SHUTOFF GP-AIR 2727094 - Caterpillar

Fuel Recommendations
Cat gas engines will operate successfully on a broad range of gaseous fuels. Pipeline natural gas has been used for many years. Commercial fuel gases are mixtures of gases. These fuels consist primarily of hydrocarbons (combinations of hydrogen and carbon) and some inert gases. The compositions of these gas mixtures have extreme variations. Contact your Cat dealer before using fuels such as wellhead gas, bio-gas, and manufactured gas. Analyze the fuel in order to determine the following characteristics:
Composition
Contaminants
Heat value
Methane number
Specific gravityField gas can have varying characteristics of combustion. Field gas can contain numerous harmful impurities. The impurities can alter the BTU content. The impurities can also alter the methane number. The impurities include everything from water up to complex hydrocarbons that can lead to detonation and severe engine damage. To minimize these effects, Caterpillar recommends the following guidelines:
Ensure the use of an engine that is configured for a fuel that has a high energy. Consult your local Cat Dealer in order to determine the recommended engine timing. For specific timing recommendations and fuel setup refer to Special Instructions, REHS6590 or contact the local Cat® dealership. For further information on fuels, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".Coolant Recommendations
During shipping and storage, the engine must be protected from damage that can be caused by freezing of the cooling system. The cooling system must contain antifreeze that will withstand the lowest ambient temperature If the engine is shipped to a site with freezing temperatures and if the engine is stored in a location with freezing temperatures. Frequently check the concentration of glycol in the coolant/antifreeze. Make sure that the concentration is adequate in order to prevent freezing. If the coolant may be subject to freezing conditions, completely drain the cooling system.Coolant/antifreeze is normally composed of three elements: water, glycol and additives. Each element must meet specific guidelines.Water
Deionized water or distilled water is recommended for use in engine cooling systems. If distilled water or deionized water is not available, use water with the properties that are listed in Table 2.
Table 2
Caterpillar Minimum Acceptable Water Requirements
Property Maximum Limit ASTM Test
Chloride (Cl) 40 mg/L (2.4 gr per US gal) "D512", "D4327"
Sulfate (SO4) 100 mg/L (5.9 gr per US gal) "D516"
Total Hardness 170 mg/L (10 gr per US gal) "D1126"
Total Solids 340 mg/L (20 gr per US gal) "D1888"
Acidity pH of 5.5 to 9.0 "D1293"
Use of water that does not meet the recommendations for the cooling system will damage the cooling system.Do not use these types of water in the cooling system: sea water, softened water that has been conditioned with salt, hard water and tap water.Only use water that meets the recommendations for the cooling system.
If you are not sure about the properties of your water, consult one of the following sources for a water analysis:
Cat dealer
Local water utility company
Agricultural agent
Independent laboratoryGlycol
Do not use Extended Life Coolant (ELC) with Cat Gas Engines.ELC was not formulated for use in Cat Gas Engines.Do not use