A wood chipper (10), shredder for brushwood or combined wood chipper and shredder for brushwood having a body (12), a first and a second arm assembly (30,32), and a first and a second track assembly (26,28), the first and second track assemblies being carried by the first and second arm assemblies respectively, the first and second arm assemblies being mounted to the body, the first arm assembly being adjustable with respect to the body by way of a first actuation means so as to enable the ground clearance of the body and the separation of the track assemblies to be varied independently. A wood chipper, shredder for brushwood or combined wood chipper and shredder for brushwood having a body, a track assembly and a track mount, the track mount serving to mount the track assembly to the body, the track mount being arranged outboard of the track assembly
