DOC-20230111-WA0038.

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UNDERCARRIAGE / Front IdlerAssemble Front Idler• Be sure to read “Precautions for Disassembly andAssembly” thoroughly on page W1-1-1 beforestarting any repair work.1. Install bushings (7) (2 used) into idler (8) with apress.IMPORTANT: When installing bearing (2) onto axle(6), take care not to damage O-ring(5).2. Install O-ring (5) to axle (6). Aligning the pin holes,install bearing (2) onto axle (6). Then, tap pin (3)into the bearing.4. Install the other pair of floating seal (4) into idler(8) and bearing (2). Install O-ring (5) to axle (6).Aligning the pin holes, install bearing (2) onto axle(6). Then tap pin (3) into the bearing.24582366W105-03-05-014IMPORTANT: For handling of floating seal (4), referto the section “Precautions forfloating seal handling” on page W1-1-4.3. Install one pair of floating seal (4) into idler (8) andbearing (2). Press axle (6) into idler (8) from theside installed with the floating seal.52W157-03-05-0055. Fill engine oil (SAE #30, API Class CD)140 cm 3via the plug (1) hole of bearing (2). Install plug (1)(2 used) to the bearing.:6 mm: 20 N⋅m (2 kgf⋅m, 14.5 lbf⋅ft)6. Secure yoke (10) to bearings (2) with socket bolts(9) (4 used).: 12 mm: 175 N⋅m (18 kgf⋅m, 130 lbf⋅ft)8 4 26W157-03-05-006W3-5-5
MAINTENANCE STANDARDUNDERCARRIAGE / Front IdlerCDEABW157-03-05-001Unit: mm (in)Standard Allowable Limit RemedyA 43 (1.7) [33.4 (1.3)]B 100 (3.9) −C 390 (15.4) 378 (14.9)D 434 (17.1) −Build-up weldand finishingE 22 (0.9) 28.0 (1.1)Axle and BushingUnit: mm (in)Standard Allowable Limit RemedyAxle Outside Dia. 55 (2.2) [54.2 (2.1)]BushingInside Dia. 55 (2.2) [56.0 (2.2)]Flange Thickness 2 (0.08) [1.2 (0.05)]ReplaceNOTE: Values in [ ] are just for reference.W3-5-6
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INTRODUCTIONTO THE READER• This m
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SAFETYRECOGNIZE SAFETY INFORMATION
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SAFETYWEAR PROTECTIVE CLOTHING• W
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SAFETYUSE HANDHOLDS AND STEPS• Fa
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OPERATE ONLY FROM OPERATOR'SSEAT•
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SAFETYDRIVE MACHINE SAFELY• Befor
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AVOID INJURY FROM BACK-OVER ANDSWIN
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SAFETYAVOID POWER LINES• Serious
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HANDLE FLUIDS SAFELY−AVOID FIRES
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SAFETYPRACTICE SAFE MAINTENANCETo a
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SAFETYPREVENT PARTS FROM FLYING•
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SAFETYAVOID HIGH-PRESSURE FLUIDS•
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SAFETYCheck Emergency Engine Stop S
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REMOVE PAINT BEFORE WELDING ORHEATI
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SAFETYDISPOSE OF WASTE PROPERLY•
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SECTION AND GROUPCONTENTSWORKSHOP M
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SECTION 1GENERAL INFORMATIONGroup 1
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GENERAL / Precautions for Disassemb
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TIGHTENING TORQUE SPECIFICATIONSGEN
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IMPORTANT: The following items are
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GENERAL / TighteningPIPING JOINT1 4
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GENERAL / TighteningScrew-In Connec
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PERIODIC REPLACEMENT OF PARTSGENERA
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GENERAL / PaintingPAINTINGPainting
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MEMO...............................
