Recently I decided to do some in depth maintenance on my locos, and it can be frightening to find things that need fixing. On removing the rotary valve cover on my Silver Link, which was actually running ok, I discovered the rotary valve had a deep concentric groove worn in it from the compression spring, the wear pad, what was left of it, served no purpose at all. Needless to say, a new valve, pad and gasket was fitted.
Elsewhere, other inspections found the wires to the wiper board were only held in place by the 'Grace of God': Age and the constant heating and cooling had takin it's toll, the wires were only attached by a couple of strands.
In general taking time to check all the screws for their tightness is also worthwhile.
Hi Chris, How old is the cover?? The earlier printed covers were printed in Pet-g and we have changed to ABS as it is more stable. Nothing, even hornby originals wil resist the higher temps caused due to an electrical issue. When you make your next parts order, I will include a replacement for you.