (5.5 lbs.) Height 322 mm (12-11/16”) 389 mm (15-5/16”) 327 mm (12-7/8”) Punching force ratio 1.3 1 1.1 Nose switch mechanism Capable of changing outlet sizes (“Small” and “Large”) according to nail head sizes for using various kinds of nails. (Select a nose according to the head size of nails you use.) Nail head diameter Outlet size ”Small” Outlet size ”Large” ø 6.0 to ø 7.5 mm (0.236” to 0.295”) ø 7.5 to ø 8.6 mm (0.295” to 0.339”) Nose switch 9.0 mm (0.354”) 7.0 mm (0.276”) Turn down the switch lever. Turn up the switch lever. Blow nozzle Equipped with a blow nozzle, which is very convenient in keeping the work area clean. -1- 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 Easy nail loading When you open the nail magazine cover, the nail holder automatically tilts toward you so that you can easily change nail rolls. Lock mechanism of trigger This lock mechanism locks the trigger so that it cannot be pulled. -2- SPECIFICATIONS 1. Specifications Model NV 90HMC Item Punching system Operating pressure Reciprocating piston type 2 12 to 23 kgf/cm (170 to 320 psi, 12 to 23 bar) (Gauge pressure) Punching speed Min. 3 pcs./sec. Weight 2.5 kg (5.5 lbs.) Dimensions (Length x Height x Width) 281 mm x 322 mm x 132 mm (11-1/16" x 12-11/16" x 5-3/16") Nail feed system Reciprocating piston type Nail capacity 150 to 300 (1 roll) 2.3 ltr/cycle at 20 kgf/cm2 Air consumption Air inlet Air hose Packaging (.081 ft3/cycle at 280 psi) (2.3 ltr/cycle at 20 bar) Air plug for high pressure nailer Air hose for high pressure nailer (Inner diam.: 5 to 6 mm (13/64” to 15/64”)) Corrugated cardboard box (sleeve type) Packaging dimensions 355 mm x 410 mm x 170 mm (Length x Height x Width) (14" x 16" x 6-11/16") • Case (Code No. 886432) Standard accessories • Eye protector (Code No. 875769) • Oiler (30 cc) (Code No. 883136) • Nose cap (A)(Code No. 886889) • Pneumatic tool lubricant (1 oz oil feeder) (Code No. 877153) Optional accessories • Pneumatic tool lubricant (4 oz oil feeder) (Code No. 874042) • Pneumatic tool lubricant (1) (Code No. 876212) NOTE: The Model NV 90HMC applies higher punching force than that of conventional nailers. The customer must therefore procure an air compressor and an air hose designed for highpressure nailers. The air plug of the Model NV 90HMC is exclusively designed for high pressure and cannot be connected to any air hoses and compressors that are generally used at much lower air pressures. Never modify the air plug for lower pressure. -3- 2. Nail Selection The Model NV 90HMC utilizes common wire-collated and sheet-collated nail coils of 150 to 300 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. Fig. 1 • Dimensions of nails Wire-collated coil nails Max. 8.6 mm (0.339”) 6 mm (0.236”) 2.5 mm (0.099”) 2.5 mm (0.099”) 3.8 mm (0.148”) 6.5 mm (0.256”) 50 mm (2”) 90 mm (3-1/2”) 45 mm (1-3/4”) 6 mm (0.236”) Sheet-collated coil nails Min. Max. 45 mm (1-3/4”) Min. 3 mm (0.118”) 3. Nail Punching Force Fig. 2 shows by type of wood and nail the nailer output energy provided by the supply pressure, and the nailing energy required for punching nails flush. Air pressure exceeding the intersecting point between nailer output energy and the required nailing energy for punching nails ensures fully punched nails. For example, when punching a nail measuring 3.8 mm in dia. x 90 mm in length (0.148" x 3-1/2") into a workpiece of hemlock with the Model NV 90HMC, pressure of about 19.6 bar (20 kgf/cm2, 280 psi) enables the nailer to punch the nail flush with the wood surface. Any higher pressure causes the nail head to sink below the wood surface. Fig. 2 should be used only as a reference because the values indicated vary depending on the type of wood, moisture content, and grain of wood. -4- Fig. 2 • Required nailing energy and nailer output energy Nailer output energy Required nailing energy -5-5- 4. Adjusting the Nailing Depth The nailing depth can be adjusted by simply turning the adjuster. * Adjusting the adjuster (Fig. 3) • Conduct test punching. If the nail sinks too deep, turn the adjuster knob toward the Shallow position mark). If the nail sinks too shallow, turn the adjuster knob toward the Deep position ( mark) ( (see Figs. 3 and 4). The nail sink quantity is changed 1 mm per rotation of the adjuster knob. • Do not push up the pushing lever when turning the adjuster. • Set the lock lever to the "FREE" position when punching nails. Fig. 3 Fig. 4 Lock Lock lever Flush Too deep (Turn the knob toward shallow side.) Too shallow (Turn the knob toward deep side.) Shallow Free Deep Adjuster 5. Dual Action Trigger The Model NV 90HMC is equipped with an automatic mode switching mechanism that automatically switches between "single sequential actuation mode" and "contact action mode". (1) Punching operations (automatic switching between single sequential actuation mode and contact action mode) (1) Depress the pushing lever. Nail driven (2) Pull the trigger. (3) Depress the pushing lever. Single sequential actuation mode Driven Pull the trigger. Nail driven Depress the pushing lever. Contact action mode Not driven Depress the pushing lever. Driven Driven (2) Precautions on using the dual action trigger • Nails are not punched even with the pushing lever again pressed against the workpiece and the trigger pulled in single sequential actuation mode. To punch nails continuously, remove your finger from the trigger and operate according to the contact action procedure. • Note that when you raise the Model NV 90HMC 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. Release the trigger and operate according to the procedure of the desired mode. -6- COMPARISON WITH SIMILAR PRODUCTS 1. Comparison of Specifications Maker Model Item Operating pressure Weight Dimensions (L x H x W) Punching force ratio Nail capacity Magazine type Blow nozzle Driving depth adjustment mechanism Single actuation/contact actuation selector Nose cap Free angle plug (Superior specifications: HITACHI P (High pressure nailer) NV 90HMC (High pressure nailer) NV 90AB (Conventional nailer) 12 to 23 bar (12 to 23 kgf/cm2) (170 to 320 psi) 4.9 to 8.3 bar (5 to 8.5 kgf/cm2) (70 to 120 psi) 12 to 23 bar (12 to 23 kgf/cm2) (170 to 320 psi) 2.5 kg (5.5 lbs.) 3.0 kg (6.6 lbs.) 2.5 kg (5.5 lbs.) 281 mm x 322 mm x 132 mm (11-1/16” x 12-11/16” x 5-3/16”) 292 mm x 389 mm x 132 mm (11-1/2” x 15-5/16” x 5-3/16”) 294 mm x 327 mm x 129 mm (11-1/2” x 12-7/8” x 5”) 1.3 1 1.1 300 nails Top loading (Easy nail loading) Provided 300 nails 300 nails Top loading Top loading None None Tool-less Tool-less Tool-less Automatic Manual Automatic Provided Provided Provided None Switching type (ø 7 mm, ø 9 mm) Provided Fixed type (ø 8 mm) Side Exhaust direction Forward None Fixed type (ø 8 mm) 360° changeable Handle grip Rubber Rubber Rubber Trigger lock Provided None Provided Collation Wire and Sheet Wire Wire and Sheet Head dia. 8.6 mm (0.339") 7.9 mm (0.311") 7.7 mm (0.303") Shank dia. 3.8 mm (0.148") 45 mm to 90 mm (1-3/4" to 3-1/2") 3.8 mm (0.148") 45 mm to 90 mm (1-3/4" to 3-1/2") 3.8 mm (0.148") 45 mm to 90 mm (1-3/4" to 3-1/2") Outlet (size) Applicable nails Length ) -7- PRECAUTIONS ON SALES PROMOTION 1. Safety Instructions In the interest of promoting the safest and most efficient use of the Model NV 90HMC 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. A. 