All good advice, thanks.
You wouldn't believe the hardship in removing parts when a vehicle has been on a firing range. A component will look fine, untouched, then in some out of the way place there is a small schrapnal mark that makes disasembly a nightmare. The bogie retaining collar looked fine, but on close inspection there was an impact that went right through to the shaft welding the whole thing together! Now I know there is a brass bush inside I have a warmer feeling about it all
The bogie is original and Loyds had the same part number as UCs, interestingly post war the Belgians must have used up old Windsor stock and the track and two wheels on each side are Windsor items! In the photo the right hand wheel is Windsor with the wider rim and push on tyre.