Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
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Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TODFY50-EN
Technical Manual (Troubleshooting) : Vol. No.TTDFY50-EN
Workshop Manual : Vol. No.WDFY50-EN
Engine Manual : Vol. No.ETDFY50-EN, EWDFY50-EN
Description
Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
FILE DETAILS:
Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
Language :English
Pages :1091
Downloadable : Yes
File Type : PDF
IMAGES PREVIEW OF THE MANUAL:
DESCRIPRION:
Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TODFY50-EN
Technical Manual (Troubleshooting) : Vol. No.TTDFY50-EN
Workshop Manual : Vol. No.WDFY50-EN
Engine Manual : Vol. No.ETDFY50-EN, EWDFY50-EN
The machine specification and description according to destination may be explained on this manual.
●Be sure to thoroughly read this manual for correct product information and service procedures.
●If you have any questions or comments, at if you found any errors regarding the contents of this manual, pleasecontact using “Service Manual Revision Request Form” at the end of this manual. (Note: Do not tear off the form. Copythis form for usage.)
•Service Material Development Center Hitach Construction Machinery Co., Ltd.
•TEL: 81-29-832-9673
•FAX: 81-29-831-1162
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.
TABLE OF CONTENTS:
Hitachi ZX 250LC-7 250LCN-7 Hydraulic Excavator Workshop Manual WDFY50 – PDF DOWNLOAD
Service Manual consists of the following separate Part No.
Technical Manual (Operational Principle) : Vol. No.TODFY50-EN
Technical Manual (Troubleshooting) : Vol. No.TTDFY50-EN
Workshop Manual : Vol. No.WDFY50-EN
Engine Manual : Vol. No.ETDFY50-EN, EWDFY50-EN
WDFY50-EN-00 1
INTRODUCTION 0
To The Reader 0
Additional References 0
Manual Composition 0
Page Number 0
Trademark 0
Safety Alert Symbol and Headline Notations 0
Units Used 0
SYMBOL AND ABBREVIATION 0
Symbol and Abbreviation 0
CONTRASTING LIST OF PART NAME 0
Contrasting List of Part Name between Technical Manual and Parts Catalog 0
SAFETY 0
Recognize Safety Information 0
Understand Signal Words 0
Follow Safety Instructions 0
Prepare for Emergencies 0
Wear Protective Clothing 0
Protect Against Noise 0
Inspect Machine 0
General Precautions for the Cab 0
Use Handrail and Steps 0
Adjust the Operator’s Seat 0
Ensure Safety Before Rising from or Leaving Operator’s Seat 0
Fasten Your Seat Belt 0
Move and Operate Machine Safely 0
Start the Engine Only from Operator’s Seat 0
Jump Starting 0
Keep Riders off Machine 0
Precautions for Operations 0
Perform Job Site Risk Assessment Beforehand 0
Install OPG Guard 0
Restriction of Attachment Installation 0
Provide Signals for Jobs Involving Multiple Machines 0
Confirm Direction of Machine Travel 0
Drive Machine Safely 0
Avoid Injury from Rollaway Accidents 0
Avoid Accidents from Reversing and Swing Operation 0
Keep People Clear from Working Area 0
Never Position the Bucket Over Anyone 0
Avoid Undercutting 0
Avoid Tipping 0
Never Undercut a High Bank 0
Dig with Caution 0
Caution with an Overhead Obstacle 0
Avoid Power Lines 0
Precautions for Lightning 0
Object Handling 0
Protect Against Flying Debris and Falling Object 0
