Hitachi ZAXIS 135US-6 class User manual

ENMDAT-MX1-8ZX135US-6 • 225USLC-6 • 345USLC-6 class HYDRAULIC EXCAVATOR OPERATOR'S MANUAL
URL:http://www.hitachi-c-m.com
PRINTED IN JAPAN (K) 2022, 03
Serial No.
ZX135US-6 class 100001 and up
ZX225US-6 class 500001 and up
ZX345US-6 class 500001 and up
ENMDAT-MX1-8
PART NO.
Operator's Manual
Hydraulic Excavator
135US-6 class
135US-6
225US-6 class
225USLC-6
345US-6 class
345USLC-6

©2022 Hitachi Construction Machinery Co., Ltd.
All rights reserved.
INTRODUCTION
All information, illustrations and specifications in this manual are based on the latest product information available at the
time of publication. The right is reserved to make changes at any time without notice.
Read this manual carefully to learn how to operate and
service your machine correctly. Failure to do so could
result in personal injury or machine damage.
This standard specification machine can be operated
under the following conditions without being modified.
Atmospheric Temperature: –20 °C to 40 °C (–4 °F to 104 °F)
Altitude: 0 m to 2000 m (0 ft to 6600 ft)
In case the machine is used under conditions other than
described above, consult your authorized dealer.
This manual should be considered a permanent part of
your machine and should remain with the machine when
you sell it.
This machine is of metric design. Measurements in this
manual are metric. Use only metric hardware and tools as
specified.
Right-hand and left-hand sides are determined by
facing in the direction of forward travel.
Write product identification numbers in the Machine
Numbers section. Accurately record all the numbers
to help in tracing the machine should it be stolen.
Your dealer also needs these numbers when you order
parts. If this manual is kept on the machine, also file the
identification numbers in a secure place off the machine.
Be sure to use fuel that complies with JIS K-2204, EN-590
or ASTM D-975 which contains 15 ppm or lower sulfur.
Also use fuel that complies with solid contamination level
of class 18/16/13 of ISO4406-1999 (solid contamination
includes dust). If the fuel specified above is not used,
exhaust gas that exceeds the regulation values may be
discharged, causing serious problem on the engine.
Consult your authorized dealer.
A standard specification machine is not intended to
be used in applications such as demolition for which
additional safety measures are necessary (e.g. protective
guards, glazing). Consult your authorized dealer for
information on available parts.
Warranty is provided as a part of Hitachi’s support
program for customers who operate and maintain their
equipment as described in this manual. The warranty is
explained on the warranty certificate which you should
have received from your dealer.
This warranty provides you the assurance that Hitachi
will back its products where defects appear within the
warranty period. In some circumstances, Hitachi also
provides field improvements, often without charge to the
customer, even if the product is out of warranty.
Should the equipment be abused, or modified to
change its performance beyond the original factory
specifications, the warranty will become void and field
improvements may be denied.
Setting fuel delivery above specifications or otherwise
overpowering machines will result in such action.
Only qualified, experienced operators officially licensed
(according to local law) should be allowed to operate
the machine. Moreover, only officially licensed personnel
should be allowed to inspect and service the machine.
PRIOR TO OPERATING THIS MACHINE, INCLUDING
COMMUNICATION SYSTEM, IN A COUNTRY OTHER
THAN A COUNTRY OF ITS INTENDED USE, IT MAY
BE NECESSARY TO MAKE MODIFICATIONS TO IT SO
THAT IT COMPLIES WITH THE LOCAL REGULATORY
STANDARDS (INCLUDING SAFETY STANDARDS)
AND LEGAL REQUIREMENTS OF THAT PARTICULAR
COUNTRY. PLEASE DO NOT EXPORT OR OPERATE
THIS MACHINE OUTSIDE OF THE COUNTRY OF ITS
INTENDED USE UNTIL SUCH COMPLIANCE HAS
BEEN CONFIRMED. PLEASE CONTACT HITACHI
CONSTRUCTION MACHINERY CO., LTD. OR ANY OF
OUR AUTHORIZED DISTRIBUTOR OR DEALER IF YOU
HAVE ANY QUESTIONS CONCERNING COMPLIANCE.
In this manual, urea water is indicated as DEF/
AdBlue®.
“DEF” stands for the Diesel Exhaust Fluid.
AdBlue® is a registered trademark of the Verband der
Automobilindustrie e.V. (VDA).
Jubilee® is a registered trademark of the L Robinson & Co
(Gillingham) Limited.
Hycolin® is a registered trademark of the USUI CO., LTD.

