Target Audience:
Owners, operators, and technicians responsible for maintenance and repair of the Komatsu WA250-5 wheel loader.
Vehicle Class:
Medium-sized wheel loader used in construction, quarry, and material handling applications.
Advantage:
Komatsu's reputation for durability and reliability, combined with a balanced design for productivity and operator comfort.
Hydraulics:
Advanced hydraulic system for efficient loading and digging.
Operator Environment:
Designed for reduced fatigue and improved visibility.
Serviceability:
Ground-level service points and easy access to major components.
Engine:
Operation, maintenance, troubleshooting
Transmission:
Operation, shift patterns, maintenance
Hydraulic System:
Pumps, valves, cylinders, maintenance
Electrical System:
Battery, starter, alternator, wiring diagrams
Undercarriage:
Track and wheel components
Brakes:
Service and parking brake systems
Steering:
Steering system operation and maintenance
Cab and Controls:
Operator controls, instruments
Air Conditioning:
Maintenance and troubleshooting
Operation:
Starting, driving, and shutdown procedures
Maintenance:
Preventive maintenance schedules, lubrication, adjustments
Service:
Unit replacement and repair guidance
Troubleshooting:
Common issues and resolutions
Depth:
Detailed enough for owner-performed maintenance and routine servicing.
Illustrations:
Diagrams and exploded views for component identification.
Specifications:
Fluid capacities, torque values, and clearances
Parts:
Part numbers for replacement items are not included; refer to separate parts manual.
Model:
Komatsu SAA6D107E-1 (on some variants)
Type:
Diesel, 6-cylinder, 4-cycle, water-cooled, turbocharged and air-to-air aftercooled.
Net Power:
Approximately 191 hp (143 kW) at rated speed (varies by variant)
Injection:
Direct injection
Type:
Planetary gear, full powershift with 4 forward and 3 reverse speeds.
None:
N/A - No optional transmission offered for this model.
Control:
Single lever or pedal controlled
Lockup:
Torque converter with lockup for efficiency.
Wheelbase:
Approximately 3,155 mm (124.2 in)
Overall Length (with bucket):
Approximately 7,490 mm (295 in)
Operating Weight:
Approximately 16,400 kg (36,150 lb)
Ratings:
N/A – Not applicable for industrial equipment.
Braking:
Sealed multi-disc wet service brakes with hydraulic power assist.
ROPS:
Roll-over protective structure cab (if equipped)
Visibility:
Optimized visibility to bucket and surroundings.
Seat Belt:
Seat belt provided
Backup Alarm:
Optional or standard depending on configuration.
Engine Oil:
Every 250 hours or as indicated in manual.
Hydraulic Oil:
Every 1,000 hours or annually.
Transmission Oil:
Every 1,000 hours or as indicated.
Grease Points:
Daily or at recommended intervals.
Engine Oil:
API CI-4 (or higher) 15W-40 grade.
Hydraulic Oil:
Use Komatsu HYDO or equivalent ISO VG 46.
Coolant:
50/50 mix of water and ethylene glycol-based antifreeze.
Known Issues / Wear Items
Common Wear:
Bucket teeth, cutting edges, and tires.
Potential Issue:
Some units may experience hydraulic pump wear if fluids are not changed regularly.
Manufacturer:
Komatsu Ltd., a leading global manufacturer of construction and mining equipment.
Model Series:
WA250-5 is part of Komatsu's 'Dash 5' series of wheel loaders, succeeding the WA250-3.
Successor:
Replaced by the WA250-6.
Country:
Manufactured in Japan (primarily) and possibly at other Komatsu plants globally.
