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GROUP INDEX 
GENERAL......... ........................ ......... 
ENGINE ........................ ..................... 
LUBRICATION.............. ............ ......... 
FUEL AND ENGINE CONTROL ....... 
ELECTRONICALLY CONTROLLED FUEL 
SYSTEM <Common Rail System> ... ......... 
ELECTRONICALLY CONTROLLED FUEL 
SYSTEM <Vehicle Speed Limitation System 
(Speed limitation device (SLD) function)> ....... 
COOLING ......... ........................ ......... 
INTAKE AND EXHAUST ................... 
EMISSION CONTROL.. ............ ......... 
FOREWORD 
This Shop Manual is published for the information and 
guidance of personnel responsible for maintenance of 
Mitsubishi 4M5 series diesel engine, and includes proce- 
dures 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. 
JUNE 2006 
Applicable models 
4M50T5 
©2006 Mitsubishi Fuso Truck & Bus Corporation 
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00-1 
GROUP 00 GENERAL 
EQUIPMENT TYPE CODING SYSTEM ............................................. 00-2 
HOW TO READ THIS MANUAL ........................................................ 00-4 
ENGINE NUMBER ............................................................................ 00-9 
PRECAUTIONS FOR MAINTENANCE OPERATION ..................... 00-10 
JACKING UP THE VEHICLE........................................................... 00-20 
DIAGNOSIS CODES 
1. Diagnosis Codes ...................................................................... 00-22 
2. Using Multi-Use Tester .............................................................. 00-22 
3. Use of Blinking Warning Lamp for Diagnosis Code .... ... .... ....... ... 00-26 
TABLE OF STANDARD TIGHTENING TORQUES ......................... 00-30 
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00-2 
Model code indica- 
tion in this manual 
Model code indication on name plate 
Code explanation 
4M50-T5 
4 
M 
5 
0 
T 
5 
Classification of turbocharger 
Turbocharged 
Order of development within same series 
Order of development among different series 
Diesel engine 
No. of cylinders (4) 
EQUIPMENT TYPE 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 procedure 
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 clearance 
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 understanding. 
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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00-6 
Symbol 
Denotation 
Application 
Remarks 
Tightening torque 
Parts not tightened to standard torques 
(standard torques specified where neces- 
sary for servicing) 
Specified values shown in table 
See Table of Standard Tightening Torques for 
parts for which no tightening torques are speci- 
fied. 
Locating pin 
Parts to be positioned for installation 
Non-reusable parts Parts not to be reused 
Lubricant and/or 
sealant 
Parts to be coated with lubricant or sealant 
for assembly or installation 
Necessary lubricant and/or sealant, quantity re- 
quired, etc. are specified in table. 
Special tool 
Parts for which special tools are required for 
service operation 
Tool name/shape and part number are shown in 
table. 
*a Associated part 
Parts associated with those removed/disas- 
sembled for servicing 
HOW TO READ THIS MANUAL 
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