This guide covers the complete tool and battery.

Remove the 8 screws holding the two halves together.

Battery Contacts

Potted Circuit

Brushless Motor

Impact Gearbox

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

Neutral: Trigger Locked

Forward

Reverse

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

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.

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

20V battery at full charge

Nominally around 18.5V

Remove four screws to open battery

Spring for latch to lock battery into tool

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)