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Never add coolant to an overheated engine; allow the engine to cool first.Check the specific gravity of the antifreeze solution frequently in cold weather to ensure adequate protection.If the engine is to be stored in, or shipped to, an area with freezing temperatures; the cooling system must be protected against freezing to the lowest expected outside temperature.All water is corrosive at engine operating temperature. The cooling system should be protected with conditioner at all times regardless of the concentration of antifreeze. This can be done by either using Caterpillar coolant conditioner elements, or by maintaining a 3% to 6% concentration of liquid Caterpillar cooling system conditioner, or equivalent.To prevent over inhibiting the cooling system, never use both liquid cooling system conditioner and coolant conditioner elements at the same time.Do not use Caterpillar cooling system conditioner or coolant conditioner elements with Dowtherm 209 Full-Fill coolant. Follow the instructions provided with the Dowtherm 209 Full-Fill coolant.
Cooling System Conditioner (Liquid)
Maintain a 3% to 6% concentration of liquid Caterpillar cooling system conditioner, or equivalent. Add the correct amount of cooling system conditioner at every oil change interval. Use 0.24 liters (1/2 pint) conditioner per 38 liters (10 U. S. gallons) of cooling system capacity. On new, rebuilt or remanufactured engines and when changing coolant, use 0.95 liters (1 quart) of conditioner per 30 liters (8 U. S. gallons) of cooling system capacity.Coolant Conditioner Elements
For engines equipped with coolant conditioner elements, install a new maintenance element at every oil change interval. Use a precharge element only when filling the system on new, rebuilt or remanufactured engines, or changing coolant. Your Caterpillar dealer can provide you with the correct coolant conditioner element.General
Coolant should be drained and replaced every 2400 service hours or 2 years, when Caterpillar cooling system conditioner, or equivalent, is added, as recommended.Premix antifreeze solution to provide protection to the lowest expected outside temperature. Pure undiluted antifreeze will freeze at -23°C (-10°F).A mixture of 50% ethylene glycol and 50% water will protect the coolant from freezing down to a temperature of -37°C (-34°F).Use clean water that is low in scale forming mineral. Do not use softened water.Filling at over 20 liters (5 U.S. gallons) per minute can cause air pockets in the cooling system.After draining and refilling the cooling system, start and operate the engine with the fill cap off until the coolant level stabilizes. Add coolant as necessary to fill the system.Operate with a thermostat in the cooling system year-round. Overheating will occur without a thermostat.Fuel System
Fill the fuel tank at the end of each day of operation to drive out moist air and to prevent condensation. Do not fill the tank to the top. Fuel expands as it gets warm and may overflow.Do not fill the fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to the fuel system parts.
Drain water and sediment from the fuel storage tank weekly, and before the tank is refilled. This will help prevent water or sediment from being pumped from the storage tank into the engine fuel tank.Use only fuel as recommended in the "Coolant, Fuel and Lubricant Specifications" section of this guide.Air Intake System
Service the engine air cleaner at regular intervals.An air cleaner service indicator may be mounted on the air cleaner. A colored piston showing in the window indicates the need for servicing the air cleaner. Replace the filter element at least once a year.Inspect the air intake system hoses, elbows and gaskets for cracks or damage, replace as needed. Check for loose clamps, tighten as needed.Scheduled Oil Sampling
Use Scheduled Oil Sampling (S.O.S.) to monitor the condition and maintenance requirements of your equipment. Each oil sample should be taken when the oil is hot and well mixed, to ensure that the sample is representative of the oil in the compartment. Consult your Caterpillar dealer for complete information and assistance in establishing a Scheduled Oil Sampling program for your engine.Electrical System
Engines installed without an engine-to-frame ground strap can be damaged by electrical discharge.To prevent electrical discharge damage, check to make sure the engine's electrical system has an engine-to-frame ground strap. For engines which have the alternator connected to an engine component, the ground strap must connect that component to the frame.
Some engines have starter-to-frame ground straps. But, many of these starters are not electrically grounded to the engine. They have electrical insulation systems. For this reason, the starter-to-frame ground strap may not be an acceptable ground. Use a separate engine-to-frame ground strap.When boost starting the engine, follow the instructions in "Starting From An External Source," in the "Starting the Engine" section, to properly start the engine.Your engine may have a 12 or 24 Volt starting system. Use only the same voltage for boost starting. The use of a higher voltage or a welder will damage the electrical system.