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, the Instruction Manual lists general precautions and suggestions on the use of pneumatic tools, and specific precautions and suggestions on use of the pneumatic nailer, in order to enhance the safe, efficient use of the tool by the customer. Salespersons must be thoroughly familiar with the contents of the Instruction Manual to be able to offer appropriate guidance to customers during sales promotion activities. B. Warning Label Each Model NV 90HMC unit is provided with a Warning Label (illustrated below) that lists basic safety precautions on tool use. Carefully ensure that customers fully understand and follow these precautions before using the tool. -8- C. Related laws and regulations As nailers and staplers are designed to instantaneously punch nails and staples, there is an ever-present danger of misfiring and subsequent possible serious injury. Accordingly, close attention to 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. 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. Europe: EN 792-13:2000 The USA: OSHA ANSI SNT-101-2002 Hand-held-non-electric power tools-Safety requirements-Part 13: Fastener punching tools 1926.102 Eye and face protection 1926.302 Power-operated hand tools Portable, Compressed-Air-Actuated, Fastener Punching Tools-Safety Requirements for D. Precautions on operation (1) Pay special attention to the pressure, capacity and piping of the air compressor, in order to regulate air pressure supplied to the Model NV 90HMC within the range from 12 kgf/cm2 (170 psi, 12 bar) to 23 kgf/cm2 (320 psi, 23 bar). Otherwise the performance, service life and safety of the Model NV 90HMC may be adversely affected. Be sure to install a regulator when using a high-pressure air compressor with pressure set to 23 kgf/cm2 (320 psi, 23 bar) or more. In this case, adjust the air pressure to 23 kgf/cm2 (320 psi, 23 bar) or less. (2) If the dust in compressed air accumulates on the sliding portion, the Model NV 90HMC will not operate properly. Lubrication effectively removes dust and also prolongs the service life of the Model NV 90HMC in terms of maintaining good performance. Therefore, the Model NV 90HMC should be lubricated daily. Supply five to ten drops of lubricant into the air plug on the Model NV 90HMC. When not using the tool for an extended period, be sure to supply lubricant and perform idle punching two or three items to lubricate inside, and then apply a thin coating of lubricant to the steel parts to avoid rusting. • The table below shows the applicable lubricant. Please recommend the use of Hitachi nailer/tacker oil to all customers. Type of oil Brand or product name Hitachi pneumatic tool lubricant Shell sliding oil, Tonna S32 (Old Tonna T32); Code No. 877153 (1 oz. oil feeder) Code No. 874042 (4 oz. oil feeder) Code No. 876212 (1 L (1 quart) can)) (3) Be sure to fully drain the compressor’s tank to prevent deteriorated performance or malfunction of the Model NV 90HMC due to rusting. (4) Instruct the customers (especially heavy users) to properly conduct inspection and maintenance. -9- TROUBLESHOOTING GUIDE 1. Troubleshooting and Repair Problem 1) Nails cannot be punched. Possible cause ( *: Most-common cause) • Magazine is not loaded with specified genuine nails. • Magazine is loaded with abnormal nails (e.g., bent nails, too large or too small nail heads, abnormal collation). • Nails or link pieces are jammed. • Link pieces are deformed or broken. Inspection method Corrective action • Check that the magazine is correctly loaded with specified nails. • Use specified nails. • Remove abnormal nails and load the nailer with proper nails. • Remove the feed piston and check the feed piston sliding surface of the nose. • Apply grease to the sliding surface. • Polish the scratched portion with sandpaper. Replace the parts. • Nail guide face of the nose is abnormal (deformed, burrs or damaged). • Feed spring or feeder spring is abnormal (damaged or fatigued). • Feeder is abnormal (damaged or worn). • Check that the punching section is not abnormal (burrs, deformed, damaged or worn). • Deburr the nail guide face. • Correct the deformed part. • Replace abnormal parts. • Nails are not correctly loaded in the groove of the nose. • Check that nails are correctly loaded in the groove of the nose. • Load nails in the correct position in the nose. • Dust adheres to the feeder sliding portion of the nose, or lubrication is needed. • Open the nail guide and perform idle punching to check the feeder's operation. • Remove dust and then lubricate the sliding surface. • Sliding resistance of the feed piston is too high. • Air pressure is too low. • Adjust the air pressure to 12 to 23 bar (12 to 23 kgf/cm2, 170 to 320 psi). *• Air passage is clogged with broken pieces of piston bumper, etc. *• Feed piston chamber contains foreign matter such as broken pieces of piston bumper, etc. • Remove foreign matter. Replace the piston bumper with new one. • Body ---Remove foreign matter in the return air chamber. • Nose ---Remove foreign matter in the air passage and feed piston chamber. -10- Problem 1) Nails cannot be punched. (continued) Possible cause ( *: Most-common cause) Inspection method Corrective action • Air leaks from the gap between the body and the nose. • Tighten screws and check the O-rings. • O-rings are worn or deformed. • Replace the O-rings. • O-rings need lubrication. • Apply grease or lubricant. • Nail guide face is abnormal (deformed, burrs or damaged). • Check that the nail guide is not abnormal (worn, deformed or damaged). • Correct or replace the parts. • Dust adheres inside the nail guide groove, or lubrication is needed. • Check the operation of nail stopper (A) and nail stopper (B). • Remove dust and then lubricate. *• Spring is abnormal (missing, damaged or fatigued). • The claw ridge section of the nail stopper is abnormal (damaged, worn or burrs). • Magazine • Pushing lever

