Break-In Operation; Preparation Before Engine Starting; Engine Start-Up - Mitsubishi S6R Series Service Manual

2. Break-in Operation

2.1 Preparation Before Engine Starting

Check the levels of fuel, engine oil, and coolant, and also bleed air from fuel system and cooling system.
Inspect the link between governor output lever and the fuel injection pump rack. Check that the fuel control rack is at the no-
injection position when the engine is stopped. Check that the control rack is at the "0" position when the stop lever is pulled.
Check the wiring of electrical system (sensor, meter alarm panel, starter, alternator, stop solenoid, and battery). Turn ON the
controller main switch to check for abnormality.
Set the governor speed lever so that the engine may run at a low idling speed after start-up.
Operate the stop solenoid, and make sure that the fuel injection pump rack moves to the no injection position.
Install the pressure gauge, thermometer and flow meter as required.

2.2 Engine Start-up

(1) Pull the stop lever to the no injection position, and crank for approx 10 seconds with starter to circulate engine oil in the
engine. Repeat this 2 or 3 times with one minute intervals between them.
Check that there is no defect such as abnormal noise or rotation speed fluctuation.
(2) Start the engine in the normal procedure.
Check that the engine can run at a low idling speed after start-up.
(3) Check that the oil pressure increases immediately, and the coolant circulates.
(4) Check for leakage of oil, coolant, fuel and gas (air), and abnormal noise and vibration.
(5) After checking the engine low idling without any problem, turn the key switch to OFF position, and make sure that the
engine stops.
2.3 Break-in Operation
Be prepared to activate the emergency stop for unexpected trouble of engine operation.
2.3.1 Break-in Operation Load and Time
The load during break-in operation is to be increased progressively as shown in the table.
Note that the time shown in the table is the minimum time required to check the engine in a stable condition.
Rotating speed (min
1 Low rotating speed
2 Medium rotating speed
3 High rotating speed
4
Marine partial load
5
rotation speed
6
7 Rated speed
Break-in Operation
-1 )
600 to 900
1000 to 1200
1400 to rated speed
Equivalent to 25 % output
Equivalent to 50 % output
Equivalent to 75 % output
Chapter 13 ADJUSTMENT AND OPERATION
Loading Time
factor (min)
No-load 20
No-load 10
No-load 10
25 % 20
50 % 20
75 % 30
100 % 20
13-9