However, after a month, the main clutch slipped again, and finally the clutch had to be adjusted every 2H, making construction impossible. At that time, it was decided to replace the full set of the main clutch, but this was not only a waste of money, but also because the busy production time was not allowed. After many adjustments, the crawler bulldozer only pushed a few or dozens of shovel, and the clutch began to slip. The final judgment was caused by the deterioration of the screw ratio between the adjusting plate and the end of the flywheel cover. Therefore, after adjusting the main clutch, lock the lock pin screw with a lock nut. After being dealt with by this method, the machine has been used for six months and the main clutch has not been adjusted, indicating that the fault point has been found.
The main reasons are: blockage of the oil filter and insufficient oil supply, making the booster inoperative; lack of oil in the main clutch hydraulic system; damage to the booster or problem with the safety valve of the booster; burning of the bimetallic sleeve in the moving sleeve. When there is a heavy failure of the clutch lever, first check whether the oil level of the hydraulic system meets the requirements; if the oil level is right, temporarily remove the oil filter, and then move the main clutch lever. If you feel the lever becomes stiff, It means that the oil filter is blocked, and you only need to clean or replace the oil filter. If the oil circuit is normal, but the main clutch lever is heavy, you can first check whether the safety valve of the booster is stuck or drained. If there is no problem with the safety valve of the booster, you must check the booster; or check the bimetallic sleeve in the moving sleeve Whether it is burned, it must be replaceable.
