Hi Rob,
No I won't over tighten the screws. When I took the body off, both bogeys seemed very loose, so starting with the driver end I was able to turn the screw 2 or 3 turns before I felt it nip. However when I tried to tighten the other bogey (it was very loose also), I was able to turn the screw 4 or 5 turns !, so on inspection I noticed that the screw head was disappearing / screwing itself down into the screw hole in metal body of the loco. It appears that there is no machined lip in the metal body that will contact with the underside of the screw head...i.e. the body screw hole is just a vertical hole with nothing to stop the whole screw going up & down in it.
I have yet to remove this 2nd bogey, spent the evening cleaning the 1st one, what a mess, Bachmann did not spend much time cleaning the gears/cogs out of old grease.
The drive shaft - someone mentioned in this long thread, that to ensure easy re-connection, they turn the shaft (and presumably the motor end coupling) to be at 6 / 12 o'clock. Unfortunately my motor & drive shaft have separated almost horizontally, so I am worried about re-connection. Any ideas on how to turn the motor to the 6/12 vertical position ?
Thanks,
Peter