RE: RC Tank F.A.Q.
Q: How do I break in the metal gears in my Heng Long tank?
A: There are two ways to break in the metal gears. I will go over the quick and lazy way first:
1) Charge the battery pack and put fresh batteries into the transmitter.
2) Remove the tracks from the tank to lessen the load on the motors. I would also remove the drive sprockets.
3) Put the tank on a level surface.
4) Turn on both the tank and the transmitter.
5) If you have the smoke & sound transmitter, slide the throttle trim up. If you have the 2-speed transmitter, use a rubber band to hold the throttle stick up.
6) Let the tank run at low speed for an hour. Then shut it down and let things cool for 10 minutes.
7) Turn both the tank and the transmitter back on and run the motors in reverse at low speed for an hour. Then turn off the tank and let things cool for 10 minutes.
8) Turn both the tank and the transmitter back on and run the motors forward at low speed for an hour.
9) This concludes the lazy break in process.
Note that this is not the best way to break in the metal gears. The factory applied grease in the gears will prevent them from being fully broken in in this relatively short amount of time.