Problem w/Ballast Vehicle w/crane - update

[bob39520]

This is the Spectrum 16948. It is new out of the box. The motor gear (brass?) spin's but does not fully engage the large plastic drive gear.  In fact it just spins around most of the time. If I work it by hand it seems to engage just fine. Tightened all the body and motor mount screws, added extra weight and even held down the motor w/my finger - no real change. Everything looks O.K. and the plastic drive gear does not seemed stripped.
Any help or suggestions would be appreciated.

Bob Miller

I'm a little embarrassed on this one. The problem was dirty track, both my test and layout track. I am using the Ballast vehicle chassis as a base for a little fantasy car on my On30 layout. Even though all my On30 loco's are DCC w/sound, they run fine and the sound is consistent. The HO car could not get good contact - must be the big wheel sets on the On30. Cleaned the track w/acetone and the car works fine now.