The pictures above should help you identify which style of bearing you have in your locomotive. The first illustration shows a worm with a new style bearing on the left and an old style bearing on the right. Note that this is just for illustrative purposes – you shouldn’t mix old and new bearings within one locomotive.
- New Style Bearings;
The newer style bearings are characterised by having a flatter collar. The collar is the raised circle which encompasses the shaft hole. This can be seen quite clearly in picture 2. The collar of the bearing in question here, right at the end of the chassis, should always face inwards. It will not fit in the small recess behind the bearing.
- Old Style Bearings;
Picture 3 shows the old style bearing. This has a much more pronounced collar and is orientated in the opposite direction to the newer bearings – you can see that the collar is facing outwards and fits into the recess. It fits into the recess because it has a narrower collar than the newer bearings.