CERTIFICATION 2802071 - Caterpillar

The Clark winch is mechanically driven. Several hydraulic and mechanical components control the operation of the winch.The 'Input Clutch' delivers engine power to the cable drum through all other winch drive components.The 'Pinion Brake' stops the drum from rotating after you wind in the cable without a load. This feature allows better drum control.The 'Pinion Sprag' holds the load in conjunction with the free spool clutch, this prevents reverse rotation of the drum.The 'Free Spool Clutch' separates the drum from all other drive components. This permits the cable to unwind freely.The operator controls the winch through a single lever and control valve with three positions.The 'winch in' position permits the valve to actuate the 'input clutch.' For the purpose of safety, the lever will not remain in the 'winch in' position when released by the operator.The 'neutral' or center position actuates the pinion brake.The 'free spool' position permits the valve to actuate the free spool clutch and release the drum to rotate freely. This position includes a detent which holds the lever in the free spool position when released by the operator. This feature permits the operator to get off the machine and pull the cable off the drum.