• Air pressure is too low. *• Piston O-ring is abnormal (worn or damaged). • Replace abnormal parts. • Check that a nail does not catch on another nail in the magazine. • Check that a nail does not catch on any part of the magazine. • Check the height of the nail holder. • Collate the nails correctly and then reload the nailer. • Remove burrs or deformed parts. Replace the parts. • Adjust the height of the nail holder correctly. • Check the operation of the pushing lever. • Correct or replace the parts. • Open the nail guide and perform idle punching to check that the driver blade is returned. • Adjust the air pressure to 12 to 23 bar (12 to 23 kgf/cm2, 170 to 320 psi). • Replace the piston O-ring. *• Piston bumper is abnormal. • Replace the piston bumper. • O-ring in the cylinder is abnormal (removed, deformed or damaged). • Reassemble or replace the parts. • Correct or replace the part. • Driver blade is abnormal (deformed, burrs or damaged). -11- Problem 1) Nails cannot be punched. (continued) Possible cause ( *: Most-common cause) Inspection method • Cylinder inner surface is abnormal (packed with dust or worn). • Check that nails can be punched at 4.9 bar (5 kgf/cm2, 70 psi). • Remove dust and then lubricate. • Replace the part. • Sleeve valve sliding surface is abnormal (seized or damaged, or lubrication needed). • Perform idle punching to check punching operation. • Replace the part. • Apply grease. • Sleeve valve rubber is abnormal (removed or damaged). • Perform idle punching to check that the driver blade is not held in the down position. • Replace the part. • Sleeve valve spring is abnormal (fatigued or damaged). • Plunger, valve piston, valve bushing (A) or valve bushing (B) is abnormal (seized or damaged). 2) Nails are punched but bent. 3) Nails cannot be completely punched into the workpiece: the heads cannot be made flush. Corrective action • Replace abnormal parts. • O-rings or sliding surfaces are worn or need lubrication. • Disassemble the control valve section and check the O-rings. • Replace abnormal parts. • Apply grease. *• Adjuster is raised too high for short nails. • Check that the adjuster is not raised too high. • Turn the adjuster lower (lower the pressure). • Nails are not completely fed into the injection port. *• Unspecified nails are used. • See item 1). • See item 1). *• Driver blade is worn. • Check that the driver blade tip is not abnormally worn. • Replace the part. • Workpiece is too hard. • Check if a nail is bent even when punched into soft wood. • Nailer cannot be used because the material is beyond its applicable range. • Adjuster is incorrectly set. • Turn the adjuster to the lowest position and then punch nails. • Set the adjuster to the optimum position. • Air pressure is too low. • Workpiece is too hard. • Check if a nail is bent even when punched into soft wood. -12- • Adjust air pressure to 12 to 23 bar (12 to 23 kgf/cm2, 170 to 320 psi). • Nailer cannot be used because the material is beyond its applicable range. Problem 3) Nails cannot be completely punched into the workpiece: the heads cannot be made flush. (continued) 4) Nails jam. Possible cause ( *: Most-common cause) Inspection method Corrective action *• Driver blade is worn. • Perform idle punching to check whether the driver blade protrudes from the nose tip. • Replace the part. *• Piston O-ring is abnormal (worn or damaged). • Cylinder inside surface is abnormal (worn or rough). • Disassemble the output section and check the piston O-ring and inside the cylinder for abnormality. • Replace abnormal parts. • Sleeve valve sliding surface is abnormal (seized or damaged, or lubrication needed). • Check the sliding surface for abnormality and lubrication. • Replace abnormal parts. • Apply grease. • Check whether the specified nails are used. • Check the nails as follows: • Use specified nails. • Remove abnormal nails and load the nailer with proper nails. [Wire-collated nails] • Collating wires are abnormal (broken, failed welding, deformed or failure at welding position). *• Collating wires are deformed (deformed in collation angle or collation pitch). [Wire-collated nails] [Wire-collated nails] [Sheet-collated nails] *• Collating sheets are abnormal (deformed or broken). • Nails are removed from the sheets. [Sheet-collated nails] *• Unspecified nails are used. *• Abnormal nails are mixed. *• Nail heads are too large or too small. Unit: mm (inch) D L1 L2 19 (0.748) 37.5 (1.476) d 6 to 8.6 2.5 to 3.8 (0.236 to 0.339) (0.099 to 0.148) [Sheet-collated nails] Unit: mm (inch) -13- D d 6 to 6.5 (0.236 to 0.256) 2.5 to 3 (0.099 to 0.118) Problem 4) Nails jam. (continued) Possible cause ( *: Most-common cause) • Feeder is worn and the sliding section abnormal. • Nail guide face of the nose or the sliding section of the feeder is abnormal (deformed, burrs or damaged). • Feed spring or feeder spring is abnormal (damaged, fatigued or removed). • Nail guide section is abnormal. • See item "1) Output section: piston, driver blade, etc." • Air pressure is too high. Inspection method Corrective action • Open the nail guide and check the position of the feeder claw. • Replace abnormal parts. • See item "1) Nail guide section." • See item "1) Nail guide section." • Perform idle or actual punching to check whether the driver blade returns completely. • See item "1) Output section: piston, driver blade, etc." • Nails may be jammed if punched at high pressure and high speed. Check the pressure and punching speed. • Adjust air pressure within the range of 12 to 23 bar (12 to 23 kgf/cm2, 170 to 320 psi). -14- 2. Possible Causes and Corrections of Air Leakage 1. Air leakage repair location • Air leakage repair location OFF Control valve section ON Magnified view of B Section of A - A -15- 2. Repair procedure (1) Check the following parts marked with an asterisk " * " for trouble. (2) Then check the seal parts (with the (3) Next, check the other possible parts. mark) for excessive wear, flaws and breaks. [Bold] numbers in the description below correspond to item numbers in the Parts List and exploded assembly diagram for the Model NV 90HMC. Possible causes Air leak point A Exhaust port Control valve OFF Control valve ON Defects on Sleeve Valve Rubber [18] (worn, * Defects on seal surface of Sleeve Valve cut or flaws), or defects on seal surface of [19] (damage, deformation or flaws on the Upper Cover [5] (damage, deformation or flaws of part). parts) Defects on Exhaust Rubber [22] (worn, Defects on O-Ring (I.D 48.5) [12], O-Ring deformation or cut) [16], O-Ring [20], and O-Ring [21] (worn, Defects on O-Ring (I.D 48.5) [12] (worn, cut or flaws) cut or flaws) Defects on seal surfaces of Exhaust Cover [15], Sleeve Valve [19] and Cylinder [36] (damage, deformation or flaws on ( parts) B Exhaust Cover Loose Nylock Bolt M5 x 65 [4] Damage on Gasket (C) [17] and Packing (B) [8] Defects on seal surfaces of Body Ass'y [42], Exhaust Cover [15], Plate [9] and Upper