Diesel engine 12V 4000 G73, 16V 4000 G73. Manual - part 8

4.4 Starting the engine in emergency situations (override mode)

CAUTION

Safety functions and engine shutdown alarms will be disregarded.

Serious damage to plant!

• Initiate emergency start only in emergency situations.

Preparation

Item

Task

Operating mode switch

Set to emergency mode.

Starting the engine in emergency situations

Item

Task

Control cabinet

Actuate switch/button for ECU override input.

Control cabinet

• Automatic starting procedure is performed; any safety functions and

alarms leading to engine shutdown are disregarded;

• Tachometer indicates increasing crankshaft speed;

• Engine is running at rated speed when the starting sequence is com‐

pleted.

Connecting the generator (if fitted) to mains

Item

Task

Control cabinet

If generator is not connected to mains: Close generator circuit breaker.

Engine

Operate engine at rated power.

4.5 Operational checks

DANGER

Unguarded rotating and moving engine components.

Risk of serious injury – danger to life!

• Take special care when working on a running engine.

WARNING

Engine noise above 85 dB (A).

Risk of damage to hearing!

• Wear ear protectors.

Operational checks

Item

Task

Control and display panels

Check readings of operational data (speed, temperature, pressures).

Engine oil

Check engine oil level (→ Page 102).

Engine operation

Check engine visually for leaks and general condition;
Check for abnormal running noise, exhaust discoloration and vibrations

(→ Page 40).

Battery-charging generator

Check battery-charging generator for contamination, clean as necessa‐

ry (→ Page 134).

Air filter

Check differential pressure indication at gauge (if fitted).

Exhaust system

Check exhaust color (→ Page 40).

Fuel prefilter

Drain water and contaminants at the drain cock of fuel prefilter (if fitted)

(→ Page 88)
Check reading on vacuum gauge of fuel prefilter (if fitted).

Intercooler

Check condensate drain(s) for water discharge and obstruction

(→ Page 93).

Engine coolant pump

Check relief bore (→ Page 123).

Charge-air coolant pump

Check relief bore (→ Page 132).

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4.6 Stop engine in manual mode (testing mode)

Preconditions

☑ Generator (if provided) not connected to network.
☑ Engine is running in manual mode.

CAUTION

Stopping the engine when it is running at full load causes extreme stress to the engine.

Risk of overheating, damage to components!

• Before stopping the engine, operate it at idle speed until operating temperatures decrease and

stable values are indicated.

Preparing the generator drive (only with generator breaker)

Item

Task

Engine

After opening the generator breaker (if provided), allow to cool down off-

load for approx. 5 minutes.

Preparing the pump drive (diesel-mechanical/diesel-electric)

Item

Task

Engine

Allow to cool down for approx. 5 minutes at reduced engine speed. Ob‐

serve natural resonance of engine (installation-dependent)!

Stopping the engine

Item

Task

Switchgear cabinet, control

panel etc. (depending on

manufacturer)

Press stop button.
• Automatic stopping sequence is performed;

• Engine is stopped.

After stopping the engine

Item

Task

Coolant pump

Allow to run on for sufficient time after stopping.

4.7 Emergency stop

CAUTION

An emergency stop causes extreme stress to the engine.

Risk of overheating, damage to components!

• Initiate emergency stop only in emergency situations.

Emergency stop

Item

Action

Emergency stop pushbut‐

ton

Press EMERGENCY STOP button.
• Engine is stopped by disconnecting the power supply to the ECU;

• Emergency air shutoff flaps close (if provided);

• signalization (e.g. by horn, beacon) is activated.

After emergency stop

Item

Action

Switchgear cabinet, control

panel etc. (depending on

manufacturer)

Press pushbutton for alarm acknowledgment.
• Audible and visual signalization stops.

Engine

Manually open emergency air shutoff flaps (if provided).
• Engine is ready for starting.

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