Mitsubishi Heavy Industries 4DQ5 Manuale utente

SERVICE

MANUAL

MITSUBISHI

DIESEL

ENGINE

4 5

INDEX

GENERAL

MAJOR DATA AND SPECIFICATIONS

DISASSEMBLY

INSPECTION AND

REPAIR

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

REASSEMBLY

LUBRICATING SYSTEM

COOLING SYSTEM

FUEL

SYSTEM

ELECTRICAL SYSTEM

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

BENCH TEST

MAINTENANCE STANDARDS

SEALANT APPLICATION DATA

102

TIGHTENING TORQUE

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

103

SPECIAL SERVICE TOOLS 105

TROUBLESHOOTING CHART 110

1. Major

component

parts

1-1

Left-hand side view

1-Water

pump

2-Fan

3-Fan

belt

4-Fuel

injection

pump

5-Fuel feed

pump

6-0il

pipe

7-Fuel

inlet

connector

8-Fuel feed

pipe

9-Fuel

filter

GENERAL

10-Fuel

injection

nozzle

11-0il

filler

cap

12-Fuel

injection

pipe

13.Rocker

cover

14-lntake

manifold

15-Fuel

leak-off

pipe

16-Cylinder

head

17-Adjusting

lever

18-Hanger

-1-

19-Crankcase

20-Flywheel

housing

21-0il

pan

22-Drain

plug

23-Control

rack

stopper

24-Governor

25-Starter

402500

1-2 Right-hand side view

402501

l-Cylinder

head

9-0il

filler

cap

l7-Alternator

bracket

2-Crankcase 10-Exhaust

manifold

18-Timing

gear

case

3-1

ndicator

switch

ll-Elbow

19-0il

level gauge

4-Flywheel

housing

l2-Screw

plug

20-0il

pipe

5-Rocker

cover 13-Water

pump

21-0il

bypass alarm

switch

6-0il

filter

14-Fan

22-0il

pan

7-Breather

l5-Fan

belt

23-0il

pipe

8-0il

filler

16-Alternator

-2-

1-3

Longitudinal sectional view

402502

1-Rocker

cover 10-Connecting rod

19-Tappet

Thermostat

case

11-Cran

kshaft

lIey 20-Camshaft

3-Thermostat

12-Crankshaft gear

21-Crankshaft

4-Exhaust

valve

13-Timing

gear

case

22-Flywheel

5-lntake

valve

14-Rocker

shaft

bracket

23-Flywheel

housing

6-Water

pump

15-Rocker

shaft

24-0il

strainer

7-Piston 16-Valve push rod

25-0il

pan

8-Camshaft gear

17-Cylinder

head 26-Drain plug

9-Fan 18-Cran

kcase

-3-

1-4

Transverse sectional view

1-Exhaust

manifold

2-Piston

3-Valve push rod

4-Connecting

rod

5-Tappet

6-Camshaft

7-0il

level gauge

8-0il

pump

9-0il

strainer

10-Rocker

arm

11-Rocker

cover

12-Glow

plug

13-Fuel

injection

nozzle

14-lntake

manifold

15-Fuel

injection

pipe

16-Cylinder

head

-4-

17-Crankcase

18-Fuel

injection

pump

19-Fuel feed

pump

20-Starter

21-Crankshaft

22-0il

pan

-------~------

402503

MAJOR DATA AND SPECIFICATIONS

Engine model

40Q5

Type Water-cooled, 4-stroke, swirl-combustion

chamber type diesel

No.

cylinders-arrangement 4-in line

Bore x stroke mm (in.) 84 x

(3.307 x 3.701)

Piston displacement

cc(cuin.)

2084

(127.l)

Compression ratio

: 1

Compression pressure kg/

2 (psi) 26 (369.7), min (at 150

200 rpm)

Firing order

1-3-4-2

Direction

rotation Counterclockwise

viewed from flywheel side

Burns (fuel) Grade No. 2D diesel fuel (ASTM specification)

Engine oil

Class-CC

or better (API service classification)

Overall length 717.5 (28-1/4)

Dimensions Overall width mm (in.) 562 (22-1/8)

a.I

= Overall height 629.5 (24-3/4)

a.I

(.!)

Weight, dry

(lb) 200 (441)

Cylinder sleeves Dry type made

special cast iron

or integral water-jacket type

No.

piston Compression rings 2

rings Oil ring 1 (w/spring expander)

Valve arrangement Overhead

Open at: 30°

BTDC

Intake valves 50°

ABDC

Valve Close at:

timing Open at: 74°

BBDC

Exhaust valves 30° ATDC

Close at:

Valve clearance (both intake and mm (in.) 0.25 (0.0098)

exhaust valves) (cold)

Starter Electric

Model ND-EP/KS22A

Fuel feed pump

Cam

lift mm (in.) 6 (0.24)

Model PES4A65B

5 Fuel injection Plunger diam mm (in.) 6.5 (0.256)

"til

pump Plunger lead Right

a:i

Cam lift mm (in.) 8 (0.31)

::I

r- Model RUV (for prime power)

Governor Type Centrifugal flyweight, all-speed

Fuel injection Type Throttle

nozzles Type

nozzle holders Bosch

17SD

-5-

Engine model 4DQ5

Type

nozzle tips Bosch

ND-DNOSD21

Fuel injection Spray hole diam mm (in.) 1 (0.04)

Spray angle 0°

nozzles

'1:l

kg/cm2 (psi) 120 +18 (1706 +

= Injection pressure

""-

Fuel filter Paper-element type

Type Trochoid

Speed ratio

crankshaft 1/2

Oil

pump Capacity at oil temp.

50 ± 5°C (122 ± 9°F); liter (cu in.)/ 8.37 (510.8), min/lOOO (pump rpm)

pressure 3 kg/cm2 min/rpm

(42.7 psi)

e At duty run 3 - 4 (42.7 -56.9)

III

Oil

pressure kg/cm2 (psi)

At idling 1 - 2 (14.2 -28.4)

Oil

filter Paper-element type

.sa

Type Piston-valve

3 Relief valve Valve opening kg/cm2 (psi)

pressure 3 ± 0.2 (42.7 ± 2.8)

Refill capacity Oil pan liter 6.5 (1.7)

Oil

filter (U.s. gal) 0.7 (0.18)

Type Piston-valve

Oil

bypass Valve opening

valve

kg/cm2 (psi) 0.8 -1.2 (11.4 -17.1)

pressure

Type Centrifugal type

Water pump Speed ratio

crankshaft 1.3

Capacity liter (cu in.)/ 105 (6408)/3900 (pump rpm)

min/rpm

Type

Wax

e Thermostat Valve opening temperature 76.5 ± 2°C (169.7 ± 3.6°F)

III 90 ± 2°C (194 ±

3.6°p)

Valve lift temperature

.Sf

Type Circular-arc pusher type

'0 No.

blades 6

0 Fan

U Outside diameter mm (in.) 380 (15)

Ratio to crankshaft speed 1.3

Drive belt Type Low-edge cog B

No.

belts 1

Refill capacity (engine water jacket) liter 4.5 (1.2)

(U.S. gal)

-6-

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