SERIES 50 HOSE, FITTING, AND FILTER FOR THE SERIES 50G ENGINE
The following criteria apply to all fuel hoses used on a Series 50G engine:
All fuel supply hoses must be properly specified per the operating pressure and temperature requirements. Typically, pressure at fuel tanks is 3600 PSIG, pressure into the GFI regulator is 500 PSIG, and pressure out of regulator is 129-144 PSIA.
All fuel hoses must be Teflon with stainless steel braid. The hoses must have a sufficient amount of the homogenous material carbon black added to the Teflon inner core to bleed off static electricity.
Removal of Hose, Fitting and Filter for the Series 50G Engine
Always use wrench flats to tighten. Never use barbed fitting end to torque or tighten or prevent fitting rotation during tightening. Always use proper tools. Do not use pliers. Do not clamp or apply leverage to regulator parts (i.e. high pressure solenoid). Do not clamp or apply leverage to compuvalve solenoids and injectors. Do not clamp or apply leverage to filter.
Swivel Torque, lbft
Swivel Torque, Nm
Lock Nut Torque, lbft
Lock Nut Torque, Nm
Torque Values for Tube and Pipe Fittings
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
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.
Check for and eliminate external leaks, refer to Section
. DO NOT tighten fittings to stop leaks; proper torque is sufficient with clean threads and using a new copper washer.