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SECTION 2UPPERSTRUCTURECONTENTSGrou
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UPPERSTRUCTURE / CabREMOVE AND INST
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UPPERSTRUCTURE / Cab9. Disconnect c
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UPPERSTRUCTURE / CabInstallationCAU
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UPPERSTRUCTURE / Cab7. Install viny
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DIMENSIONS OF THE CAB GLASSUPPERSTR
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UPPERSTRUCTURE / CabMethod for Remo
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UPPERSTRUCTURE / CabMethod for Inst
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UPPERSTRUCTURE / CabSpacer a (44584
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Install upper door glass as follows
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Install upper front glass as follow
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UPPERSTRUCTURE / CounterweightREMOV
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UPPERSTRUCTURE / Counterweight8. In
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UPPERSTRUCTURE / Counterweight5. In
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REMOVE AND INSTALL MAIN FRAMEUPPERS
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UPPERSTRUCTURE / Main FrameCAUTION:
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UPPERSTRUCTURE / Main FrameCAUTION:
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REMOVE AND INSTALL PUMP DEVICEUPPER
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UPPERSTRUCTURE / Pump DeviceInstall
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UPPERSTRUCTURE / Pump DeviceW2-4-5W
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UPPERSTRUCTURE / Pump DeviceDisasse
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UPPERSTRUCTURE / Pump Device1 - Cov
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UPPERSTRUCTURE / Pump DeviceAssembl
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UPPERSTRUCTURE / Pump Device(Blank)
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UPPERSTRUCTURE / Pump DeviceNo Part
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REMOVE AND INSTALLE CONTROLVALVE 1U
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UPPERSTRUCTURE / Control ValveInsta
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UPPERSTRUCTURE / Control ValveDISAS
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UPPERSTRUCTURE / Control Valve95838
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Disassemble Control Valve 1• Be s
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5. Remove plug (26), O-ring (27), s
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UPPERSTRUCTURE / Control Valve13. L
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ASSEMBLE CONTROL VALVE 1UPPERSTRUCT
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UPPERSTRUCTURE / Control ValveSecti
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UPPERSTRUCTURE / Control ValveAssem
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UPPRERSTRUCTURE / Control Valve11.
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UPPERSTRUCTURE / Control Valve17. I
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UPPERSTRUCTURE / Control ValveRemov
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UPPERSTRUCTURE / Control ValveDisas
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UPPERSTRUCTURE / Control Valve1 - S
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UPPERSTRUCTURE / Control ValveAssem
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REMOVE AND INSTALLE SWING DEVICEUPP
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UPPERSTRUCTURE / Swing Device(Blank
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UPPERSTRUCTURE / Swing DeviceDisass
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UPPERSTRUCTURE / Swing DeviceCAUTIO
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UPPERSTRUCTURE / Swing DeviceCAUTIO
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UPPERSTRUCTURE / Swing DeviceAssemb
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UPPERSTRUCTURE / Swing Device9. Adj
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UPPERSTRUCTURE / Swing Device10. Re
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UPPERSTRUCTURE / Swing DeviceIMPORT
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UPPERSTRUCTURE / Swing Device12. Re
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UPPERSTRUCTURE / Swing DeviceAssemb
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UPPERSTRUCTURE / Swing Device18. Ap
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REMOVE AND INSTALL RIGHT PILOTVALVE
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UPPERSTRUCTURE / Pilot ValveIMPORTA
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REMOVE AND INSTALL LEFT PILOTVALVEU
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REMOVE AND INSTALL TRAVEL PILOTVALV
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UPPERSTRUCTURE / Pilot ValveInstall
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REMOVE AND INSTALL BLADE PILOTVALVE
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UPPERSTRUCTURE / Pilot ValveInstall
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Disassemble Right and Left Pilot Va
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Assemble Right and Left Pilot Valve
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UPPERSTRUCTURE / Pilot Valve8. Appl
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UPPERSTRUCTURE / Pilot ValveDisasse
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UPPERSTRUCTURE / Pilot Valve10. Rem
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Assemble Travel Pilot ValveUPPERSTR
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UPPERSTRUCTURE / Pilot Valve7. Plac
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UPPERSTRUCTURE / Pilot Valve14. Ins
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Disassemble Blade Pilot Valve• Be
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UPPERSTRUCTURE / Pilot ValveAssembl
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UPPERSTRUCTURE / Pilot Shut-Off Val
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InstallationUPPERSTRUCTURE / Pilot
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UPPERSTRUCTURE / Pilot Shut-Off Val
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Assemble Pilot Shut-Off ValveUPPERS
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REMOVE AND INSTALL SHOCKLESSVALVEUP
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DISASSEMBLE AND ASSEMBLE SHOCK-LESS
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UPPERSTRUCTURE / Shockless Valvekey
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REMOVE AND INSTALL SOLENOID VALVEUN
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UPPERSTRUCTURE / Solenoid Valve(Bla
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Disassemble Proportional Solenoid V
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Assemble Proportional Solenoid Valv
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UPPERSTRUCTURE / Solenoid ValveDisa
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MEMO...............................