INDEX
ENMDAT-MX1-8
VISIBILITY MAP
MACHINE NUMBERS
SAFETY
SAFETY SIGNS
NAME OF COMPONENTS
GETTING ON AND OFF THE MACHINE
OPERATOR’S STATION
BREAK-IN
OPERATING THE ENGINE
DRIVING THE MACHINE
OPERATING THE MACHINE
TRANSPORTING
MAINTENANCE
MAINTENANCE UNDER SPECIAL ENVIRONMENTAL CONDITIONS
STORAGE
TROUBLESHOOTING
SPECIFICATIONS
OPTIONAL ATTACHMENTS AND DEVICES
INDEX

CONTENTS
MACHINE NUMBERS .........................................................1
SAFETY .......................................................................... S-1
Recognize Safety Information ....................................................S-1
Understand Signal Words.............................................................S-1
Follow Safety Instructions............................................................S-2
Prepare for Emergencies...............................................................S-3
Wear Protective Clothing..............................................................S-3
Protect Against Noise ....................................................................S-4
Inspect Machine ..............................................................................S-4
General Precautions for the Cab................................................S-5
Use Handholds and Steps ............................................................S-6
Adjust the Operator's Seat ...........................................................S-6
Ensure Safety Before Rising from or Leaving
Operator’s Seat ...........................................................................S-7
Fasten Your Seat Belt......................................................................S-7
Move and Operate Machine Safely...........................................S-8
Operate Only from Operator's Seat ..........................................S-8
Jump Starting ...................................................................................S-9
Keep Riders off Machine ...............................................................S-9
Precautions for Operations....................................................... S-10
Investigate Job Site Beforehand ............................................. S-11
Install OPG Guard......................................................................... S-12
Restriction of Attachment Installation ................................. S-12
Provide Signals for Jobs Involving Multiple Machines....S-13
Confirm Direction of Machine to Be Driven........................ S-13
Drive Machine Safely................................................................... S-14
Avoid Injury from Rollaway Accidents.................................. S-16
Avoid Injury from Back-Over and Swing Accidents ......... S-17
Keep People Clear from Working Area ................................. S-18
Never Position the Bucket Over Anyone.............................. S-18
Avoid Undercutting..................................................................... S-19
Avoid Tipping................................................................................. S-19
Never Undercut a High Bank.................................................... S-20
Dig with Caution........................................................................... S-20
Operate with Caution ................................................................. S-20
Avoid Power Lines........................................................................ S-21
Precautions for Lightning.......................................................... S-21
Object Handling ........................................................................... S-22
Protect Against Flying Debris and Falling Object............. S-23
Park Machine Safely..................................................................... S-24
Handle Fluids Safely−Avoid Fires............................................ S-24
Transport Safely ............................................................................ S-25
Practice Safe Maintenance........................................................ S-26
Warn Others of Service Work ................................................... S-27
Support Machine Properly........................................................ S-27
Stay Clear of Moving Parts ........................................................ S-28
Prevent Parts from Flying .......................................................... S-28
Avoid Injury from Attachment Falling Accident ............... S-29
Prevent Burns................................................................................. S-29
Replace Rubber Hoses Periodically........................................ S-30
Avoid High-Pressure Fluids....................................................... S-30
