Maintenance 5 Coolant River water contains large amounts of calcium and other impurities, so if it is used, scale will stick to the engine and radiator causing a defective heat exchange and overheating. Do not use water that is not suitable for drinking. When using anti-freeze, always observe the precautions given in the Operation and Maintenance Manual. Komatsu machines are supplied with Komatsu original anti- freeze in the coolant when the machine is shipped. This anti-freeze prevents corrosion in the cooling system. Therefore, it can be used as it is even in hot areas. Anti- freeze is flammable, so be extremely careful not to expose it to open flame or fire.
The proportion of anti-freeze to water differs according to the ambient temperature. For details of the mixing ratios, see "Cooling system – exchanging coolant and cleaning the system" on page 5-66 If the engine overheats, wait for the engine to cool before adding coolant. If the coolant level is low, it will cause overheating and corrosion due to the air in the coolant. Grease Grease is used to prevent twisting and noise at the joints. The nipples not included in the maintenance section are nipples for overhaul, so they need not be lubricated. If any part becomes stiff after being used for a long time, add grease. Always wipe off all of the old grease that is pushed out when greasing.
Be particularly careful to wipe off the old grease in places where sand or dirt in the grease would cause the rotat ing parts to wear. WA90-5 – VEAM270100 5-15