25T China XCMG QY25K Used Truck Crane 25k-1 / 25k-2 Crane Imported Brands Direct Deal Mechanical product

Maintenance of specific parts of crane

1. Maintenance and repair of transmission mechanism

Check whether the fixing device of wire rope meets the requirements, and check whether there are corrosion, broken wire, loose strand, broken strand, bending, kink, wear, flattening and other phenomena. If it exceeds the relevant regulations, it must be replaced immediately; check whether the hook has defects such as section wear, peeling, crack, torsion deformation, increase of opening, and whether the relevant pin shaft and sleeve have serious wear; Check whether the pulley is equipped with anti off rope groove device, whether the pulley rotates flexibly, and whether the pulley rope groove and rim have broken edges, wear, cracks and other conditions.

2. Maintenance and repair of brake device

Check whether there is noise and heat dissipation during the operation of the mechanism; check and adjust the clearance between the brake pad and the brake wheel; check whether the spring and pull rod of the brake have fatigue deformation, cracks and other defects; check the lubrication of the gearbox, reducer, external gear and other parts and whether the hydraulic oil leaks; check whether the oil filter is blocked frequently, Whether the safety valve is adjusted after use, whether the adjustment of the brake surfaces of the brake is not necessary, and the dirt must be washed with gasoline or thinner. Check whether the wheel tread and axle are fatigue cracks, whether the wheel tread shaft wear is exceed the standard, and whether there is gnawing phenomenon in operation.

3. Maintenance and repair of metal structure

During use, it is necessary to regularly check the main stressed components for overall or local fatigue deformation, looseness, instability, serious corrosion, crack, damage, etc., try to prevent component deformation and collision damage during transportation, check the connecting bolts or rivets, especially the vibrating parts for looseness, defect and other defects, and check the structural connection and weld for obvious deformation and cracking.

4. Maintenance and repair of electrical system

Clean the dust and dirt on the electrical equipment in time to ensure the cleanness of the distribution box, control box, brush and its contact surface; regularly check all cables and wires for damage, and timely wrap or replace the damaged parts; ensure the reliable opening and closing of the contact of the travel switch of each safety device, and timely polish the contact crater; Check whether short circuit protection, loss of voltage protection, zero position protection, over-current protection and overspeed and loss of excitation protection are set for crane power supply and various mechanisms.

5. Maintenance and repair of safety protection device

Check whether the installation of overload protection device, buffer, moment limiter, limit position limiter, anti back tipping device, wind proof device and protective device of the crane meet the design requirements, whether the operation of these devices is sensitive and reliable, whether the alarm signal can be sent in time if it exceeds the specification, and whether the power source running in the dangerous direction can be automatically cut off.

Parameter configuration of XCMG QY25K Crane

Lifting capacity

Dynamic System

Body size

Shanghai LONGHUA CONSTEUCTION MACHINERY Co., Ltd.

Spot sales of 5000 sets of used machinery and equipment, excavators, forklifts, bulldozer, cranes, loaders, graders, road rollers and other construction machinery.
Sales of excavator brands: Komatsu, Carter, Hitachi, Shengang, Doosan, Volvo, Hyundai, Kubota, Sany, Sumitomo, Kato, etc