Maintenance 5 5.2. Maintenance basics 5.2.1. Oil, fuel and coolant specifications Oil Oil is used in the engine and work equipment under extremely severe conditions (high temperature, high pressure), and it deteriorates with use. Always use oil that matches the grade and temperature given in the Operation and Maintenance Manual. Even if the oil is not dirty, always replace the oil after the specified interval. Oil can be compared to blood in the human body, so always be careful when handling it to prevent any impurities (water, metal particles, dirt, etc.) from penetrating. The majority of problems with machines are caused by the entry of such impurities.
Take particular care not to let any impurities penetrate when storing or adding oil. Never mix oils of different grades or brands. If only an oil is available which does not match the oil grade/brand in the machine then do not top up the oil, but replace all of it. Always add the specified amount of oil. Having too much oil or too little oil may both cause problems. If the oil in the work equipment is not clear, there is probably water or air getting into the circuit. In such cases, please contact your Komatsu distributor. When changing the oil, always replace the related filters at the same time.
We recommend to have an analysis of the oil made periodically to check the condition of the machine. Those who wish to use this service, are requested to their Komatsu distributor. WA90-5 – VEAM270100 5-13