Makita DFT087F Repair Manual
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Makita DFT087F Repair Manual

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OFFICIAL USE
For ASC
CORDLESS SCREWDRIVER
DFT087F, DFT129F
REPAIR MANUAL
August 2022
Ver.1

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  • Page 1 OFFICIAL USE For ASC CORDLESS SCREWDRIVER DFT087F, DFT129F REPAIR MANUAL August 2022 Ver.1...

  • Page 2: Table Of Contents

    During USB communication.............................. 34 TORQUE CHECK MODE ................................ 34 17-1 How to use “Torque check mode”............................. 34 17-2 How to cancel “Torque check mode”..........................35 USING THE DEDICATED APP (MAKITA INDUSTRY TOOL SETTINGS) ................ 35 2 / 35...

  • Page 3: Caution

    1R479 Shockless hammer (Small) press-fitting Hex nut M3 (a component of Housing R) LUBRICANT AND ADHESIVE APPLICATION Description Amount Makita grease GA No.2 Apply a little unless specified in the figure. Lubricant No.101 a little Fig. 1 DFT129F TIGHTENING TORQUE SPECIFICATIONS...

  • Page 4: Repair

    REPAIR Bit sleeve section Disassembling 6-1-1 Fig. 2 Remove Ring spring 9 [1] with 1R003, 1R212-A and 1R212-B. Remove Flat washer 10 [2], Compression spring 10 [3] and Bit sleeve [4]. 1R003 1R212-A Fig. 3 Remove Steel balls 2.4 [2] (2 pcs) with a thin slotted screwdriver [1].

  • Page 5: Electrical Parts Section

     Change plate [2]  Compression spring 2 [3]  Switch lever [4]  Plate H (DFT087F)/Plate I (DFT129F) [5]  Clutch assembly 8M (DFT087F)/Clutch assembly 12M (DFT129F) [6] (Clutch assemblies can be removed by lifting up Gear assembly [7] and Motor section [8] slightly.)
  • Page 6 Fig. 10 Remove Gear assembly [2] and Rotor [3] from Housing R [1]. Fig. 11 Remove the following parts from Housing R [1]:  F/R change lever [2]  Lens, LED circuit [3]  LED circuit [4]  Stator [5] ...

  • Page 7: Assembling

    Assembling 6-2-2 Assemble Clutch assembly and Gear assembly. (6-3-2, 6-4-2) Fig. 14 Assemble Terminal unit [2] to Stator [1], then tighten Flat head screws M3x6 [3] (3 pcs) with a No.1 Phillips screwdriver. Note  Be careful not to strip the head of Flat head screws M3x6 [3] (3 pcs).
  • Page 8 Fig. 18 Assemble Clutch assembly 8M (DFT087F)/Clutch assembly 12M (DFT129F) [2] while lifting up Gear assembly [1] slightly, then assemble them to Housing [3]. Fig. 19 Assemble the following parts to Housing R [1]:  Change plate [2] Note Move Change plate [2] to Motor side.
  • Page 9 Fig. 21 Connect Connector if Unit (Herutu’s module) [1] is used. Assemble Cover [3] to Housing L [2] with Pan head screw M3x10 [4]. Fig. 22 Assemble O-ring 22 [1]. Fig. 23 Tighten Lock nut M28 black [2] to the specified torque by turning a 30mm socket [1] clockwise.

  • Page 10: Clutch Assembly Section

    Remove Adjust spring [3] by turning Lock nut M12 [2] (Left-handed) clockwise. Fig. 26 Remove Flat washer 18 [1] and Compression spring 19E (DFT087F)/Compression spring 19C (DFT129F) [2]. Fig. 27 Remove Steel balls 4 [1] (7 pcs), then remove Cam F [2].

