WDDE-EN-00 ZX330-5G • 330LC-5G • 350H-5G • 350LCH-5G • 350K-5G • 350LCK-5G HYDRAULIC EXCAVATOR WORKSHOP MANUAL
PRINTED IN JAPAN (K) 2011, 10
URL:http://www.hitachi-c-m.com
ZX
Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TODDE-EN
Technical Manual (Troubleshooting) : Vol. No.TTDDE-EN
Workshop Manual : Vol. No.WDDE-EN
Engine Manual : Vol. No.EDDE-EN
WDDE-EN-00 PART NO.
Hydraulic Excavator
Workshop Manual
330-5G
330LC-5G
350H-5G
350LCH-5G
350K-5G
350LCK-5G
INTRODUCTION
IN-01
To The Reader
Additional References
Manual Composition
Page Number
This manual is written for an experienced technician to
provide technical information needed to maintain and
repair this machine.
Be sure to thoroughly read this manual for correct
product information and service procedures.
Please refer to the other materials (operator’s manual,
parts catalog, engine technical material and Hitachi
training material etc.) in addition to this manual.
This manual consists the Technical Manual, the Workshop
Manual and the Engine Manual.
Information included in the Technical Manual:
Technical information needed for redelivery and delivery,
operation and activation of all devices and systems,
operational performance tests, and troubleshooting
procedures.
Each page has a number, located on the center lower part
of the page, and each number contains the following
information:
Example:
Technical Manual: T 1-3-5
T Technical Manual
1 Section Number
3 Group Number
5 Consecutive Page Number for Each Group
If you have any questions or comments, at if you found
any errors regarding the contents of this manual,
please contact using “Service Manual Revision Request
Form” at the end of this manual. (Note: Do not tear off
the form. Copy it for usage.):
Publications Marketing & Product Support Hitachi
Construction Machinery Co. Ltd.
TEL: 81-29-832-7084
FAX: 81-29-831-1162
E-mail: dc@hitachi-kenki.com
Information included in the Workshop Manual:
Technical information needed for maintenance and
repair of the machine, tools and devices needed for
maintenance and repair, maintenance standards, and
removal / installation and assemble / disassemble
procedures.
Information included in the Engine Manual:
Technical information needed for redelivery and delivery
and maintenance and repair of the machine, operation
and activation of all devices and systems, troubleshooting
and assemble / disassemble procedures.
Workshop Manual: W 1-3-2-5
W Workshop Manual
1 Section Number
3 Group Number
2 Sub Group Number
5 Consecutive Page Number for Each Group
INTRODUCTION
IN-02
Safety Alert Symbol and Headline Notations
In this manual, the following safety alert symbol and
signal words are used to alert the reader to the potential
for personal injury of machine damage.
d
This is the safety alert symbol. When you see this
symbol, be alert to the potential for personal injury.
Never fail to follow the safety instructions prescribed
along with the safety alert symbol.
The safety alert symbol is also used to draw attention to
component/part weights.
To avoid injury and damage, be sure to use appropriate
lifting techniques and equipment when lifting heavy
parts.
d
CAUTION:
Indicated potentially hazardous situation which could, if
not avoided, result in personal injury or death.
IMPORTANT:
Indicates a situation which, if not conformed to the
instructions, could result in damage to the machine.
f
NOTE:
Indicates supplementary technical information or know-
how.
Units Used
Quantity To Convert From Into Multiply By
Length mm in 0.03937
mm ft 0.003281
Volume L US gal 0.2642
L US qt 1.057
m
3
yd
3
1.308
Weight kg lb 2.205
Force N kgf 0.10197
N lbf 0.2248
Torque N·m kgf·m 0.10197
Pressure MPa kgf/cm
2
10.197
MPa psi 145.0
Power kW PS 1.360
kW HP 1.341
Temperature °C °F °C×1.8+32
Velocity km/h mph 0.6214
min
-1
rpm 1.0
Flow rate L/min US gpm 0.2642
mL/rev cc/rev 1.0
f
NOTE: The numerical value in this manual might be
different from the above-mentioned table.
SI Units (International System of Units) are used in this
manual. MKSA system units and English units are also
indicated in parentheses just behind SI units.
Example: 24.5 MPa (250 kgf/cm
2
, 3560 psi)
A table for conversion from SI units to other system units
is shown below for reference purposes.
SYMBOL AND ABBREVIATION
SY-1
Symbol /
Abbreviation
Name Explanation
TO Technical manual (Operational principle) Technical manual (Operational Principle).
TT Technical manual (Troubleshooting) Technical manual (Troubleshooting).
T/M Technical manual Technical manual.
W, W/M Workshop manual Workshop manual (Removal and Installation, Disassembly
and Assembly).
MC Main Controller Main controller. MC controls the engine, pump, and valve
according to the machine operating condition.
ECF Engine Controller Engine controller. ECF controls EC motor according to the
machine operating condition.
GSM Global System for Mobile communications
controller
Communication controller. GSM is a type of wireless
communication system, is used in more than on 100
countries around Europe and Asia, and becomes the factual
global standards of the mobile telephone.
GPS Global Positioning System Global positioning system.
CAN Controller Area Network CAN communication. CAN is a serial communications
protocol internationally-standardized by ISO (International
Organization for Standardization).
A/C Air Conditioner Air conditioner.
OP, OPT Option Optional component.
MPDr. Maintenance Pro Dr. MPDr. is software that troubleshooting, monitoring, and
adjustment.
A/I Auto-Idle Auto-idle.
WU Warming-Up Warming-up.
Li Low (Slow) Idle Slow idle engine speed.
ATT Attachment Attachment. Attachment is optional parts such as breaker,
crusher, and pulverizer in this manual.
