The hydraulic motor is a crucial actuator within the hydraulic system of a truck-mounted crane. It plays a vital role in converting the hydraulic pressure energy supplied by the hydraulic pump into the mechanical energy of its output shaft. Undoubtedly, it is an essential component of a truck-mounted crane. Consequently, during usage, it is imperative for the hydraulic motor of the slewing drive device of the truck-mounted crane to always be in optimal condition. Daily inspection and maintenance are indispensable tasks. Next, let’s delve into the cleaning and inspection knowledge of the hydraulic motor of the slewing drive device of the truck-mounted crane with the author.
(1) The slipper part of the plunger assembly of the truck-mounted crane.
A. If damage is detected on the sliding surface, polishing and correction with fine sandpaper can be considered as a remedial measure. When examining the slipper part, close attention should be paid to any irregularities or signs of wear on the sliding surface. Even the slightest damage can potentially affect the performance and efficiency of the hydraulic motor. If only minor damage is present, using fine sandpaper can help smooth out the surface and restore its functionality. However, this process must be carried out with care to avoid further damage. The sandpaper should be of an appropriate grit to ensure that it removes only the damaged areas without overly reducing the thickness of the slipper.
For example, if there are small scratches or blemishes on the sliding surface, gently rubbing the area with fine sandpaper in a circular motion can help remove the imperfections. This can improve the contact between the slipper and the mating surface, reducing friction and enhancing the overall performance of the hydraulic motor.
B. If the damage is extensive, replacement is the only viable option. In cases where the damage to the slipper is severe, such as deep gouges, cracks, or significant deformation, polishing with sandpaper will not be sufficient. Continuing to use a severely damaged slipper can lead to further damage to other components of the hydraulic motor and may even cause a complete failure of the system. Therefore, immediate replacement is necessary to ensure the safe and reliable operation of the truck-mounted crane.
When replacing the slipper, it is essential to use a high-quality replacement part that meets the manufacturer’s specifications. This will ensure proper fit and function, as well as durability and reliability. Additionally, proper installation procedures should be followed to ensure that the new slipper is correctly positioned and secured.
(2) If there are signs of gluing or scratches on the sliding surface of the cylinder block of the truck-mounted crane, it must be replaced.
The cylinder block is another critical component of the hydraulic motor. Any signs of gluing or scratches on its sliding surface can indicate serious problems. Gluing can occur when there is a lack of proper lubrication or when contaminants enter the system. This can cause the moving parts to stick together, resulting in reduced performance and potential damage. Scratches on the sliding surface can also lead to increased friction and wear, as well as potential leakage of hydraulic fluid.
If gluing or scratches are detected on the cylinder block, replacement is the safest and most effective solution. Trying to repair a damaged cylinder block can be extremely difficult and may not provide a reliable long-term solution. A new cylinder block will ensure smooth operation of the hydraulic motor and prevent further damage to other components.
When replacing the cylinder block, it is important to choose a quality replacement part and ensure that it is installed correctly. This may involve disassembling and reassembling the hydraulic motor, which should be done by a trained and experienced technician to ensure proper alignment and sealing.
(3) Under normal circumstances, the outer surfaces of the plunger and the cylinder bore of the plunger assembly and cylinder block of the truck-mounted crane only have very slight wear. If there are signs of slight gluing or many scratches, it must be replaced.
In normal operation, the plunger and cylinder bore should experience only minimal wear. However, over time, even slight wear can accumulate and affect the performance of the hydraulic motor. Signs of slight gluing or multiple scratches can indicate that the lubrication is inadequate or that contaminants have entered the system.
If only minor wear or gluing is present, it may be possible to clean and lubricate the components to improve their performance. However, if there are many scratches or if the wear is significant, replacement is necessary. Continuing to use a damaged plunger or cylinder bore can lead to increased friction, reduced efficiency, and potential damage to other parts of the hydraulic motor.
When replacing the plunger or cylinder bore, it is crucial to use high-quality replacement parts that are designed to fit precisely and function properly. Additionally, proper installation and lubrication are essential to ensure the longevity and reliability of the new components.
(4) If the spline shaft is severely worn, it must be replaced; if the sliding surface of the oil seal is damaged or worn, it must be replaced.
The spline shaft is responsible for transmitting power from the hydraulic motor to other components of the truck-mounted crane. Severe wear on the spline shaft can lead to misalignment, reduced power transmission, and potential damage to other parts of the system. If the spline shaft is found to be severely worn, it must be replaced without delay.
Similarly, the oil seal plays a crucial role in preventing hydraulic fluid leakage. If the sliding surface of the oil seal is damaged or worn, it can result in fluid leakage, which can cause a loss of pressure and reduced performance. Replacement of the damaged oil seal is essential to maintain the integrity of the hydraulic system.
When replacing the spline shaft or oil seal, it is important to use genuine replacement parts and follow proper installation procedures. This will ensure that the new components fit correctly and function properly, preventing further damage and ensuring the reliable operation of the truck-mounted crane.
In conclusion, regular cleaning and inspection of the hydraulic motor of the slewing drive device of a truck-mounted crane are essential for maintaining its performance and reliability. By paying close attention to the various components and addressing any signs of damage or wear promptly, operators can ensure the safe and efficient operation of their truck-mounted cranes.
