Komatsu PC490LC-11 Hydraulic Excavator Shop Manual CEBM028303 – PDF Download

Description

Komatsu PC490LC-11 Hydraulic Excavator Shop Manual — CEBM028303

This is the complete Komatsu PC490LC-11 shop manual, publication number CEBM028303, covering hydraulic excavators with serial numbers PC490LC-11 A41001 and up and the 6D125E-7 (SAA6D125E-7) diesel engine. It is the full workshop reference used for servicing, diagnosing, testing, adjusting, disassembling, and reassembling the machine — from the engine and aftertreatment system through to the hydraulic circuits and undercarriage.

File Details

• Manual type: Shop / Workshop Manual
• Brand: Komatsu
• Model: PC490LC-11 Hydraulic Excavator
• Engine: Komatsu SAA6D125E-7 diesel engine (6D125E-7)
• Serial numbers: PC490LC-11 A41001 and up
• Publication number: CEBM028303
• Language: English
• File format: PDF
• Page count: 1000+ pages across all sections

Chapters Covered

The manual is organised into the standard Komatsu shop manual hierarchy. Every section below is included:

• 00 INDEX AND FOREWORD — Abbreviation list, safety notice for operation, precautions to prevent fire, actions if fire occurs, disposal of waste materials, exhaust gas regulations, precautions for DEF/AdBlue, handling hydraulic equipment, disconnection/connection of pipings and connectors, electrical wire code, maintenance standard terms, standard tightening torque table, conversion table.
• 01 SPECIFICATIONS — Specification drawing, working range drawings, machine specifications, weight table, fuel/coolant/lubricants table.
• 10 STRUCTURE AND FUNCTION — Urea SCR system, boot-up system, engine system, auto-deceleration system, automatic warm-up, overheat prevention, automatic idle stop, cooling system (hydraulic fan), control system, machine monitor, KOMTRAX, hydraulic system (CLSS), engine and pump combined control, work equipment system, swing system, travel system, undercarriage and frame, work equipment, cab and attachments.
• 20 STANDARD VALUE TABLE — Standard value table for engine and machine, electrical standard values, machine posture and performance measurement procedures.
• 30 TESTING AND ADJUSTING — Engine speed, boost pressure, exhaust gas colour, valve clearance, compression pressure, blowby pressure, engine oil pressure, EGR/VGT oil pressure, fuel pressure, fuel return rate, air bleeding, SCR related functions, AdBlue/DEF pump pressure, injection amount, line heater relays, denitration efficiency, swing circle bearing clearance, track tension, hydraulic circuit pressures, pump PC/LS control circuits, solenoid valve pressures, PPC valve output, pump swash plate sensor, cooling fan speed, oil leakage tests, hydraulic air bleeding, cab tipping stopper, mirror adjustment, machine monitor setup and service mode.
• 40 TROUBLESHOOTING — General troubleshooting points, troubleshooting points for Urea SCR system, sequence of events, checks before troubleshooting, electrical system preparation, symptoms of failure and troubleshooting numbers, connector list and layout, fuse location table, failure codes table, troubleshooting by failure code (hundreds of codes from 879 series, A series, B series, C series, D series, E-mode, H-mode, S-mode), E-mode electrical system troubleshooting, H-mode hydraulic and mechanical systems troubleshooting, S-mode engine troubleshooting.
• 50 DISASSEMBLY AND ASSEMBLY — Supply pump, injector, fuel doser, cylinder head, EGR valve, EGR cooler, starting motor, alternator belt, radiator, cooling fan and motor, hydraulic oil cooler, aftercooler, engine and main pump, engine front/rear oil seals, engine hood, fuel tank, AdBlue/DEF tank and sensor, KDPF, SCR assembly, KCCV, AdBlue/DEF mixing tube and injector and pump and hoses, air cleaner, air conditioner compressor and condenser, travel motor and final drive, swing motor and machinery, swing circle, track assembly, sprocket, idler, idler cushion, track roller, carrier roller, revolving frame, counterweight, center swivel joint, hydraulic tank, main pump, control valve, work equipment PPC valves, travel PPC valve, work equipment assembly, anti-drop valves, work equipment cylinder, operator’s cab, cab glass, front window, floor frame, air conditioner unit, operator’s seat, seat belt, front wiper, engine controller, pump controller, machine monitor, pump swash plate sensor, mass air flow sensor, KCCV crankcase pressure sensor, SCR temperature sensor, KOMTRAX terminal.
• 60 MAINTENANCE STANDARD — Engine mount, cooling system, cooling fan pump and motor, swing circle, swing machinery, final drive, sprocket, track frame and idler cushion, idler, track roller, carrier roller, track shoe, triple shoe, main pump, swing motor, travel motor, control valve, anti-drop valve for boom and arm, work equipment and swing PPC valve, travel PPC valve, 1st-line attachment PPC valve, solenoid valve, attachment circuit selector valve, center swivel joint, work equipment linkage, boom/arm/bucket cylinders.
• 80 APPENDIX — Air conditioner system: precautions for refrigerant, specifications, refrigeration cycle, component parts, controller, compressor, condenser, receiver drier, sensors, testing and troubleshooting, circuit diagram, connector pin arrangement, air leakage testing, self-diagnosis, vent changeover tests, sunlight sensor, pressure switch, relays, troubleshooting charts, gauge pressure testing, service tool connection, compressor oil handling.
• 90 CIRCUIT DIAGRAMS — Hydraulic circuit diagram (1/2 and 2/2), electrical circuit diagram (1/8 through 8/8), symbols used in both.

What This Manual Gives You

This Komatsu PC490LC-11 shop manual is a complete service reference — not a summarised owner’s guide. It contains the measurement procedures, adjustment values, tightening torques, component specifications, and step-by-step disassembly/assembly instructions that a technician needs to properly service the machine. The troubleshooting chapter alone covers hundreds of failure codes with causes and remedies, plus separate E-mode (electrical), H-mode (hydraulic/mechanical) and S-mode (engine) diagnostic flows. The structure and function chapter explains how each system operates, which is essential for accurate diagnosis rather than parts-swapping.

Whether you are servicing the SAA6D125E-7 engine, repairing the hydraulic pump and control valve, diagnosing an SCR/AdBlue fault, replacing a final drive or swing motor, adjusting track tension, or chasing an electrical problem, the relevant procedure, standard value, and specification are all included in this single document.

Why It Matters

Working on a modern Tier 4 Final excavator without the correct specifications and procedures risks expensive damage — particularly to the common rail fuel system, the hydraulic components, and the aftertreatment system. This manual provides the exact tightening torques, pressure values, electrical pin data, and step-by-step sequences required to perform the job correctly the first time. It also includes the safety precautions necessary when working with high-pressure fuel, hydraulic circuits, hot exhaust components, and AdBlue/DEF.

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Instant Delivery

Your purchase gives you immediate access to the PDF download — no shipping, no waiting. The file can be viewed on any device (computer, tablet, or smartphone) and the relevant pages can be printed for use in the workshop. This is the complete Komatsu PC490LC-11 shop manual CEBM028303 in PDF format.