Section 11.3 Running

Section 11.3

The following sections cover normal operations.‪

Section 11.3.1
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 check engine light (yellow) illuminated, stop the engine and check the lubricating oil system.‪

Section 11.3.2

Make sure area is well ventilated before starting the engine.‪


The exhaust products of an internal combustion engine are toxic. They may cause injury or death if inhaled. All engine installations, especially those within enclosed spaces, should be equipped with an exhaust discharge pipe so that exhaust gases are delivered into the outside air. An enclosed space must be adequately vented. Some means of providing fresh air into an enclosed space must be ensured.‪

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.‪

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.‪

Engine Inspection

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.‪

Section 11.3.3
Engine Temperature

Refer to "11.5 Operating Conditions" for normal operating temperature.‪

Section 11.3.4

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 to bring it to the proper level on the dipstick.‪

Use only the lubricating oil specified as listed in Table "Recommended Engine Lubrication Oil" .‪

Section 11.3.5
Cooling System

Remove the radiator cap slowly and check the engine coolant level. The coolant level should be filled to the bottom of the filler neck. If necessary, add properly inhibited coolant.‪


Use extreme care when removing a radiator cap in a pressurized system. The sudden release of pressure from a heated cooling system can result in loss of coolant and possible personal injury (scalding) from the hot liquid.‪

Section 11.3.6

Make a visual inspection of the turbocharger for leaks and excessive vibration. Stop the engine immediately if there is an unusual noise in the turbocharger.‪

Section 11.3.7
Avoid Unnecessary Engine Idle

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 800 r/min.

Series 638 Service Manual - 6SE648
Generated on 10-13-2008

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