Prevent Fires................................................................................... S-31
Evacuating in Case of Fire.......................................................... S-33
Beware of Exhaust Fumes.......................................................... S-33
Precautions for Welding and Grinding ................................. S-34
Avoid Heating Near Pressurized Fluid Lines ....................... S-35
Avoid Applying Heat to Lines Containing
Flammable Fluids.................................................................... S-35
Precautions for Handling Accumulator and
Gas Damper .............................................................................. S-35
Remove Paint Before Welding or Heating ........................... S-36
Beware of Asbestos and Silica Dust and Other
Contamination......................................................................... S-36
Prevent Battery Explosions ....................................................... S-37
Service Air Conditioning System Safely ............................... S-37
Handle Chemical Products Safely........................................... S-38
Dispose of Waste Properly......................................................... S-38
Never Ride Attachment.............................................................. S-39
Notes on Aftertreatment Device ............................................ S-39
Precautions for Communication Terminal........................... S-39
Precautions for Communication Terminal Equipment ... S-40
Notes on Protection of Operator’s Station when the
Machine Rolls Over................................................................. S-42
VISIBILITY MAP ........................................................... S-43
SAFETY SIGNS ............................................................. S-49
NAME OF COMPONENTS .............................................. 1-1
GETTING ON AND OFF THE MACHINE ......................... 1-2
OPERATOR'S STATION................................................... 1-3
About Aftertreatment Device.....................................................1-3
Cab Features......................................................................................1-6
Cab Features......................................................................................1-7
Multi Function Monitor.................................................................1-8
Default Setting .................................................................................1-9
Basic Screen.................................................................................... 1-10
How to Use Screens.....................................................................1-11
Displaying Basic Screen........................................................ 1-11
Hour Meter................................................................................ 1-14
Clock............................................................................................1-14
Fuel Gauge ................................................................................1-14
DEF/AdBlue® Gauge............................................................... 1-15
DEF/AdBlue® Level Alarm ...................................................1-15
Coolant Temperature Gauge .............................................. 1-16
Operating Status Icon Display............................................1-16
Security Functions (Optional).................................................. 1-17
Input Password ........................................................................1-17
Extending Password Duration Time.................................1-18
Alarm Occurrence Screen.......................................................... 1-19
Remedy............................................................................................1-21
Urea SCR System Remedy ......................................................... 1-24
Aftertreatment Device................................................................ 1-26
Aftertreatment Device Condition Display ..................... 1-26
Aftertreatment Device Manual
Regeneration Request.....................................................1-27
Manual Regeneration Procedure ...................................... 1-28
Main Menu......................................................................................1-29
Engine Output Restriction Suspend...................................... 1-30
Urea SCR System Troubleshooting......................................... 1-32
Air Conditioner.............................................................................. 1-34
Circulation Air Mode.............................................................. 1-34