Cover [5] (damage, deformation or flaws) C Nose1 Loose Nylock High Tension Bolt M7 x 25 [56] Defects on O-Ring (1AP-3) [106] (worn, cut or flaws) Defects on O-Ring (S-34) [46] of Body Ass'y [42] (cut or flaws) and defects on its seal part (damage, deformation or flaws on part) D Nose 2 Defects on O-Ring (S-36) [37] of Cylinder Defects on Piston Bumper [45] Plate [38] (worn, cut or flaws) (deformation or crack damage of Defects on O-Ring (S-32) [25] of Cylinder parts) [36] (worn, cut or flaws) Defects on Piston (H) [11] and Nose [47] Defects on seal surfaces of Body Ass'y (deformation, [42] and Cylinder Plate [38] (damage, defects) deformation or flaws of ( dust, or seal surface parts) E Feed Piston Defects on Feed Piston O-Ring (I.D. 14) [108] (worn, cut or flaws) or defects on sliding surface of Nose [47] (worn, deformation or flaws) Defects on O-ring (P-9) [107] of Nose [47] (worn, cut or flaws) or defect on sliding surface of Feed Piston [109] (worn, deformation or flaws) -16- Possible causes Air leak point F Control valve exhaust port Control valve OFF Control valve ON Defect on O-Ring (P7-U) [89] of Valve Defect on O-Ring (1AP-11) [92] and O- Piston [91] (worn, cut or flaws) Ring (P9-U) [90] of Valve Piston [91] Defect on O-Ring (I.D 1.8) [94] of Plunger (worn, cut or flaws) [95] (worn, cut or flaws) Defect on O-Ring (S-16) [87] of Valve Defect on O-Ring (S-14) [86] of Valve Bushing (B) [88] (cut or flaws) Bushing (B) [88] (worn, cut or flaws) Defect on O-Ring (1AP-5) [96] of Valve * Defect on inner surface of Body Ass’y [42] valve chamber ( part) Bushing (A) [98] (worn, cut or flaws) * Defect on Valve Plate [24] seal surface (breaks, deformation, flaws on part) * Defect on the inner surface of Body Ass’y [42] valve chamber ( G Control valve Defect on O-Ring (S-16) [87] and O-Ring Defect on O-Ring (S-16) [87] and O-Ring (S-6) [97] of Valve Bushing (A) [98] (worn, (S-6) [97] of Valve Bushing (A) [98] (worn, cut or flaws) cut or flaws) Defect on sliding surface of Plunger [95] Defect on sliding surface of Plunger [95] O-Ring (S-6) [97] (deformation or flaws on O-Ring (S-6) [97] (deformation or flaws on part) H Valve Bushing (air duster valve section) part) Break of Valve Packing [26] Defect on O-Ring (1AP-3) [30] (worn, cut or flaws) or defect on Valve Bushing [33] seal surface (flaws or breaks on part) Loose Valve Bushing [33] screw (lefthanded thread) I Cap part) (Defects on O-Ring (I.D 37.2) [61] (worn, cut or flaws)) Loose Cap (Gold) [62] screw (left-handed thread) Defects on seal surface of Body Ass'y [42] and Cap (Gold) [62] (damage, deformation or flaws on part) -17- REPAIR GUIDE The following describes the most essential precautions on disassembly and reassembly of the nailer. The NV 90HMC Coil Nailer mainly consists of six sections: output section, air duster valve section, control valve section, magazine section, nail feeder section and cap section. 1. Precautions on Disassembly and Reassembly [Bold] numbers in the description below correspond to item numbers in the Parts List and exploded assembly diagram for the Model NV 90HMC. CAUTION: Before starting disassembly and reassembly of the nailer, be sure to lock the trigger (by turning the lock lever to the "Lock" position, disconnect the air hose, empty the compressor’s air tank, and remove all nails from the nailer. 1. General notices on reassembly • Apply grease (Attolub No.2) to O-rings and O-ring sliding portions. • When mounting an O-ring, be careful not to damage it and keep the O-ring and its groove clean. • Apply grease (Attolub No.2) to the inner surface of Cylinder [36]. • Replace a broken Gasket (C) [17] and Packing (B) [8] with a new one and make sure it does not leak any air. • Always keep the control valve section away from any contaminant. • Apply the supplied oil to the nail feeding slide section. • When replacing Piston Bumper [45], be sure to check and make sure the air channels of Body Ass’y [42] and Nose [47] are free from broken pieces of Piston Bumper [45] and other unwanted particles. Screw Tightening Torques • Nylock High Tension Bolt M7 x 25 [56]---------------------------------- 19.6 ± 3 N•m{ 200 ± 30 kgf•cm} • Seal Lock Hex.Socket Flat Hd. Bolt M5 x 10 [1] ------------------------- 4.4 ± 0.3 N•m {45 ± 3 kgf•cm} • Hex. Socket Hd. Bolt M5 x 22 [115]----------------------------------------- 8.3 ± 0.5 N•m {85 ± 5 kgf•cm} • Nylock Bolt M5 x 65 [4] -------------------------------------------------------- 8.3 ± 0.5 N•m{85 ± 5 kgf•cm} • Nylock Hex. Socket Hd. Bolt M4 x 12 [133]------------------------------- 4.4 ± 0.3 N•m {45 ± 3 kgf•cm} • Machine Screw (W/Washers) M5 x 25 (Black) [105] ------------------- 1.96 ± 0.5 N•m {20 ± 5 kgf•cm} • Tapping Screw D3 x 14 [148]------------------------------------------------- 0.5 ± 0.2 N•m {5 ± 2 kgf•cm } • Cap [62]---------------------------------------------------------------------------- 24.5 ± 5 N•m {250 ± 50 kgf•cm} • Air Plug L-Pt 1/4 [64] ----------------------------------------------------------- 24.5 ± 5 N•m {250 ± 50 kgf•cm} • Valve Bushing [33] -------------------------------------------------------------- 9.8 ± 2 N•m {100 ± 20 kgf•cm } -18- Disassembly and Reassembly of the Output Section 1. Disassembly and reassembly of the Upper Cover , Exhaust Cover , Piston (H), cylinder ass’y etc [Tools required] • Hex. bar wrench (4 mm) • Phillips screwdriver • Flat-blade screwdriver Seal Lock Hex.Socket Flat Hd. Bolt M5 x 10 [1] Washer [2] Sleeve Valve Rubber [18] Protector [3] Sleeve Valve [19] Nylock Bolt M5 x 65 [4] O-Ring [20] Exhaust Rubber [22] O-Ring [21] Upper Cover [5] Head Bumper [6] Valve Plate [24] Head Guide [7] Packing (B) [8] O-Ring (S-32) [25] Sleeve Valve Spring [23] Plate [9] Cylinder [36] Packing (B) [8] Piston O-Ring [10] Piston (H) [11] O-Ring (S-36) [37] O-Ring (I.D 48.5) [12] Cylinder Plate [38] Muffler (A) [13] Muffler [14] O-Ring (B) [39] Cylinder Ring [40] Exhaust Cover [15] Body Ass'y [42] O-Ring [16] Gasket (C) [17] (1) Disassembly • Loosen the Seal Lock Hex.Socket Flat Hd. Bolt M5 x 10 [1] and then remove the Protector [3]. • Loosen the four Nylock Bolt M5 x 65 [4] and then remove the Upper Cover [5]. You can then detach the components of the output section (Exhaust Cover [15], Cylinder [36], Piston (H) [11], and Cylinder Plate [38]). • To remove the Exhaust Cover [15], first press the Sleeve Valve [19] against the Body Ass'y [42] and detach the Sleeve Valve [19] from the nailer body. • When removing the Valve Plate [24], be sure to first remove the Exhaust Rubber [22]. • Insert the tip of a precision screwdriver or other sharp-pointed rod into the gap between components when disassembling the Head Bumper [6], Sleeve Valve Rubber [18], Exhaust Rubber [22] and Cylinder Ring [40] for easier removal. However, be careful not to damage the mating components. