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Koki Holdings NR 3665DA Service Manual

36 v cordless metal connector nailer
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PRODUCT NAME
36 V Cordless Metal Connector Nailer
NR 3665DA
Model
CONTENTS
TROUBLESHOOTING GUIDE -------------------------------------------------------------------------------------- 1
1. Troubleshooting and corrective action -------------------------------------------------------------- 1
2. Corrective action when the orange LED blinks --------------------------------------------------- 7
3. Maintenance mode -------------------------------------------------------------------------------------- 8
4. Resetting error mode (when the orange LED is blinking) -------------------------------------- 8
REPAIR GUIDE --------------------------------------------------------------------------------------------------------- 9
1. Precautions on disassembly and reassembly ---------------------------------------------------- 9
• Preparation before disassembly -------------------------------------------------------------------- 9
• Disassembly and reassembly of the magazine section -------------------------------------- 10
• Disassembly and reassembly of the output section ------------------------------------------- 15
• Replacement of the piston ass'y ------------------------------------------------------------------- 25
• Replacement of sensor ass'y (B) ------------------------------------------------------------------ 28
• Feeding compressed air ----------------------------------------------------------------------------- 29
• Checking after reassembly --------------------------------------------------------------------------- 31
• Tightening torque -------------------------------------------------------------------------------------- 31
• Connecting diagram ---------------------------------------------------------------------------------- 32
STANDARD REPAIR TIME (UNIT) SCHEDULES ------------------------------------------------------------ 33
CONFIDENTIAL
Overseas Sales Management Dept.
Mar. 2021
Page
N

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  • Page 1: Table Of Contents

    CONFIDENTIAL Mar. 2021 PRODUCT NAME 36 V Cordless Metal Connector Nailer NR 3665DA Model Page CONTENTS TROUBLESHOOTING GUIDE -------------------------------------------------------------------------------------- 1 1. Troubleshooting and corrective action -------------------------------------------------------------- 1 2. Corrective action when the orange LED blinks --------------------------------------------------- 7 3. Maintenance mode -------------------------------------------------------------------------------------- 8 4.

  • Page 2: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. Troubleshooting and corrective action Possible cause Problem Inspection method Corrective action (*: Most common cause) <Nails> Nails • Magazine is not loaded with • Check whether the magazine • Use specified nails. cannot be specified nails. is correctly loaded with •...
  • Page 3 Possible cause Problem Inspection method Corrective action (*: Most common cause) • No compressed air in the • Fill up the nailer with • Supply compressed Nails nailer compressed air, leave the air. cannot be • Compressed air leak nailer still for one day, and •...
  • Page 4 Possible cause Problem Inspection method Corrective action (*: Most common cause) • No compressed air in the • Fill up the nailer with • Supply compressed Nails cannot nailer compressed air, leave the air. be driven • Compressed air leak nailer still for one day, and •...
  • Page 5 Possible cause Problem Inspection method Corrective action (*: Most common cause) • Unwanted objects (e.g., dust, • Load nails in the nailer and • Remove unwanted Nails jam. wood dust, adhesives) in the check that the nailer works objects (e.g., dust, nail guide groove of the normally.
  • Page 6 Possible cause Problem Inspection method Corrective action (*: Most common cause) • Dry-fire lockout mechanism is • Count the number of • Load nails. No nailing activated. remaining nails. There operation should be 6 or more without remaining nails. motor *•...
  • Page 7 Possible cause Problem Inspection method Corrective action (*: Most common cause) *• Broken movable part that • Check the movable part for • Replace defective No nailing disabled nailing work. any trouble (e.g., parts. operation deformation, break, with the excessive wear). orange LED •...

  • Page 8: Corrective Action When The Orange Led Blinks

    2. Corrective action when the orange LED blinks Orange LED lighting pattern Possible cause Corrective action • Reversed magnet polarity of position detector • Sensor (C) failure or Power switch is automatically turned off after • Replace defective parts. disconnection about 10 seconds.

  • Page 9: Maintenance Mode

    3. Maintenance mode The maintenance mode is used to move the piston down to the bottom dead point in preparation for feeding compressed air or overhauling the nailer. To switch to the maintenance mode, hold down both the power switch and the maintenance switch for at least five seconds. NOTE: The maintenance switch is hidden under the operation panel.

  • Page 10: Repair Guide

    REPAIR GUIDE The Model NR 3665DA mainly consists of two sections: the output section and the magazine section. The most essential precautions on disassembly and reassembly of the Model NR 3665DA are described below. 1. Precautions on disassembly and reassembly [Bold] numbers in the description below correspond to the item numbers in the parts list and exploded assembly diagram for the Model NR 3665DA.

