Komatsu 125E-6 Series Engine Service Manual
335 pages · Publication SEN05624-02
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- Models
- 125E-6 Series
- Manual type
- Service Manual
- Pages
- 335
- Publication
- SEN05624-02
- Condition
- Brand new

What's inside
From the manual's own table of contents: 15 sections, 123 entries. See sample pages (PDF, 468 KB)
Foreword, safety and general information13 topics
- Important safety notice
- How to read the shop manual
- Explanation of terms for maintenance standard
- Handling equipment of fuel system devices
- Handling of intake system parts
- Handling of hydraulic equipment
- Method of disconnecting and connecting of push-pull type coupler
- Handling of electrical equipment
- How to read electric wire code
- Precautions when performing operation
- Standard tightening torque table
- List of abbreviation
- Conversion table
Specifications6 topics
- Exhaust gas regulation
- Applicable machines
- Specifications
- General view
- Weight table
- Engine performance curve
Components layout1 topic
- Components layout drawing
Intake and exhaust system parts13 topics
- Intake and exhaust system layout drawing
- Intake and exhaust system circuit diagram
- Air cleaner
- KVGT
- Aftercooler
- EGR system piping drawing
- EGR system circuit diagram
- EGR valve
- EGR cooler
- Mixing connector
- KCCV layout drawing
- KCCV ventilator
- KDPF
Engine main body parts7 topics
- Cylinder head
- Cylinder block
- Main moving parts
- Vibration damper
- Timing gear
- Valve system
- Flywheel and flywheel housing
Lubrication system30 topics
- Lubrication system parts layout drawing
- Lubrication system diagram
- Oil pump
- Boost oil pump
- Oil filter
- Oil cooler
- Oil cooler thermo-valve
- Oil pan
- Fuel system
- Fuel system parts layout drawing
- Fuel system circuit diagram
- Outline of CRI system
- Fuel dozing
- Fuel cooler
- Pre-filter
- Main filter
- Cooling system
- Cooling system parts layout drawing
- Cooling system circuit diagram
- Water pump
- Thermostat
- Electrical equipment
- Alternator
- Alternator mounting
- Starting motor
- Fuel feed pump
- Fuel feed pump switch
- Engine wiring harness
- Engine controller
- Sensor
Standard value table3 topics
- Standard service value table
- Standard value table for engine
- Running-in standard and performance test standard
Disassembly and assembly11 topics
- General information on disassembly and assembly
- How to read this manual
- Coating materials list
- Special tool list
- Sketch of special tool
- Disassembly and assembly
- General disassembly of engine
- General assembly of engine
- Removal and installation procedure of supply pump as single component
- Engine front oil seal replacement procedure
- Engine rear oil seal replacement procedure
Maintenance standard14 topics
- Intake and exhaust system parts
- KVGT
- Engine main body parts
- Cylinder head
- Cylinder block
- Cylinder liner
- Crankshaft
- Cam follower and push rod
- Piston
- Connecting rod
- Vibration damper
- Timing gear
- Camshaft
- Valve and valve guide
SERIES5 topics
- Rocker arm
- Crosshead and guide
- Flywheel
- Main relief valve
- Safety valve
Cooling system5 topics
- Oil cooler
- Water pump
- Thermostat
- tools and parts in their correct places. Always
- only in the areas provided for smoking. Never
Inside this manual
Real pages from this service manual (335 pages). Open the sample pages (PDF, 468 KB)
- Specifications, page 76: 01 Specification
- Diagram, page 141: Fuel system circuit diagram
- Troubleshooting, page 306: 60 Maintenance standard
This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 335 pages
Quantity one is the manual described above.
Fast free USA shipping
Ships in 1 business day.
60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).