CONTENTS
Air Conditioner ON/OFF....................................................... 1-34
Radio................................................................................................. 1-35
Work Mode .....................................................................................1-36
Attachment Selection ...........................................................1-36
Mail (Optional)...............................................................................1-37
Setting Menu .................................................................................1-39
Date and Time................................................................................1-40
Time Adjustment ....................................................................1-40
Date Adjustment..................................................................... 1-42
Display Mode Setting............................................................1-44
Attachment Adjustment............................................................ 1-46
Flow Rate Adjustment...........................................................1-46
Priority (arm roll-out)............................................................. 1-48
Priority (arm roll-in) (Except ZX135US-6) .......................1-50
Attachment Name Input............................................................ 1-52
Auto Shut-Down...........................................................................1-54
Auto Shut-Down: ON/OFF ................................................... 1-54
Auto Shut-Down: Setting Time..........................................1-55
Aftertreatment Device Regeneration Inhibited................ 1-56
Setting Procedure...................................................................1-56
Password Change (Optional)....................................................1-58
Sub Meter........................................................................................1-62
Brightness Adjustment...............................................................1-64
Language Settings.......................................................................1-66
Lists of Display Language.......................................................... 1-68
Unit Selection ................................................................................1-69
Display Item Selection (Rear View Camera OFF)...............1-71
Main Menu Sequence Change ................................................1-73
Information Menu........................................................................1-75
Operation ........................................................................................1-76
Fuel Consumption ..................................................................1-76
Breaker Operation ..................................................................1-78
Attachment Operation..........................................................1-80
Travel Operation......................................................................1-82
Actual operation ..................................................................... 1-84
Maintenance ..................................................................................1-82
Remaining Time and Maintenance Interval .................. 1-88
Monitoring......................................................................................1-90
Switch Panel................................................................................... 1-92
Return to Previous Screen Switch (Monitor).................1-93
Return to Basic Screen Switch (Monitor)........................ 1-93
Selector Knob (Monitor)....................................................... 1-93
Temperature Control Switch/Mode Switch
(Air Conditioner) ................................................................1-93
AUTO/OFF Switch/Fan Switch (Air Conditioner).......... 1-93
AM/FM Selector/Tuning Switch (Radio).......................... 1-95
Power Switch/Volume Control Knob (Radio)................ 1-95
Engine Control Dial ................................................................1-95
Auto-Idle Switch...................................................................... 1-95
Travel Mode Switch................................................................1-95
Power Mode Switch ............................................................... 1-96
Work Light Switch................................................................... 1-96
Wiper/Washer Switch ............................................................1-97
USB Power Supply Port......................................................... 1-98
Numeric Keypad...................................................................... 1-99
Switch Panel (for Optional Equipments)............................1-100
Travel Alarm Deactivation Switch (Optional)..............1-101
Rear Light Switch ..................................................................1-101
Perimeter Lights Switch (Optional) ................................1-101
Seat Heater Switch (Optional) ..........................................1-102
Electrical Control Main Switch .........................................1-103
Key Switch.....................................................................................1-104
Power Boost Switch...................................................................1-104
Horn Switch..................................................................................1-104
Electrical Control Main Switch...............................................1-105
AUX Function Lever 1 ..........................................................1-106
Cigar Lighter.................................................................................1-107
Using Cigar Lighter...............................................................1-107
Cab Light Switch.........................................................................1-108
Pilot Control Shut-Off Lever ...................................................1-109
Control Lever Auto-Lock..........................................................1-110
Engine Stop Switch....................................................................1-111
Fuse Box.........................................................................................1-112
Auto Air Conditioner .................................................................1-113
Features:...................................................................................1-113
Name of Components.........................................................1-114
Controller Part Name and Function ...............................1-115
Cab Heater Operation .........................................................1-117
Cooling Operation................................................................1-118
Defroster Operation.............................................................1-119
Cool Head/Warm Feet Operation....................................1-119
Tips for Optimal Air Conditioner Usage .............................1-120
For Rapid Cooling .................................................................1-120
When Windows Become Misty.........................................1-120
Off-Season Air Conditioner Maintenance....................1-120
AM/FM Radio Operation..........................................................1-121
Controls on the Radio..........................................................1-121
Tuning Procedure .................................................................1-121
Station Presetting Procedure............................................1-122
Station Auto-Presetting Procedure ................................1-123
TONE Control..........................................................................1-124
Audio Input...................................................................................1-125
Aerial Angle Monitor.................................................................1-126
Switching the Screen Display ................................................1-128
Description of Images...............................................................1-129
Cab Door Release Lever ...........................................................1-133
Opening/Closing and Removing Cab Inside Window ..1-134
Opening Upper Front Window..............................................1-135
Removing and Storing Lower Front Window...................1-136
Opening Side Window..............................................................1-137
Opening and Closing the Roll Screen
(for Front and Right Windows) (Optional)....................1-138
How to Use on the Front Window...................................1-138
How to Store on Right Window Side..............................1-140
How to Use on Right Window Side.................................1-140
How to clean the screen.....................................................1-140
Opening/Closing Overhead Window (Clear Hatch).......1-141
Emergency Exit ...........................................................................1-142
Opening and Closing the OPG Front Guard
(Optional).................................................................................1-143
Adjusting Operator’s Seat .......................................................1-144
Seat Height and Angle Adjustment ...............................1-144

