Target Audience:
Komatsu service technicians, fleet maintenance crews and experienced DIY owners
Manual Purpose:
Contains the service, repair and overhaul procedures required to maintain the 125E-5 diesel engine
Key Advantage:
Factory-derived procedures, specifications and torque values in one searchable file
Key Feature:
Printable pages for use in the workshop
Key Feature:
Covers the engine as fitted to the applicable Komatsu machine
Key Feature:
Digital delivery, no shipping wait
Engine Mechanical:
Cylinder head, cylinder block, pistons, rings, connecting rods, crankshaft, bearings, camshaft and valve train
Lubrication System:
Oil pump, oil cooler, filters, galleries and pressure checks
Cooling System:
Water pump, thermostat, radiator, fan drive and coolant circuit
Fuel System:
Fuel supply pump, injection pump, injectors, filters and lines
Air Intake System:
Air cleaner, intake manifold, turbocharger and associated piping where equipped
Exhaust System:
Exhaust manifold and related components
Electrical System:
Starting, charging and engine sensors for the engine assembly
Emission Control:
Engine emission-related components where documented
Diagnostics:
Troubleshooting charts and fault diagnosis procedures
Disassembly:
Step-by-step engine removal and teardown sequences
Inspection:
Component measurement and wear limit checks
Repair and Overhaul:
Rebuild procedures with specified clearances
Reassembly:
Installation and assembly procedures in order
Adjustment:
Valve clearance and other service adjustments
Testing:
Engine running and performance checks
Wiring:
Electrical schematics and connectors for engine circuits
Technical Depth and Parts
Technical Depth:
Factory-level specifications, clearances, torque values and wear limits
Parts Information:
Component identification and assembly reference
Special Tools:
Service tool references where required
Resource Type:
Complete engine service reference
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Komatsu diesel engine
Model Designation:
125E-5
Fuel System:
Diesel injection system, as described in the manual
Displacement:
N/A - confirm by serial number and manual text
Power Output:
N/A - confirm by serial number and manual text
Lubrication:
Pressure-fed via engine oil pump
Oil Specification:
Refer to manual for the applicable grade
Service Intervals:
Refer to the maintenance schedule in the manual
Fluids:
Engine oil and coolant specifications as stated in the manual
Filters:
Oil, fuel and air filter service procedures covered
Known Wear Items:
Belts, hoses, seals, gaskets and filters
Routine Checks:
Inspection and adjustment intervals detailed in the manual
