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Shop Manual 
diesel engine 
Pub.No.TWDE0720, XXXX 2007 
For Vietnam 
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Shop Manual 
diesel engine 
Pub.No.TWDE0720, XXXX 2007 
For Vietnam 
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GROUP INDEX 
GENERAL......................................... 
ENGINE ............................................ 
LUBRICATION.................................. 
FUEL AND ENGINE CONTROL ...... 
COOLING ......................................... 
INTAKE AND EXHAUST .................. 
FOREWORD 
This Shop Manual is published for the information and 
guidance of personnel responsible for maintenance of 
Mitsubishi Fuso 4D3 series diesel engine, and includes 
procedures for adjustment and maintenance services. 
We earnestly look forward to seeing that this manual is 
made full use of in order to perform correct services with 
no wastage. 
For more details, please consult your nearest authorized 
Mitsubishi Fuso dealer or distributors. 
Kindly note that the specifications and maintenance ser- 
vice figures are subject to change without prior notice in 
line with improvement which will be effected from time to 
time in the future. 
XXXX 2007 
Applicable models 
4D34T4 
4D34T5 
©2007 Mitsubishi Fuso Truck & Bus Corporation 
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This Shop Manual contains the information classified into the following groups. 
1. ENGINE volume 
2. CHASSIS volume 
3. ELECTRICAL volume 
Group No. 
Group subject 
11 
ENGINE 
12 
LUBRICATION 
13 
FUEL AND ENGINE CONTROL 
14 
COOLING 
15 
INTAKE AND EXHAUST 
Group No. 
Group subject 
21 
CLUTCH 
22 
MANUAL TRANSMISSION 
25 
PROPELLER SHAFT 
26 
FRONT AXLE 
27 
REAR AXLE 
31 
WHEEL AND TIRE 
33 
FRONT SUSPENSION 
34 
REAR SUSPENSION 
35 
BRAKE 
36 
PARKING BRAKE 
37 
STEERING 
41 
BUMPER AND FRAME 
42 
CAB MOUNTING AND TILT 
43 
DOOR 
51 
EXTERIOR 
52 
INTERIOR 
55 
HEATER AND VENTILATION 
Group No. 
Group subject 
54 
ELECTRICAL 
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00-1 
GROUP 00 GENERAL 
EQUIPMENT MODEL CODING SYSTEM ......................................... 00-2 
HOW TO READ THIS MANUAL ........................................................ 00-4 
CHASSIS NUMBER, ENGINE NUMBER AND NAME PLATE ......... 00-8 
PRECAUTIONS FOR MAINTENANCE OPERATION ..................... 00-10 
JACKING UP THE VEHICLE........................................................... 00-20 
TABLE OF STANDARD TIGHTENING TORQUES ......................... 00-22 
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00-2 
Model code 
indication in 
this manual 
Model code indication on name plate 
Code explanation 
Engine 
4D34T4 
4 
D 
3 
4 
T 
4 
Power version number 
With turbocharger 
Intra-series sequence of development 
Sequence of development by series 
Diesel engine 
Number of cylinders (4 cylinders) 
EQUIPMENT MODEL CODING SYSTEM 
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MEMO 
00-3 
00 
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00-4 
This manual consists of the following parts: 
Specifications 
Structure and Operation 
Troubleshooting 
On-vehicle Inspection and Adjustment 
Service procedures 
On-vehicle Inspection and Adjustment 
Procedures for inspection and adjustment of individual parts and assemblies as mounted on the vehicle are de- 
scribed including specific items to check and adjust. Specified or otherwise, inspection should be performed for 
looseness, play, backlash, crack, damage, etc. 
Service procedures 
Procedures for servicing components and parts off the vehicle are described centering on key points in their re- 
moval, installation, disassembly, reassembly, inspection, etc. 
Inspection 
Check items subject to "acceptable/unacceptable" judgement on the basis of service standards are all given. 
Some routine visual checks and cleaning of some reused parts are not described but must always be included in 
actual service work. 
Caution 
This service manual contains important cautionary instructions and supplementary information under the following 
four headings which identify the nature of the instructions and information: 
Terms and Units 
Front and rear 
The forward running direction of the vehicle is referred to as the front and the reverse running direction is referred 
to as the rear. 
Left and right 
Left hand side and right hand side, when facing the forward running direction of the vehicle, are respectively left 
and right. 
Standard value 
Standard value dimensions in designs indicating: the design dimensions of individual parts, the standard clear- 
ance between two parts when assembled, and the standard value for an assembly part, as the case may be. 
Limit 
When the value of a part exceeds this, it is no longer serviceable in respect of performance and strength and must 
be replaced or repaired. 
DANGER 
Precautions that should be taken in handling potentially dangerous substances 
such as battery fluid and coolant additives. 
WARNING 
Precautionary instructions, which, if not observed, could result in serious injury or 
death. 
CAUTION 
Precautionary instructions, which, if not observed, could result in damage to or de- 
struction of equipment or parts. 
NOTE 
Suggestions or supplementary information for more efficient use of equipment or 
better understandings. 
HOW TO READ THIS MANUAL 
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00 
00-5 
Tightening torque 
Values are directly specified for out-of-standard tightening torques for bolts and nuts. 
Where there is no specified figure for tightening torque, follow the table covering standard tightening torques. 
(Values for standard tightening torques are based on thread size and material.) 
When the item is to be tightened in a wet state, "wet" is indicated. Where there is no indication, read it as dry. 
Units 
Tightening torques and other parameters are given in SI* units with metric units added in brackets { }. 
*SI: Le Système International d'Unités 
Unit 
SI unit {metric unit} 
Conversion factor 
Force 
N {kgf} 
9.80665 N {1 kgf} 
Moment of force 
N·m {kgf·m} 
9.80665 N·m {1 kgf·m} 
Pressure 
Positive pressure 
kPa {kgf/cm 
2 
} 
98.0665 kPa {1 kgf/cm 
2 
} 
Vacuum pressure 
kPa {mmHg} 
0.133322 kPa {1 mmHg} 
Pa {mmH 
2 
O} 
9.80665 Pa {1 mmH 
2 
O} 
Volume 
dm 
3 
{L} 
1dm 
3 
{1 L} 
Heat quantity 
J {kcal} 
4186.05 J {1 kcal} 
Heat flow 
W {kcal/h} 
1.16279 W {1 kcal/h} 
Power 
kW {PS} 
0.7355 kW {1 PS} 
Example: 390 N·m {40 kgf·m} 
Metric unit 
SI unit 
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