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Apply grease to the inner surfaces of the Piston O-Ring [10] and Cylinder [36] prior to reassembly. • Apply grease to the O-Ring (I.D 48.5) [12], O-Ring [16], O-Ring [20], O-Ring [21], O-Ring (S-32) [25] and O-Ring (S-36) [37] prior to reassembly. • Apply grease to the outer surface of the Exhaust Rubber [22] and inner surface of the Sleeve Valve [19] prior to reassembly. -19- • First mount the Cylinder Plate [38] on the Cylinder Ring [40], and then place the thinner part over the air hole of the Cylinder [36]. • Reassembly of the cylinder ring Cylinder [36] Air hole Cylinder Ring [40] • Be sure to first mount the Valve Plate [24] on the Cylinder [36], and then mount the Exhaust Rubber [22] on the Cylinder [36]. • Reassembly of the exhaust rubber Exhaust Rubber [22] Cylinder [36] Valve Plate [24] • When reassembling the Sleeve Valve [19], be • Reassembly of the sleeve valve careful not to drop the Sleeve Valve Spring [23] or turn the Sleeve Valve [19]. Be careful not to lose any of the 16 Sleeve Valve Springs [23]. Sleeve Valve [19] Sleeve Valve Spring [23] • The O-rings of the Exhaust Cover [15] look alike. Do not mix up these parts. • Reassembly of O-rings on the exhaust cover Exhaust Cover [15] O-Ring (I.D 48.5) [12] Upper side (Plate [9] inside) Upper side: O-Ring (I.D 48.5) [12] Lower side: O-Ring [16] • Gasket (C) [17] and Packing (B) [8] are similar. Do not mix them up these parts. O-Ring [16] Lower side (Body Ass'y [42] side) -20- Disassembly and Reassembly of the Air Duster Valve Section [Tools required] • Socket wrench (14 mm) • Flat-blade screwdriver Retaining Ring (E-Type) For D4 Shaft [34] Valve Bushing [33] Knob [35] (left-handed thread) O-Ring (S3) [32] O-Ring (1AP-3) [30] O-Ring (S-10) [31] Plunger [29] Upper Cover [5] Plunger O-Ring [28] Spring [27] Valve Packing [26] (1) Disassembly • Remove the Valve Bushing [33] (left-handed thread) by using the socket wrench (14 mm). You can detach the Plunger [29] and Knob [35] together. You can also detach the Spring [27] and Valve Packing [26]. • After removing the Knob [35], Retaining Ring (E-Type) For D4 Shaft [34] from the Plunger [29], you can detach the Plunger [29] from the Valve Bushing [33]. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Fully apply grease to the respective O-rings. • Mount the Retaining Ring (E-Type) For D4 Shaft [34] on the Plunger [29] and then push the Knob [35] straight in until it contacts the Retaining Ring (E-Type) For D4 Shaft [34]. -21- 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) [86] Feeder Shaft Ring [41] O-Ring (S-16) [87] Machine Screw (W/Washers) M5 x 25 (Black) [105] Valve Bushing (B) [88] O-Ring (P7-U) [89] Roll Pin D3 x 28 [100] Body Ass'y [42] Steel Ball D3.175 [101] Lock Spring [102] O-Ring (P9-U) [90] Valve Piston [91] O-Ring (1AP-11) [92] Roll Pin D3 x 28 [100] Lock Knob [103] Trigger Piece (C) [65] Trigger Spring [66] Roll Pin D1.6 x 10 [71] Trigger Arm (C) [67] Roll Pin D2.5 x 16 [72] Trigger [68] Plunger Spring [93] O-Ring (I.D 1.8) [94] Plunger [95] O-Ring (1AP-5) [96] O-Ring (S-6) [97] Trigger Spring [69] Pin D2 x 8 [85] Pushing Lever Guide [70] Valve Bushing (A) [98] O-Ring (S-16) [87] (1) Disassembly • Remove the Feeder Shaft Ring [41]. The Lock Knob [103] then comes off. • Pull out the Roll Pin D3 x 28 [100]. The Pushing Lever Guide [70] and trigger section can then be removed. Pull out Roll Pin D2.5 x 16 [72]. The components of the trigger section can then be removed. • Pull out the two Roll Pins D3 x 28 [100] by using the roll pin puller (ø 3), and then remove the control valve section by following the procedure below. • Disassembly of control valve section Valve Bushing (A) [98] Flat-blade screwdriver Plunger [95] Valve Piston [91] Pin D2 x 8 [85] (a) Insert the tip of the flat-blade screwdriver into the groove of Valve Bushing (A) [98] and lift up Valve Bushing (A) [98] as shown on the left by applying the principle of leverage with the body as the supporting point. NOTE: To protect the body, place a piece of cloth between the screwdriver shank and the body. (b) After removing the two Pin D2 x 8 [85] by using a slim rod (ø 1.8), you can detach Valve Bushing (B) [88], the Valve Piston [91], Plunger Spring [93], and Plunger [95]. NOTE: Never use pliers to clamp the Plunger [95] end and pull it out. The O-Ring (P9-U) [90] is very hard. Be careful not to damage its periphery by using a precision screwdriver or similar tool. Pin D2 x 8 [85] Valve Bushing (B) [88] -22- (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) [87], O-Ring (1AP-5) [96] and O-Ring (S-6) [97] of Valve Bushing (A) [98], O-Ring (I.D 1.8) [94] of the Plunger [95], O-Ring (P7-U) [89], O-Ring (P9-U) [90] and O-Ring (1AP-11) [92] of the Valve Piston [91], and O-Ring (S-14) [86] and O-Ring (S-16) [87] of Valve Bushing (B) [88]. • Match the concave portion of Valve Bushing (A) [98] with that of Valve Bushing (B) [88] as shown below, and then insert the two Pin D2 x 8 [85] into both. For reassembly on the Body Ass’y [42], first insert the roll pin puller (ø 3) by making sure the pin passes through the roll pinhole, and then hammer in the two Roll Pin D3 x 28 [100]. Orient the splitting of Roll Pin D3 x 28 [100] as shown below at reassembly. NOTE: Always match the roll pin groove of Valve Bushing (A) [98] with the roll pinhole of the Body Ass’y [42] before hammering in the roll pin. Otherwise, the periphery of Valve Bushing (A) [98] will be damaged, thereby inhibiting disassembly and reassembly of the control valve section. • Reassembly of the control valve section Valve Bushing (B) [88] concave portion Pinholes Match these Valve Bushing (A) [98] concave portion Roll pinholes Roll Pin D3 x 28 [100] Splitting direction Valve Bushing (A) [98] Plunger [95] Pin groove Pin groove Valve Bushing (A) [98] • After reassembly, make sure that the Plunger [95] moves smoothly. -23- (b) Reassembly of the Trigger section • Reassemble Trigger Arm (C) [67] with its protrusion facing upward. • Reassemble the Roll Pin D2.5 x 16 [72] with its splitting oriented as shown below. • Reassembly of the Trigger section Protrusion of Trigger Arm (C) [67] Trigger Piece (C) [65] Trigger [68] Roll Pin D2.5 x 16 [72] splitting direction Trigger Spring [66] Body Ass’y [42] Through hole (ø 3) of Pushing Lever (C) [75] (Apply grease at reassembly.) Trigger section ø 3 x 19 rod Trigger Spring [69] Roll Pin D3 x 28 [100] splitting direction Pushing Lever Guide [70] • For easier reassembly of the Trigger section onto the Body Ass’y [42], mount the Trigger Spring [69] and Trigger section onto the Pushing Lever Guide [70] in advance by using