This excavator was bought probably 10-15 years ago but was not used because a few gears were broken. Now with a 3D-printer I returned it to life :)
I made only 3 gears that were broken:
GearA: 36T-D30 / 12T-D14
GearB: 12T-D11
GearC: 36T-D30 / 10T-D9.5
The gears were printed with PETG and proved to be working fine:
The author marked this model as their own original creation.