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SERIES 50 LOW PRESSURE FUEL REGULATOR FOR THE SERIES 50G ENGINE

The low pressure fuel regulator is mounted on the generator base on the right side of the engine. This location minimizes the distance between the regulator outlet and the inlet of the PSV. There are four hoses connecting the regulator to the engine; the fuel supply, one air balance and two fuel balance hoses. See Figure 27789 . ‪

Replacement of the Low Pressure Fuel Regulator for the Series 50G Engine

The low pressure fuel regulator is not serviceable and should be replaced as a unit. No adjustment is required. ‪

Removal of the Low Pressure Fuel Regulator for the Series 50G Engine

Remove the low pressure fuel regulator as follows: ‪

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.

  1. Vent fuel system; refer to Section and refer to Section .
  2. Disconnect and remove 1 in. air balance hose.
  3. Disconnect and remove the two 3/8 in. fuel balance lines.
  4. Disconnect and remove the 11/4 in. fuel supply line.
  5. Remove the low pressure fuel regulator and fuel inlet pipe from the mounting bracket.
  6. Remove fuel inlet pipe from regulator.

Disassembly of the Low Pressure Fuel Regulator for the Series 50G Engine

Disassembly of the low pressure fuel regulator is not required. ‪

Cleaning of the Low Pressure Fuel Regulator for the Series 50G Engine

Cleaning of the low pressure fuel regulator is not required. ‪

Inspection of the Low Pressure Fuel Regulator for the Series 50G Engine

Inspection of the low pressure fuel regulator is not required. ‪

Test of the Low Pressure Fuel Regulator for the Series 50G Engine

Test of the low pressure fuel regulator is not required. ‪

Installation of the Low Pressure Fuel Regulator for the Series 50G Engine

Install the low pressure fuel regulator as follows: ‪

  1. Install fuel inlet pipe into the regulator
  2. Secure the low pressure fuel regulator and inlet pipe to the mounting bracket.
  3. Connect the 1 1/4 in. fuel supply line.
  4. Connect the two 3/8 in. fuel pressure balance lines.

    Note: Use caution when installing hoses to avoid twisting or kinking the hose. This could result in increased flow restriction and affect engine performance.

  5. Connect the 1 in. air balance line.

    EXPLOSION

    To avoid injury from an explosion of natural gas, the following precautions must be taken:

    • Do not smoke when installing or servicing the engine or fuel system.
    • Installation or servicing of natural gas equipment must only be conducted in well ventilated, natural gas-compatible areas. Do not install or service equipment in an enclosed area where ignition sources are present without first ensuring that an undetected gas leak may be safely vented without being ignited.
    • Bleed natural gas lines before installing or servicing any component connected to the fuel lines.
    • Natural gas fuel systems are pressurized. Relieve pressure from any fuel system component prior to installation or service of that component.
    • 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 (-260 F [-162 C]) 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.
  6. Check hoses and fittings for leaks; refer to Section .