Park Machine Safely 0
Handle Fluids Safely−Avoid Fires 0
Transport Safely 0
Practice Maintenance Safely 0
Warn Others of Service Work 0
Support Machine Properly 0
Stay Clear of Moving Parts 0
Prevent Parts from Flying 0
Avoid Injury from Attachment Falling Accident 0
Prevent Burns 0
Replace Rubber Hoses Periodically 0
Avoid High-Pressure Fluids 0
Prevent Fires 0
Check for Oil Leaks: 0
Check for Short circuits: 0
Clean up Flammable Materials: 0
Check Key Switch: 0
Check Heat Shields: 0
Evacuating in Case of Fire 0
Beware of Exhaust Fumes 0
Precautions for Welding and Grinding 0
Avoid Heating Near Pressurized Fluid Lines 0
Avoid Applying Heat to Lines Containing Flammable Fluids 0
Precautions for Handling Accumulator and Gas Damper 0
Remove Paint Before Welding or Heating 0
Beware of Asbestos and Silica Dust and Other Contamination 0
Prevent Battery Explosions 0
Service Air Conditioning System Safely 0
Handle Chemical Products Safely 0
Dispose of Waste Properly 0
Never Ride Attachment 0
Notes on Aftertreatment Device 0
Precautions for Communication Terminal 0
Precautions for Communication Terminal Equipment 0
Notes on Protection by Operator’s Station when the Machine Rolls Over 0
Before Returning the Machine to the Customer 0
SECTION AND GROUP CONTENTS 0
CONTENTS 0
GENERAL 0
Precautions for Disassembling and Assembling 0
Precautions for Disassembling and Assembling 0
Precautions for Using Floating Seal 0
Precautions for Using Nylon Sling 0
Maintenance Standard Terminology 0
Tightening 0
Tightening Bolts and Nuts 0
Bolt Types 0
Specified Tightening Torque Chart 0
Tightening Order 0
Precautions for Spilt Flange 0
Nut and Bolt Locking 0
Tightening Piping Joint 0
Union Joint 0
Pipe Joint 0
O-Ring Face Seal Joint 0
Quick Coupling 0
Screw-In Connection 0
Seal Tape Application 0
Low-Pressure-Hose Clamp Tightening 0
Connecting Hose 0
Painting 0
Painting 0
Bleeding Air 0
Bleeding Air from Hydraulic System 0
Bleeding Air from Pump 0
Bleeding Air from Travel Motor, Swing Motor 0
Bleeding Air from Hydraulic Circuit 0
Bleeding Air from Fuel System 0
Air Bleeding from the Diesel Exhaust Fluid Defrosting Piping 0
Preparation 0
Preparation before Inspection and Maintenance 0
Hydraulic Circuit Pressure Release Procedure 0
Pressure Release from Hydraulic Oil Tank 0
Pressure Release from Expansion Tank 0
MAINTENANCE STANDARD 0
Upperstructure 0
Maintenance Standard for Pump Device 0
Maintenance Standard for Swing Motor 0
Undercarriage 0
Maintenance Standard for Travel Motor 0
Maintenance Standard for Sprocket 0
Maintenance Standard for Front Idler 0
Maintenance Standard for Upper Roller 0
Maintenance Standard for Lower Roller 0
Maintenance Standard for Track 0
Front Attachment 0
Maintenance Standard for Pin and Bushing 0
Maintenance Standard for Side Cutter (2021232, 2021233) 0
Maintenance Standard for Point (4512365) 0
Standard Dimensions for Arm and Bucket Connection 0
Standard Dimensions for Arm and Boom Connection 0
Maintenance Standard for Cylinder 0
UPPERSTRUCTURE 0
Fuel Tank 0
Removal of Fuel Tank 0
Installation of Fuel Tank 0
Pump Device 0
Removal of Pump Device 0
Installation of Pump Device 0
Removal of Coupling 0
Installation of Coupling 0
Disassembly of Pump Device 0
