12. OPERATION 12.1.2 CHECK BEFORE STARTING Always carry out the items in this section before starting the engine each day. CHECK MACHINE MONITOR 1. Turn starting switch 1 to the ON position. 2. Check that all monitor lamps and gauges light up for 3 seconds and the alarm buzzer sounds for about 2 seconds. REMARK If the lamps do not light up, there may be a failure or disconnec- tion in the monitor, so please contact your Komatsu distributor. OFF ON NOTICE When carrying out the checks before starting, do not relay only on the monitor. Always carry out all the items listed for the following check and maintenance.
START CHECK COOLANT LEVEL, ADD WATER ¤ WARNING Do not remove cap 1 , 2 while cooling water is hot. Hot water may spout out. When removing cap 1 , 2 wait until the water temperature goes down and release radiator pressure little by little by loosening caps slowly, then remove the cap. 1. Remove radiator cap 1 and check that coolant is above the bottom of the strainer as shown in the diagram. If necessary, add water through filler of radiator cap 1 . 2. Check that there is no abnormality, such as oil in the coolant. 3. If the water level is low, add water through fillers of both radiator cap 1 and subtank cap 2 .
Add into the subtank up to the level above the bottom of strainer through filler of cap 2 as shown in the diagram. 4. To refill the radiator, first stop the engine and pour in water until the water overflows the filler opening. Then, start the engine, check the water level again after a five-minute idling, and add water if necessary. 5. After adding water, tighten the cap 1 , 2 securely. 6. If the volume of coolant added is more than usual, check for possible water leakage. 2-34