MTU 12V4000M73 series Operating Instructions Manual page 111

Initial start-up: HAT
1. Replace fuel filter on engine (→ Page 193).
Note: Determine the suction pressure upstream of the engine-mounted fuel delivery pump.
2. Install pressure gage in fuel supply line from Yard fuel system to engine.
3. Switch on fuel treatment system and operate it for some minutes (→ Page 111).
Result: Fuel is drawn from the tank (24). It is then cleaned and dewatered via the filter water separator (15). It is
then returned to the tank (24) via the overflow tank (14). Water settled in the tank is separated.
4. Start engine (→ Page 103).
5. Run engine at idling speed.
6. Check suction pressure (see technical data of the engine) at the engine-mounted fuel delivery pump.
Note: If the suction pressure is within the admissible limits and engine operation is satisfactory.
7. Increase engine speed to 1000 rpm and monitor suction pressure.
8. Check suction pressure at the engine-mounted fuel delivery pump.
Result: If the values are within the limits specified by the manufacturer, the system is ready to start filter replace-
ment simulation with the engine running as part of the Harbor Acceptance Tests.
Simulating filter replacement with the engine running: HAT
1. Switch on fuel treatment system (→ Page 111).
2. Start engine (→ Page 103).
3. Run engine at idling speed.
4. Close ball valve (5) at inlet to fuel treatment system.
Result: The pressure upstream of the fuel treatment system increases until the overflow valve at the pump unit
opens and fuel flows through bypass (3) and bypass (2).
5. Open ball valve (19) .
Result: Fuel emerges. If no fuel emerges:
• Open ball valve (5) at inlet to fuel treatment system.
• No function of bypasses (2) and (3); carry out functional test of bypasses (2) and (3) .
6. Check suction pressure (see technical data of the engine) at the fuel delivery pump.
Note: If the suction pressure is within the admissible limits and engine operation is satisfactory.
7. Increase engine speed to 1000 rpm and monitor suction pressure.
Result: If all engine operating values are within the specified limits, open ball valve (5) at inlet to fuel treatment sys-
tem.
Simulating power failure (emergency): HAT
1. Switch on fuel treatment system (→ Page 111).
2. Start engine (→ Page 103).
3. Run engine at idling speed.
4. Switch off pump (21) at switchgear cabinet (20).
Result: The engine-mounted fuel delivery pump draws fuel via bypass (2) directly from tank (24).
5. Check suction pressure at the engine-mounted fuel delivery pump.
Note: If the suction pressure is within the admissible limits and engine operation is satisfactory.
6. Increase engine speed to 1000 rpm and monitor suction pressure.
Result: Simulation was successful if the suction pressure is within the specified limits.
MS150045/03E 2018-08 | Operation | 109