2025 Komatsu Trucks HD405-8

2025 Komatsu Trucks HD405-8

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  • Year 2025
  • Make Komatsu
  • Model Trucks
2025 Komatsu Trucks HD405-8

2025 Komatsu Trucks HD405-8

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.
Fully hydraulic wet multiple-disc brakes
  • 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.
Automatic retard speed control
  • 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
K-ATOMiCS transmission
  • 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.
Komatsu Traction Control System (KTCS)
  • 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

Product Photography