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Mitsubishi diesel engines are designed to use diesel fuels meeting the requirements of No. 2-D specified by ASTM (American Society for Testing and Materials) D 975 or Class A specified by B.S. (British Standard) 2869.Care of the fuel supply
Too much emphasis cannot be placed on the importance of using only clean diesel fuel. The clearance between the plunger and barrel of fuel injection pump and that between needle valve and body of injection nozzle are very small. This makes it evident that invisible particles of dirt which might pass through the filter can damage these finely finished parts. 1. Use a storage tank, and allow fuel to stand at least 24 hours in this tank before pumping it to the diesel fuel tank. Be sure to drain all water and sediment that has settled to the bottom of the storage tank before the diesel fuel tank is refilled. 2. Fill the diesel fuel tank at the end of the day. This will drive out moisture-laden air and prevent condensation. 3. When refilling the diesel fuel tank, use clean tools, such as a hand pump, funnels, containers, hoses, etc. Wipe filler cap clean before removing it. When operating the hand pump, keep in mind that there could be water and sediment that has settled to the bottom of storage tank; tap the needed amount of fuel from clean top portion. 4. Be sure to pour fuel through strainer in the filler opening. Use of a lint-free cheese cloth is a good practice for keeping dirt out. 5. Occasionally, open the drain cock of the storage and diesel fuel tank to drain any water or sediment that may have settled to the bottom of the tanks. Even clean top portion of fuel oil contains more or less dirt and water. Such dirt and water should be removed before they get inside the engine. This method of cleaning fuel oil is called "draining."Coolant
1. Water used in the cooling system must be soft, or as free as possible from scale forming minerals. Water, such as is available from the city water supply, is generally soft enough for the engine.2. River water and well water are most likely to contain large amount of scale forming minerals and should not be used. Remember, some waters, particularly those pumped from ground in a mining or hot-spring area, contain active impurities harmful to cylinder liners of your engine.3. Do not fill the cooling system of your engine with only water. Use water-antifreeze mixture because such a mixture provides adequate freeze, corrosion and boiling protection. For your engine, permanent type antifreeze is recommended. Always follow the supplier's recommendations on freeze protection level, usage and handling. Slight over protection is more desirable than under protection.Lubricants
Engine oil
Careful attention to the following information on engine oil and its proper selection will add much to performance, economy and long life of your engine - a high-speed, high-load diesel engine.1. Be sure to use engine oil of the API (American Petroleum Institute) service classification "CD." 2. Avoid mixing engine oils of different brands. In some cases, different brands are not compatible with each other and, when mixed, can seize parts such as piston rings, cylinder liners, etc. or abnormally wear moving parts. It is best to stick with one and the same brand of engine oil at successive service intervals. 3. Draining and refilling To change the oil, drain it when the engine is hot after a duty operation: the oil is hot and will rush out, washing out the sludge. After draining, fill the engine with a flushing oil and allow it to run at low idle for 5 minutes. After flushing, drain the flushing oil and refill with fresh oil.Grease
Use clean multi-purpose grease for your engine.
Cleanliness is important for handling the engine oil and grease. Use clean handling tools; wipe the filter cap, grease fittings and plugs clean; and handle them in a dust-free condition.
Selection
Refer to the following charts in selecting engine oil and grease: Recommended engine oils
Any oil other than those listed above may be used in your engine provided it meets API service classification CD or MIL-L-2104C.