Assembly of Pump Device 0
Disassembly of Regulator 0
Assembly of Regulator 0
Disassembly of Solenoid Valve 0
Assembly of Solenoid Valve 0
Structure of Pilot Pump 0
Control Valve 0
Removal of Control Valve 0
Installation of Control Valve 0
Disassembly of Housing 0
Assembly of Housing 0
Disassembly of Spool (A-Side Control Valve) 0
Assembly of Spool (A-Side Control Valve) 0
Disassembly of Boom Anti-Drift Valve (Check Valve) (j) (A-Side Control Valve) 0
Disassembly of Boom Anti-Drift Valve (Selector Valve) (k) (A-Side Control Valve) 0
Assembly of Boom Anti-Drift Valve (j, k) (A-Side Control Valve) 0
Disassembly of Overload Relief Valve (h, i, ac, ad) (A-Side Control Valve) 0
Assembly of Overload Relief Valve (h, i, ac, ad) (A-Side Control Valve) 0
Disassembly of Travel (Right) Spool (n) (A-Side Control Valve) 0
Assembly of Travel Spool (n) (A-Side Control Valve) 0
Disassembly of Bucket Spool (p) (A-Side Control Valve) 0
Assemble of Bucket Spool (p) (A-Side Control Valve) 0
Disassembly of Arm 2 Spool (q) (A-Side Control Valve) 0
Assembly of Arm 2 Spool (q) (A-Side Control Valve) 0
Disassembly of Boom 1 Spool (r) (A-Side Control Valve) 0
Assembly of Boom 1 Spool (r) (A-Side Control Valve) 0
Disassembly of Boom 3 Spool (s) (A-Side Control Valve) 0
Assembly of Boom 3 Spool (s) (A-Side Control Valve) 0
Disassembly of Swing Spool (t) (A-Side Control Valve) 0
Assembly of Swing Spool (t) (A-Side Control Valve) 0
Disassembly of Arm Roll-In Meter-Out Open Control Spool (aa) (A-Side Control Valve) 0
Assembly of Arm Roll-In Meter-Out Open Control Spool (aa) (A-Side Control Valve) 0
Disassembly of Main Relief Valve (m) (A-Side Control Valve) 0
Assembly of Main Relief Valve (m) (A-Side Control Valve) 0
Disassembly of Bucket Regeneration Cut Valve (g) (A-Side Control Valve) 0
Assembly of Bucket Regeneration Cut Valve (g) (A-Side Control Valve) 0
Disassembly of Check Valve (d, f) (A-Side Control Valve) 0
Assembly of Check Valve (d, f) (A-Side Control Valve) 0
Disassembly of Load Check Valve (e) (A-Side Control Valve) 0
Assembly of Load Check Valve (e) (A-Side Control Valve) 0
Disassembly of Flow Combiner Valve (ae) (A-Side Control Valve) 0
Assembly of Flow Combiner Valve (ae) (A-Side Control Valve) 0
Disassembly of Pump 1 Bypass Shut-Out Valve (ab) (A-Side Control Valve) 0
Assembly of Pump 1 Bypass Shut-Out Valve (ab) (A-Side Control Valve) 0
Disassembly of Check Valves (u, w), Load Check Valves (x, y) (A-Side Control Valve) 0
Assembly of Check Valves (u, w), Load Check Valves (x, y) (A-Side Control Valve) 0
Disassembly of Boom Lower Meter-In Cut Valve (v) (A-Side Control Valve) 0
Assembly of Boom Lower Meter-In Cut Valve (v) (A-Side Control Valve) 0
Disassembly of Load Check Valve (z) (A-Side Control Valve) 0
Assembly of Load Check Valve (z) (A-Side Control Valve) 0
Disassembly and Assembly of Plugs (A-Side Control Valve) 0
Disassembly of Spool (B-Side Control Valve) 0
Assembly of Spool (B-Side Control Valve) 0
Disassembly of Arm Regenerative Valve (j) (B-Side Control Valve) 0
Assembly of Arm Regenerative Valve (j) (B-Side Control Valve) 0
Disassembly of Arm Rod Anti-Drift Valve (Check Valve) (e) (B-Side Control Valve) 0
