Can anyone advise me on how to take apart an MTH HO Mohawk, catalogue number 80-3123-1? The smoke generator is playing up but MTH haven't done a parts diagram or exploded view of the loco which would be a big help. It's my first MTH so I'm in new territory and I don't want to cause any damage. All I've found so far is one screw under one of the boiler domes but I don't want to start dismantling it without knowing what I'm doing. I live in the UK but I haven't been able to trace an MTH HO repair service though the bigger scales are catered for.
Any help appreciated.
alfred atkinson