A combine harvester comprises a clean grain holding bin (12) and an inclined unloading conveyor (56) having an upper discharge end locate laterally outwardly beyond a discharge side of the bin (12). The unloading conveyor includes an outer conveyor section (18) that is foldable relative to an inner section (72) of the conveyor from an unloading position in which the outer section is axially aligned with the inner section to a transport position in which the outer section is transverse to the inner section. The outer conveyor section (18) is adapted to separate from the inner conveyor section (72) at a point outboard of said discharge side (24) of the bin (12) when the outer conveyor section is folded toward said transport position. A catch basin (162) is provided to receive grain spilled from the point of separation of the inner and outer sections of the unloading conveyor and direct spilled grain back into the bin (12).
