The carriage crane is a kind of equipment which can realize the lifting, rotating and lifting of goods through the hydraulic lifting and stretching system.Manufacturers provide lorry-mounted crane product specifications in operation and maintenance, is essential information of the lorry-mounted crane operators operating equipment, before operating the machine, be sure to read the use of the lorry-mounted crane maintenance manual, operate according to the requirement of the specification and maintenance lorry-mounted crane.The maintenance requirements of the crane during the grinding period can be summarized as: reducing load, strengthening lubrication, strengthening training and paying attention to inspection.At the same time, the lubrication of each lubrication point of the truck crane should be strengthened, it is recommended to add grease to the lubricating point in each shift during the grinding period, except for special requirements.At this time, if the overload operation, it may lead to the damage of parts, causing early failure of the truck crane.2) : the lifting capacity (moment) of the crane is fixed, and the working radius of the crane is larger.(the working radius refers to the horizontal distance from the torque center to the hook.)The chassis is small, the power of the engine is small, which affects the lifting capacity of the crane.When considering a 250mm girder, consider a crane below 6 tons.For example, the rear eight wheels and the first four chassis can be considered under 10 tons of cranes. Feature: