XQ400 Power Module Caterpillar

Note: Instructions for the installation of the filter are printed on the side of each Cat spin-on filter. For filters that are not Cat filters, refer to the installation instructions that are provided by the supplier of the filter.

Lubricant Recommendations

Due to significant variations in the quality and in the performance of commercially available oils, Caterpillar makes the following recommendations:

• Cat Natural Gas Engine Oil (NGEO)

• Cat EL250 Natural Gas Engine Oil (NGEO)

• Cat EL350 Natural Gas Engine Oil (NGEO)

The proper SAE viscosity grade of oil is determined by the minimum ambient temperature during cold engine start-up and the maximum ambient temperature during engine operation. To determine the oil viscosity that is required for starting a cold soaked engine, refer to the minimum temperature in Table 1. To select the oil viscosity for operation at the highest anticipated ambient temperature, refer to the maximum temperature in the Table. Use the highest oil viscosity that is available in order to meet the required temperature during start-up.

For further information about oils, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".

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 gravity

Field 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:

1. 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.

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 laboratory

Glycol

Preferred - Cat Natural Gas Engine Coolant (NGEC)

Alternatively, use Cat Diesel Engine Antifreeze/Coolant (DEAC) or a commercial heavy-duty coolant/antifreeze that meets "ASTM D6210" or "ASTM D4985" specifications.

Acceptable - In applications that do not require protection from boiling or from freezing, a mixture of water that meets the properties listed in Table 2 and Cat SCA is acceptable.

Note: The preferred coolant/antifreeze and the acceptable mixture of SCA and water require different concentrations of SCA. Refer to the Special Publication, SEBU6400, "Supplemental Coolant Additive (SCA)" topic.

Table 3 is a list of the coolant/antifreeze that is recommended for Cat Gas Engines. The service life of the coolant/antifreeze that is used in Cat Gas Engines is also listed. To achieve this service life, coolants must be maintained properly. The maintenance program includes S·O·S coolant analysis.

Additives

Preferred - Cat Supplemental Coolant Additive (SCA)

Acceptable - A commercial SCA that provides 1200 mg/L (70 gr per US gal) or 1200 ppm of nitrites in the final mixture of coolant/antifreeze

Note: A 50/50 concentration of Cat NGEC or of Cat DEAC does not require a treatment with an SCA at the initial fill. Commercial heavy-duty coolant/antifreeze that meets "ASTM D6210" or "ASTM D4985" specifications may require a treatment with an SCA at the initial fill. Read the label or the instructions that are provided by the OEM of the product.

To ensure that the correct amount of SCA is in the cooling system, the concentration of SCA must be tested on a scheduled basis. Obtain an S·O·S coolant analysis (Level 1) or use a test kit to check the concentration of the SCA according to this Operation and Maintenance Manual, "Maintenance Interval Schedule".

For further information on coolant, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".