This post is about problems about the LA. I myself have just carefully built the excavator and I'm having a lot of problems with the change over. I have replaced the the blue friction pin with the tan frictionless pin that come as an extra piece. I have replaced the yellow cog wheel like gears with two bevel gears ( I believe one is 12 tooth and the other is 24 tooth) so that I generate more torque yet I still have problems.
I can go to the 'boom' controls just fine, no problems at all, but it struggles to go to the 'track' controls. I took the motor out and manually tried to change over the gear. It still catches and I just can't see what is stopping the clutch gears from engaging, especially since it has no problems going to the boom controls even before I made any adjustments. I'm convinced its not a motor on a battery issue. I have stripped the back of the tractor apart to see if I could see anything causing the problem but while operating the tractor with missing pieces beams start to loosen up. So I'm scratching my head on this one. I will say after making the adjustments I mentioned, it has improved to about almost 50 percent of the time engaging, but still its annoying. I'm not sure what to do here.