0334640 JOHNSON DIAPHRAGM

Table 1
Cat NGEO SAE 40 Viscosity Grade Properties
Characteristic ASTM Test Cat NGEO Cat EL250 Cat EL350
API Gravity at 16.0 ° C (60.8 ° F) "D0287" 28 27.5 29.3
Flash Point 0 ° C (32 ° F) "D0092" 252 262 247
Pour Point 0 ° C (32 ° F) "D0097" −15 −12 −21
Viscosity at 100 °C (212 °F) "D0445" 13.2 13.5 13.5
Viscosity Index "D2270" 98 99 97
Weight (Percent) of Sulfated Ash "D0874" 0.52 0.57 0.54
Total Base Number "D2896" 5.6 6.5 6.2 For additional information about oils for gas engines, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".S O S Services Oil Analysis
Caterpillar recommends the S O S oil analysis program to monitor the condition of the oil. The analysis can help determine the maintenance requirements for the engine. The S O S program is part of the preventive maintenance program. For further information about the S O S program, see this Special Publication, "S O S Services Oil Analysis" topic.Coolant Recommendations
During shipping and storage, the engine must be protected from damage that can be caused by freezing of the cooling system. If the engine is shipped to a site with freezing temperatures and/or if the engine is stored in a location with freezing temperatures, the cooling system must contain antifreeze that will withstand the lowest ambient temperature. Frequently check the concentration of glycol in the coolant/antifreeze. Make sure that the concentration is adequate to prevent freezing. Otherwise, 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 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 heat transfer fluids in Cat Gas Engines.Use only the coolant/antifreeze that is recommended.
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.
Do not use a commercial coolant/antifreeze that only meets the ASTM "D3306" or equivalent specification. This type of coolant/antifreeze is made for light duty automotive applications.Use only the coolant/antifreeze that is recommended.
Acceptable - In applications that do not require protection from boiling or freezing, a mixture of Cat SCA and water that meets the properties that are listed in Table 2 is acceptable.Note: The preferred coolant/antifreez