the ø 3 x 19 rod. • Orient the splitting of the Roll Pin D3 x 28 [100] as shown above at reassembly. • Be careful not to reverse the insertion direction of the Roll Pin D3 x 28 [100] when remounting the Pushing Lever Guide [70] on the Body Ass’y [42]. • Apply grease (No.777-1, P/N-325149) to the through hole (ø 3) of the Pushing Lever (C) [75] when remounting Pushing Lever (C) [75] on the Pushing Lever Guide [70]. -24- Disassembly and Reassembly of the Magazine Section 1. Disassembly and reassembly of the magazine ass'y • Disassembly and reassembly of the magazine ass'y [Tools required] • Flat-blade screwdriver • Phillips screwdriver • Roll pin puller (ø 4, ø 2.5) • Hex. bar wrench (4 mm) • M5 spanner (1) Disassembly • Loosen the Hex. Socket Hd. Bolt M5 x 22 [115] and Nylon Nut M5 [134] by using the Hex. bar wrench (4 mm) and M5 spanner, and then remove the Sleeve [135]. • Uncouple and remove the Nose [47] by deforming Pushing Lever Cover (A) [136] by using a flat-blade screwdriver or similar tool. Fitting portion • Loosen the Machine Screw (W/Washers) M5 x 25 (Black) [105] on the Body Ass'y [42]. You can then detach the Magazine [137] and other parts together. Use a flat-blade screwdriver to deformation. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Fold back the Cover [131] twice, fit its hole to the convex portion of the Magazine [137], and then press it with Pushing Lever Cover (A) [136]. The Cover [131] must be located outside Pushing Lever Cover (A) [136]. • This nailer has its Name Plate [151] attached to the Magazine Cover [142]. So when replacing the Magazine Cover [142] with a new one, you must also order a new Name Plate [151] and attach it to the Magazine Cover [142]. -25- • Disassembly and reassembly of the magazine section Body Ass'y [42] Machine Screw (W/Washers) M5 x 25 (Black) [105] Nylon Nut M5 [134] Warning Label [139] Pin [140] Magazine [137] Feeder Shaft Ring [141] Nylon Nut M5 [134] Pin [140] Magazine Cover [142] Sleeve [135] Pushing Lever Cover (A) [136] Feeder Shaft Ring [141] Holder Cap (A) [144] Nose [47] Concave portion Nail Holder [145] Name Plate [151] Ratchet Spring [146] Tapping Screw D3 x 14 [148] Hex. Socket Hd. Bolt M5 x 22 [115] Washer M4 [147] Holder Shaft [149] Spring [150] Locate the hole of the Cover [131] between the convex portion of the Magazine [137] and the concave portion of Pushing Lever Cover (A) [136]. -26- 2. Disassembly and reassembly of the Nail Holder , the Holder Shaft , etc (1) Disassembly • Pull out the two Pins [140] by using the roll pin puller (φ4). The Magazine [137] and Magazine Cover [142] can then be removed. • Remove Holder Cap (A) [144] and loosen the Tapping Screw D3 x 14 [148] by using the Phillips screwdriver. You can then detach the two Trigger Arm Ass'ys [153], Nail Holder [145], Holder Shaft [149] and Spring [150]. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • When mounting the Tapping Screw D3 x 14 [148] on the Holder Shaft [149], firmly fit the Washer M4 [147] to the tapping screw and mount it with the screw head on the boss side of the Holder Shaft [149]. • When mounting the Ratchet Spring [146] on the Nail Holder [145], mount the Ratchet Spring [146] from the side opposite the protrusion of the Nail Holder [145], as shown below. After reassembly, make sure the ratchet spring is oriented as shown below. • When mounting the Holder Shaft [149] on the Magazine [137], make sure the Spring [150] is just between the depression of the Magazine [137] and the protrusion of the Holder Shaft [149] before inserting the Pin [140]. • Confirm the following after reassembly: ○ The Nail Holder [145] tilts when the Magazine Cover [142] is opened. ○ The Nail Holder [145] smoothly retracts into the Magazine [137] when the Magazine Cover [142] is closed. • Disassembly and reassembly of the Nail Holder , the Holder Shaft , etc Convex portion of the Holder Shaft [149] Nail Holder [145] Pin [140] Spring [150] Concave portion of the Magazine [137] Convex portion of the Nail Holder [145] Tow Washer M4 [147] Tapping Screw D3 x 14 [148] Ratchet Spring [146] Boss of the Holder Shaft [149] -27- 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 Retaining Ring For D24 Hole [114] Body Ass'y [42] Feed Piston Cover [113] O-Ring (1AP-3) [106] Bumper [112] Feed Piston [109] Feed Spring (B) [111] Piston Bumper [45] Feed Spring (A) [110] O-Ring (S-34) [46] Feed Piston O-Ring (I.D. 14) [108] Nose [47] O-Ring (P-9) [107] Change Knob [48] Pushing Lever Spring (B) [73] Pushing Lever Spring (A) [74] Pushing Lever (C) [75] Adjuster [76] Lock Spring [49] Hex. Socket Hd. Bolt M5 x 22 [115] Steel Ball D3.175 [50] Roll Pin D2 x 16 [77] Shaft Ring [117] Adjuster Spring [78] Roll Pin D4 x 18 [51] Nose Bumper [116] Plunger (B) [55] Urethane Shaft [120] Adjuster Plate (C) [79] Adjuster Plate (A) [80] Feeder Arm (B) [52] Nose Sleeve [118] Spring [121] O-Ring (S-4) [81] Nose Piece (A) [122] Feeder Spring [53] Shaft Ring [117] Feeder (A) [54] Pushing Lever (B) [82] O-Ring (S-5) [83] Nose Shaft [119] Retaining Ring (E-Type) For D3 Shaft [84] Nylock High Tension Bolt M7 x 25 [56] Pushing Lever Cover (B) [58] Pushing Lever (A) [59] Nose Cap (A) [60] -28- 1. Disassembly and reassembly of Nose, Pushing Lever (A), etc (1) Disassembly • Remove the four Nylock High Tension Bolts M7 x 25 [56]. The Nose [47] and Pushing Lever (A) [59] can then be removed. • Remove the Shaft Ring [117] of Nose Piece (A) [122] by using the slotted screwdriver. You can then detach Nose Piece (A) [122], the Nose Shaft [119], two Nose Sleeves [118], Spring [121], Urethane Shaft [120] and Nose Bumper [116]. • Remove the Shaft Ring [117] of the Change Knob [48] by using the slotted screwdriver. You can then detach the Change Knob [48]. • When detached, the Nose Bumper [116] has weak adhesive force. If the Nose Bumper [116] must be detached, you must order a new one, clean and degrease the bumper site, adhere it to the end of the Nose [47], and then press-fit it to the site. Orient the bumper correctly. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Apply grease to the O-Ring (S-34) [46] and O-Ring (1AP-3) [106], fit both to the outer periphery of the inlaid part of the Nose [47], and carefully conduct reassembly. • Match the bent part of Adjuster Plate (A) [80] with the depression of the Pushing Lever Guide [70] for reassembly. • After reassembly, make sure the push lever components and Adjuster [76] move smoothly. • Apply grease to Nose Piece (A) [122] and the two Nose Sleeves [118].at reassembly. Be careful not to lose the two Nose Sleeves [118]. • Disassembly and reassembly of Nose, Pushing Lever (A), etc Pushing Lever Guide [70] Adjuster [76] Pushing Lever (A) [59] Nose Bumper [116] Convex portion of Adjuster Plate (A) [80] Nose [47] Fit convex portion to concave portion. End face of Nose [47] 2. Disassembly and reassembly of the adjuster section (1) Disassembly • Remove the Retaining Ring (E-Type) For D3 Shaft [84]. You can then disassemble the Adjuster [76] section into Pushing Lever (A) [59], Pushing Lever Cover (B) [58], and Adjuster [76] components. • Pull out the Roll Pin D2 x 16 [77] by using the roll pin puller (ø 2). You can then disassemble the Adjuster [76] section into its components. