Komatsu Wheel Loader WA470-7 sn 10001 and up Workshop Service Manual

WHEEL LOADER SEN06006-02 WA470 -7 SERIAL NUMBERS 10001 and up

SHOP MANUAL WHEEL LOADER WA470-7 Model WA470-7 Serial Number 10001 and up 00 Index and foreword 1 00 Index and foreword WA470-7 00-1

00 Index and foreword Index Index (ALL-0310-001-A-00-A) 00 Index and foreword ....................................................................................................................... 00-1 Index ......................................................................................................................................... 00-2 Foreword, safety and general information ................................................................................... 00-18 Important safety notice ....................................................................................................... 00-18 How to read the shop manual .............................................................................................. 00-25 Explanation of terms for maintenance standard .................................................................... 00-27 Handling equipment of fuel system devices .......................................................................... 00-29 Handling of intake system parts ........................................................................................... 00-30 Handling of hydraulic equipment .......................................................................................... 00-31 Method of disconnecting and connecting of push-pull type coupler ......................................... 00-33 Handling of electrical equipment .......................................................................................... 00-36 How to read electric wire code ............................................................................................. 00-44 Precautions when performing operation ............................................................................... 00-47 Practical use of KOMTRAX ................................................................................................. 00-51 Standard tightening torque table .......................................................................................... 00-52 List of abbreviation ............................................................................................................. 00-56 Conversion table ................................................................................................................ 00-61 01 Specification................................................................................................................................. 01-1 Table of contents ........................................................................................................................ 01-2 Specifications ............................................................................................................................. 01-3 Specification drawing ........................................................................................................... 01-3 Specifications ...................................................................................................................... 01-5 Weight table ...................................................................................................................... 01-11 Table of fuel, coolant, and lubricants .................................................................................... 01-13 10 Structure and function ................................................................................................................... 10-1 Table of contents ........................................................................................................................ 10-2 Engine and cooling system .......................................................................................................... 10-4 Engine related parts ............................................................................................................. 10-4 KVGT.................................................................................................................................. 10-6 EGR system piping drawing ................................................................................................ 10-12 EGR system circuit diagram ................................................................................................ 10-14 EGR valve ......................................................................................................................... 10-15 EGR cooler........................................................................................................................ 10-17 KCCV layout drawing ......................................................................................................... 10-19 KCCV ventilator ................................................................................................................. 10-21 KDPF ................................................................................................................................ 10-23 Cooling system .................................................................................................................. 10-27 Cooling fan pump ............................................................................................................... 10-30 Cooling fan motor ............................................................................................................... 10-39 Power train............................................................................................................................... 10-46 Power train system............................................................................................................. 10-46 Drive shaft ......................................................................................................................... 10-49 Power train piping drawing .................................................................................................. 10-50 Transmission control .......................................................................................................... 10-51 Torque converter ................................................................................................................ 10-54 Transmission ..................................................................................................................... 10-59 Transmission control valve.................................................................................................. 10-78 Forward and reverse clutch ECMV and 1st and 2nd clutch ECMV .......................................... 10-81 3rd, 4th clutch ECMV.......................................................................................................... 10-88 Lockup clutch ECMV .......................................................................................................... 10-95 Main relief and torque converter relief valve .......................................................................... 10-99 Axle ................................................................................................................................ 10-101 Differential ....................................................................................................................... 10-103 Final drive ....................................................................................................................... 10-113 Steering system...................................................................................................................... 10-115 Layout of steering parts .................................................................................................... 10-115 Steering column ............................................................................................................... 10-116 00-2 WA470-7

00 Index and foreword Index Steering pump ................................................................................................................. 10-117 Steering valve .................................................................................................................. 10-129 Orbit-roll valve ................................................................................................................. 10-143 Stop valve ....................................................................................................................... 10-149 Emergency steering motor ................................................................................................ 10-150 Emergency steering pump ................................................................................................ 10-151 Brake system ......................................................................................................................... 10-152 Layout of brake parts ........................................................................................................ 10-152 Charge valve ................................................................................................................... 10-154 Brake valve ..................................................................................................................... 10-160 Slack adjuster .................................................................................................................. 10-164 Accumulator (for brake) .................................................................................................... 10-167 Brake .............................................................................................................................. 10-168 Parking brake control ....................................................................................................... 10-171 Parking brake .................................................................................................................. 10-172 Parking brake solenoid valve ............................................................................................ 10-173 Parking brake emergency release valve ............................................................................. 10-176 Undercarriage and frame ......................................................................................................... 10-177 Axle mount and center hinge pin........................................................................................ 10-177 Tire ................................................................................................................................. 10-178 Hydraulic system .................................................................................................................... 10-180 Hydraulic component layout .............................................................................................. 10-180 Work equipment control .................................................................................................... 10-182 Hydraulic tank .................................................................................................................. 10-183 Double type gear pump .................................................................................................... 10-186 Work equipment pump...................................................................................................... 10-187 Control valve ................................................................................................................... 10-208 CLSS .............................................................................................................................. 10-217 Hydraulic circuit diagram and names of valves.................................................................... 10-221 Accumulator charge valve................................................................................................. 10-232 Work equipment lock solenoid valve .................................................................................. 10-236 Accumulator (for PPC circuit) ............................................................................................ 10-237 Accumulator (for ECSS) ................................................................................................... 10-238 Work equipment ..................................................................................................................... 10-239 Work equipment linkage ................................................................................................... 10-239 Bucket ............................................................................................................................ 10-240 Bucket positioner and boom positioner ............................................................................... 10-241 Cab and its attachments .......................................................................................................... 10-242 ROPS cab ....................................................................................................................... 10-242 Electrical system .................................................................................................................... 10-243 Engine control system ...................................................................................................... 10-243 Preheating system ........................................................................................................... 10-245 Engine power mode selector circuit ................................................................................... 10-247 Engine output limit function ............................................................................................... 10-248 Automatic warm-up function .............................................................................................. 10-249 Parking brake control system ............................................................................................ 10-250 System operating lamp function......................................................................................... 10-252 Battery disconnect switch function ..................................................................................... 10-254 Transmission controller system ......................................................................................... 10-256 Work equipment control system......................................................................................... 10-277 Machine monitor system ................................................................................................... 10-293 Rear view monitor system ................................................................................................. 10-317 KOMTRAX system ........................................................................................................... 10-320 System component parts .................................................................................................. 10-323 Sensor ............................................................................................................................ 10-350 20 Standard value tables.................................................................................................................... 20-1 Table of contents ........................................................................................................................ 20-2 Standard service value table ........................................................................................................ 20-3 Standard value table for engine ............................................................................................. 20-3 WA470-7 00-3

Komatsu Wheel Loader WA470-7 sn 10001 and up Workshop Service Manual

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