  • Page 11: Assembling

    Fig. 28 Remove Steel balls 4 [1] (3 pcs) and Steel balls 5.0 [2] (3 pcs), then remove Cam D [3]. Assembling 6-3-2 Fig. 29 Assemble Cam D [2] to Spindle [1]. Note Apply the specified grease to the threads of Spindle [1].
  • Page 12 Fig. 32 Assemble Compression spring 19E (DFT087F)/Compression spring 19C (DFT129F) [2] and Flat washer 18 [3] to Spindle [1]. Fig. 33 Assemble Adjust ring [2] to Spindle [1]. Fig. 34 Screw Lock nut M12 [2] (Left-handed) to Spindle [1] by turning it counterclockwise.

  • Page 13: Gear Assembly Section

     Spur gears 18 (DFT087F)/Spur gears 14 (DFT129F) [4] (3 pcs)  Spur gear 20 complete A (DFT087F)/Spur gear 17 complete B (DFT129F) [5]  Spur gears 13 (DFT087F)/Spur gears 19 (DFT129F) [10] [6] (3 pcs) ...
  • Page 14 (DFT087F) Fig. 40 Assemble Spur gear 20 complete A [1], then assemble Spur gears 18 [2] (3 pcs). Note Apply the specified grease to the pins (3 pcs) of Spur gear 20 complete A [1] and the inner teeth of Internal gear 47 [3].

  • Page 15: Circuit Diagram

    CIRCUIT DIAGRAM Fig. 43 スイッチ回路図 AWG14 USB circuit AWG16 LED circuit B AWG22 Buzzer circuit Terminal Sensor circuit Flag receptacle with lock (#250, t=0.8) LED circuit A Flag receptacle with lock (#187, t=0.8) Sensor board Connector Terminal unit Connector for Herutu’s module Controller Switch Circuit diagram of Switch...

  • Page 16: Wiring Diagram

    WIRING DIAGRAM LED circuit section Fig.44 Rib A Sensor circuit Housing R F/R change lever LED circuit B USB circuit LED circuit A Place LED circuit B so that its lead wires come out from the bottom of Housing R. Route LED circuit A lead wires/Sensor circuit lead wires between Rib A and F/R change lever.

  • Page 17: Electrical Parts Section

    Electrical parts section Fig.45 LED circuit A Line filter Connector (for LED circuit A, LED circuit B, Sensor circuit, Sensor circuit USB circuit and Buzzer circuit) Stator Connector with Tape LED circuit B Protrusion of Controller USB circuit Space A Switch Controller Buzzer circuit...

  • Page 18: Models Those Housing L With Opening A

    Models those Housing L with Opening A Fig.46 Connector (3-pin/No connection) Housing L Opening A Space B Place Connector (3-pin/No connection) in Opening A. Pass Connector (3-pin/No connection) lead wires through Opening A. Be careful not to put Connector (3-pin/No connection) and Lead wires on this rib (hatched portion). Be careful not to put the slack of Connector (3-pin/No connection) lead wires on Space B.

  • Page 19: Troubleshooting

    10 TROUBLESHOOTING Whenever you find any trouble in your machine, first, see this list to check the machine for solution. 10-1 Note for Repairing The content may vary depending on the model. Use a full charged battery which has a star mark. When Housing is disassembled, check the conditions of the electrical parts (Connectors, Lead wires, Switches, etc.), Rotor, Stator, Gear section, etc.

