John-1263500 Posted October 23, 2022 Share Posted October 23, 2022 Hi, I have a Hogwarts Express Princess Royal Class engine. I’ve had an issue with the worm drive not engaging. Further examination I’ve found the cover for the motor worm wheel isn’t securing as the small screw seems to be stripped or the hole is stripped. Can anyone suggest a solution to this please ?Thank you Link to comment Share on other sites More sharing options...
ColinB Posted October 23, 2022 Share Posted October 23, 2022 Generally I drill the hole with a 1.6 mm drill so it is deeper and then tap the hole with a m2.0 tap, then use an m2 longer screw. It is a dumb idea to use a self tapping screw on a critical piece of the mechanism, I think on later Hornby models, they realised their mistake and did the same. Link to comment Share on other sites More sharing options...
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