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Reassemble with the bent portion of Adjuster Plate (A) [80] facing towards the Adjuster [76]. • Reassemble with the convex portion of Adjuster Plate (C) [79] facing Adjuster Plate (A) [80]. • Disassembly and reassembly of the adjuster section Adjuster [76] Adjuster Plate (C) [79] Adjuster Plate (A) [80] bent part Adjuster Spring [78] Pushing Lever (B) [82] Bent part Convex portion Adjuster Plate (A) [80] -29- 3. Disassembly and reassembly of the Piston Bumper, Feeder (A), Feed Piston, etc (1) Disassembly • Remove the Nose [47] 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 [45]. • Remove the Retaining Ring For D24 Hole [114] by using the C-shaped snap ring puller for the hole, while pressing the Feed Piston Cover [113] with your finger so that it does not pop up. You can then remove the Feed Piston Cover [113], Bumper [112], Feed Spring (A) [110], and Feed Spring (B) [111]. • Pull out the Roll Pin D4 x 18 [51] by using the roll pin puller (ø 4). You can then remove the Feed Piston [109] and Feeder Arm (B) [52]. • Push out the Plunger (B) [55] by using the roll pin puller (ø 4). You can then remove Feeder (A) [54] and the Feeder Spring [53] from Feeder Arm (B) [52]. (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • If the air passages of the Body Ass’y [42] and Nose [47] and the feed piston chamber become clogged with broken pieces of the Piston Bumper [45] or other objects, the Feed Piston [109] may not work properly. So, when replacing the Piston Bumper [45], clean these parts prior to reassembly. • Disassembly and reassembly of Piston Bumper, Feeder (A), Feed Piston, etc Magazine side Piston Bumper [45] Feeder Arm (B) [52] Roll Pin D4 x 18 [51] Groove Stepped Split side Groove Retaining Ring For D24 Hole [114] Feed Piston [109] Body Ass'y [42] O-Ring (P-9) [107] Surface A Feed piston chamber Feed Piston Cover [113] Feed Piston O-Ring (I.D. 14) [108] Feeder Arm (B) [52] Roll Pin D4 x 18 [51] Amount of protrusion: 1 to 1.3 mm Nose [47] • Apply grease to the O-Ring (P-9) [107] and Feed Piston O-Ring [108] prior to reassembly. • Apply grease to the groove of the Feed Piston [109]. • Assemble the Bumper [112] with its stepped part on the Feed Piston [109] side. • Grease must be applied to the sliding parts of the Feed Piston [109] and O-Ring of the Nose [47] prior to reassembly. However, too much grease on Surface A will adversely affect Feed Piston [109] movement (at low air pressure). • Assemble the Roll Pin D4 x 18 [51] with its split side on the magazine side as shown above. After reassembly, the amount of protrusion at both ends must match (at 1 to 1.3 mm). • Make sure the Retaining Ring For D24 Hole [114] is just in the groove of the Nose [47]. -30- 4. Disassembly and reassembly of Nail Guide, Nail Stopper (A), Nail Stopper (B), etc [Tools required] • Flat-blade screwdriver • Hex. bar wrench (3 mm) (1) Disassembly • Remove the Shaft Ring [117] of the Nail Guide Shaft [57] by using the slotted screwdriver, and then pull out the Nail Guide Shaft [57]. You can then detach the Nail Guide [125] and other components together. • Remove the two Nylock Hex. Socket Hd. Bolt M4 x 12 [133] by using the Allen wrench (3 mm). You can then detach Sleeve (B) [132], the Nail Guide Cover [130], Stopper Spring (A) [127], Stopper Spring (B) [129] and Cover [131]. • Remove the Shaft Ring [117] of the Guide Lock [123] by using the flat-blade screwdriver, and then pull out Guide Lock [123]. You can remove Nail Stopper (A) [126] and Nail Stopper (B) [128]. • Disassembly and reassembly of Nail Guide, Nail Stopper (A), Nail Stopper (B), etc Shaft Ring [117] Nose [47] Guide Lock [123] Spring [124] Nail Guide [125] Nail Stopper (A) [126] Stopper Spring (A) [127] Nail Stopper (B) [128] Shaft Ring [117] Stopper Spring (B) [129] Nail Guide Shaft [57] Cover [131] Nail Guide Cover [130] Sleeve (B) [132] Nylock Hex. Socket Hd. Bolt M4 x 12 [133] (2) Reassembly Conduct reassembly by reversing the disassembly procedure, but note the following: • Completely clean the claw groove of the Nail Guide [125] prior to reassembly. • Completely engage the Stopper Spring (A) [127] and Stopper Spring (B) [129] with the convex portions of Nail Stopper (A) [126] and Nail Stopper (B) [128] prior to reassembly. In this case, be careful no to mix up Stopper Spring (A) [127] and Stopper Spring (B) [129]. • After reassembly, press Nail Stopper (A) [126] and Nail Stopper (B) [128] respectively with your fingers and make sure both return smoothly. • Assemble the Nail Guide Shaft [57] with its chamfered portion facing up. • Fold back the end of the Cover [131] and fit it into the convex portion of the Magazine [137]. -31- Disassembly and Reassembly of the Cap Section [Tools required] • Wrench (width: 21 mm) (1) Disassembly Dust Cap [63] Cap [62] (left-hand thread) Body Ass'y [42] Air Plug L-PT 1/4 [64] (left-handed thread) O-Ring (I.D 37.2) [61] • The Cap [62] is unified with an M42 left-handed thread and can be removed by using a wrench. (2) Reassembly • Conduct reassembly by reversing the disassembly procedure. Apply grease the to O-Ring (I.D 37.2) [61] at reassembly. Checks after Reassembly 1. Check and confirm the following before connecting compressed air to the nailer: • Tightening torque of respective screws • The Plunger [95] slides smoothly. • The Adjuster [76] can be rotated smoothly by hand. • The Trigger [68] is locked and you cannot pull it when the Lock Knob [103] is in the "Lock" position. • You can pull the Trigger [68] smoothly when the Lock Knob [103] is in the "Free" position. • Press Pushing Lever (A) [59] against a piece of wood and make sure it slides smoothly. • Press Nail Stopper (A) [126] and Nail Stopper (B) [128] respectively with your fingers and make sure both return smoothly. • Press the Knob [35] of the air duster valve section by your fingers and make sure the Plunger [29] moves smoothly. • Turn the Change Knob [48] and make sure the size of the ejection port varies correctly. 