The replacement techniques for the curved bearing shells of
Weifang generator sets mainly include the following steps:
Preparation: Ensure that the work area is clean and prevent mechanical impurities and dust from entering the interior of the machine. Prepare necessary tools, including various types of wrenches, screwdrivers, and hammers, to ensure smooth disassembly and installation processes.
Dismantling the crankshaft bearing: Firstly, start from both sides and gradually and symmetrically loosen the bolts of the main bearing cover, maintaining a stable torque to avoid damage to the crankshaft structure. Then, sequentially remove the needle roller bearings inside the flywheel, remove the flywheel and clutch, replace the oil seal on the flywheel end face, and remove the transmission and clutch pressure plates. Use a socket to engage the rocker for disassembly. First, gently loosen it with a screwdriver, then pry up the main bearing cover with appropriate force, and remove the main bearing cover and lower thrust washer in order to ensure the correct matching of the bearing and cover.
Install new bearing shells: Before installing new bearing shells, check for defects such as peeling, cracks, and hard spots. Ensure that the interior of the machine is clean during installation to prevent mechanical impurities and dust from entering. Use a suitable elbow socket wrench to loosen the connecting rod screws, rotate the crankshaft to reach the top dead center position of the piston, and then install a new crankshaft bearing. Manually screw in the connecting rod screws and tighten them to the specified torque value, then reinstall the main bearing cover.
Attention: During the replacement process, it is important to pay attention to the safety and accuracy of the operation, and follow the correct methods and sequence. Pay special attention to the direction of the bearing and the cleanliness during installation to avoid accidents such as burning the bearing and holding the shaft. After installation, check if all components are installed correctly to ensure stable and safe engine performance.
By following the above steps and precautions, it is possible to effectively replace the crankshaft bearings of the Weifang generator set, ensuring the normal operation and service life of the engine.
