2025 Komatsu Trucks HD405-8
- Year 2025
- Make Komatsu
- Model Trucks
2025 Komatsu Trucks HD405-8
Maneuverability even in tight spaces
Known for its maneuverability and tight turning radius, the HD405-8 helps you deliver high productivity and offers impressive durability. A fully automatic K-ATOMiCS transmission with lock-up torque converter, a hydro-pneumatic suspension system and oil-cooled multiple-disc brakes makes this the right choice for a variety of jobs.
Features may include:
MacPherson-strut-type suspension- A comfortable ride, even on uneven roads. The MacPherson-strut-type independent front suspension allows the front wheels to follow uneven road surfaces smoothly.
- Give your operator greater confidence at higher downhill speeds with wet multiple-disc brakes. Continuously oil-cooled, multiple-disc brakes function as a highly responsive retarder for added reliability and stable brake performance.
- Let your operator concentrate more on steering by simply setting the downhill travel speed at increments of 0.6 mph to match the optimum speed for slope. Travel speed is automatically lowere
- Komatsu Advanced Transmission with Optimum Modulation Control System (K-ATOMiCS) helps avoid unnecessary fuel consumption, reduce material spillage and provide a smoother ride for operators by automatically selecting a gear position depending on grade, speed and acceleration.
- KTCS is engineered for optimal traction in soft or wet road conditions with a system that monitors for wheel slippage at the rear axle. If slippage is detected, brakes are applied independently and automatically to each wheel set.
Engine
Engine Manufacturer
Komatsu SAA6D140E-7
Engine Power
SAE J1995: 518 HP | ISO 9249 /SAE J1349: 514 HP
Engine Type
4-cycle
Engine Torque
Maximum: 1600 Ibs.-ft.
Cooling
Water-cooled
Aspiration
Variable geometry, turbo-charged, air-to-air after-cooled, cooled Exhaust Gas Recirculation (EGR)
Cylinder Liners
6
Bore
5.5 in
Stroke
6.5 in
Displacement
Piston: 930 in³
Air Cleaner
Dry type with double elements and precleaner, plus dust indicator
Lubrication
Gear pump, force-lubrication
Emissions
EPA Tier 4 Final
Fuel System
Fuel System
Direct injection
Drivetrain
Transmission
Full-automatic, planetary type | Speed range: Seven speeds forward and one reverse
Clutch
Wet, single-disk clutch
Governor
Electronically controlled
Steering
Fully hydraulic power steering with two double-acting cylinder | Supplementary steering: Automatic/manual control (meets ISO 5010, SAE J1511 and SAE J53)
Brakes
Front/Rear Brakes
Dry type, single disc type full hydraulic / Wet type, multiple disc type, full hydraulic
Parking Brake
Dry type, single disc type, spring operated, hydraulic releasing type
Brake System Type
Secondary: Manual pedal operation When hydraulic pressure drops below the rated level, parking brake is automatically actuated
Wheels & Tires
Tires, Front Specification
21.00 R33
Tires, Rear Specification
21.00 R33
Operational
Operating Conditions
Hoist time: 10 s
Operating Speed
2,000 rpm | Maximum travel speed: 41.0 mph
Hydraulics
Maximum Pressure
2,990 psi
Dimensions
Dimensions
Material thickness Bottom: 0.75 in | Material thickness Front: 0.55 in | Material thickness Sides: 0.35 in | Front break: 150 in2 | Rear break: 7,881 in2 | Maximum steering angle: 38° | Effective cylinder stroke (front suspension): 9.8 in | Oil stopper: 6.8° | Mechanical stopper: 8.1° | Dumping angle: 48°
Turning Radius
25 ft. 11 in
Length
18 ft. 6 in
Width
11 ft. 1 in
Height
at full dump: 26 ft. 7 in
Capacities
Struck Level
26.2 yd3
Heaped Capacity
35.7 yd3
Features
Suspension (total): 11.7 US gal | Final drive (left and right): 7.9 US gal | Differential: 11.9 US gal | Torque converter, transmission and retarder cooling: 29.6 US gal | Payload, maximum: 44.1 US tons | Material (high-tensile-strength steel): 227,520 psi
Fuel Capacity
120.5 US gal
Tank Type
DEF tank: 9.2 US gal
Oil capacity
Engine: 13.2 US gal
Hydraulic Capacity
system: 31.7 US gal
Weights
Weight
Empty: 82,310 lbs.| Standard tire: 170,671 lbs. | Empty: Front axle: 54.2% | Rear axle: 45.8% | Loaded: Front axle: 32.9% | Rear axle: 67.1%
Features
Features
Differential: 3.125 | Planetary: 5.211