2. INSPECTION AND ADJUSTMENT g) When filling with the cooling water for the first time or replacing, the air contains in the cooling water system. So, as the air in the cooling water system is self-bleeded during engine operation, the cool- ing water level in the radiator and coolant recovery tank will be lowered. Replenish the cooling water into the radiator and coolant recovery tank until it reaches the FULL mark of the coolant recovery tank. Daily check of the cooling water level and refilling can be done by observing the coolant recovery tank. The cooling water capacity of the radiator depends on the machine unit. Refer to the operation manual.
Check the cooling water level when the engine is cold. Cooling water flows to the coolant recov- ery tank when the radiator is still hot and makes accurate checks impossible. Check the radiator and hoses for leakage. (2) Diaphragm ass’y inspection Inspect the diaphragm ass’y on the rocker arm cover every 1000 hours or 2 years. Refer to 4.2.4 point 6 for the function of the diaphragm. 1) Loosen screws, and remove a diaphragm ass’y, and check whether oil and so on doesn't enter between the diaphragm and the cover. If oil and so on enters into the diaphragm ass’y, the diaphragm doesn't work well. 2) Check the damages of the diaphragm rubber and the spring. If necessary, replace with new ones.
[NOTICE] When a diaphragm is damaged, pressure control inside the crankcase becomes insuf- ficient, and troubles such as combustion de- fect and so on occur. At lubricating oil replacement or lubricating oil supply, the amount of lubricating oil isn't to be beyond the standard upper limit. If the lubricating oil quantity is beyond the upper limit or an engine is operated beyond the al- lowable maximum angle of an engine, the amount of oil mist may be inducted in the combustion chamber and the oil hammer sometimes may occur. 2-18 82E-5 – 98E-5 SERIES