CONTENTS
Console and Seat Fore-aft Adjustment.........................1-144
Seat Fore-Aft Adjustment ..................................................1-144
Suspension Adjustment .....................................................1-144
Backrest Adjustment ...........................................................1-145
Armrest Adjustment ............................................................1-145
Adjusting Operator’s Seat (Optional)..................................1-146
Adjusting Seat Height.........................................................1-146
Console and Seat Fore-aft Adjustment.........................1-146
Seat Fore-Aft Adjustment ..................................................1-146
Suspension Adjustment .....................................................1-147
Fore-Aft Position Adjustment of Seat Surface............1-147
Angle Adjustment of Seat Surface..................................1-147
Backrest Adjustment ...........................................................1-147
Armrest Adjustment ............................................................1-147
Console Height Adjustment...................................................1-148
Adjusting Procedures..........................................................1-148
Installation and Adjustment of Mirrors ..............................1-149
Mirror Installation Diagram...............................................1-150
Seat Belt.........................................................................................1-157
Battery Disconnect Switch......................................................1-158
Switch Operation ..................................................................1-160
BREAK-IN ....................................................................... 2-1
Observe Engine Operation Closely...........................................2-1
Every 8 Hours or Daily....................................................................2-1
After the First 50 Hours .................................................................2-1
After the First 100 Hours...............................................................2-1
OPERATING THE ENGINE .............................................. 3-1
Inspect Machine Daily Before Starting ....................................3-1
Before Starting Engine ..................................................................3-3
Starting the Engine.........................................................................3-4
Check Instruments After Starting........................................... 3-10
Using Booster Batteries.............................................................. 3-11
Stopping the Engine ................................................................... 3-13
Engine Auto-Stop in Extremely Low Temperature...........3-14
DRIVING THE MACHINE ................................................ 4-1
Travel Levers and Pedals...............................................................4-1
Travel Mode Switch ........................................................................4-3
Travel Alarm (Optional) .................................................................4-3
Operating on Soft Ground ...........................................................4-4
Raising the Machine with Boom and Arm..............................4-4
Retrieval..............................................................................................4-5
Operating in Water or Mud..........................................................4-6
Parking the Machine on Slopes..................................................4-7
Parking the Machine ......................................................................4-7
Prohibition of Sudden Control Operations
when Traveling at High Speed ..............................................4-8
Prohibition of Traveling for Long Periods...............................4-8
OPERATING THE MACHINE........................................... 5-1
Control Lever (ISO Pattern) ..........................................................5-1
Pilot Control Shut-Off Lever ........................................................5-2
Warming-Up Operation ................................................................5-3
Engine Speed Control....................................................................5-4
Auto-Idle.............................................................................................5-5
Auto-Idle Function ....................................................................5-5
Auto-Idle ON/OFF......................................................................5-6
Auto Shut-Down..............................................................................5-7
Aftertreatment Device Manual Regeneration ................... 5-10
Work Mode .....................................................................................5-12
Power Boost Switch.....................................................................5-15
Power Mode ...................................................................................5-16
Operating Backhoe......................................................................5-17
Shovel............................................................................................... 5-18
Grading Operation....................................................................... 5-19
Do Not Strike the Ground with Bucket Teeth.....................5-20
Avoid Hammer Work ................................................................... 5-20
Avoid Abusive Operation ..........................................................5-21
Never Move an Object Sideways with the Bucket............5-21
Retracting the Arm and Bucket............................................... 5-22
Do Not Use Wide Track Shoes on Rough Ground ............. 5-22
Shackle Hole Usage ..................................................................... 5-23
Pilot Accumulator Functions (Optional)...............................5-24
How to Lower Boom in Case of Emergency and
When Engine Stops................................................................5-25
Precautions for After Operations............................................5-26
TRANSPORTING ............................................................ 6-1
Transporting by Road ....................................................................6-1
Loading/Unloading on a Trailer .................................................6-2
Fastening Machine for Transporting ........................................6-5
Unloading ..........................................................................................6-6
Lifting Machine ................................................................................6-7
MAINTENANCE.............................................................. 7-1
Correct Maintenance and Inspection Procedures...............7-1
Layout..................................................................................................7-3
Layout..................................................................................................7-4
Check the Hour Meter Regularly................................................7-5
Maintenance Guide Table .......................................................7-6
Preparations for Inspection and Maintenance .................. 7-10
Hood and Access Covers............................................................7-11
Maintenance Guide ..................................................................... 7-14
Periodic Replacement of Parts................................................. 7-20
Kind of Oils...................................................................................... 7-21
Brand Names of Recommended Grease.........................7-21
Recommended Engine Oil...................................................7-21
Brand Names of Recommended Oil................................. 7-22
Brand Names of Recommended Hydraulic Oil.............7-22
Recommended Oil Viscosity ...............................................7-23
List of Consumable Parts ...........................................................7-24
A. Greasing......................................................................................7-30
Front Joint Pins ........................................................................ 7-30
Swing Bearing ..........................................................................7-32
Swing Internal Gear................................................................7-33
Electric Grease Gun (Nickel-Cadmium Battery)
(Only ZX345US-6 class).........................................................7-35
Electric Grease Gun......................................................................7-37
Components Name................................................................ 7-38
Battery Charger Operation..................................................7-39
Charger Lamps......................................................................... 7-39
Electric Grease Gun (Lithium-ion Battery)

