3-13
Chapter 3 OPERATION
Run
Cautions During Operation
Inspection During Operation
Check for abnormal engine noises or vibrations such
as knocking or the exterior of engine such as piping
joints for leaks.
Carefully check the following items whether there is
any abnormality.
Note: (a) If the engine stops because of decreasing
engine oil pressure, be sure to locate the
cause of problem and correct it before re-
starting the engine.
(b) When the thermo switch is activated during
normal operation, run the engine with the idle
speed at low Rpms for 5 or 6 minutes to cool
the engine before stopping the engine. Be
sure to locate the cause of problem and cor-
rect it before restarting the engine.
Do not approach rotating parts during operation.
Entanglement by rotating parts can result in serious
injury.
Do not touch any hot part of the engine such as
exhaust pipes during operation or immediately after
shut down. A hot engine can cause burns.
Always provide adequate ventilation in the engine
room. If air supply to the engine room is not sufficient,
the room temperature rises and can affect engine
output and performance.
For the first 50 hours of the new engine or after the
overhaul, operate the engine under a light load for
break-in operation. Operating the new engine under
heavy load or severe conditions during the break-in
period can shorten the service life of the engine.
Do not turn the battery switch OFF when the engine
is running. Turning off the battery switch during oper-
ation not only stops the instrument operations but
also may deteriorate the alternator diode and regula-
tor.
Never turn the key to the "START" position during
operation. The starter may be damaged.
When operating the engine with a 30 % of rated load
or lower, limit each operation to an hour. Prolonged
warm-up operation causes carbon build-up in the cyl-
inders that leads to incomplete combustion. Operate
the engine with a 30 % of rated load or more for over
5 minutes after continuous operation for an hour to
prevent causing carbon build-up.
Table 3-1 Inspection During Operation
Item to be inspected
Criterion/Reference value
Warning indicator
lamps/Instruments
Lighting/Numerical
anomaly
Engine speed/Fre-
quency
No large fluctuation
Breather mist volume
As usual
Exhaust color
As usual
Damper temperature
90°C [194°F] or lower
Engine oil pressure
0.39 MPa {4 kgf/cm
2
}
[57 psi] or more
Oil Temperature
(oil pan)
110 °C [230 °F] or lower
Coolant temperature
70 to 90°C [158 to 194°F]
Exhaust temperature
550°C [1022°F] or lower
Intake air pressure
0.15 to 0.25 MPa
{1.5 to 2.5 kgf/cm
2
}
[10.85 to 18.08 psi]
