About the operating instruction of Cummins engines, it is divided into several parts. Here, we mainly talk about what should pay attention to before starting the engines. Keep reading.
1. New and
Rebuilt Engines Break-in
NT series Cummins engines are run-in on dynamometers before being shipped from the factory and are ready to be put to work. But the operator has an opportunity to establish conditions for optimum service life during initial 100 hours of service by complying the following guide.
1) Operating as much as possible at three-quarter throttle of load
range.
2) Avoiding operation for long periods at engine idle speeds, or
at the maximum horsepower levels in excess of five minutes.
3) Developing the habit of watching the engine instructions
closely during operation and letting up on the throttle if the oil temperature
reaches 250 degree Celsius F (121 degree Celsius) or the coolant temperature
exceeds 195 degree Celsius F (91 degree Celsius).
4) Operating with a power requirement that allows acceleration to
governed speed when conditions require more power.
5) Checking the oil level every 8 to 10 hours during the break-in
period.
2. New or
Rebuilt Engines Pre-Starting Instructions – First Time
Priming the
Fuel System
1). Fill the fuel filter with clean diesel fuel.
2) Remove the fuel pump suction line and wet the gear pump gears
with clean lubricating oil.
3) Check and fill the fuel tanks.
4) If the injector and valve or other adjustments have been
disturbed by any maintenance work, check to be sure they have been properly
adjusted before starting the engine.
Priming the
Lubricating System
Note: On turbocharged engines, remove the oil inlet line from the
turbocharger and prelubricate the bearing by adding 2 to 3 ounce. (50 to 60 ml)
of clean lubricating oil. Reconnect the oil supply line.
1) Fill the crankcase to the “L” (low) mark on the dipstick.
Lubricating System Priming point
3) Connect a hand or motor-driven priming pump line from a source
of clean lubricating oil to the plug boss in the housing.
4) Prime until a 30 psi (207 kPa) minimum pressure is obtained.
5) Crank the engine at least 15 seconds (with fuel shut-off valve
closed or disconnected to prevent starting). while maintaining the exteral oil
pressure at a minimum of 15 psi (103kpa).
6) Remove the exteral oil supply and replace the plug. Tighten to
proper torque valve.
Warning: Clean the
area of any lubricating oil spilled while priming or filling the crankcase.
7) Fill the crankcase to the “H” (high) mark on the dipstick with
oil. No change in oil viscosity or type is needed for new or newly rebuilt
engines.
A dipstick oil gauge is located on the side of the engine. The
dipstick has an “H” (high) (1) and “L” (low) (2) level mark to indicate
lubricating oil supply. The dipstick must be kept with the oil pan, or engine,
with which it was originally supplied. Cummins oil pans differ in capacity with
different type installations and oil pan part numbers.
Check Air
Connections
Check the air connections to the compressor and the air equipment,
as used, and to the air cleaners and air crossovers to assure that they all are
secure and have no damage.
Check Engine
Coolant Supply
1. Remove the radiator or heat exchanger cap and check the engine
coolant supply. Add coolant as needed.
2. Make a visual check-for leaks and open the water filter
shut-off valves.
Comments
Post a Comment