Sinking winch repair and maintenance: In order to make sinking winch to normal operation, inspection and maintenance system should be established jz series sinking winch Hebei, Shandong coal mine should set Conservation Group jz series sinking winch, mine car inspection and maintenance. Always check daily basis. Repair of checks, once a month. Frequent maintenance, once a month. Harvesters also regular checks: Check the fastener bolt is loose. Mine shaft sinking winch performance: winch should operate smoothly Inner jz series sinking winch, no periodic noise. Winch control system should be flexible, accurate and reliable. Rope maximum static tension should be consistent with the provisions and winch measured at rated load should not exceed the rated power of the motor power of the motor. Rope speed should be specified, tolerance is ± 20%.