MAINTENANCE BASICS 22.4.6 LUBRICATING GREASE Lubricating grease reduces wear and operating noise. The grease nipples not specified in the "23. Maintenance Schedule" are only to be used for overhauling purpos- es; for this reason, they do not have to be lubricated. To prolong service life lubricate all moving parts. Remove old grease which is pressed out during lubrication. Ensure that the lubricating grease is not contami- nated with sand or dirt, since this would result in premature wear and tear. 22.4.7 BIODEGRADABLE HYDRAULIC OIL AND LUBRICATING GREASE Biodegradable hydraulic oil and lubricating grease - based on synthetic esters - can be used for Komatsu ma- chines.
Please contact our factory representatives for information about the products which suit best your type of application which are approved by Komatsu. 22.4.8 FUEL The fuel injection pump is a precision device. If the fuel in the fuel injection pump contains water or dirt, this will damage the fuel injection pump. Proceed with utmost care when storing or refuelling, to avoid intrusion of impurities into the fuel. Always use the fuel specified in the operating and maintenance manuals. If the temperature of diesel fuel falls below 5°F (-15°C), paraffin may precipitate, blocking filters and hoses. For this reason, always use a diesel fuel appropriate for these temperatures.
To prevent humidity from condensing in the fuel tank, always refill the fuel tank after daily work has been fin- ished. After refuelling, wait at least ten minutes before draining off dirt precipitations and water. Swirled up impurities will precipitate again during this period of time. If the fuel tank has been „run empty" or filters have been replaced, ventilate the fuel system. Refer to chapter "30. Maintenance Every 500 Operating Hours". If you use fuels with a sulphur content between 0.5 and 1.0%, cut in half the interval for an oil change. If you use fuels with a sulphur content of over 1.0%, quarter the interval for an oil change.
22.4.9 STORAGE OF OIL AND FUEL Store oil and fuel in-doors in sufficiently ventilated rooms to avoid contamination with water, dirt, or other impu- rities. Position barrels which you want to store over longer periods of time sidewards. Store them in such way that the feed opening is on the side. In this way, you avoid formation of humidity in the barrel. Cover barrels that you want to store in the open with a watertight foil or take other appropriate measures to pro- tect the barrels. To avoid a negative influence on the quality during long-time storage, always proceed according to the "first in - first out" principle, i.e. use first that oil or fuel which is stored longest. 125