BRIDGE-VALVE 1764167 - Caterpillar

A fuel filter differential pressure gauge must be installed in order to determine when the fuel filter requires service. This gauge and the fuel filter are supplied by the customer.A fuel filter differential pressure gauge indicates the difference in fuel pressure between the inlet side and the outlet side of the fuel filter. The differential pressure increases as the fuel filter becomes plugged.Operate the engine at the rated speed and at the normal operating temperature. Check the fuel filter differential pressure. Service of the fuel filter depends on the pressure of the fuel system:
For low-pressure gas fuel systems, service the fuel filter when the fuel filter differential pressure reaches 1.7 kPa (0.25 psi).
For high-pressure gas fuel systems, service the fuel filter when the fuel filter differential pressure reaches 34 kPa (5 psi).For instructions, see Special Instruction, SEHS9298, "Installation and Maintenance of Gaseous Fuel Filters". Consult your Cat dealer for assistance.