  • Page 11: Disassembly And Reassembly Of The Magazine Section

    Disassembly and reassembly of the magazine section 1. Disassembly • Remove the Nylock Bolt (W/Flange) M5 [82] that fastens the magazine ass'y to the Housing Ass’y [50] and two Nylock Bolts M5 x 22 [35] that fasten the magazine ass'y to the Nose [18]. •...
  • Page 12 2. Reassembly Reverse the disassembly procedure to reassemble. Note the following points. • Mount Spring (A) [89] on Nail Support (A) [90]. Insert Nail Support (A) [90] into the groove of Blade Guide (B) [88] and insert the Needle Roller D3 x 22 [87] into the hole of Blade Guide (B) [88]. Fig.

  • Page 13: Disassembly And Reassembly Of The Probe And Pushing Lever (A)

    Disassembly and reassembly of the probe and pushing lever (A) 1. Disassembly • Remove Housing (C) [48] and magazine ass'y referring to page 9 to 10. • For safety, push the valve core once more and check that compressed air is completely released and the Piston Ass'y [16] is lowered to the bottom dead point referring to "Feeding compressed air"...
  • Page 14 • Set the lock lever to the lock position to lock the trigger for Fig. 11-1 safety (Fig. 11-1). Lock lever • Mount the battery and adjust the Adjuster [42] according to the following procedure (Figs. 11-2 and 11-3). Press the Probe [45] against the 5.2 mm groove of the J-409 push lever gauge. NOTE: Prevent the tip of the Piston Ass'y [16] from contacting the J-409 push lever gauge (Fig.
  • Page 15 Fig. 11-3 [42] [44] Power switch Operation panel 5.2 mm groove (4.5 mm groove) J-409 push lever gauge The tool is powered on while this LED is lighting. Fig. 12 5.2 mm groove 4.5 mm groove J-409 push lever gauge (Code No.

  • Page 16: Disassembly And Reassembly Of The Output Section

    Disassembly and reassembly of the output section 1. Removal of the power assembly and wiring • Housing Ass’y [50] consists of two halves: housing (A) with a metabo HPT logo mark on its surface and housing (B). • For safety, push the valve core once more and check that compressed air is completely released. •...
  • Page 17 2. Disassembly of the power assembly NOTE: • See pages 25 to 27 for replacement of only the Piston Ass'y [16]. • Put alignment marks on the Chamber Base Ass’y [11] and Cylinder [5] as shown in the figure below before disassembly to indicate the coupling positions. Fig.
  • Page 18 • Remove the valve core from the Chamber Base Ass’y [11] by using a commercially available valve core tool. (See Fig. 16.) Fig. 16 Bit type Tip shape • Remove the four Nylock Bolts M6 [12] that fasten the Chamber Base Ass’y [11] and Chamber Cover [4], and remove the Chamber Base Ass’y [11].
  • Page 19 Fig. 20 J-400 Repair tool number "J-400" J-400 special socket (Code No. 372798) Fit the claws of the J-400 special socket in the notches on the Cylinder [5] (4 places). • Apply 0.5 g or more oil to the top and bottom of the Special Nut M58 [13] all around. •...
  • Page 20 • Remove Pushing Lever (B) [40] and Pushing Lever Spring (B) [37]. • Remove the Special Bolt M6 [38] and Adjuster [42] from Pushing Lever (B) [40]. • Remove the two Nylock Bolts (W/Flange) M4 x 14 [36] and one Nylock Bolt (W/Flange) M4 x 25 [27] from the Nose [18], then remove Blade Guide (A) [86].
  • Page 21 • Put the Pin Wheel [28] in the Nose [18]. Facing the notch of the Pin Wheel [28] to Blade Guide (A) [86], push the Piston Ass'y [16] down to the bottom dead point without meshing with the eight Needle Rollers D4 [33] and Needle Roller D4.5 [24] as shown in Fig.
  • Page 22 • Apply Molub-Alloy 777-1 grease to the following area on the Nose [18] and then mount Pushing Lever (B) [40]. Fig. 25 Apply grease here. • Be sure to check Sensor Ass’y (B) [39] according to page 24 after reassembling the power assembly. •...
  • Page 23 • If it is difficult to mount the Gear Box Ass’y [79] due to improperly meshed gears, turn the Rotor [80] by hand so that the gears are properly meshed. • Push the wires in housing (A) of Housing Ass’y [50] with a flat-blade screwdriver being careful not to damage the coating as shown in Fig.
  • Page 24 • Check that the wires are not caught and there is no clearance between housings (A) and (B) when putting them together. Fig. 29 • After reassembly, check that the terminal of the Wiring Ass’y [60] is properly mounted without mismatch and it is slightly movable as shown in Fig.
  • Page 25 4. Checking after reassembly of the power assembly • Check that Pushing Lever (B) [40] moves smoothly without any catch. • Connect Sensor Ass’y (B) [39] and Sensor (C) [67] to the Wiring Ass’y [60], and connect the terminal to Housing (D).(E).(F) Ass’y [51].