Disassembly of Arm Rod Anti-Drift Valve (Selector Valve) (d) (B-Side Control Valve) 0
Assembly of Arm Rod Anti-Drift Valve (d, e) (B-Side Control Valve) 0
Disassembly of Overload Relief Valve (f, aa) (B-Side Control Valve) 0
Assembly of Overload Relief Valve (f, aa) (B-Side Control Valve) 0
Disassembly of Main Relief Valve (ai) (B-Side Control Valve) 0
Assembly of Main Relief Valve (ai) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Arm Regenerative Circuit) (ac) (B-Side Control Valve) 0
Assembly of Load Check Valve (Arm Regenerative Circuit) (ac) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Travel (Left) Tandem Circuit) (ag) (B-Side Control Valve) 0
Assembly of Load Check Valve (Travel (Left) Tandem Circuit) (ag) (B-Side Control Valve) 0
Disassembly of Check Valve (Main Relief Circuit) (ah) (B-Side Control Valve) 0
Assembly of Check Valve (Main Relief Circuit) (ah) (B-Side Control Valve) 0
Disassembly of Travel (Left) Spool (g) (B-Side Control Valve) 0
Assembly of Travel (Left) Spool (g) (B-Side Control Valve) 0
Disassembly of Auxiliary 1 Spool (h) (B-Side Control Valve) 0
Assembly of Auxiliary 1 Spool (h) (B-Side Control Valve) 0
Disassembly of Arm 1 Spool (i) (B-Side Control Valve) 0
Assembly of Arm 1 Spool (i) (B-Side Control Valve) 0
Disassembly of Boom 2 Spool (k) (B-Side Control Valve) 0
Assembly of Boom 2 Spool (k) (B-Side Control Valve) 0
Disassembly of Pump 3 Bypass Shut-Out Valve (ae) (B-Side Control Valve) 0
Assembly of Pump 3 Bypass Shut-Out Valve (ae) (B-Side Control Valve) 0
Disassembly of Auxiliary 2 Spool (m) (B-Side Control Valve) 0
Assembly of Auxiliary 2 Spool (m) (B-Side Control Valve) 0
Disassembly of Digging Regenerative Valve (ab) (B-Side Control Valve) 0
Assembly of Digging Regenerative Valve (ab) (B-Side Control Valve) 0
Disassembly of Auxiliary Flow Combiner Valve (z) (B-Side Control Valve) 0
Assembly of Auxiliary Flow Combiner Valve (z) (B-Side Control Valve) 0
Disassembly of Arm Bottom Anti-Drift Valve (Check Valve) (y) (B-Side Control Valve) 0
Disassembly of Arm Bottom Anti-Drift Valve (Selector Valve) (x) (B-Side Control Valve) 0
Assembly of Arm Bottom Anti-Drift Valve (x, y) (B-Side Control Valve) 0
Disassembly of Check Valve (Auxiliary Flow Combiner Circuit) (af) (B-Side Control Valve) 0
Assembly of Check Valve (Auxiliary Flow Combiner Circuit) (af) (B-Side Control Valve) 0
Disassembly of Arm 1 Flow Rate Control Valve (Poppet Valve) (s) (B-Side Control Valve) 0
Disassembly of Arm 1 Flow Rate Control Valve (Selector Valve) (t) (B-Side Control Valve) 0
Assembly of Arm 1 Flow Rate Control Valve (s, t) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Boom 2 Parallel Circuit) (u) (B-Side Control Valve) 0
Assembly of Load Check Valve (Boom 2 Parallel Circuit) (u) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Auxiliary 2 Tandem Circuit) (r) (B-Side Control Valve) 0
Assembly of Load Check Valve (Auxiliary 2 Tandem Circuit) (r) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Travel (Left) Parallel Circuit) (n) (B-Side Control Valve) 0
Assembly of Load Check Valve (Travel Parallel Circuit) (n) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Auxiliary 2 Parallel Circuit) (ad) (B-Side Control Valve) 0
Assembly of Load Check Valve (Auxiliary 2 Parallel Circuit) (ad) (B-Side Control Valve) 0
