GAUGE GP-COOLANT TEMPERATURE 2005222 - Caterpillar

Lubrication System
Lubricant Recommendations
Due to significant variations in the quality and in the performance of commercially available oils, Caterpillar makes the following recommendations:
Cat NGEO (Natural Gas Engine Oil)
Cat NGEO EL250 (Natural Gas Engine Oil)
Cat NGEO EL350 (Natural Gas Engine Oil)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.
Table 1
Engine Oil Viscosity
Cat NGEO
Grade of Viscosity Ambient Temperature
Minimum Maximum
SAE 30(1) 0 °C (32 °F) 40 °C (104 °F)
SAE 40(1) 5 °C (41 °F) 50 °C (122 °F)
(1) Cat NGEO is available in these grades only. Multigrade oils are NOT recommended for use in Caterpillar Gas Engines. If other grades of viscosity are selected, ensure that the oil meets the requirements for Caterpillar Gas Engines.For further information about oils, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel, and Coolant Recommendations".Lubricant Capacities
The capacity of the engine crankcase includes the capacity of the oil filters that are installed at the factory.
Table 2
Lubrication System
Approximate Refill Capacities
Engine Liters US Gallons
G3516B 423 112
G3520B 541 141 Hydraulic Oil
Caterpillar Hydraulic Oil is recommended in most hydraulic systems. If Caterpillar oils cannot be used, the following commercial classifications can be used in hydraulic systems:
CH-4 engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
CG-4 engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
CF-4 engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)
CF engine oils that have a minimum zinc additive of 0.09 percent (900 ppm)Note: Industrial hydraulic oils are not recommended for service fill in Caterpillar hydraulic systems.Caterpillar also has a biodegradable hydraulic oil that is available for use in hydraulic systems. This fluid is recommended for the hydraulic systems when environmental compliance is required or desired.For further information on choosing a hydraulic oil, see Special Publication, SEBU6400, "Caterpillar Gas Engine Lubricant, Fuel and Coolant Recommendations".Capacity of the Electrohydraulic Actuator's System
Table 3
Electrohydraulic Actuator System
Approximate Refill Capacity
Compartment or System Liters US Gallons
Hydraulic Oil Tank 5.7 1.51 Fuel
Fuel Recommendations
Caterpillar 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. Fuels such as wellhead gas, bio-gas, and manufactured gas need to be reviewed for acceptability. 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