Inspection and maintenance of Komatsu 200-6 engine

Komatsu 200-6 excavator engine cooling system inspection and maintenance

When using pure coolant, it can be replaced every year or 2000h. When the machine is working in dusty area, the maintenance interval should be shortened. The coolant can't use tap water or bottled pure water, and can't use unclean sewage.

Check the cooling water level. Check the cooling water level every day. When the engine is working, the cooling water level must be between the upper limit position and the lower limit position of the water radiator. If the cooling water level is lower than the lower limit position, add cooling water to the water tank.

Note: When the system is not fully cooled, do not loosen the water cover to prevent hot water splashing. Check and adjust the fan tape tension of the fan tape may cause the battery to be insufficiently charged, so every 250h (new machine) Check and adjust the fan tape tension once after 50h for the first time. However, be careful not to overtighten the tape, otherwise the bearing and tape will be easily damaged.

The method of checking the tightness of the tape is as follows: press the middle point of the tape between the fan tape wheel and the alternator tape wheel with the thumb. When the pressure is about 98N, the deflection A should be between 9 and 12 mm. If the tension is not Within this range, loosen the adjusting plate and bracket bolts and adjust the tension bolts. After the tape is in the range of A, tighten the adjusting plate and the bracket bolts. How to clean the water radiator to clean the water radiator as follows:

First, unscrew the water radiator cover, open the water radiator and the discharge bolt on the engine, and turn it off after the coolant is drained. Secondly, inject the water radiator into the tap water and the radiator cleaner to start the engine slightly higher. At idle speed, when the pointer of the thermometer reaches the green area, continue to run the engine for about 15 minutes; finally, turn off the engine and open the radiator drain bolt, rinse the cooling system with tap water until the drain water is clean.

Komatsu 200-6 excavator engine air filter inspection and maintenance

The outer filter element of the air filter should be cleaned once every 100h (or when it is blocked), after 5 times of cleaning or once every 2 months, the inner and outer filter elements (internal and external filter elements need to be replaced at the same time). The replacement method is as follows:

First loosen the fixing nut of the end cap, remove the end cap, then loosen the fixing bolt of the outer filter element, remove the outer filter element and the inner filter element; secondly, gently tap the outer filter element by hand (do not hit on the hard object), and use compression The air is purged from the inside of the filter element, and then the inside of the filter is cleaned. Finally, the inner filter element, the outer filter element and the end cap seal ring are installed, the end cover and the dust exhaust port are cleaned, and then the fixing nut is tightened.