In the cold winter months, proper maintenance of truck-mounted cranes is essential to ensure their reliable operation and longevity. Here are the eight crucial aspects of correct and effective maintenance for truck-mounted cranes.
Check whether the trademark and logo of the truck-mounted crane are complete.
The packaging of genuine truck-mounted crane products is of high quality. The handwriting on the box is clear and distinct, and the overprinted colors are vivid and vibrant. On the packaging box and bag, essential information such as product name, specification model, quantity, registered trademark, factory name and address, telephone number, and more should be clearly marked. Some manufacturers also mark their own unique logos on the accessories. This not only helps in brand identification but also serves as an indication of authenticity.
For some important parts like generators, distributors, and fuel injection pumps, they are often equipped with operation manuals, certificates of conformity, and inspector stamps. These additional items are crucial as they guide users in the correct use and maintenance of these vital components. When purchasing truck-mounted crane parts, it is essential to carefully identify these markings to prevent buying counterfeit and shoddy products.
Counterfeit parts can pose significant risks to the performance and safety of the truck-mounted crane. They may not meet the required quality standards, leading to premature wear and tear, reduced efficiency, and even potential breakdowns. For example, a counterfeit generator may not provide stable power output, which can affect the operation of other electrical components on the crane. A fake fuel injection pump may not deliver the correct amount of fuel, resulting in poor engine performance and increased fuel consumption.
To ensure that you are purchasing genuine parts, it is advisable to buy from authorized dealers or reputable suppliers. Look for trusted brands with a good reputation in the market. Additionally, compare the packaging and markings of the parts with those of known genuine products. If in doubt, contact the manufacturer or their customer service for verification.
Check whether the joint parts are flat.
During the handling and storage of truck-mounted crane parts, due to vibration and collision, burrs, indentations, damages, or cracks often occur at the joint parts. These imperfections can significantly affect the use of the parts and potentially lead to problems during operation. When purchasing truck-mounted crane parts, it is crucial to pay close attention to the inspection of these joint parts.
For example, a joint with burrs can interfere with the proper fit and alignment of components, leading to increased friction and wear. Indentations or damages can weaken the structural integrity of the part, making it more prone to failure under stress. Cracks can develop into serious fractures over time, potentially causing catastrophic failures.
To check for flatness, carefully examine the joint surfaces using a magnifying glass or a precision measuring instrument if possible. Look for any signs of irregularities, such as bumps, dents, or scratches. Ensure that the joint surfaces are smooth and even, with no visible defects. If any issues are found, it is advisable to avoid purchasing the part and look for an alternative that is in better condition.
Check whether there is rust on the surface of the parts.
The surface of qualified truck-mounted crane parts has both a certain level of precision and a bright, smooth finish. The more important the part, the higher the precision required, and the stricter the packaging for rust prevention and corrosion protection. When purchasing parts, it is essential to pay close attention to inspection for rust.
Rust can occur due to exposure to moisture, humidity, or other corrosive elements. It can quickly degrade the quality and performance of the part. For example, rust on a metal surface can weaken the structure and lead to reduced strength and durability. In some cases, rust can also interfere with the proper functioning of moving parts or cause electrical malfunctions.
If rust spots, mildew spots, or cracks in rubber parts are found, they should be replaced. Rubber parts are particularly susceptible to damage from moisture and temperature changes. Rust spots on rubber can indicate deterioration and potential failure. Similarly, if there are obvious turning marks on the journal surface, it may indicate improper handling or wear and should also be replaced.
To prevent rust formation, proper storage and maintenance are essential. Keep parts in a dry and well-ventilated area. If possible, use rust inhibitors or protective coatings to protect metal surfaces. Regular inspection and cleaning can also help detect and remove any early signs of rust before it becomes a major problem.
Check whether the protective surface layer is intact.
Most parts of truck-mounted cranes are coated with a protective layer when leaving the factory. This protective layer serves to prevent corrosion, rust, and damage during transportation and storage. For example, piston pins and bearing shells are often protected by paraffin. The surfaces of piston rings and cylinder liners are coated with antirust oil and wrapped with packaging paper. Valves, pistons, and other parts are immersed in antirust oil and then packaged in plastic bags.
When purchasing truck-mounted crane parts, it is crucial to check whether the sealing sleeve is damaged, the packaging paper is lost, or the antirust oil or paraffin is lost. If any of these conditions are found, it should be returned or exchanged. A damaged protective layer can expose the part to moisture, air, and other elements that can cause corrosion and damage.