Disassembly of Load Check Valve (Digging Regenerative Circuit) (w) (B-Side Control Valve) 0
Assembly of Load Check Valve (Digging Regenerative Circuit) (w) (B-Side Control Valve) 0
Disassembly of Auxiliary Flow Rate Control Valve (Poppet Valve) (p) (B-Side Control Valve) 0
Disassembly of Auxiliary Flow Rate Control Valve (Selector Valve) (q) (B-Side Control Valve) 0
Assembly of Auxiliary Flow Rate Control Valves (p, q) (B-Side Control Valve) 0
Disassembly of Auxiliary 2 Hydraulic Pressure Source Control Spool (ak) (B-Side Control Valve) 0
Assembly of Auxiliary 2 Hydraulic Pressure Source Control Spool (ak) (B-Side Control Valve) 0
Disassembly and Assembly of Plugs (B-Side Control Valve) 0
Swing Device 0
Removal of Swing Device 0
Installation of Swing Device 0
Disassembly of Swing Reduction Gear 0
Assembly of Swing Reduction Gear 0
Disassembly of Swing Motor 0
Assembly of Swing Motor 0
Pilot Valve 535
Removal of Pilot Valve (Left) 535
Installation of Pilot Valve (Left) 541
Removal of Pilot Valve (Right) 547
Installation of Pilot Valve (Right) 555
Disassembly of Pilot Valves (Left and Right) 563
Assembly of Pilot Valves (Left and Right) 567
Removal of Travel Pilot Valve 571
Installation of Travel Pilot Valve 573
Disassembly of Travel Pilot Valve 575
Assembly of Travel Pilot Valve 579
UPPERSTRUCTURE 0
Cab 0
Removal of Cab Interior Parts 0
Removal of Cab Exterior Parts 0
Removal of Cab Body 0
Removal of Controller Assembly and Parts Around the Monitor 0
Installation of Controller Assembly and Parts Around the Monitor 0
Installation of Cab Body 0
Installation of Cab Exterior Parts 0
Installation of Cab Interior Parts 0
Dimensions of Cab Glass 0
Procedure to Remove Cab Glass 0
Procedure to Install Cab Glass 0
Procedures to Install Upper Door Glass 0
Procedures to Install Upper Front Glass 0
Counterweight 0
Removal of Counterweight 0
Installation of Counterweight 0
Main Frame 0
Removal of Main Frame 0
Installation of Main Frame 0
Engine 0
Preparation before Removal of Engine 0
Removal of Covers and Related Parts Around the Engine 0
Removal of Wire Harnesses and Hoses Around the Engine 0
Removal of Engine Body 0
Installation of Engine Body 0
Installation of Wire Harnesses and Hoses Around the Engine 0
Installation of Related Parts of the Engine 0
Work after Installation of Engine and Installation of Covers 0
Radiator Assembly 0
Removal of Radiator 0
Installation of Radiator 0
Removal of Intercooler 0
Installation of Intercooler 0
Removal of Oil Cooler 0
Installation of Oil Cooler 0
Hydraulic Oil Tank 0
Removal of Hydraulic Oil Tank 0
Installation of Hydraulic Oil Tank 0
UPPERSTRUCTURE 779
Solenoid Valve 779
Removal of Pilot Shut-Off Solenoid Valve 779
Installation of Pilot Shut-Off Solenoid Valve 781
Disassembly of Pilot Shut-Off Solenoid Valve 783
Assembly of Pilot Shut-Off Solenoid Valve 785
Removal of 5-Spool Solenoid Valve Unit 787
Installation of 5-Spool Solenoid Valve Unit 791
Structure of 5-Spool Solenoid Valve Unit 795
Removal of 2-Spool Solenoid Valve Unit 797
Installation of 2-Spool Solenoid Valve Unit 799
Structure of 2-Spool Solenoid Valve Unit 801
Removal of 3-Spool Solenoid Valve Unit 803
