Mitsubishi 4DQ50 Bedienungsanleitung

SERVICE MANUAL

三菱ディーゼルエンジン

MITSUBISHI

DIESEL ENGINE

4DQ50

MITSUBISHI HEAVY INDUSTRIES, LTD.

No. 5-1, Marunouchi, 2-chom Chiyoda-ku, Tokyo Japan

Phon : Tokyo (03) 212-3111 T l x: J22282, J22443 HISHIJU

SERVICE MANUAL

99609-50000

DEC 1985

MITSUBISHI DIESEL ENGINE MODEL

4DQ5OW

MITSUBISHI DIESEL ENGINE MODEL

4DQSOC

CONTENTS

PREFACE

..................................................

CHAPTER 1 OPERATION

AND

HANDLING

.........................

Newengine

.............................................

2 Checkup

and

preparations

prior

starting

........................

3 Engine starting

After

the engine's start

......................................

5 Engine operation

6 During operation

..........................................

7 Stopping

...............................................

8 Handling in cold weather

.:...................................

8-1

Starting in cold weather

..................................

8-2 General instructions

.....................................

9 Handling in the

hot

season

....................................

CHAPTER 2 FUEL,

OIL

AND

COOLING WATER 9

Fuel.....................................................

2 Engine oil

...............................................

2-1

Quality required

engine oil

...

. . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Recommendable

classes

engine oil

..........................

2-3 Time

change

engine oil

.................................

3 Diaphragm oil

•......•....................................

4 Cooling water

............................................

4-1

Required quality

...............•.......................

4-2 Handling

cooling

system

..........•.....................

CHAPTER 3 REGULAR

SERVICING.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lubrication

..........

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air

system

..............................................

2·1 Air cleaner (oil bath type)

.................................

2·2

Air cleaner (filter paper type)

...............................

2·3 Valve clearances

.......................................

2·4

Compression pressure

....................................

3 Oil system

..........................•...................

3·1 Oil pan

.............................................

3·2

Oil filter

.............................•.............

3·3

Differential bypass valve

..................................

3-4

Oil

pressure

..........................................

4 Fuel system

.............................................

4·1 Fuel filter

............................................

4-2 Bleeding (or priming)

....................................

4·3

Checkup

nozzles

.....................................

4·4

Fuel injection pump

....................•................

4·5

Fuel injection timing

....................................

4·6

Governor (pneumatic)

•..................................

4·7

Governor (mechanical)

...................................

Governor (Model RSV, bosch type)

.•••.•••..••...•..••••.....•.

4-8 Automatic timer . . • • •

...•••••...•..•........•..•......•..

4-9 Measurement

engine speed

...............................

5 Cooling

System.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-1

Cooling water and radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5-2

Thermostat...........................................

5-3 Tension

fan belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 Electric system

..........•................................

6·1

D.C.

Generator

.........................................

6·2

A.C. Generator

••..•..•..

. . . . . • • . • • • • • • • • • • • • • • • • . • . . . .

.•

6·2-1

D.C.

Generator

Relay

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6·2·2

A.C.

GeneratorRelay . . . • • . . • • . • • • . . • • • • • • . . • • . • • . . . • • . . .

••

6·3

Starter

.........•.......................•............

6·4

Battery

.............................................

7 Re·screwing

main bolts

....................................

7·'

Cylinder head clamp bolts

.............................•...

7·2 Main bearing

caps

and

connecting rod

caps

......................

7·3 Others

..............................................

CHAPTER 4

TROUBLE·SHooTING..................................

Trouble

shooting

chart

.•••.

. • . . . . . . • • . • . • • . . . • • • • • . • • . • . . • . • • •

••

Trouble

shooting

chart

(Appendix)

•.•

. • • . • • • • • . • • . • . • . . . . . . • • • . • . • .

••

CHAPTER 5 OVERHAULING INSTRUCTIONS

........................

General instructions

........................................

2 Cylinder

head

and

valves

.....................................

2·'

Reface

valve

seats

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2·2 How

replace

valve

guides

................................

2·3 Combustion chamber

jet

and

director

.........................

2·4 Rocker shaft brackets

.......•............................

3 Pistons and connecting rods . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . .

3·'

How

remove

and

install piston and connecting rod

ass'y

...........

3·2

How

ceuple piston

with

connecting rod

......................

3-3 How

remove

and

install piston pins

.........................

