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FOREWORD 
This supplement has been prepared to provide information covering general service repairs for HINO 300 
Series which underwent changes in October, 2006. 
Please note that the publications below have also been prepared as relevant service manuals for the 
components and system in these vehicles. 
All information in this manual is based on the latest product information at the time of publication. 
However, specifications and procedures are subject to change without notice. 
If you find any failures in this manual, you are kindly requested to inform us by using the report form on the 
next page. 
Applicable models 
WU300, 302, 340, 410, 412, 420, 422 series 
XZU303 304, 306, 307, 308, 343, 347, 348, 405, 407, 409, 413, 415, 
417, 419, 423, 425, 427 429, 435, 437, 439 series 
Manual Name 
Pub. No. 
Workshop Manual 
S1-YXZE16E 2/4 
Workshop Manual 
S1-YXZE16E 3/4 
Workshop Manual 
S1-YXZE16E 4/4 
Workshop Manual (Electric wiring diagram) 
S1-YXZE16E EWD 
Chassis Workshop Manual 
S1-YXZE05A 1/4 
Chassis Workshop Manual 
S1-YXZE05A 2/4 
Chassis Workshop Manual 
S1-YXZE05A 3/4 
Chassis Workshop Manual 
S1-YXZE05A 4/4 
W04D-J Engine Workshop Manual 
S5-YW04E06B 
N04C-TJ, UE, UH Engine Workshop Manual 
S5-LN04E06A 
M153 Manual Transmission Workshop Manual 
S1-YXZE08A 
M550 Manual Transmission Workshop Manual 
S1-YXZE09C 
Copyright (C) 2010 HINO Motors, Ltd. 
All rights reserved. This book may not be reproduced or copied, in whole or 
in part, without the written permission of Hino Motors, Ltd. 
First Printing: Aug. 2010 
Hino Motors, Ltd. 
A122290E06 
'10.09.03.update 
ADD 
ADD 
CHANGE 
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Repair Manual Quality Report 
Att.) Service Manager, Your Distributor 
Pub. No. 
Name of Dealer 
Problem Description 
Subject 
Issue Date 
Name of Reporter 
Correction Proposal 
A114682E01 
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CAUTION 
This contents does not include all the necessary items about repair and service. This manual is made for 
the use of persons who have special techniques and certifications. If non-specialized or uncertified 
technicians perform repairs or service only using this manual or without proper equipment or tools, this 
may cause severe injury to you or other persons nearby and also cause damage to your customer's 
vehicle. 
In order to prevent dangerous operation and damage to your customer's vehicle, be sure to follow the 
instructions shown below. 
-- This contents must be read thoroughly. It is especially important to have a good understanding of all 
the contents written in the PRECAUTION of "INTRODUCTION" section. 
-- The service method written in this manual is very effective to perform repair and service. When 
performing the operations following the procedures using this manual, be sure to use tools specified 
and recommended. If using non-specified or tools other than recommended tools and service 
methods, be sure to confirm the safety of the technicians and that there is no possibility of causing 
personal injury or damage to the customer's vehicle before starting the operation. 
-- If part replacement is necessary, the part must be replaced with the same part number or equivalent 
part. Do not replace it with an inferior quality part. 
-- It is important to note that this manual contains various "Cautions" and "Notices" that must be carefully 
observed in order to reduce the risk of personal injury during service or repair, or reduce the possibility 
that improper service or repair may damage the vehicle or render it unsafe. It is also important to 
understand that these "Cautions" and "Notices" are not exaggerations and are possible hazardous 
consequences that might result from failure to follow these instructions. 
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INTRODUCTION 
PREPARATION 
SERVICE SPECIFICATION 
N04C-TR,TS,TT,TU,TV,TW ENGINE CONTROL SYSTEM 
W04D-J,TM,TN ENGINE CONTROL SYSTEM 
N04C-TR,TS,TT,TU,TV,TW ENGINE MECHANICAL 
W04D-J,TM,TN ENGINE MECHANICAL 
N04C-TR,TS,TT,TU,TV,TW FUEL 
W04D-J,TM,TN FUEL 
N04C-TR,TS,TT EMISSION CONTROL 
N04C-TU,TV EMISSION CONTROL 
N04C-TW EMISSION CONTROL 
W04D-J,TM,TN EMISSION CONTROL 
N04C-TR,TS,TT INTAKE 
N04C-TU,TV,TW INTAKE 
W04D-TM,TN INTAKE 
N04C-TR,TS,TT EXHAUST 
N04C-TU,TV EXHAUST 
N04C-TW EXHAUST 
W04D,W04D-TM EXHAUST 
W04D-TN EXHAUST 
N04C-TR,TS,TT,TU,TV,TW COOLING 
W04D-TM,TN COOLING 
N04C-TR,TS,TT,TU,TV,TW LUBRICATION 
W04D-TM,TN LUBRICATION 
N04C-TR,TS,TT,TU,TV,TW STARTING 
W04D-TM,TN STARTING 
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N04C-TR,TS,TT,TU,TV,TW CHARGING 
W04D-TM,TN CHARGING 
CLUTCH 
A860E AUTOMATIC TRANSMISSION 
M153 MANUAL TRANSMISSION 
M550 MANUAL TRANSMISSION 
MYY5A MANUAL TRANSMISSION 
MYY6S MANUAL TRANSMISSION 
PROPELLER SHAFT 
FRONT SUSPENSION (IFS) 
FRONT SUSPENSION (LEAF SPRING) 
REAR SUSPENSION 
DIFFERENTIAL 
AXLE 
TIRE AND WHEEL 
BRAKE CONTROL 
BRAKE 
PARKING BRAKE 
POWER STEERING 
AIR CONDITIONING 
METER 
SUPPLEMENTAL RESTRAINT SYSTEM 
AUDIO / VISUAL 
POWER SOURCE / WIRING 
HORN 
INSTRUMENT PANEL / METER 
ENGINE HOOD / DOOR 
ADD 
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EXTERIOR 
POWER TAKE-OFF 
BODY