In the middle of a PS pump rebuild (ZF 65bar) on my 240D and I have a crush washer left over that is driving me crazy. The kit came with 2 gaskets, both of which I used (rear seal, inner seal), 1 largish copper crush washer (outer 30mm nut with spring behind it) and a medium sized copper crush washer... I have no idea where it should go.

Help...

If you didn't remove the same sized crush washer, it probably isn't used on your pump. In general, some repair kits fit a few different devices and include parts for multiple versions.

It was such a fiddly rebuild... I'm a little paranoid after wrestling both the pulley and the rear cap.