CONTENTS
(Only ZX345US-6 class).........................................................7-44
Electric Grease Gun......................................................................7-46
Components Name................................................................ 7-47
Battery Charger Operation..................................................7-48
Charger Lamps......................................................................... 7-48
B. Engine.......................................................................................... 7-53
Check Engine Oil Level..........................................................7-53
Change Engine Oil .................................................................7-55
Replace Engine Oil Filter....................................................... 7-55
Sampling the Engine Oil (Only ZX225USLC-6)................... 7-58
Check and Clean Around the Engine...............................7-59
Replace Oil Separator Element (Only ZX135US-6)...... 7-59
C. Transmission.............................................................................. 7-60
Pump Transmission (Except ZX135US-6)........................ 7-60
Swing Reduction Gear ..........................................................7-61
Travel Reduction Gear...........................................................7-62
D. Hydraulic System..................................................................... 7-64
Inspection and Maintenance of Hydraulic Equipment... 7-64
Check Hydraulic Oil Level ....................................................7-67
Change Hydraulic Oil............................................................. 7-68
Sampling the Engine Oil............................................................7-69
Bleed Air from the Hydraulic System...............................7-70
Suction Filter Cleaning.......................................................... 7-71
Replace Full-Flow Filter......................................................... 7-72
Replace Pilot Oil Filter............................................................7-73
Replace Air Breather Element............................................. 7-74
Check Hoses and Lines .........................................................7-75
E. Fuel System ................................................................................ 7-79
Recommended Fuel...............................................................7-79
Drain Fuel Tank Sump............................................................7-81
Drain Fuel Pre-Filter................................................................7-82
Replace Fuel Main Filter Element...................................... 7-85
Replace Fuel Pre-Filter Element......................................... 7-87
Check Fuel Hoses .................................................................... 7-89
F. Air Cleaner...................................................................................7-90
Clean and Replace Air Cleaner Element (Outer).......... 7-90
Replace Air Cleaner Element (Inner) ................................7-92
G. Cooling System ........................................................................ 7-93
Check Coolant Level ..............................................................7-94
Check and Adjust Fan Belt Tension...................................7-96
Change Coolant.......................................................................7-98
Clean Radiator/Oil Cooler/Inter Cooler Core...............7-100
Clean Oil Cooler, Radiator and Inter Cooler
Front Screen ......................................................................7-102
Clean Air Conditioner Condenser...................................7-102
Clean Fuel Oil Cooler ...........................................................7-102
Drain Intercooler (only ZX135US-6) ...............................7-103
H. Electrical System....................................................................7-104
Battery.......................................................................................7-105
Replace Battery......................................................................7-108
Check Electrolyte Specific Gravity ..................................7-109
Replacing Fuses.....................................................................7-110
Fuse Box.........................................................................................7-111
I. Miscellaneous...........................................................................7-113
Check and Replace Bucket Teeth ....................................7-113
Change Bucket.......................................................................7-115
Convert Bucket Connection Into Face Shovel............7-116
Adjust Bucket Linkage ........................................................7-117
Remove Travel Levers ..........................................................7-118
Check and Replace Seat Belt.............................................7-118
Check Windshield Washer Fluid Level ...........................7-119
Check Track Sag.....................................................................7-120
Clean and Replace Air Conditioner Filter .....................7-125
Check Air Conditioner.........................................................7-128
Clean Cab Floor......................................................................7-130
Retighten Cylinder Head Bolt...........................................7-131
Inspect and Adjust Valve Clearance...............................7-131
Measure Engine Compression Pressure........................7-131
Check Starter and Alternator............................................7-131
Check and Replace EGR Device .......................................7-131
EGR Cooler Cleaning............................................................7-131
Check Turbo Charger...........................................................7-131
Check and Clean Injector ...................................................7-132
Check Gas Damper...............................................................7-132
Tightening and Retightening Torque of
Nuts and Bolts...................................................................7-132
J. Aftertreatment Device..........................................................7-161
Check and Clean Aftertreatment Device......................7-161
K. Urea SCR System....................................................................7-162
Check DEF/AdBlue®..............................................................7-164
Refill DEF/AdBlue®................................................................7-164
Clean Filler Port Strainer.....................................................7-167
Change DEF/AdBlue® ..........................................................7-168
Replace DEF/AdBlue® Supply Module Main Filter ....7-169
Replace DEF/AdBlue® Tank Water Supply
Inlet Filter ...........................................................................7-171
Replace the DEF/AdBlue® back flow line filter ...........7-172
L. Aerial Angle..............................................................................7-173
Daily Checks of Aerial Angle Camera Images.............7-173
Checking Aerial Angle Camera Images.........................7-174
MAINTENANCE UNDER SPECIAL ENVIRONMENTAL
CONDITIONS ................................................................. 9-1
STORAGE ..................................................................... 10-1
Storing the Machine.................................................................... 10-1
TROUBLESHOOTING................................................... 11-1
SPECIFICATIONS ......................................................... 12-1
Specifications.................................................................................12-1
ZX135US-6................................................................................. 12-1
Working Ranges (Grouser shoe)..............................................12-2
ZX135US-6................................................................................. 12-2
Shoe Types and Applications ................................................... 12-3
ZX135US-6................................................................................. 12-3
Bucket Types and Applications ...............................................12-4
ZX135US-6................................................................................. 12-4
Specifications.................................................................................12-5
ZX225USLC-6............................................................................12-5
Working Ranges (Grouser shoe)..............................................12-6
ZX225USLC-6............................................................................12-6
Shoe Types and Applications ................................................... 12-7
ZX225USLC-6............................................................................12-7

