Komatsu WA270-7 Loader Service Manual (SN A27001 & Up)

Covers: Komatsu WA270-7 Loader

• USA, Serial No. A27001 and up

Pages: 2,048
Format: PDF
File size: 56mb
Compatibility: Windows/Mac/Tablet
Notes: Instant digital download only – no printed copy or CD-ROM media.

The Komatsu WA270-7 Loader Service Manual (SN A27001 & Up) PDF covers service, repair and troubleshooting procedures for the wheel loader. Topics in this 2,000+ page manual include specifications, removal and installation, disassembly and assembly, testing and adjusting and troubleshooting. Illustrations, diagrams and schematics are also included where applicable. Instant PDF download for your smartphone, tablet or computer.

Topics:

Specifications

• Drawings
• Weight table
• Table of fuel, coolant, and lubricants

Structure and function

• Engine and cooling system
• Engine related parts
• KVGT
• EGR
• KCCV
• KDPF
• Cooling system
• Power train
• Damper
• Hydrostatic
• Transfer
• Clutch solenoid valve
• Drive shaft
• Axle
• Differential
• Torque proportional differential
• Limited slip differential
• Final drive
• Steering system
• Brake system
• Undercarriage and frame
• Hydraulic system
• Work equipment
• ROPS cab
• Electrical system

Standard value tables

Testing and adjusting

Work equipment

Troubleshooting

• Failure code [2F00MA] Failure of Parking Brake Circuit
• Failure code [2F00MB] Malfunction of Parking Brake
• Failure code [2G42ZG] Accumulator Oil Pressure Low (Front)
• Failure code [2G43ZG] Accumulator Oil Pressure Low (Rear)
• Failure code [6091NX] HST Oil Filter Clogging
• Failure code [7RHYKA] Disconnection of Fan Variable Control Sol
• Failure code [7RHYKB] Ground Fault of Fan Variable Control Sol
• Failure code [7RHYKY] Hot Short of Fan Variable Control Sol
• Failure code [879AKA] A/C Inner Sensor Open Circuit
• Failure code [879AKB] A/C Inner Sensor Short Circuit
• Failure code [879BKA] A/C Outer Sensor Open Circuit
• Failure code [879BKB] A/C Outer Sensor Short Circuit
• Failure code [879CKA] Ventilating Sensor Open Circuit
• Failure code [879CKB] Ventilating Sensor Short Circuit
• Failure code [879DKZ] Sunlight Sensor Open or Short Circuit
• Failure code [879EMC] Ventilation Damper Abnormality
• Failure code [879FMC] Air Mix Damper Abnormality
• Failure code [989L00] Engine Controller Lock Caution 1
• Failure code [989M00] Engine Controller Lock Caution 2
• Failure code [989N00] Engine Controller Lock Caution 3
• Failure code [A1U0N3] HC Desorb Request 1
• Failure code [A1U0N4] HC Desorb Request 2
• Failure code [B@BAZG] Eng Oil Press Low
• Failure code [B@BCNS] Eng Water Overheat
• Failure code [B@BCZK] Eng Water Level Low
• Failure code [B@CRNS] HST Oil Temp
• Failure code [CA115] Eng Ne and Bkup Speed Sens Error
• Failure code [CA122] Chg Air Press Sensor High Error
• Failure code [CA123] Chg Air Press Sensor Low Error
• Failure code [CA131] Throttle Sensor High Error
• Failure code [CA132] Throttle Sensor Low Error
• Failure code [CA144] Coolant Temp Sens High Error
• Failure code [CA145] Coolant Temp Sens Low Error
• Failure code [CA153] Chg Air Temp Sensor High Error
• Failure code [CA154] Chg Air Temp Sensor Low Error
• Failure code [CA187] Sensor 2 Supply Volt Low Error
• Failure code [CA221] Ambient Press Sensor High Error
• Failure code [CA222] Ambient Press Sensor Low Error
• Failure code [CA227] Sensor 2 Supply Volt High Error
• Failure code [CA234] Eng Overspeed
• Failure code [CA238] Ne Speed Sensor Supply Volt Error
• Failure code [CA239] Ne Speed Sens Supply Volt High Error
• Failure code [CA271] IMV/PCV1 Short Error
• Failure code [CA272] IMV/PCV1 Open Error
• Failure code [CA295] Ambient Press Sens In Range Error
• Failure code [CA322] Inj #1(L#1) Open/Short Error
• Failure code [CA323] Inj #5(L#5) Open/Short Error
• Failure code [CA324] Inj #3(L#3) Open/Short Error
• Failure code [CA325] Inj #6(L#6) Open/Short Error
• Failure code [CA331] Inj #2(L#2) Open/Short Error
• Failure code [CA332] Inj #4(L#4) Open/Short Error
• Failure code [CA343] ECM Critical Internal Failure
• Failure code [CA351] Injectors Drive Circuit Error
• Failure code [CA352] Sensor 1 Supply Volt Low Error
• Failure code [CA356] Mass Air Flow Sensor High Error
• Failure code [CA357] Mass Air Flow Sensor Low Error
• Failure code [CA386] Sensor 1 Supply Volt High Error
• Failure code [CA428] Water in Fuel Sensor High Error
• Failure code [CA429] Water in Fuel Sensor Low Error
• Failure code [CA431] Idle Validation Sw Error
• Failure code [CA432] Idle Validation Process Error
• Failure code [CA435] Eng Oil Press Sw Error
• Failure code [CA441] Battery Voltage Low Error
• Failure code [CA442] Battery Voltage High Error
• Failure code [CA449] Rail Press Very High Error
• Failure code [CA451] Rail Press Sensor High Error
• Failure code [CA452] Rail Press Sensor Low Error
• Failure code [CA488] Chg Air Temp High Torque Derate
• Failure code [CA515] Rail Press Sens Sup Volt High Error
• Failure code [CA516] Rail Press Sens Sup Volt Low Error
• Failure code [CA553] Rail Press High Error
• Failure code [CA555] Crankcase Press High Error 1
• Failure code [CA556] Crankcase Press High Error 2
• Failure code [CA559] Rail Press Low Error
• Failure code [CA595] Turbo Speed High Error 2
• Failure code [CA687] Turbo Speed Low Error
• Failure code [CA689] Eng Ne Speed Sensor Error
• Failure code [CA691] Intake Air Temp Sens High Error
• Failure code [CA692] Intake Air Temp Sens Low Error
• Failure code [CA697] ECM Internal Temp Sensor High Error
• Failure code [CA698] ECM Int Temp Sensor Low Error
• Failure code [CA731] Eng Bkup Speed Sens Phase Error
• Failure code [CA778] Eng Bkup Speed Sensor Error
• Failure code [CA1117] Persistent Data Lost Error
• Troubleshooting of electrical system (E-mode)

Maintenance Standard

Air Conditioning System

Diagrams and drawings

• Hydraulic circuit diagram
• Symbols in hydraulic circuit diagram
• Hydraulic circuit diagram
• Electric circuit diagram
• Symbols in electric circuit diagram
• Electrical circuit diagram of machine body
• Electrical circuit diagram of floor

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