a tracked chassis

a feed system mounted to the chassis for accepting material to be screened;

means for moving the feed system upwards from a substantially horizontal transport position with respect to the chassis to an inclined working position at an angle to the chassis and from the inclined position downwards to the substantially horizontal position;

a screen box supported on the chassis for accepting material from the feed system, wherein the screen box comprises a first deck for screening any material fed thereinto, whereby material of relatively finer and coarser fractions is adapted respectively to pass through the first deck and across the top of the first deck,

a first folding conveyor mounted on the chassis beneath the screen box and feed system to receive fines material passing through the first deck of the screen box and to convey same away from a first end of the apparatus; and

a second folding conveyor mounted on the chassis and associated with the screen box to receive the coarser material from the top of the first deck and to convey same away from a second, opposing end of the apparatus;

wherein the first folding conveyor comprises a tail section located beneath the screen box and feed system, a mid-section pivotally attached to the tail section and a head section pivotally attached to the mid-section, the head section comprising a free end from which material is discharged,

wherein the feed system is located between the screen box and the head section free end.