Description:
Serial Number Information
The serial number plate for Komatsu D155AX models is typically located on the left frame rail below the operator’s cab or near the engine compartment. Use these serial number ranges to identify your specific model generation:
| Model Variant |
Starting Serial Number |
| D155AX-3 |
60001 |
| D155AX-5 |
76001 |
| D155AX-6 |
80001 |
| D155AX-7 |
90001 |
| D155AX-8 |
100001 |
Serial numbers are crucial for ordering the correct engine, blade, and undercarriage parts.
Key Specifications
| Feature |
Specification |
| Engine Model |
Komatsu SAA6D140E-5, 6-cylinder turbo diesel |
| Emissions Tier |
Tier 4 Final compliant |
| Net Power |
354 HP (264 kW) @ 1,900 RPM |
| Operating Weight |
89,300 lbs (40,500 kg) |
| Transmission Type |
Planetary gear, 3F / 3R |
Blade & Traction
| Blade Type |
Capacity |
| Semi-U Blade |
12.3 cubic yards |
| Full-U Blade |
16.6 cubic yards |
| Feature |
Specification |
| Track Width |
27.6 in (700 mm) |
| Ground Pressure |
12.7 psi |
Travel Speeds
| Direction |
Speed |
| Forward |
6.8 mph (11 km/h) |
| Reverse |
8.6 mph (13.8 km/h) |
Key Features
High-Horsepower Efficiency
With 354 HP from the Komatsu SAA6D140E-5 engine, the D155 is built for large-scale dozing, pushing massive volumes of material with less effort and reduced emissions.
Versatile Blade Options
Select from a 12.3 yd³ Semi-U blade for general grading or a 16.6 yd³ Full-U blade for high-volume bulk dozing operations.
Heavy-Duty Undercarriage
The 27.6-inch wide tracks and low 12.7 psi ground pressure enhance traction and floatation in loose or wet soils.
Durable Powertrain
The planetary gear transmission with 3 forward and 3 reverse speeds ensures smooth shifts and powerful torque for uphill or resistance-intensive work.
Common Replacement Parts
Keep your Komatsu D155 dozer running strong with essential parts available at Broken Tractor:
Engine Components
Injectors, turbochargers, water pumps, oil coolers, thermostats
Transmission & Final Drive
Planetary gear sets, clutch discs, bearings, drive shafts, torque converters
Blade Assemblies
Cutting edges, push arms, tilt cylinders, U-blade tips, trunnion bearings
Undercarriage Parts
Track chains, rollers, sprockets, idlers, tension springs
Cab & Electrical
Monitors, joystick controls, seat kits, wiring harnesses, ignition switches
Maintenance Schedule
| Task |
Recommended Interval |
| Engine Oil & Filter |
Every 250 hours |
| Fuel Filter & Water Separator |
Every 250 hours |
| Hydraulic Fluid & Filter |
Every 500 hours |
| Transmission Service |
Every 500–1,000 hours |
| Undercarriage Inspection |
Weekly or after rocky terrain use |
| Cooling System Flush |
Annually or every 1,000 hour |