CONTENTS
Bucket Types and Applications ...............................................12-8
ZX225USLC-6............................................................................12-8
Specifications.................................................................................12-9
ZX345USLC-6............................................................................12-9
Working Ranges..........................................................................12-10
ZX345USLC-6..........................................................................12-10
Shoe Types and Applications .................................................12-11
ZX345USLC-6..........................................................................12-11
Bucket Types and Applications .............................................12-12
ZX345USLC-6..........................................................................12-12
OPTIONAL ATTACHMENTS AND DEVICES................. 13-1
Using Pad Crawler Shoe.............................................................13-1
Traveling and Other Cautions.................................................. 13-2
Transporting................................................................................... 13-3
Precautions for Transporting Machines with
Pad Crawler Shoes .................................................................. 13-3
Long Arm Operation ................................................................... 13-8
Blade Lever .....................................................................................13-9
Avoid Hitting Blade with Front-End Attachment............13-10
Blade Maintenance....................................................................13-11
Specifications...............................................................................13-12
ZX135US-6 with Blade ........................................................13-12
Working Ranges..........................................................................13-13
ZX135US-6 with Blade ........................................................13-13
Shoe Types and Applications .................................................13-14
ZX135US-6 with Blade ........................................................13-14
Specifications...............................................................................13-15
ZX225USLC-6 with Blade....................................................13-15
Working Ranges (Grouser shoe)............................................13-16
ZX225USLC-6 with Blade....................................................13-16
Shoe Types and Applications .................................................13-17
ZX225USLC-6 with Blade....................................................13-17
Bucket Teeth (Transverse-Type-Pin-Used Type) ..............13-18
Control Lever (4 Way Multi Valve) (Optional)....................13-19
Hydraulic Breaker, Hydraulic Crusher and
Quick Coupler.........................................................................13-20
Piping for Breaker and Crusher .............................................13-21
Operational Procedures for Stop Valves and
Selector Valve. ........................................................................13-21
Secondary Relief Pressure Adjustment ..............................13-22
Precautions for Breaker Operation.......................................13-23
Change Hydraulic Oil and Replace Full-Flow
Filter Element .........................................................................13-27
Precautions for Crusher Operation ......................................13-28
Attachment...................................................................................13-31
Allowable Weight Limits of Installed Attachment ....13-31
Attachment Connection Parts...............................................13-33
Precautions for Arm Roll-In/Bucket Roll-In
Combined Operation ..........................................................13-35
INDEX........................................................................... 14-1

