Tramcar narrow-gauge railway transport vehicle mines transport coal, ore and waste rock and other bulk materials, large-scale transport tub, generally required traction locomotive or winch. Harvesters basic components: the connector is part involve significant safety issues, "Coal Mine Safety Regulations" of the connector has strict rules. Connecting shackle, the safety factor and the connection latch means endless rope transport carts are not less than 6. Rope safety factor on connection means endless rope transport of not less than 8. Tramcar narrow-gauge railway transport vehicle mines transport coal, ore and waste rock and other bulk materials, large-scale transport tub manufacturers, are generally required traction locomotive or winch. Harvesters inspection standards: wheel right. With one pair of two tread difference in diameter must not exceed 2mm. Bearings, single row radial ball bearing wear, the radial clearance must not exceed 0.5mm. With one pair of old bearings should not be mixed. Overhaul tub can not use the old bearings.