HI, Hi High Travel fast position.
LO, Lo Low Travel slow position.
SYMBOL AND ABBREVIATION
SY-2
(Blank)
Recognize Safety Information
These are the SAFETY ALERT SYMBOLS.
When you see these symbols on your machine or in this
manual, be alert to the potential for personal injury.
Follow recommended precautions and safe operating
practices.
Understand Signal Words
On machine safety signs, signal words designating the
degree or level of hazard - DANGER, WARNING, or CAUTION
- are used with the safety alert symbol.
DANGER indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury.
DANGER or WARNING safety signs are located near
specific hazards. General precautions are listed on
CAUTION safety signs.
Some safety signs do not use any of the designated signal
words above after the safety alert symbol are occasionally
used on this machine.
To avoid confusing machine protection with personal
safety messages, a signal word IMPORTANT indicates a
situation which, if not avoided, could result in damage to
the machine.
NOTE: indicates an additional explanation for an
element of information.
SA-1
SAFETY
SA-688
SA-1223
Follow Safety Instructions
Carefully read and follow all safety signs on the machine
and all safety messages in this manual.
Safety signs should be installed, maintained and replaced
when necessary.
If a safety sign or this manual is damaged or missing,
order a replacement from your authorized dealer in the
same way you order other replacement parts (be sure to
state machine model and serial number when ordering).
Learn how to operate the machine and its controls correctly
and safely.
Allow only trained, qualified, authorized personnel to
operate the machine.
Keep your machine in proper working condition.
Unauthorized modifications of the machine may impair
its function and/or safety and affect machine life.
Do not modify any machine parts without authorization.
Failure to do so may deteriorate the part safety, function,
and/or service life. In addition, personal accident,
machine trouble, and/or damage to material caused by
unauthorized modifications will void Hitachi Warranty
Policy.
Never attempt to modify or disassemble the inlet/exhaust
parts and the muffler filter. Avoid giving shocks on the
muffler filter by striking elements with other objects or
dropping the elements. Failure to do so may affect the
exhaust gas purifying device, possibly damaging it or
lowering its performance.
Do not use attachments and/or optional parts or
equipment not authorized by Hitachi. Failure to do so
may deteriorate the safety, function, and/or service life
of the machine. In addition, personal accident, machine
trouble, and/or damage to material caused by using
unauthorized attachments and/or optional parts or
equipment will void Hitachi Warranty Policy.
The safety messages in this SAFETY chapter are intended
to illustrate basic safety procedures of machines. However
it is impossible for these safety messages to cover every
hazardous situation you may encounter. If you have any
questions, you should first consult your supervisor and/
or your authorized dealer before operating or performing
maintenance work on the machine.
SAFETY
SA-2
SA-003
Prepare for Emergencies
Be prepared if a fire starts or if an accident occurs.
Keep a first aid kit and fire extinguisher on hand.
Thoroughly read and understand the label attached on
the fire extinguisher to use it properly.
To ensure that a fire extinguisher can be always used
when necessary, check and service the fire extinguisher
at the recommended intervals as specified in the fire
extinguisher manual.
Establish emergency procedure guidelines to cope with
fires and accidents.
Keep emergency numbers for doctors, ambulance
service, hospital, and fire department posted near your
telephone.
Wear Protective Clothing
Wear close fitting clothing and safety equipment
appropriate to the job.
You may need:
A hard hat
Safety shoes
Safety glasses, goggles, or face shield
Heavy gloves
Hearing protection
Reflective clothing
Wet weather gear
Respirator or filter mask.
Be sure to wear the correct equipment and clothing for the
job. Do not take any chances.
Avoid wearing loose clothing, jewelry, or other items that
can catch on control levers or other parts of the machine.
Operating equipment safely requires the full attention of
the operator. Do not wear radio or music headphones while
operating the machine.
SAFETY
SA-3
SA-437
SA-438
Protect Against Noise
Prolonged exposure to loud noise can cause impairment or
loss of hearing.
Wear a suitable hearing protective device such as
earmuffs or earplugs to protect against objectionable or
uncomfortably loud noises.
Inspect Machine
Inspect your machine carefully each day or shift by walking
around it before you start it to avoid personal injury.
In the walk-around inspection be sure to cover all points
described in the "Inspect Machine Daily Before Starting"
section in the operator’s manual.
SA-434
SAFETY
SA-4
SA-435
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Hitachi ZX 330-5G 330LC-5G 350H-5G 350LCH-5G 350K-5G 350LCK-5G Hydraulic Excavator Service Repair Workshop Manual
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Fast Download Speeds
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Description
This is a highly detailed factory service repair manual for the Hitachi ZX 330-5G 330LC-5G 350H-5G 350LCH-5G 350K-5G 350LCK-5G Hydraulic Excavator. The manual provides step-by-step instructions and detailed illustrations, making it suitable for both do-it-yourself enthusiasts and experienced mechanics. It covers the complete disassembly of the machine, including precautions for disassembling and assembling, tightening torque, painting, bleeding air, pressure release procedure, and preparation.
The maintenance standard section includes upper structure, undercarriage, and front attachment. The upper structure section covers the cab, counterweight, main frame, engine, hydraulic oil tank, fuel tank, pump device, control valve, swing device, pilot valve, solenoid valve, and more. The undercarriage section includes swing bearing, travel device, center joint, track adjuster, upper and lower rollers, and track. The front attachment section covers front attachment, cylinder, and more.
This service repair manual comes in PDF format and is compatible with all versions of Windows and Mac. It is available in English and requires Adobe Reader and WinZip for access. With instant access, this manual is a cost-effective way to ensure the proper functioning of your vehicle.
