What are the main contents of truck crane maintenance

Truck crane. maintenanceIt mainly includes three major parts of the chassis (engine,Gearbox, front and rear axles), cranesHydraulicsmaintenance.

One. Truck crane introduction:

Truck-mounted crane, also known as truck-mounted crane transporter.

It is a kind of vehicle that realizes the lifting and turning of goods through hydraulic telescopic, widely used in construction, coal mines, warehouses, docks and other narrow places, composed of chassis, cargo boxes, cranes, etc., chassis of truck-mounted cranes, cranes as an important part of truck-mounted cranes, directly affecting the transportation and working performance of vehicles, due to the particularity of truck-mounted cranes, determines the functional diversity of truck-mounted cranes.

Two. Truck crane selection:

1..The chassis girder of the truck-mounted crane has a close relationship with the crane, before choosing the required crane tonnage, select the appropriate chassis, the larger the tonnage, the heavier the required chassis weight, the thicker the girder, the large tonnage crane with a small chassis, the girder is prone to fracture and rollover, and the small tonnage crane is equipped with a large chassis, and the lifting capacity of the crane cannot be fully utilized.

2.The size and tonnage of the chassis and crane can be selected according to the actual use needs.

3.According to the actual road conditions and operating environment, the corresponding engine can be selected, and in general, there are many mountain roads and powerful engines are required.

4.The cab can be equipped with air conditioning, more comfortable driving, navigation and ABS can be installed as needed, which is convenient and safe to travel.

5.The crane can choose a straight arm or a knuckle arm crane, the working radius of the straight arm crane is large, suitable for an open working environment, the knuckle boom crane has high work efficiency, it is suitable for installing all kinds of auxiliary equipment, and is widely used in warehouses, factories, docks and other places with small working space; The installation position can be selected in the middle and rear, the middle type is installed behind the cab, the selection of lifting position is convenient, generally speaking, the tonnage of the straight arm truck crane is relatively small, the choice of the middle type is more, the rear type is installed behind the cargo box, and the large folding arm truck crane generally chooses the rear type.

Truck crane.

The special vehicle for the truck crane is inspected and maintained every week.

Maintenance and inspection once a week, the contents of inspection and maintenance are as follows:

1) Check whether the nuts, cotter pins and positioning plates on the brake are complete and loose, the levers and springs are free of cracks, and whether the pins, bolts and buffer washers on the brake wheels are loose and complete; Whether the brakes brake is reliable. When the brake is opened, the opening of the brake pad should be less than and the distance gap between the two sides of the brake wheel should be equal, and the axle pins shall not be stuck.

2) Check whether the safety protection switch and the limit switch are accurately positioned, flexible and reliable, especially whether the rising limit is reliable.

3) Check whether the wire rope winding on the drum and pulley is normal, whether there is any de-groove, string groove, knotting, twisting and other phenomena, whether the wire rope pressing plate bolts are tightened, and whether there is a double nut anti-loosening device.

4) Check whether the fastening screws on the coupling sealing cover of the lifting mechanism are loose or shortage.

5) Check whether the transmission of each mechanism is normal and whether there is any abnormal sound.

6) Check whether the lubrication condition of all lubrication parts is good.

7) Check whether there are foreign objects on the track that hinder the operation of the bridge crane.

Maintenance and maintenance of truck crane: maintenance and inspection once a month, inspection and maintenance content in addition to the weekly content includes:

1) Check that the wear of the brake pad pad should not exceed 2mm, and the contact area between the pad and the brake wheel should not be less than 70%; Check the condition of the installation and fixation of each pin shaft and the wear and lubrication status, the wear of each pin should not exceed 5% of the original diameter, and the wear of the small shaft and mandrel should not be greater than 5% of the original diameter and the ovality is less than.

2) Check the wear of the wire rope, whether there is broken wire and other phenomena, and check the lubrication status of the wire rope.

3) Check whether the hook has cracks, and whether the wear of its dangerous section exceeds 5% of the original thickness; Whether the anti-loosening device of the hook nut is complete, and whether the various parts on the hook group are complete and reliable. The hook should rotate flexibly without jamming.

4) Check whether all bolts are loose and in shortage.

5) Check the bolt tightening of the base of the motor, reducer, etc., and tighten them one by one.

6) Check the lubrication status of the reducer, its oil level should be within the specified range, and measures should be taken to prevent leakage of the oil seepage parts.

7) Lubricate the gears.

8) Check the wear of the wire rope at the balance pulley, and lubricate the pulley and pulley shaft.

9) Check the condition of the pulley to see whether it is flexible, whether there is damage or cracks, and pay special attention to the wear of the fixed pulley shaft.

Ensure the normal working load of the small crane.

The size and nature of the working load of the small crane have an important impact on the loss process of the machinery. In general, the wear and tear of a part increases proportionally with the load. When a part is subjected to a load higher than the average design load, its wear will increase.

Reduce all kinds of corrosion effects of small cranes.

