Hydraulic winch is widely used in the repair car, it is an important feature, they can be used for lifting and towing tractor(for wrecker tow truck ), hydraulic winch from light to heavy have many specifications, the commonly used hydraulic winch has worm gear and worm and planetary gear reduction two kinds of structure, winch driven by hydraulic motor, through the reduction gear to achieve the purpose of the slow down and increase the output torque, so as to realize the relative overloading of capstan drawing ability, worm and worm wheel type hydraulic winch is relatively simple in structure, make easy, transmission efficiency and production costs are relatively low, generally used for MLJ hydraulic winch, and the planetary wheel type hydraulic winch structure is relatively complex, Large transmission ratio, transmission efficiency and production cost is relatively high, generally used in medium and heavy hydraulic capstan. On the repair car, hydraulic winch used mo...