4 Cylinders

................................................

4·'

Oversizes

............................................

4-2 Cylinder liners

...............

. . . . . . . . . . . . . . . . . . . . . . . .

5 Bearing metals

............................................

5·'

General cautions

.......................................

5-2

How

assemble

main bearing metals . _. . . . . . . . . . . . . . . . • . . . .

5-3 Undersizes

..•....•...................................

6 Timing

gear

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6·'

Timing

gear

train

.•.....................................

6·2 Valve timing

..........................................

7 Oil

seals

................................................

8 Mountings

..............................................

9 Oil

pan

installing

..........................................

Oil

pump

.•..•........•.•...............................

Water

pump

.•......................•..........•.•.•.....

Bolt

screwing

•.......•........................•..........

Model 40Q50

engine

service

standard

••..•••.••.•.•••...•..•.••.•••

IiAPTER 6 TOOLS

...........................................

100

Common tools

.............................................

100

2 Special tools

..............................•..............

101

APTER

7 MAIN SPECIFICATIONS AND PERFORMANCE .

.............

103

Main specifications

Mitsubishi Diesel Engine Model

40050

............

103

2 Performance

Mitsubishi Diesel Engine Model

40050

.................

104

40050A

(for

motor

vehicles) performance curve

...................

105

40050C

(for

construction machine) performance curve

..............

106

40050P

(for

general power) performance curve

...........•.......

107

PREFACE

every new Model

40050

Engine, fuel injection pump and governor lever bear lead

seals

that

were

put

after their setting upon final confirmation of its performance through

test runs,

our factory. This service manual

intended

cover regular maintenance

services. For informations

about

particular servicing, especially

sealed units and parts

such

mentioned above, please contact

our

service man

your

dealer.

Engine name plate

found on the up-side

rocker case. Engine Model and No. are

given on it.

They are also stamped on

the

right.side

crankcase. They will serve as important data

know

the

engine's career and make-up of components.

Fig.

0-1

Stamped engine No. Fig. 0-2 Service

meter

3. As for fuel, engine's power source, and lubricating

oil

smooth engine operation,

please use those are above

class as shown

caution plate. Their choice has a

considerable influence on

the

engine's service life. Lubrication and other servicing

accordance with the instructions given herein will promise its most satisfactory operation.

For

regular service intervals are based on the reading

service meter,

don't

forget

read

it every day.

the

same time, check the day's fuel and oil consumptions. The data

collected

thus

every day

will

prove very useful

know later how

the

engine has been

running and

the time.

hope

that,

along with this manual, you will make use

the

parts catalogue

deepen your knowledge about

the

handling

your engine.

-1-

CHAPTER 1 OPERATION AND HANDLING

NEW

ENGINE

Prior

putting it

use, check as follows:

1) See if there are any loose bolts

nuts.

Lubricate according

Lubrication Table given later.

3) -Fill fuel tank with clean fuel

and

bleed (or prime) fuel system.

Fill radiator with clean

soft

water

as a ccolant.

When air temperature

expected

fall below

the

freezing point, use an antifreeze.

The

service life

new engine much depends upon how it

handled

the initial

runs. So, lubricate, and check it with particular care (Refer

Lubrication and Service

Tables), and before it covers 60Hr, follow

the

instructions given below, taking care

not

overstrain it.

After

starting, never apply load immediately

without

warming it up well by idling.

Don't

run

high speed.

3) Run

under

some

70%

load

the

maximum.

-2.

CHECKUP AND PREPARATIONS PRIOR TO

STARTING

Prior

starting

the

day's operations, check as

follows with

the

engine placed as level as possible.

Engine oil level

Pull

out

oil level gauge and wipe;

then

put

in and

out

again

check oil level. Oil level

must

above mid-point between

upper

"FULL"

line

and lower one. If near or below

the

mid·point,

refill

upper

line

"FULL".

Oil level difference between these

two

lines

corresponds

approx. 1 litre.

After

refilling, wait for all

added

oil

run Fig.

1-1

Ch~king

oil level

down

into oil

pan

and for

oil

level

settle, before checking itagain.

2) Cooling

water

level

Optimum

-water level

20'-30mm

below

the

bottom

water

inlet for pressure

type

radiator, and up

overflow pipe

for

non-pressure

type

one.

Remarkable decrease

cooling water means leak somewhere, hence

the

necessity

repair immediately.

-2-

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