The phenomenon of chemical or electrochemical interaction between the metal surface and the surrounding medium and the destruction is called corrosion. This corrosive effect will not only affect the normal operation of the external equipment of the small crane, but also corrode the internal parts of the machinery. For example, rainwater and chemicals in the air enter the machinery through the external channels and gaps of mechanical parts, corroding the inside of mechanical parts, accelerating mechanical wear and increasing mechanical failures.

Reduce the impact of impurities on small cranes.

Small crane impurities generally refer to non-metallic substances such as dust and soil and some metal chips and wear products produced by construction machinery in the process of use. Once these impurities enter the inside of the machinery and reach between the mating surfaces of the machinery, the harm is great, which not only blocks the relative movement and accelerates the wear of the parts, but also scratches the mating surface, destroys the lubricating oil film, and increases the temperature of the parts and deteriorates the lubricating oil.

Reduce the effects of temperature.

In operation, the temperature of each component has its own normal range. For example, the temperature of the general cooling water is 80-90, and the temperature of the hydraulic oil of the hydraulic transmission system is 30-60.

Timely repairs. There will inevitably be a variety of failures in the process of using machinery. Among these faults, some faults may have a very small impact on machinery and equipment, and some are more serious, and even cause major accidents such as machine destruction and death. It is necessary to deal with it in a timely manner, and do not delay the maintenance time due to small faults and do not affect the use, resulting in greater failures.

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1.Under the normal operation of the truck crane, it should be overhauled at certain intervals (about a year) or overhauled once after the end of a construction period, replace worn bearings and other vulnerable parts, and repair at any time when problems are found.

2.During the operation of the wwinch, the truck crane observes and checks the function and wear of the brake, clutch and stopper at any time, and eliminates the fault in time.

3.The truck crane winch is not used for a long time, and then it should be carried out according to the newly installed construction winch or the inspection test method after overhaul, and when the construction winch is transported and maintained, it should be placed in a dry place, and the components should have good moisture-proof, anti-corrosion and other measures.

4.In the process of disassembly and assembly, pay attention to the matching surface should not be damaged, check the wear of the friction surface, the gear and bearing of each part, the wear of each rotating part and the connecting parts and the electrical components, etc., if it affects the use of the machine, it should be replaced in time.

5.Before checking the electrical equipment, the truck crane must turn on the power switch in advance, the electrical appliances must be kept clean, for which the dust, dirt, greasy, etc. must be removed regularly, the contacts are not allowed to have oil, the burned or oxidized contacts should be smoothed with fine sandpaper, the insulating ring is not allowed to be washed with gasoline, in order to prevent the contact surface of the armature core from rusting, it should be lubricated with machine oil regularly, and then wiped clean, and each section of the resistor cast iron sheet should be checked frequently to see if it is broken.

The maintenance of the truck crane should be checked and maintained from the following aspects:

Routine check-ups. The truck crane checks whether the connection and fixed seal of each pipeline are loose and leaking oil.

Check whether the fasteners of the truck crane are loose, and focus on whether the fasteners between the beam and the chassis girder, the slewing bearing and the beam and the column are reliable. The tightening torque of the inner and outer ring bolts on the slewing ring is.

Check whether the control switch and pressure gauge of the power take-off of the truck crane are normal.

Check whether the hydraulic oil and lubricating oil are sufficient.

Check the use of the wire rope and accessories, whether the rope is firm, and whether the wire rope is in the wheel groove. When the wire rope is discolored due to kinks, creases, abrasion, severe corrosion, more than 10% of the wire is broken or the diameter is reduced by more than 7%, and it is discolored due to overheating.

Check whether there is damage and deformation on the surface of each truck crane parts.

If the wire rope is found to be soft, the nut should be adjusted in time to tighten.

Make the truck crane in working condition, and check whether the sound and temperature of the hydraulic system are normal.

Maintenance and repair of truck-mounted cranes - small cranes.

1. The chassis shall be carried out according to the requirements of the original chassis truck instruction manual.

2. If there are rust spots or paint peeling off on the inner wall of the water tank, anti-rust measures such as rust removal and painting should be taken in time.

3. Please follow the instructions of the self-priming centrifugal pump for pump maintenance.

4. The maintenance and oil change of the power take-off are carried out at the same time as the main gearbox according to the instruction manual of the original chassis vehicle.

5. When the engine is out of service for a long time or the temperature is below 0, the remaining water in the engine, water pump, pipe network, etc. should be drained after each use to prevent freezing damage to the parts. After stopping use for a long time and reactivating it, it should be carefully checked to check whether the connection of each component is reliable, and whether the electrical control is flexible and reliable.

6. When the tank is filled with liquid for the first time, tighten the U-shaped bolt nut and connecting plate nut of the tank body once. During continuous work, the connecting parts should be checked regularly to eliminate the loosening of fasteners in time.

7. A more comprehensive inspection, cleaning and maintenance should be carried out on the high-pressure water pump and power take-off every year of work.