This is a COMPLETE Service Shop Repair Manual for the KOMATSU GD610, GD620, GD660, GD670 SERIES MOTOR GRADER. This manual contains deep information about maintaining, assembly, disassembly and servicing your KOMATSU GD610, GD620, GD660, GD670 SERIES MOTOR GRADER. MACHINE MODEL SERIAL NUMBER GD621A-1 - 10001 and up GD622A-1 - 20001 and up GD623A-1 - 30001 and up GD625A-1 - 50001 and up GD672A-1 - 20001 and up GD611A-1 - 10001 and up GD613A-1 - 30001 and up GD661A-1 - 10001 and up GD663A-1 - 30001 and up GD621R-1 - 10001 and up GD623R-1 - 30001 and up GD611R-1 - 10001 and up GD613R-1 - 30001 and up GD615A-1 - 50001 and up GD625A-1C - 60001 and up GD625A-1A - 60001 and up GD625A-1B - 65001 and up GD621A, GD611A, GD661A, GD621R, GD623R, GD611R, GD613R-1 mount the S6D105-1 engine. GD622A, GD623A, GD625A, GD672A, GD613A, GD663A, GD625A-1C, GD625A-1A mount the 6D125-1 engine. GD615A-1 mount the S6D110-1 engine. For details of the engine, see the 105 Series Shop Manual, 110 Series Shop Manual and 6D125 Series Shop Manual. CONTENTS AS FOLLOWS: ========== 10 ENGINE 20 POWER TRAIN 40 STEERING SYSTEM 50 BRAKE SYSTEM 60 HYDRAULIC SYSTEM 70 WORK EQUIPMENT 80 ELECTRIC AND ELCTRONIC SYSTEM 90 OTHERS ========== Model Specification: KOMATSU GD610, GD620, GD660, GD670 SERIES MOTOR GRADER Language: English File Format: PDF Total Pages: 698 Requirements: Adobe PDF Reader ZOOM IN/OUT: YES Downloadable: YES Compatible: All Versions of Windows & Mac ============== THIS MANUAL CONTAINS INFORMATION AND DATA TO THIS MODEL. HAS SPECS, DIAGRAMS, AND ACTUAL REAL PHOTO ILLUSTRATIONS, AND SCHEMES, WHICH GIVE YOU COMPLETE STEP BY STEP OPERATIONS ON REPAIR, SERVICING, TECHNICAL MAINTENANCE & TROUBLESHOOTING PROCEDURES FOR YOUR MACHINE. THIS MANUAL OFFERS FULL INFORMATION YOU NEED FOR REPAIR YOUR MACHINE. THE INFORMATION IN THIS MANUAL WILL ENABLE YOU TO FIND TROUBLE AND TO UNDERSTAND HOW TO REPAIR AND MAINTAIN YOUR MACHINE WITHOUT GOING INTO SERVICE. ALL MANUALS ARE WINDOWS VISTA32 AND 64, XP, ME, 98, NT, 2000 COMPATIBLE AND WORK WITH MAC! INSTANT DOWNLOAD UPON RECEIPT OF YOUR PAYMENT.. FIND IT...PRINT IT...USE IT...then Trash it. Tons of pictures and diagrams at your fingertips!! All pages are printable, so run off what you need & take it with you into the garage or workshop. Save Money $$ By doing your own repairs! These manuals make it easy for any skill level WITH THESE VERY EASY TO FOLLOW, STEP-BY-STEP INSTRUCTIONS! INSTANT DOWNLOAD means NO SHIPPING COST or WAITING FOR A CD OR PAPER MANUAL TO ARRIVE IN THE MAIL...YOU WILL RECEIVE THIS MANUAL TODAY VIA INSTANT DOWNLOAD ON COMPLETION OF PAYMENT VIA OUR SECURE PAYMENT PROCESSOR. WE ACCEPT ALL MAJOR CREDIT/DEBIT CARDS/PAYPAL. Looking for some other Service Repair Manual, please check: Thanks for visiting!