Description
Komatsu 107E-2 Workshop Manual providing detailed technical information for the servicing, maintenance, inspection, fault diagnosis and repair of Komatsu 107E-2 Series diesel engines. This comprehensive 425-page workshop publication is a valuable reference for professional technicians, machinery engineers, engine rebuilders and experienced equipment owners.
The manual provides structured workshop procedures for understanding engine operation, investigating faults, dismantling components, inspecting individual parts and completing repairs correctly. It is suitable for Komatsu 107E-2 engines installed in construction machinery, agricultural equipment, industrial machines and other Komatsu-powered applications.
Engine Series Covered
• Komatsu 107E-2 Series diesel engines
Individual engine versions may vary according to the machinery application, production date and intended market. Always check the complete engine model, identification plate and serial information fitted to your equipment before beginning servicing or repair work.
Engine Construction and Operation
The Komatsu 107E-2 Workshop Manual explains the construction, arrangement and operating principles of the main engine systems. Understanding how these systems work together helps technicians approach maintenance, fault diagnosis and repair work methodically.
Coverage relates to the main engine assembly, cylinder block, cylinder head, pistons, piston rings, connecting rods, crankshaft, bearings, valve-operating components and associated internal parts. Technical illustrations and workshop instructions assist with component identification and correct assembly.
Routine Maintenance and Servicing
Regular servicing is essential for dependable starting, efficient performance and a long engine operating life. The manual contains useful guidance for scheduled maintenance, general inspections and routine workshop servicing.
Maintenance information may include lubrication checks, cooling-system inspection, fuel-system servicing, filter maintenance and engine adjustments. Following the appropriate procedures can help identify wear, leakage and incorrect settings before they result in serious component damage.
Fuel and Injection System
The diesel fuel system must deliver clean fuel in the correct quantity and at the proper time. This workshop manual provides technical guidance for inspecting, testing, servicing and adjusting fuel-system components fitted to Komatsu 107E-2 engines.
The fuel-system information can assist when investigating difficult starting, reduced engine power, uneven running, excessive fuel consumption or abnormal exhaust smoke. Injection equipment should be handled carefully and serviced according to the correct procedures and specifications.
Air Intake and Exhaust Systems
Correct airflow is necessary for efficient combustion and dependable engine performance. The manual contains useful information for inspecting the air-intake and exhaust systems.
This guidance can assist with identifying intake restrictions, exhaust restrictions, leakage and component faults that may contribute to loss of power or abnormal smoke. Where fitted, forced-induction components should be inspected and serviced using the appropriate workshop procedures.
Cooling System
The cooling system controls engine temperature and protects components against overheating. The manual provides technical information for inspecting, testing and servicing cooling-system components.
Depending on the engine version, coverage may include the water pump, thermostat, coolant passages and associated parts. These procedures can help diagnose overheating, coolant loss, slow engine warm-up and unusual changes in operating temperature.
Lubrication System
Correct lubrication protects bearings, cylinder surfaces and other moving components against friction and premature wear. The manual includes information relating to the oil pump, filters, lubrication passages and associated parts.
This technical guidance can assist when investigating low lubricating-oil pressure, excessive oil consumption, external leakage and signs of inadequate lubrication. Using the correct lubricant and following the recommended servicing procedures are important for reliable engine operation.
Engine Dismantling
The Komatsu 107E-2 Workshop Manual provides structured procedures for removing and dismantling the principal engine components. Following the correct order reduces the risk of damaging reusable parts and helps keep components organised.
The instructions support individual component repairs and complete engine overhauls. Parts can be removed, cleaned and prepared for detailed inspection according to the workshop procedures.
Component Inspection and Measurement
Accurate inspection is essential during any major engine repair. Components should be examined for cracking, distortion, scoring, excessive clearance and general wear before being approved for continued use.
The manual may provide dimensions and service limits for cylinder bores, pistons, piston rings, crankshaft journals, bearings, valves and valve guides. These measurements help determine whether components remain serviceable, require specialist machining or must be replaced.
Engine Reassembly and Adjustment
Correct reassembly is critical to engine reliability following a repair or overhaul. The manual provides guidance for installing inspected or replacement components in the correct sequence.
Where applicable, the publication includes tightening information, adjustment procedures, assembly requirements and final checks. Following these instructions helps prevent incorrect clearances, loose fasteners and avoidable engine damage.
Engine Fault Diagnosis
The manual provides useful technical information for systematically investigating common diesel-engine problems, including:
• Engine fails to start
• Difficult starting when hot or cold
• Reduced engine power
• Poor performance under load
• Uneven or unstable operation
• Excessive exhaust smoke
• Engine overheating
• Abnormal mechanical noise
• Low engine-oil pressure
• Excessive lubricant consumption
• Fuel, oil or coolant leakage
• Unusual engine vibration
Using the correct workshop information can reduce diagnosis time and help avoid replacing serviceable components unnecessarily.
Technical Data and Specifications
Accurate technical data is essential when completing engine adjustments, repairs and full overhauls. Depending on the engine version and procedure, the manual may provide component dimensions, operating clearances, inspection limits, adjustment figures and tightening information.
Always use the specifications provided for the exact Komatsu 107E-2 engine being repaired. Technical figures from another engine version should not be used unless the manual confirms that they are identical.
Who This Manual Is For
This publication is suitable for:
• Professional diesel-engine technicians
• Construction machinery engineers
• Agricultural equipment engineers
• Independent repair workshops
• Fleet maintenance departments
• Engine rebuilding specialists
• Experienced machinery owners
• Restorers of Komatsu-powered equipment
Digital PDF Workshop Manual
This is a digital PDF workshop manual containing 425 pages. It can be viewed on a computer, laptop, tablet or compatible mobile device. Required pages may also be printed for convenient use beside the engine.
The manual provides a permanent technical resource for maintaining and repairing Komatsu 107E-2 Series engines. It is particularly useful where an original printed workshop manual has been lost, damaged or is no longer available.
Please confirm that your engine belongs to the Komatsu 107E-2 Series and compare its complete identification information before purchasing.
This manual is supplied electronically. Download instructions are provided following purchase, and the complete workshop manual is delivered by secure electronic transfer.
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