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Dewalt Impact driver DCF840 Teardown

Escrito Por: Wieli (y otro participante)
Publicado: January 29, 2023
  • Comentarios: 0
  • Favoritos: 1
  • Vistas: 740

Dewalt Impact driver DCF840 Teardown

Escrito Por: Wieli (y otro participante)
Publicado: January 29, 2023
  • Comentarios: 0
  • Favoritos: 1
  • Vistas: 740

Teardown

Introducción

Dewalt 1/4" Impact driver and battery teardown.

Este desmontaje no es una guía de reparación. Para reparar tu Dewalt Impact driver DCF840, utiliza nuestros manuales de servicio .

  1. Dewalt Impact driver DCF840 Teardown, Complete tool and battery: paso 1, imagen 1 de 2 Dewalt Impact driver DCF840 Teardown, Complete tool and battery: paso 1, imagen 2 de 2

    • This guide covers the complete tool and battery.

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  2. Dewalt Impact driver DCF840 Teardown, Opening the tool: paso 2, imagen 1 de 1

    • Remove the 8 screws holding the two halves together.

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  3. Dewalt Impact driver DCF840 Teardown, Internal mechanism: paso 3, imagen 1 de 2 Dewalt Impact driver DCF840 Teardown, Internal mechanism: paso 3, imagen 2 de 2

    • Battery Contacts

    • Potted Circuit

    • Brushless Motor

    • Impact Gearbox

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  4. Dewalt Impact driver DCF840 Teardown, Gearbox removed: paso 4, imagen 1 de 1

    • With the Gearbox removed we are left with the motor on one side and the light ring on the other.

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  6. Dewalt Impact driver DCF840 Teardown, Trigger mechanism: paso 5, imagen 1 de 3 Dewalt Impact driver DCF840 Teardown, Trigger mechanism: paso 5, imagen 2 de 3 Dewalt Impact driver DCF840 Teardown, Trigger mechanism: paso 5, imagen 3 de 3

    • Neutral: Trigger Locked

    • Forward

    • Reverse

    • When selector is neutral this tab keeps the trigger from being depressed

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  7. Dewalt Impact driver DCF840 Teardown, Splitting the gearbox/impact section: paso 6, imagen 1 de 1

    • Gear box fits into housing as a press fit with two clips. Releasing the two clips allows the gear box to be freed from its housing.

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  8. Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: paso 7, imagen 1 de 3 Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: paso 7, imagen 2 de 3 Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: paso 7, imagen 3 de 3

    • Planetary gear set: reduce motor speed and increase torque

    • Splines to gear box case

    • Internal teeth for planetary gear set

    • Spring (hard to see) for impact function: base spins and strikes output drive labeled with blue arrow in last picture

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  9. Dewalt Impact driver DCF840 Teardown, Battery: paso 8, imagen 1 de 1

    • 20V battery at full charge

    • Nominally around 18.5V

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  10. Dewalt Impact driver DCF840 Teardown, Splitting battery case: paso 9, imagen 1 de 1

    • Remove four screws to open battery

    • Spring for latch to lock battery into tool

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  11. Dewalt Impact driver DCF840 Teardown, Battery details: paso 10, imagen 1 de 2 Dewalt Impact driver DCF840 Teardown, Battery details: paso 10, imagen 2 de 2

    • 5 cells nominally 3.7V in series.

    • 0V (GND)

    • 12V (likely for LED light ring)

    • 3.7V (not connected to tool)

    • 18.5V

    • 18.5V (main output)

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Autor

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Wieli

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