Engines operator has an opportunity to establish conditions for the best service life by: DANGER 1. Operating as much as possible at three-quarter load. Don’t operate the engine in an area where flam- mable vapors such as gasoline or diesel fumes are present. Shut down the engine when in an area where flammable liquids or gases are being handled. Failure to observe these precautions could result in serious injury or death. 2. Avoiding operation at engine idle speeds or at maximum horsepower levels longer than five min- utes. 3. Developing the habit of closely watching the engine instruments during operation.
Let up on the throttle if the oil temperature reaches 250°F (121°C), or if the coolant temperature exceeds 190°F (88°C). Cummins Engines 4. Checking the oil level frequently during the break-in period. Cummins diesel engines have been built to comply with the requirements of the Federal (U.S.) Clean Air Act. Once an engine is placed in service, the responsibility for meeting both state and local regulations is with the owner/operator. Good operating practices, regular main- tenance, and correct adjustments are factors which will help to stay within the regulations.
Engine Operation Operating vehicles with diesel engines in areas where there are concentrated flammable vapors (such as die- sel, gasoline, or propane fumes) can create a hazard- ous situation. These vapors can be drawn into the en- gine through the air intake, and cause engine overspeed. Be especially cautious of low-lying or closed-in areas, and always check for signs that flam- mable vapors may be present. Proper maintenance of the engine, which is the respon- sibility of the owner/operator, is essential to keep the emission levels low. The driver should be familiar with the vehicle warning system in order to bring the vehicle to a safe stop if the engine malfunctions.
If the driver doesn’t understand how the warning system works, an engine shutdown could occur, causing a safety hazard. See Chapter 3 for information on the control panel for these engines. 4.5