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这个拆解是不是维修指南。 要维修你的的Dewalt Impact driver DCF840,请使用我们的维修手册

  1. Dewalt Impact driver DCF840 Teardown, Complete tool and battery: 步骤 1 中的图像 1,2 Dewalt Impact driver DCF840 Teardown, Complete tool and battery: 步骤 1 中的图像 2,2
    • This guide covers the complete tool and battery.

  2. Dewalt Impact driver DCF840 Teardown, Opening the tool: 步骤 2 中的图像 1,1
    • Remove the 8 screws holding the two halves together.

  3. Dewalt Impact driver DCF840 Teardown, Internal mechanism: 步骤 3 中的图像 1,2 Dewalt Impact driver DCF840 Teardown, Internal mechanism: 步骤 3 中的图像 2,2
    • Battery Contacts

    • Potted Circuit

    • Brushless Motor

    • Impact Gearbox

  4. Dewalt Impact driver DCF840 Teardown, Gearbox removed: 步骤 4 中的图像 1,1
    • With the Gearbox removed we are left with the motor on one side and the light ring on the other.

  5. Dewalt Impact driver DCF840 Teardown, Trigger mechanism: 步骤 5 中的图像 1,3 Dewalt Impact driver DCF840 Teardown, Trigger mechanism: 步骤 5 中的图像 2,3 Dewalt Impact driver DCF840 Teardown, Trigger mechanism: 步骤 5 中的图像 3,3
    • Neutral: Trigger Locked

    • Forward

    • Reverse

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

  6. Dewalt Impact driver DCF840 Teardown, Splitting the gearbox/impact section: 步骤 6 中的图像 1,1
    • 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.

  7. Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: 步骤 7 中的图像 1,3 Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: 步骤 7 中的图像 2,3 Dewalt Impact driver DCF840 Teardown, Gearbox / Impact section: 步骤 7 中的图像 3,3
    • 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

  8. Dewalt Impact driver DCF840 Teardown, Battery: 步骤 8 中的图像 1,1
    • 20V battery at full charge

    • Nominally around 18.5V

  9. Dewalt Impact driver DCF840 Teardown, Splitting battery case: 步骤 9 中的图像 1,1
    • Remove four screws to open battery

    • Spring for latch to lock battery into tool

  10. Dewalt Impact driver DCF840 Teardown, Battery details: 步骤 10 中的图像 1,2 Dewalt Impact driver DCF840 Teardown, Battery details: 步骤 10 中的图像 2,2
    • 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)

Wieli

于01/08/23注册

1,707 声望

创作了10篇指南

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