For instance, if the paraffin coating on a piston pin is damaged, it can lead to rust formation and affect the fit and performance of the pin. Loss of antirust oil on piston rings can cause them to corrode and lose their sealing ability. Therefore, ensuring the integrity of the protective layer is essential for maintaining the quality and performance of the parts.
Check whether there is any deformation in geometric dimensions.
Some truck-mounted crane parts are prone to deformation due to improper manufacturing, transportation, or storage. Deformation can affect the fit and function of the parts, leading to problems during operation. During inspection, roll the shaft parts along a glass plate for a circle. See if there is any light leakage at the joint between the parts and the glass plate to judge whether it is bent.
For example, a bent shaft can cause vibrations and uneven wear in the associated components, reducing the efficiency and lifespan of the crane. When purchasing the steel plate or friction plate of the clutch driven disk, hold the steel plate and friction plate in front of the eyes to observe whether it is warped. A warped plate can lead to clutch slipping or uneven engagement, affecting the transmission of power.
When purchasing oil seals, the end face of oil seals with frameworks should be circular and can be attached to the flat glass without warping. The outer edge of oil seals without frameworks should be straight. Hold it with your hand to deform it, and it should return to its original state after releasing. Deformed oil seals can result in oil leaks and damage to other components. When purchasing various linings, also pay attention to checking the geometric dimensions and shapes. Irregular linings can cause improper fit and reduced performance.
Check whether the rotating parts are flexible.
When purchasing rotating part assemblies such as oil pumps, rotate the pump shaft by hand. It should feel flexible and smooth without any jamming or resistance. A flexible rotating part indicates proper assembly and lubrication, ensuring efficient operation.
For example, if an oil pump shaft is stiff or jammed, it can lead to poor oil circulation and potential damage to the engine. When purchasing rolling bearings, support the inner ring of the bearing with one hand and rotate the outer ring with the other hand. The outer ring should be able to rotate quickly and freely and then gradually stop. If the rotating parts are not flexible, it indicates internal rust or deformation. Do not purchase such parts as they can cause serious problems in the operation of the crane.
Internal rust or deformation can lead to increased friction, heat generation, and premature failure of the bearing. Regular inspection and maintenance of rotating parts can help detect any issues early on and prevent costly breakdowns. Lubrication is also crucial to ensure the smooth operation of rotating parts. Use the recommended lubricants and follow the proper lubrication intervals.
Check whether there are any missing parts in the assembly components.
For regular assembly components of truck-mounted cranes, they must be complete and in good condition to ensure smooth assembly and normal operation. If some individual small parts on some assembly components are missing, the assembly components will not work properly or even be scrapped.
For example, a missing bolt or nut in a crucial assembly can lead to instability and potential failure. A missing gasket or seal can cause leaks and damage to other components. Before purchasing assembly components, carefully inspect them to ensure that all parts are present and in good condition.
Check the packaging and inventory list to make sure that everything is accounted for. If any parts are missing, contact the supplier or manufacturer to obtain the missing items. Do not attempt to use incomplete assembly components as it can pose significant risks to the safety and performance of the crane.
Check whether the glued parts are loose.
Accessories composed of two or more parts are often assembled by press-fitting, gluing, or welding. There should be no looseness between them to ensure proper functioning and durability. For example, the plunger of the oil pump and the adjusting arm are assembled by press-fitting. The clutch driven wheel and the steel plate are riveted together. The friction plate and the steel plate are riveted or glued together. The filter element framework of the paper filter and the filter paper are glued together. The wire ends of electrical equipment are welded.
When purchasing, if looseness is found, it should be replaced. Loose glued parts can lead to separation and failure of the accessory. For example, a loose friction plate can cause clutch slipping and reduced power transmission. A loose filter element can allow contaminants to pass through and damage the engine.
Inspect the glued joints carefully for any signs of separation or weakness. Use a gentle tug or push to test for stability. If there is any doubt about the integrity of the glued parts, it is advisable to choose a different product or have the part repaired or replaced by a professional.
In conclusion, proper winter maintenance of truck-mounted cranes requires attention to these eight important aspects. By carefully inspecting and maintaining the truck-mounted crane parts according to these guidelines, you can ensure the reliability, safety, and longevity of your crane during the cold winter months and beyond. Regular maintenance and inspection can help detect potential problems early on and prevent costly breakdowns and repairs.
