. Low Pressure Hydraulic Driven Slack Puller With A 2-Speed or 3-Speed That Can Be Shifted On The Fly.* Kohler Diesel Engines. Rotary Oil Pick-Up To ensure oil pressure when... motorized slack pullers. The spitter wheel does not turn until after it is engaged with the skidline. This eliminates "burnout" on your expensive drop line and costly carriage repairs... pulling carriage applications. At 1000 Lb. the model 10 can be utilized where other slack pullers are just too heavy. The exceptional light weight of the Model 10 adds to its performance...