Section 12.3 Running

Section 12.3

The following sections cover normal operations.‪

Section 12.3.1
Oil Pressure

Observe the oil pressure gage immediately after starting the engine. If there is no pressure indicated within 10 to 15 seconds, or the stop engine light (red) comes on, stop the engine and check the lubricating oil system.‪

Section 12.3.2

Make sure area is well-ventilated before starting the engine.‪



Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.‪

  • Always start and operate an engine in a well ventilated area.
  • If operating an engine in an enclosed area, vent the exhaust to the outside.
  • Do not modify or tamper with the exhaust system or emission control system.

Run the engine at idle with no-load for approximately five minutes, allowing it to warm-up before applying a load. The engine will idle at a higher speed if the oil is cold when started. ‪

As the engine reaches operating temperature, the electronic control system of the engine will lower the idle speed if not equipped with an automatic transmission.‪

If the unit is operating in a closed room, start the room ventilating fan or open the windows and doors, as weather conditions permit, so ample air is available for the engine.‪


While the engine is running at operating temperature, check for coolant, fuel or lubricating oil leaks. Tighten the line connections where necessary to stop leaks.‪

While the engine is idling, check the transmission for proper level and add oil as required. Look for coolant, fuel, or lubricating oil leaks at this time. If any are found, shut down the engine immediately and have leaks repaired after the engine has cooled.‪

Section 12.3.3
Engine Temperature

Refer to "12.5 Operating Conditions" for normal operating temperature.‪

Section 12.3.4

If the engine crankcase was refilled, stop the engine after normal operating temperature has been reached, allow the oil to drain (approximately 20 minutes) back into the crankcase and check the oil level. Add oil, if necessary, to bring it to the proper level on the dipstick.‪

Use only the lubricating oil specified. Refer to "5.2.1 Lubricant Requirement" .‪

Section 12.3.5
Cooling System

Several types of cooling systems are used by vehicle set manufacturers. Refer to OEM guidelines.‪



To avoid scalding from the expulsion of hot coolant, never remove the cooling system pressure cap while the engine is at operating temperature. Wear adequate protective clothing (face shield, rubber gloves, apron, and boots). Remove the cap slowly to relieve pressure.‪

Remove the radiator or heat exchanger pressure cap slowly and check the engine coolant level. The coolant level should be within two inches of the top of the opening. If necessary, add properly inhibited coolant.‪

Entrapped air must be purged after the cooling system is filled. To do this allow the engine to warm up without the pressure cap installed. With the transmission in neutral, increase engine rpm above 1000 rpm and add coolant as required. Install the pressure cap after the coolant level has stabilized at the bottom of the radiator or heat exchanger and check to make sure the coolant level is at the bottom of the filler neck. Add coolant as required, replace the pressure cap, and fill the recovery bottle to the "Full Cold" level, or no more than one-quarter of its volume.‪

Section 12.3.6

Make a visual inspection of the turbocharger for oil leaks, coolant leaks, exhaust leaks, excessive noise and vibration. ‪



To avoid injury from contact with rotating parts when an engine is operating with the air inlet piping removed, install an air inlet screen shield over the turbocharger air inlet. The shield prevents contact with rotating parts.‪

Stop the engine immediately if a leak or unusual noise or vibration is noted. Do not restart the engine until the cause of the concern has been investigated and corrected. Authorized Detroit Diesel service outlets are properly equipped to perform this service.‪

Section 12.3.7
Avoid Unnecessary Engine Idling

During long engine idling periods, the engine coolant temperature will fall below the normal operating range. The incomplete combustion of fuel in a cold engine will cause crankcase dilution, formation of lacquer or gummy deposits on the valves, pistons and rings and rapid accumulation of sludge in the engine.‪

Note: When prolonged engine idling is necessary, maintain at least 850 r/min spring/summer and 1200 rpm fall/winter.

Series 60 Service Manual - 6SE483
Generated on 10-13-2008

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