Check the oil level in the fuel tank. If there is no oil or the oil level is too low, it should be filled. After the oil level is fully filled, use a hand pump to supply oil, and open the vent plug on the diesel filter to check if there is air in the oil circuit. If there is any, it should be drained.

Pay special attention to whether there is oil leakage at the oil seals at the front and rear ends of the crankshaft. The front end oil seal of the crankshaft is cracked,damaged, aged, or the contact surface between the crankshaft pulley and the oil seal is worn, which can cause oil leakage at the front end of the crankshaft.

The oil seal at the rear end of the crankshaft is broken or damaged, or the oil return hole in the rear main bearing cover is too small, which can cause oil leakage at the rear end of the crankshaft. Additionally, attention should be paid to whether the rear oil seal of the camshaft leaks oil. The oil seal should be replaced in a timely manner due to aging, cracking, and oil leakage. In addition, it is also necessary to check whether there are external leaks in various components of the engine lubrication system.

Extended Information:

(1) The fuel tank must have sufficient capacity. On the one hand, it is necessary to meet the requirements of heat dissipation as much as possible, and on the other hand, when the hydraulic system stops working, it should be able to accommodate all working media in the system while maintaining an appropriate liquid level during operation.

(2) The suction and return pipes should be inserted below the minimum liquid level to prevent bubbles from being generated by suction and return oil splashing.The distance between the pipe mouth and the box bottom and wall is generally not less than 3 times the pipe diameter. Oil suction pipe can be installed with l00 μ The installation position of mesh or line gap filters around m should be convenient for loading, unloading, and cleaning of the filter. The oil return pipe orifice should be chamfered by 45 °. Corner facing the tank wall to prevent the return oil from impacting the sediment at the bottom of the tank, while also facilitating heat dissipation.