2. Connect compressed air to the nailer and confirm the following: • No air leaks from any part of the nailer. • The nailer is inactive when you pull the Trigger [68] while the Lock Knob [103] is in the "Free position." The nailer does not work when Pushing Lever (A) [59] is pressed against a piece of wood. • Open the Nail Guide [125], make empty shoots at 12 bar {12 kgf/cm2} in this state, and make sure the Feed Piston [109] moves steadily. • Nail at 12 bar {12 kgf/cm2} and make sure the Piston (H) [11] returns completely after nailing. • Nail at 12 bar {12 kgf/cm2}. Make sure there are no missing or bent nails. NOTE: Turn the Adjuster [76] knob to the lowest sink position for test nailing. • Pull the Trigger [68], press Pushing Lever (A) [59] against a piece of wood, and make sure you can nail continuously. Press Pushing Lever (A) [59] against a piece of wood, pull the Trigger [68], and make sure you can nail each time you pull the Trigger [68]. • Press the Knob [35] of the air duster valve section and make sure air jets out from the nozzle. -32- LIST NO. E061 PNEUMATIC TOOL PARTS LIST HIGH PRESSURE COIL NAILER Model NV 90HMC 35 34 1 502 501 33 2009 12 11 (E1) 503 32 2 31 30 29 3 28 27 26 153 4 64 5 37 66 38 67 39 99 100 102 100 45 44 106 46 107 108 109 110 B 18 19 20 123 93 94 95 96 A 97 84 98 85 87 134 140 141 136 140 137 142 143 126 117 56 57 120 118 121 122 58 141 127 116 A 128 129 117 130 144 B 145 146 119 21 22 92 125 50 55 54 135 124 52 53 114 111 134 115 49 51 113 138 48 15 78 139 47 14 91 83 112 12 77 82 103 43 90 81 105 101 76 80 104 41 89 79 70 42 17 71 72 69 40 8 16 65 68 9 88 75 61 8 87 74 7 13 73 62 6 11 86 71 63 36 10 67 65 59 23 154 137 140 133 60 148 150 132 25 152 151 149 117 131 24 147 144 150 142 PARTS ITEM NO. NV 90HMC CODE NO. DESCRIPTION NO. USED 1 887-128 SEAL LOCK HEX.SOCKET FLAT HD. BOLT M5 X 10 1 2 885-264 WASHER 1 3 886-890 PROTECTOR 1 4 885-854 NYLOCK BOLT M5 X 65 4 5 886-901 UPPER COVER 1 6 886-898 HEAD BUMPER 1 7 886-904 HEAD GUIDE 1 8 886-902 PACKING (B) 2 9 886-903 PLATE 1 10 886-881 PISTON O-RING 1 11 886-880 PISTON (H) 1 12 886-900 O-RING (I.D 48.5) 1 13 885-851 MUFFLER (A) 1 14 885-850 MUFFLER 1 15 887-127 EXHAUST COVER 1 16 887-129 O-RING 1 17 885-852 GASKET (C) 1 18 885-839 SLEEVE VALVE RUBBER 1 19 886-896 SLEEVE VALVE 1 20 887-126 O-RING 1 21 885-841 O-RING 1 22 885-844 EXHAUST RUBBER 1 23 885-846 SLEEVE VALVE SPRING 16 24 886-899 VALVE PLATE 1 25 872-767 O-RING (S-32) 1 26 881-711 VALVE PACKING 1 27 881-900 SPRING 1 28 878-607 PLUNGER O-RING 1 29 886-044 PLUNGER 1 30 873-093 O-RING (1AP-3) 1 31 987-105 O-RING (S-10) 1 32 881-715 O-RING (S3) 1 33 885-027 VALVE BUSHING 1 34 968-643 RETAINING RING (E-TYPE) FOR D4 SHAFT 1 35 884-334 KNOB 1 36 886-894 CYLINDER 1 37 984-483 O-RING (S-36) 1 38 886-895 CYLINDER PLATE 1 39 985-765 O-RING (B) 1 40 881-244 CYLINDER RING 1 41 886-669 FEEDER SHAFT RING 1 42 886-893 BODY ASS'Y 1 43 883-513 WARNING LABEL (A) 1 44 886-342 HITACHI PLATE 1 45 886-882 PISTON BUMPER 1 46 980-879 O-RING (S-34) 1 47 886-883 NOSE 1 48 887-124 CHANGE KNOB 1 49 882-923 LOCK SPRING 1 50 959-148 STEEL BALL D3.175 (10 PCS.) 1 -2- *ALTERNATIVE PARTS REMARKS INCLUD. 98 12 - 09 PARTS ITEM NO. NV 90HMC CODE NO. DESCRIPTION NO. USED 51 949-498 ROLL PIN D4 X 18 (10 PCS.) 1 52 883-144 FEEDER ARM (B) 1 53 883-143 FEEDER SPRING 1 54 886-886 FEEDER (A) 1 55 883-093 PLUNGER (B) 1 56 993-040 NYLOCK HIGH TENSION BOLT M7 X 25 4 57 883-091 NAIL GUIDE SHAFT 1 58 883-113 PUSHING LEVER COVER (B) 1 59 886-892 PUSHING LEVER (A) 1 60 886-889 NOSE CAP (A) 1 61 880-183 O-RING (I.D 37.2) 1 62 886-426 CAP (GOLD) 1 63 877-914 DUST CAP 1 64 883-135 AIR PLUG L-PT 1/4 1 65 886-626 TRIGGER PIECE (C) 1 66 886-627 TRIGGER SPRING 1 67 886-625 TRIGGER ARM (C) 1 68 886-623 TRIGGER 1 69 883-759 TRIGGER SPRING 1 70 886-047 PUSHING LEVER GUIDE 1 71 886-228 ROLL PIN D1.6 X 10 1 72 881-951 ROLL PIN D2.5 X 16 1 73 883-302 PUSHING LEVER SPRING (B) 1 74 883-305 PUSHING LEVER SPRING (A) 1 75 882-891 PUSHING LEVER (C) 1 76 882-889 ADJUSTER 1 77 880-093 ROLL PIN D2 X 16 1 78 882-890 ADJUSTER SPRING 1 79 884-973 ADJUSTER PLATE (C) 1 80 882-886 ADJUSTER PLATE (A) 1 81 981-317 O-RING (S-4) 1 82 886-043 PUSHING LEVER (B) 1 83 872-822 O-RING (S-5) 1 84 872-971 RETAINING RING (E-TYPE) FOR D3 SHAFT 1 85 949-778 PIN D2 X 8 (10 PCS.) 2 86 876-319 O-RING (S-14) 1 87 876-031 O-RING (S-16) 2 88 886-910 VALVE BUSHING (B) 1 89 883-105 O-RING (P7-U) 1 90 883-104 O-RING (P9-U) 1 91 883-101 VALVE PISTON 1 92 878-764 O-RING (1AP-11) 1 93 883-103 PLUNGER SPRING 1 94 883-405 O-RING (I.D 1.8) 1 95 886-621 PLUNGER 1 96 873-407 O-RING (1AP-5) 1 97 997-218 O-RING (S-6) 1 98 883-099 VALVE BUSHING (A) 1 GRIP RUBBER (A) 1 ROLL PIN D3 X 28 (10 PCS.) 4 99 100 12 - 09 949-865 *ALTERNATIVE PARTS REMARKS SUPPLIED WITH ITEM NO. 601, 602 -3- PARTS ITEM NO. NV 90HMC CODE NO. DESCRIPTION NO. USED 101 959-148 STEEL BALL D3.175 (10 PCS.) 1 102 882-923 LOCK SPRING 1 103 886-727 LOCK KNOB 1 CAUTION PLATE (C) 1 104 105 880-734 MACHINE SCREW (W/WASHERS) M5 X 25 (BLACK) 1 106 873-093 O-RING (1AP-3) 1 107 872-645 O-RING (P-9) 1 108 877-763 FEED PISTON O-RING (I.D. 14) 1 109 883-094 FEED PISTON 1 110 883-095 FEED SPRING (A) 1 111 883-096 FEED SPRING (B) 1 112 885-681 BUMPER 1 113 883-098 FEED PISTON COVER 1 114 983-748 RETAINING RING FOR D24 HOLE 1 115 883-368 HEX. SOCKET HD. BOLT M5 X 22 1 116 887-131 NOSE BUMPER 1 117 880-319 SHAFT RING 5 118 887-122 NOSE SLEEVE 2 119 887-125 NOSE SHAFT 1 120 887-132 URETHANE SHAFT 1 121 886-888 SPRING 1 122 886-887 NOSE PIECE (A) 1 123 887-130 GUIDE LOCK 1 124 880-446 SPRING 1 125 886-884 NAIL GUIDE 1 126 883-085 NAIL STOPPER (A) 1 127 883-088 STOPPER SPRING (A) 1 128 883-086 NAIL STOPPER (B) 1 129 883-087 STOPPER SPRING (B) 1 130 883-089 NAIL GUIDE COVER 1 131 886-885 COVER 1 132 882-881 SLEEVE (B) 2 133 880-630 NYLOCK HEX. SOCKET HD. BOLT M4 X 12 2 134 877-371 NYLON NUT M5 2 135 882-907 SLEEVE 1 136 886-891 PUSHING LEVER COVER (A) 1 137 886-906 MAGAZINE 1 LABEL (D) 1 139 887-175 WARNING LABEL 1 140 883-111 PIN 2 141 877-826 FEEDER SHAFT RING 2 142 886-907 MAGAZINE COVER 1 CAUTION PLATE (B) 1 144 881-003 HOLDER CAP (A) 1 145 880-503 NAIL HOLDER 1 146 880-398 RATCHET SPRING 1 147 949-423 WASHER M4 (10 PCS.) 2 148 995-474 TAPPING SCREW D3 X 14 1 149 887-123 HOLDER SHAFT 1 150 881-826 SPRING 1 138 143 -4- *ALTERNATIVE PARTS REMARKS 12 - 09 PARTS ITEM NO. NV 90HMC CODE NO. 151 DESCRIPTION NO. USED REMARKS NAME PLATE 1 152 887-174 WARNING LABEL 1 153 886-624 TRIGGER ARM ASS'Y 1 INCLUD. 65-67, 71 154 887-317 MAGAZINE ASS'Y 1 INCLUD. 137, 140-142, 144-150 12 - 09 *ALTERNATIVE PARTS -5- STANDARD ACCESSORIES ITEM NO. CODE NO. NV 90HMC DESCRIPTION NO. USED 501 883-136 PNEUMATIC TOOL LUBRICANT (30 CC) 1 502 875-769 SAFETY GLASSES 1 503 886-432 CASE 1 REMARKS OPTIONAL ACCESSORIES ITEM NO. CODE NO. DESCRIPTION NO. USED 601 881-768 GRIP TAPE (A) 1 602 880-407 TAPE 2 603 876-212 PNEUMATIC TOOL LUBRICANT (1 L) 1 -6- *ALTERNATIVE PARTS REMARKS Printed in Japan 12 - 09 (091211N)