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This SAE Standard includes only those towing winches commonly used on skidders and crawler tractors. These winches are used on self-propelled machines described in SAE J1057, J1116, and J1209. Specifically excluded are those winches used for hoisting operations.

This SAE Standard includes names of major components and parts particular to this type of machine. Illustrations used here are not intended to include all existing commercial machines, or to be exactly descriptive of any particular machine. They have been chosen to describe the principles to be used in applying this document (see Figures 1 and 2). 1 Engine 2 Sweep 3 Operator Enclosure 4 Seat 5 Rear Frame 6 Winch 7 Arch 8 Fairlead 8(a) Main Fairlead Roller 8(b) Auxiliary Fairlead Rollers 9 Tire 10 Rim 11 Axle 12 Driveline 13 Steering Cylinder 14 Front Frame 15 Blade Arm1 16 Blade 17 Decking Lug 18 Blade Cylinder 19 Radiator 20 Log Bumper

This SAE Standard includes names of major components and parts peculiar to this type of machine. Illustrations used here are not intended to include all existing commercial machines or be exactly descriptive of any particular machine. They have been provided to describe the principles to be used in applying this document.

This SAE Standard is intended to describe the basic types of felling heads, including those with bunching capabilities, that are attachments to a self-propelled machine. Only the major components that are necessary to describe the functions of the felling head, and to apply the principles of the standard are included. Illustrations used are not intended to include all existing felling heads or to describe any particular manufacturer’s variation.