Operation; Cautions When Operating; Inspection During Operation; Table 3-1 Standard Values At Rated Speed - Mitsubishi S4S-DT Operation & Maintenance Manual

Operation

Cautions when operating

Do not approach rotating parts during operation.
Entanglement by rotating parts can cause 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, operate the engine under a
light load for break-in operation. Operating the 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 to "OFF" position when
the engine is running. Turning off the battery switch
during operation not only stops the instrument opera-
tions but also may deteriorate the alternator diode
and regulator.
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.

Inspection during operation

Carefully check the exterior of engine such as piping
joints for leaks.
Check for abnormal engine noises or vibrations such
as knocking.
Check the color of exhaust gas from the exhaust muf-
fler.
Check the instruments and gauges for proper opera-
tion and make sure they indicates normal values.

Table 3-1 Standard values at rated speed

Item
Engine oil pressure
Coolant temperature
Note: (a) When the oil pressure drops below 0.15 MPa
{1.5 kgf/cm 2 } [21 psi] in normal operation, or
below 0.05 MPa {0.5 kgf/cm
idling, stop the engine immediately.
Be sure to locate the cause of problem and
correct it before restarting the engine.
(b) When the thermo switch is activated in nor-
mal run, idle the engine in low gear immedi-
ately until the engine temperature becomes
normal. Then, perform cooling operation for 5
or 6 minutes before stopping the engine.Be
sure to locate the cause of problem and cor-
rect it before restarting the engine.
Chapter 3 OPERATION
Standard
0.29 to 0.49 MPa
2
{3 to 5 kgf/cm }
[43 to 71 psi]
70 to 90°C
[158 to 194°F]
2
} [7 psi] at low
3-5