Installation of 3-Spool Solenoid Valve Unit 807
Structure of 3-Spool Solenoid Valve Unit 809
Signal Control Valve 811
Removal of Signal Control Valve 811
Installation of Signal Control Valve 815
Structure of Signal Control Valve 817
Aftertreatment Device 821
Removal of Aftertreatment Device 821
Installation of Aftertreatment Device 831
DEF Tank 843
Removal of DEF Tank 843
Installation of DEF Tank 849
Removal of DEF Tank Suction Filter 855
Installation of DEF Tank Suction Filter 861
Removal of DEF Tank Water Supply Inlet Filter 867
Installation of DEF Tank Water Supply Inlet Filter 869
Assembly of DEF Tank Water Supply Inlet Filter 871
Coolant Control Valve 873
Removal of Coolant Control Valve 873
Installation of Coolant Control Valve 875
DEF Supply Module 877
Removal of DEF Supply Module 877
Installation of DEF Supply Module 881
UNDERCARRIAGE 885
Swing Bearing 887
Removal of Swing Bearing 887
Installation of Swing Bearing 889
Disassembly of Swing Bearing 893
Assembly of Swing Bearing 897
Travel Device 899
Removal of Travel Device 899
Installation of Travel Device 901
Disassembly of Travel Device 903
Assembly of Travel Device 909
Disassembly of Travel Motor 917
Assembly of Travel Motor 921
Disassembly of Brake Valve 927
Assembly of Brake Valve 929
Center Joint 931
Removal of Center Joint 931
Installation of Center Joint 933
Disassembly of Center Joint 935
Assembly of Center Joint 937
Replacement of Body and Spindle 941
Track Adjuster 943
Removal of Track Adjuster 943
Installation of Track Adjuster 945
Disassembly of Front Idler 947
Assembly of Front Idler 951
Disassembly of Track Adjuster 955
Assembly of Track Adjuster 959
Upper and Lower Rollers 963
Removal of Upper Roller 963
Installation of Upper Roller 965
Removal of Lower Roller 969
Installation of Lower Roller 973
Disassembly of Lower Roller 977
Assembly of Lower Roller 981
Track 985
Removal of Track 985
Installation of Track 989
FRONT ATTACHMENT 995
Front Attachment 997
Removal of Front Attachment 997
Installation of Front Attachment1003
Cylinder1009
Removal of Boom Cylinder1009
Installation of Boom Cylinder1013
Disassembly of Boom Cylinder1019
Assembly of Boom Cylinder1023
Removal of Arm Cylinder1025
Installation of Arm Cylinder1029
Disassembly of Arm Cylinder1035
Assembly of Arm Cylinder1039
Removal of Bucket Cylinder1043
Installation of Bucket Cylinder1047
Disassembly of Bucket Cylinder1051
Assembly of Bucket Cylinder1055
Removal of Positioning Cylinder1057
Installation of Positioning Cylinder1061
Disassembly of Positioning Cylinder1065
Assembly of Positioning Cylinder1069
Hose Rupture Valve1071
Removal of Hose Rupture Valve for Boom Cylinder1071
Installation of Hose Rupture Valve for Boom Cylinder1073
Structure of Hose Rupture Valve for Boom Cylinder (Right)1075
Structure of Hose Rupture Valve for Boom Cylinder (Left)1077
Removal of Hose Rupture Valve for Arm Cylinder1079
Installation of Hose Rupture Valve for Arm Cylinder1081
Structure of Hose Rupture Valve for Arm Cylinder1083
Removal of Hose Rupture Valve for Positioning Cylinder1085
Installation of Hose Rupture Valve for Positioning Cylinder1087
Structure of Hose Rupture Valve for Positioning Cylinder1089
SERVICE MANUAL REVISION REQUEST FORM1091
S.M 31/1/25
