Hi all, as suggested I used some ptfe grease on the motor spindle and gears but the noise seems no less however I'm sure lubrication has done it no harm either, rather than taking the whole unit apart from what was visiual the commutator looked relatively clean. My trouble is the engine seriously lacks pulling power, sending the tender out solo on the track is fine, runs smooth, pushing the locomotive again relatively fine beyond this though is a definite no and adding any coaches results in a huge amount of protest. Thanks to Al here in particular, the 259c service sheet notes traction tyres which my tender did not come with, it seems to make alot of sense that I get some to test this theory out as i cannot seem anything else wrong would anyone agree this is worth a shot?. It is paining me slightly as I bought this as a xmas present for my 6 year old but it isn't delivering the joy it could and should be 😢 Cheers again for all your time people, with thanks, Sean