oldhenry wrote:so what is the life of these items - with a proper driver and not overloaded van- but loaded up to the allowed load?
There must be a common 'average' .
i always reckon on 100K for a clutch, but I never had one of these 'throw-away' flywheel money-spinners for FMC.

I really dont see how you could anticipate the lifespan of something like that.
It would depend entirely on so many factors outside the bus and its payload. Is it a motorway vehicle/town vehicle? If town, is it a hilly one? Are the streets narrow and thus necessitating it to stop more often still? etc
The old Smiley Transit from my work was on 150,000 when sold and still afaik, had its original clutch Also, I got a 106 that withstood 150,000 miles on its factory clutch - but 80,000 of that was predominantly motorway mileage. Whereas, Ive known of failure from anywhere around 18K upwards!