2010 Mack Natural Gas MRU,LEU Operator's Manual

2010 Mack Natural Gas MRU,LEU Operator's Manual
Mack Natural Gas MRU,LEU Operator's Manual PDF

The information in this manual applies to vehicles built January 2010 and later. Please keep this manual in the vehicle at all times. This Handbook only applies to LEU and MRU models equipped with natural gas engines. For models equipped with diesel engines, please refer to Mack Terra Pro Series Operator’s Handbook.

About This Handbook
This handbook is referred to as the Cummins-Wesport ISL-GTM Natural Gas Engine Handbook. It covers all Natural Gas Engine models. Keep this handbook with the vehicle at all times to ensure that each owner and/or operator will have access to all pertinent information relating to the operation and handling of this vehicle.

This supplement was prepared to provide the driver with all relevant information concerning the natural gas engine, its characteristics and its potential hazards if not maintained properly. Please read it thoroughly; pay particular attention to advisory labels that have been included to draw attention to important issues of operator safety and overall performance.

The scope of this handbook is not to cover all situations related to LNG/CNG safety. Effective safety training programs are required at all LNG/CNG vehicle facilities to ensure the safety of personnel, protect property and maintain facility performance requirements. Familiarizing all personnel with basic LNG/CNG information will allow them to make well-informed safety judgments. A safety program at the facility should include:

  1. Scheduled equipment inspections
  2. Operational safety procedures
  3. Personnel training and certification
  4. Emergency response procedures and periodic practice drills
  5. Emergency response community interaction

Although this handbook contains safety information that may be used in conjunction with a safety training program, it is not to be viewed as a safety-training manual. The safety information contained in this manual is for reference and recall of information already covered in an ongoing safety program. Only safety training and periodic practice drills can adequately train operators and local emergency personnel (such as fire departments, medical emergency units and police departments) for safely handling potentially dangerous situations in the community proximate to LNG/CNG facilities and LNG/CNG vehicle operation.

Before Entering the Vehicle
Green and red methane detector remote indicator lamps are easily viewed through the windshield and should always be checked before entering the vehicle. (See illustration.)

Note: When the battery is disconnected, the methane detector/alarm system will not operate so the green lights will not be on. The methane detector/alarm system is powered by the battery and is active at all times unless the battery is disconnected or the fuse is blown.

Hand-held methane detector/alarm devices should be used when working on natural gas vehicles with a nonfunctional or disconnected methane detector/alarm system and where no auxiliary methane detector/ alarm system is installed.

LNG Tank
There are one or two LNG tanks. They are mounted on one or both sides of the truck with the plumbing components accessible inside the rear of each tank. The LNG fuel tank is, for simplicity of explanation, designed like a vacuum (ThermosTM) bottle which can withstand pressures up to 230 psi, or whatever maximum pressure is posted on the manufacturer’s label (see illustration).

  1. Rear of Tank (Shroud) with Door Closed
  2. Maximum-Pressure Label in Pounds per Square Inch (psi)
  3. Manufacturer’s Label
  4. Fuel Tank Fill Fitting
  5. Tank Safety Label
  6. Liquefied Natural Gas Symbol

Fill Connection to Second Fuel Tank - When fueling, LNG will enter the second vessel through this connecting pipe.
Manual Vent - This valve is clearly marked with OPEN and CLOSE directional arrows. It is normally kept closed, but may be opened to bleed the tank or in certain fueling situations which are described in the section "LNG Fueling."

During the daily walk around inspection, if you see any signs of a methane leaks as previously mentioned in the SAFETY section of this handbook, open the tank door. If the Evacuation Plug has popped out, the tank must be serviced before operating.

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