John Deere CD4039DF008 - Manual (Page 41)

Operating the Engine
DPSG,CD03523,21 –19–09JUL99–1/1
ENGINE OPERATION
Warming engine
Operate engine at high idle for 1 to 2 minutes before
applying the load.
NOTE: This procedure does not apply to standby
generator sets where the engine is loaded
immediately upon reaching rated speed.
Normal engine operation
Compare engine coolant temperature and engine oil
pressure with specifications below:
Minimum oil pressure at full load rated speed 1 —Specification
Pressure 275 kPa (2.75 bar; 40 psi) .....................................................
Coolant temperature range—Specification
Temperature 82
°
—94
°
C (180
°
—202
°
F) ...............................................
Stop engine immediately if coolant temperature is
above or oil pressure below specifications or if there
are any signs of part failure. Symptoms that may be
early signs of engine problems could be:
•
Sudden loss of power
•
Unusual noise or vibration
•
Excessive black exhaust fumes
•
Excessive fuel consumption
•
Excessive oil consumption
•
Fluid leaks
Recommendation for turbocharger engines
Should the engine stall when operating under load,
IMMEDIATELY restart it to prevent overheating of
turbocharger components.
Idling engine
Avoid excessive engine idling. Prolonged idling may
cause the engine coolant temperature to fall below its
normal range. This, in turn, causes crankcase oil
dilution, due to incomplete fuel combustion, and
permits formation of gummy deposits on valves,
pistons and piston rings. It also promotes rapid
accumulation of engine sludge and unburned fuel in
the exhaust system. If an engine will be idling for more
than 5 minutes, stop and restart later.
NOTE: Generator set applications have the governor
locked at a specified speed and do not have a
slow idle function. These engines idle at no
load governed speed (fast idle).
1 Oil at normal operating temperature of 115
°
C (240
°
F).
DPSG,CD03523,22 –19–09JUL99–1/1
STANDBY POWER UNITS
To assure that your engine will deliver efficient standby
operation when needed, start engine and run at rated
speed (with 50%—70% load) for 30 minutes every 2 weeks. DO NOT allow engine to run an extended
period of time with no load.
15-4
112699
PN=41