CONTENTS
MEMO
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................

1
MACHINE NUMBERS
The manufacturing Nos. explained in this group is the
individual number (serial No.) given to each machine and main
components. These numbers are requested when inquiring
any information on the machine and/or components. Fill these
serial Nos. in the blank spaces in this group to immediately
make them available upon request.
Machine
TYPE :
PRODUCT
IDENTIFICATION
NUMBER :
Product Identification Number
fNOTE:
*HCMDATA0000100001*
Engine
TYPE :
MFG. NO. :
Marks to indicate the
start and end of the PIN
PRODUCT IDENTIFICATION NUMBER (PIN)
M157-00-001
MDAA-00-001
(ZX225USLC-6)
(ZX135US-6)
M178-00-002
M157-12-008

MACHINE NUMBERS
2
SCR (Selective Catalytic Reduction) Catalyst
TYPE :
MFG. NO. :
ZX225USLC-6
ZX345USLC-6
ZX135US-6
MDC1-00-001
MDC1-00-002
MDC1-01-510

MACHINE NUMBERS
3
DOC (Diesel Oxidation Catalyst)
TYPE :
MFG. NO. :
TYPE :
MFG. NO. :
MDC1-00-002
MDC1-00-001
ZX135US-6
ZX225USLC-6
ZX345USLC-6 MDC1-01-510

MACHINE NUMBERS
4
Travel Motor
TYPE :
MFG. NO. : (L)
MFG. NO. : (R)
Swing Motor
TYPE :
MFG. NO. :
M178-07-047
M178-07-086

MACHINE NUMBERS
5
MDAA-00-003
Hydraulic Pump
TYPE :
MFG. NO. :
ZX135US-6 MDAA-07-072
ZX225USLC-6
MDD5-00-002
ZX345USLC-6

MACHINE NUMBERS
6
MEMO
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................
..................................................................................................................................................................................................

S-1
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 are occasionally used on this machine
that do not use any of the designated signal words
mentioned above after the safety alert symbol.
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.
fNOTE: Indicates an additional explanation for a piece of
information.
SAFETY
SA-1223
SA-2644

SAFETY
S-2
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 safety, function, and/
or service life of the part. 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 aftertreatment device. Avoid shocks to the
element of the aftertreatment device, such as striking
or dropping objects onto the element. 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.
SA-003

SAFETY
S-3
Prepare for Emergencies
Be prepared for a fire or an accident.
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.
SA-437
SA-438

SAFETY
S-4
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
SA-435