Series 50 – Section 2.35 Fuel Pressure Gages for the Series 50G Engine With a High Pressure Fuel System

Section 2.35
Fuel Pressure Gages for the Series 50G Engine With a High Pressure Fuel System

Fuel pressure gages should be installed on both high and low pressure sides of fuel system. The high pressure gage should have a range of 0 - 4000 PSI mounted between the tank and 1st stage regulator. The low pressure gage should have a range of 0 - 300 PSI. The gages should be located for ready access for maintenance mounted between the GFI regulator and Compuvalve.‪

Section 2.35.1
Replacement of Fuel Pressure Gages for the Series 50G Engine

Detroit Diesel does not service the fuel pressure gages. Refer to OEM to replace as necessary.‪

Section 2.35.2
Removal of Fuel Pressure Gages for the Series 50G Engine

Prior to removal or replacement of fuel system pressure gages, the fuel system must be vented. Refer to "2.36.1 Venting an Operable Engine to Relieve Natural Gas Pressure" and refer to "2.36.2 Venting an Inoperable Engine to Relieve Natural Gas Pressure" .‪

EXPLOSION ‪
To avoid injury from the explosion of natural gas, the engine must be kept in a well ventilated area away from open flames, sparks, and electrical resistance (heating) coils.‪

Refer to OEM for removal procedure for the fuel pressure gages.‪

Section 2.35.2.1
Inspection of Fuel Pressure Gages for the Series 50G Engine

Refer to OEM for inspection procedure for the fuel pressure gages.‪

Section 2.35.3
Installation of Fuel Pressure Gages for the Series 50G Engine

Refer to OEM for installation procedure for the fuel pressure gages.‪

EXPLOSION ‪

To avoid injury from an explosion of natural gas, the following precautions must be taken:‪ Use a combustible-gas detector. Liquefied natural gas (LNG) is odorless and cannot be detected by smell. Compressed Natural gas (CNG) may be odorless and may not be detected by smell. Equipment fuel systems are the responsibility of the Original Equipment Manufacturer (OEM). Equipment fuel system guidelines must be closely adhered to when installing or servicing equipment. Refer to OEM guidelines specifying which maintenance procedures require venting of fuel lines and fuel tanks. LNG systems are pressurized and contain extremely cold (-162° C [-260° F]) fluids. Contact the fuel supplier or OEM for LNG safety requirements. Contact with LNG may cause personal injury (freezing). Vent systems on the equipment should be ducted to a safe area whenever equipment is in an enclosed area.

Refer to "2.36.3 Leak Checking the Natural Gas Fuel System" for leak checking procedure.‪