ADAPTER 1910126 - Caterpillar

The customer is responsible for supplying clean, dry fuel to the engine.Fuel filters are no less important than air filters to protect gas engines from dirt and debris. A proper fuel filter removes impurities that can damage the internal components of the engine.
The gas must be supplied to the engine at a pressure that is acceptable. For optimum operation, use a fuel filter that is properly sized for the gas pressure.For many gas engines, fuel filters are a provision of the design for the application. These devices are included in the normal maintenance of the plant. Therefore, Cat does not include a standard fuel filter as a part of each gas engine. However, fuel filters are available from your Cat dealer.Note: Use a fuel filter that is designed to capture a minimum of 99 percent of the particles that are 1 micron in diameter.Consult your Cat dealer about the requirements for filtering your fuel.
Table 1
Inlet & Outlet Filter Group 1.0 Micron .01 Micron
1 1/4 inch NPTF 321-6969 4P4719
2 inch NPTF 321-6970 4P4720 140-1125
3 inch NPTF 321-6971 4P4721 140-1126