  • Page 26: Replacement Of The Piston Ass'y

    Replacement of the piston ass'y NOTE: When replacing only the Piston Ass'y [16] with new one, also replace the Needle Roller D4.5 [24] mounted in the Pin Wheel [28] with new one included in the brand-new Piston Ass'y [16]. 1. Disassembly •...
  • Page 27 • Check that compressed air is completely released. Then remove the four Nylock Bolts M6 [12] from the Chamber Base Ass’y [11] and Chamber Cover [4] to remove the Chamber Cover [4]. NOTE: If it is difficult to remove the Chamber Base Ass’y [11], temporarily tighten at least two Nylock Bolts M6 [12] so that the threaded portion is shown 3.5 mm to 6.5 mm as shown in Fig.
  • Page 28 Fig. 36 Pay special attention to the position of the Position Detector [23]. If the Position Detector [23] is misaligned, the standby position of [23] the piston is also misaligned. Notch Notch [28] • Remove dust from between the Pin Wheel [28] and Needle Roller D3 [31] and apply about 1.5 g of Molub- Alloy 777-1 grease to the Needle Roller D3 [31], eight Needle Rollers D4 [33], and Needle Roller D4.5 [24] evenly.

  • Page 29: Replacement Of Sensor Ass'y (B)

    Replacement of sensor ass’y (B) • Remove Housing (C) [48], magazine ass'y, and Top Cover [2] to take out the power assembly referring to pages 9 to 16. • Remove the Nylock Hex. Socket Hd. Bolt M3 [69] from the Nose [18], then remove Guide Plate (P) [68]. •...

  • Page 30: Feeding Compressed Air

    Feeding compressed air CAUTION: • Be sure to switch to the maintenance mode (see page 8) and move the Piston Ass'y [16] down to the bottom dead point before feeding or discharging compressed air. • Be sure to use the specified reduction valve set when feeding compressed air. •...
  • Page 31 • Push the valve core and check that no compressed air is left. • Apply lubricant to the O-ring (S-5) (Code No. 872822) of the charge screw. Always replace a defective O- ring with a new one. • Screw in the charge screw into the pressure feeding port of the Chamber Base Ass’y [11]. Fig.

  • Page 32: Checking After Reassembly

    Checking after reassembly • Check that no nail is loaded in the magazine. • Check that Pushing Lever (A) [44] moves smoothly without any catch. • Check that the Probe [45] and Nail Support (B) [93] are surely mounted and there is no defect. •...

  • Page 33: Connecting Diagram

    Connecting diagram Fig. 45 Tact switch PCB ass'y Battery terminal Yellow Trigger Sensor PCB switch Black ass'y White Push switch Black Main PCB ass'y Blue Pin wheel switch Black -32-...

  • Page 34: Standard Repair Time (Unit) Schedules

    STANDARD REPAIR TIME (UNIT) SCHEDULES Repair Model time 60 min. Work Flow NR 3665DA Adjuster Pushing Lever (B) Pin Wheel Magnet Position Detector General Assembly Pushing Chamber Blade Top Cover Lever (A) Cover Guide (A) Housing (C) Probe Chamber Sensor...
  • Page 35 105 106 107 M O D E L NR3665DA Rev.1...
  • Page 36 ITEM CODE DESCRIPTION REMARKS USED 372298 HEX. SOCKET HD. BOLT M6 372296 TOP COVER 371012 RUBBER CUSHION (C) 372337 CHAMBER COVER 372335 CYLINDER 372336 O-RING (I.D 55.5) 372334 O-RING (I.D 94.5) 376085 CHARGE CAP 872822 O-RING (S-5) 371038 VALVE CORE 372388 CHAMBER BASE ASS'Y INCLUD.
  • Page 37 ITEM CODE DESCRIPTION REMARKS USED 377439 CAUTION LABEL 376086 CAUTION LABEL 374602 PINION (B) 376547 MOTOR SPACER 372353 CAP NUT M3 376546 GEAR BOX ASS'Y INCLUD. 65, 66, 76, 77 361071 ROTOR 377448 MAGAZINE COVER (B) 372354 NYLOCK BOLT (W/FLANGE) M5 372347 MAGAZINE PLATE 377449 NAIL RAIL 377447 MAGAZINE COVER (A)

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