Series 60 – Section 2.45 Fuel Mixer for the Series 60G High Pressure Fuel System

Section 2.45
Fuel Mixer for the Series 60G High Pressure Fuel System

The venturi fuel mixer assembly consists of a die cast aluminum body with a spun aluminum venturi permanently inserted into it. The unit has no moving parts. The mixer assembly is attached to the throttle located at the left front of the engine. See Figure "Fuel Mixer for the Series 60G Engine" . ‪

	1. Fuel Temperature Sensor‪	5. Air Inlet Elbow‪
	2. PSV‪	6. Low Pressure Regulator‪
	3. Fuel Mixer‪	7. Air Temperature Sensor‪
	4. Throttle‪	8. Fuel Pressure Sensor‪
	‪	9. Fuel Inlet Tee-Fitting‪

Figure 1. Fuel Mixer for the Series 60G Engine

Section 2.45.1
Replacement of Fuel Mixer for the Series 60G Engine High Pressure Fuel System

The fuel mixer is non-serviceable and should be replaced as a unit. No adjustment is required.‪

Section 2.45.2
Removal of Fuel Mixer for the Series 60G Engine High Pressure Fuel System

Remove the fuel mixer 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 "2.51.1 Venting an Operable Engine to Relieve Natural Gas Pressure" and refer to "2.51.2 Venting an Inoperable Engine to Relieve Natural Gas Pressure" .
2. Disconnect hose between mixer and charge cooler outlet tube.
3. Disconnect and remove the PSV from the fuel mixer, refer to "2.44.2 Removal of Pulse Width Modulated Stepper Motor Valve for the Series 60G Engine" .
4. Disconnect air balance hose at mixer.
5. Remove four fuel mixer mounting bolts.
6. Separate and remove the fuel mixer from the throttle.

Section 2.45.3
Installation of Fuel Mixer for the Series 60G Engine High Pressure Fuel System

Install the fuel mixer as follows:‪

1. Clean gasket surface and install a new gasket.
2. Secure the fuel mixer to the throttle with four bolts finger-tight.
3. Install the PSV to the fuel mixer, refer to "2.44.3 Installation of Pulse Width Modulated Stepper Motor Valve for the Series 60G Engine" .
4. Connect air balance hose to PSV and mixer.
5. Torque mixer bolts to 20 N·m (15 lb·ft).
6. Connect hose between mixer and charge cooler outlet tube.

   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 (-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.

7. Perform a leak check procedure. Refer to "2.51.3 Leak Checking the Natural Gas Fuel System" .