Hello. My name is Mark and I will be assisting you today.
The vans that suffer from this type of failure are ones that are either poorly serviced or have been mis-fuelled with petrol and then have the engine started.
It isn't actually the bearings that break up. It is the coating on the pump gears that wear due to lack of lubrication.
Allowing the vehicle to run out of fuel can also cause this type of failure.