Diesel engine 12V 4000 G73, 16V 4000 G73. Manual - part 9

4.8 After stopping the engine – Engine remains ready for

operation

After stopping the engine

Item

Action

Engine/generator/pump

control

Select operating mode, e.g. MANUAL, AUTOMATIC OPERATION.

4.9 After stopping the engine – putting the engine out of service

Preconditions

☑ MTU Fluids and Lubricants Specifications (A001061/..) is available.

After stopping the engine

Item

Task

Cooling system

Drain engine coolant (→ Page 118);
Drain charge-air coolant (→ Page 128) if:

• freezing temperatures are expected and the engine is to remain out of

service for an extended period and coolant has no antifreeze additive;

• the engine room is not heated;

• the coolant is not maintained at a suitable temperature;

• the antifreeze concentration is insufficient for the engine-room tempera‐

ture;

• antifreeze concentration is 50 % and engine-room temperature is below

-40°C.

Engine/generator/pump

controller

Switch OFF.

Air intake and exhaust sys‐

tem

If the engine is to remain out of service for more than 1 week, seal the

engine's air and exhaust sides. If the engine is to remain out of service for

more than 1 month, preserve engine (→ MTU Fluids and Lubricants Speci‐

fications A001061/.. ).

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5 Maintenance

5.1 Maintenance task reference table [QL1]

The maintenance tasks and intervals for this product are defined in the Maintenance Schedule. The

Maintenance Schedule is a stand-alone publication.
The task numbers in this table provide reference to the maintenance tasks specified in the Maintenance

Schedule.

Task

Maintenance tasks

W0500

Check engine oil level

(→ Page 102)

W0501

Visually inspect engine for leaks and general condition

(→ Page 34)

W0502

Check intercooler drain (if fitted)

(→ Page 93)

W0503

Check air filter service indicator

(→ Page 97)

W0505

Check relief bores of coolant pump(s)

(→ Page 123)

W0506

Check engine for abnormal running noises, exhaust color

and vibrations

(→ Page 34)

W0507

Drain water and contaminants from fuel prefilter (if fitted)

(→ Page 34)

W0508

Check vacuum gauge reading on fuel prefilter (if fitted)

(→ Page 34)

W0525

Check battery-charging generator for contamination, clean if

necessary

(→ Page 134)

W1001

Replace fuel filter or fuel filter element

(→ Page 85)

W1005

Replace air filter

(→ Page 94)

W1006

Replace fuel injectors

(→ Page 78)

W1008

Replace engine oil filter at each oil change or when the time

limit (years) is reached, at the latest

(→ Page 107)

W1009

Check layer thickness of oil residue, clean and replace filter

sleeve (if fitted)

(→ Page 113)

W1011

Perform endoscopic inspection of combustion chambers

(→ Page 66)

W1024

Check (electric) operation of emergency air-shutoff flaps

(→ Page 98)

W1036

Replace coolant filter

(→ Page 125)

W1046

Crankcase breather: Replace filter or filter element

(→ Page 70)

W1241

Check condition of belt drive and replace if necessary; adjust

belt tension

(→ Page 133)

W1247

Lubricate emergency air-shutoff flap lubrication points

W1250

Replace all rubber sleeves

(→ Page 96)
(→ Page 99)

W1251

Replace all hose lines

W1294

Check valve clearance, ATTENTION! Initial adjustment after

500 operating hours!

(→ Page 73)

Table 1: Maintenance task reference table [QL1]

6 Troubleshooting

6.1 Troubleshooting

Engine does not turn when starter is actuated

Component

Cause

Action

Battery

Low or faulty

Charge or replace (see manufacturer's

documentation).

Cable connections defective

Check if cable connections are proper‐

ly secured (see manufacturer's docu‐

mentation).

Starter

Engine wiring or starter defective

Check if cable connections are proper‐

ly secured, contact Service.

Engine cabling

Faulty

Check (→ Page 140).

Engine/generator

control

Secure seating of assemblies or con‐

nectors not provided

Perform visual inspection (see manu‐

facturer's documentation).

Engine governor

Plug-in connections are loose

Check plug-in connections

(→ Page 143).

Engine

Running gear blocked (engine cannot

be barred manually).

Contact Service.

Engine turns but does not fire

Component

Cause

Action

Starter

Poor rotation by starter: Battery low or

defective.

Charge or replace battery (see manu‐

facturer's documentation).

Engine cabling

Faulty

Check (→ Page 140).

Fuel system

Air in fuel system.

Vent fuel system (→ Page 84).

Engine governor

Faulty

Contact Service.

Engine fires unevenly

Component

Cause

Action

Fuel injection equip‐

ment

Injector faulty.

Replace (→ Page 78).

Engine cabling

Faulty

Check (→ Page 140).

Fuel system

Air in fuel system.

Vent fuel system (→ Page 84).

Engine governor

Faulty

Contact Service.

Engine does not reach rated speed

Component

Cause

Action

Fuel supply

Fuel prefilter clogged.

Replace

Easy-change fuel filter clogged

Replace (→ Page 85).

Air supply

Air filter clogged.

Check signal ring position of service in‐

dicator (if fitted) .

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