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SECTION 3UNDERCARRIAGECONTENTNSGrou
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REMOVE AND INSTALL SWING BEARINGUND
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UNDERCARRIAGE / Swing Bearing(Blank
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UNDERCARRIAGE / Swing BearingDisass
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UNDERCARRIAGE / Swing BearingAssemb
Page 246 and 247: REMOVE AND INSTALL TRAVEL DEVICEUND
Page 248 and 249: UNDERCARRIAGE / Travel DeviceInstal
Page 250 and 251: UNDERCARRIAGE / Travel DeviceDisass
Page 252 and 253: IMPORTANT: For handling of floating
Page 254 and 255: UNDERCARRIAGE / Travel DeviceAssemb
Page 256 and 257: UNDERCARRIAGE / Travel Device11. In
Page 258 and 259: UNDERCARRIAGE / Travel DeviceDisass
Page 260 and 261: 12. Remove retaining rings (23) and
Page 262 and 263: UNDERCARRIAGE / Travel DeviceAssemb
Page 264 and 265: IMPORTANT: When needle bearing (7)
Page 266 and 267: Disassemble Brake Valve• Be sure
Page 268 and 269: Assemble Brake Valve• Be sure to
Page 270 and 271: REMOVE AND INSTALL CENTER JOINTUNDE
Page 272 and 273: UNDERCARRIAGE / Center JointInstall
Page 274 and 275: UNDERCARRIAGE / Center JointDisasse
Page 276 and 277: UNDERCARRIAGE / Center JointAssembl
Page 278 and 279: MAINTENANCE STANDARDUNDERCARRIAGE /
Page 280 and 281: REMOVE AND INSTALL TRACKADJUSTERBef
Page 282 and 283: Disassemble Track Adjuster• Be su
Page 284 and 285: UNDERCARRIAGE / Track AdjusterCAUTI
Page 288 and 289: UNDERCARRIAGE / Track AdjusterAssem
Page 292 and 293: REMOVE AND INSTALL FRONT IDLERBefor
Page 294 and 295: UNDERCARRIAGE / Front IdlerDisassem
Page 298 and 299: UNDERCARRIAGE / Upper And Lower Rol
Page 310 and 311: REMOVE AND INSTALL TRACKSRemovalUND
Page 312 and 313: UNDERCARRIAGE / TrackCAUTION: Secur
Page 314 and 315: UNDERCARRIAGE / TrackIMPORTANT: Ins
Page 316 and 317: UNDERCARRIAGE / TrackMAINTENANCE ST
Page 318 and 319: UNDERCARRIAGE / TrackPinBAW142-03-0
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Page 322 and 323: SECTION 4FRONT ATTACHMENTGroup 1 Fr
Page 324 and 325: FRONT ATTACHMENT / Front Attachment
Page 332 and 333: STANDARD DIMENSIONS FOR ARMAND BUCK
Page 334 and 335: REMOVE AND INSTALL CYLINDERFRONT AT
Page 336 and 337: FRONT ATTACHMENT / CylinderInstall
Page 338 and 339: FRONT ATTACHMENT / CylinderCAUTION:
Page 340 and 341: FRONT ATTACHMENT / Cylinder4. Remov
Page 342 and 343: 4. Disconnect hoses (6) (2 used) fr
Page 344 and 345: 5. Hoist boom cylinder (4). Start t
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FRONT ATTACHMENT / CylinderInstall
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FRONT ATTACHMENT / CylinderDisassem
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FRONT ATTACHMENT / CylinderAssemble
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FRONT ATTACHMENT / CylinderIMPORTAN
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11. Align the holes on piston rod (
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MEMO...............................
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SECTION 5ENGINE AND ACCESSORYSECTIO
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MEMO...............................
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Hitachi Construction Machinery Co.
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DOC-20230111-WA0038.

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