  • Page 20: Check List For Troubleshooting

    12 CHECK LIST FOR TROUBLESHOOTING Check the items in the following flowchart in order from the top to bottom. Description of How to follow arrows each item is referred to CIRCUIT DIAGRAM. ∙ After corrective action, return to the start of Troubleshooting and re-check again. ∙...
  • Page 21 Symptom Corrective action What to check Auto battery shut-off system does See page 27. not work properly. • Rotation cannot be reversed. See page 27. • Rotation is in one direction only. Remarkable decrease in work See page 27. volume from a single charge. Battery cannot be charged.
  • Page 22 Symptom Probable Cause Corrective Action Motor shaft rotates without abnormal Replace broken gear(s) or Gear Gear assembly is broken. noise when Gear assembly is removed. assembly. Replace Rotor. Spur gear of Rotor is broken. Motor shaft does not rotate even though The remaining battery capacity is too Charge Battery.
  • Page 23 Symptom Probable Cause Corrective Action Replace Rotor. Rotor is broken. Occasionally no rotation. Connector of Switch is disconnected. Connect it securely. Switch is broken. Replace Switch. (Broken switch body, Connector or Lead wire) Connection between Lead wires and Replace Terminal. Terminal is loose, or Terminal is broken.
  • Page 24 Symptom Corrective Action Probable Cause The machine keeps rotating even after the clutch works. The continuous noise of the clutch Part(s) of the clutch section are works are recognized. Replace Clutch assembly. broken or worn out. Connectors of Sensor circuit on Gear assembly section are Connect Connectors.
  • Page 25 Symptom Probable Cause Corrective Action Poor torque precision The machine is in an overload work. Check the machine limit capacity. (The indicator lights up in red or blinks alternately in red and green.) Trigger switch has been released Keep on pulling Trigger switch until the before the clutch is disengaged.
  • Page 26 Symptom Probable Cause Corrective Action The check functions for Buzzer The function is restricted in the Check the setting. and LED indicator work properly setting of the dedicated app. when Battery is inserted. LED job light does not light up Battery is not charged.
  • Page 27 Symptom Probable Cause Corrective Action Auto battery shut-off system Battery is not charged. Charge the battery. does not work. Battery is inactive, broken or its service Replace Battery. life has expired. Check the machine limit capacity. The machine is in an overload work. Replace Controller.
  • Page 28 Symptom Probable Cause Corrective Action All charging lamps on the The charger is unplugged. Plug in the charger. charger do not light up. Power supply cord of the charger is Check Power supply cord with an broken. ammeter, and if there is no electrical continuity in it, replace it with a new one.
  • Page 29 Symptom Probable Cause Corrective Action Charging lamp on the charger Dust on the contacts of the battery or Remove the dust. lights up in red, then the charger. immediately start blinking in green. Connector(s) inside the charger are not Connect it securely. connected.
  • Page 30 Symptom Probable Cause Corrective Action USB communication does not The connector of USB circuit is Connect Connectors. work. disconnected. The machine is not recognized by the Restart the dedicated app. app. Loose connection of USB cable Reconnect it securely. USB cable is broken. Replace USB cable.

  • Page 31: Approximate Endurance Time Of Each Part

    13 APPROXIMATE ENDURANCE TIME OF EACH PART The time for replacing the parts DFT087F/DFT129F Part description Torque 8N∙m/12N∙m Turning angle 90° Clutch assembly Gear assembly Motor About 250,000 times Switch Terminal Other parts NOTE: The above values are approximate and may vary depending on the usage conditions.

  • Page 32: Main Features Of The Machine

    Electronic functions and Electronic reminders (See 16 LISTS OF THE ELECTRONIC FUNCTIONS AND REMAINDERS) Using the dedicated app Makita Industry Tool Settings, rotational speed Presetting function for variable rotational speed can be preset for various conditions. 15 SPECIFICATIONS OD BATTERY...

  • Page 33: Lists Of The Electronic Functions And Remainders

    16 LISTS OF THE ELECTRONIC FUNCTIONS AND REMAINDERS 16-1 When a screw is tightened completely or when there is no trouble with the machine: Indication Function Status Contents LED indicator Beeper Checking the followings: ∙ Indication lamp lights up in Lights up first in When Battery is installed.

  • Page 34: When Tightening The Tightened Screw Again

    Lights up Motor rotates abnormally. Continuous long Warning against Ask Makita service center. alternately in red Motor does not start even if beeps Malfunction of Motor and green. the trigger switch is pulled.

  • Page 35: How To Cancel "Torque Check Mode

    18 USING THE DEDICATED APP (MAKITA INDUSTRY TOOL SETTINGS) Additional functions such as "Presetting function for variable rotational speed" can be used with the dedicated app (Makita Industry Tool Settings). When setting up and using the dedicated app, follow the instructions in the instruction manual for the app.

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