Rusty Impact Driver Restoration | Makita 6919D

I found this impact driver from Japan recycle shop without a battery. It looks very old, but I believe that it will work after the restoration. I rebuild new battery with lithium cells 18650 and BMS 3S20A. It's designed to be different from the impact driver I've ever had, It's a little tricky to get it in pieces. You can see it in detail in the video. The problems with this tool are dirty, old grease, old paint, no battery, and no charger. * Impact driver information - Model 6919D - Electric motor DC magnet motor - Battery Nickel metal hydride battery - Voltage DC 12V - Rotation speed 0 to 2,600 min-1 (rotation / minute) - Number of hits 0 to 3,200 min-1 (times / minute) - Tightening torque maximum 110 N ・ m (1120 kgf ・ cm) M14 (Strength classification: 10.9) When tightening high-strength bolts for 3 seconds - Tightening ability Machine screw: M4 to M8, Ordinary bolt: M5 to M12 High-strength bolt: M5 to M10, Course thread: 22 to 120mm - Airframe