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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.
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 lowered if oil temperature increases to a set limit.
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): KCTS 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.
High rigidity frame: Cast-steel components are used in critical areas of the main frame where loads and shocks are most concentrated for increased machine durability.
Robust dump body design: Remarkable rigidity and low maintenance cost with a body design made of high-tensile-strength steel. Stability and lower center of gravity through a standard V-shape body design.
Ergonomically designed cab: Operator comfort is key to your operation’s productivity. Designed for operator comfort, an ergonomically designed cab compartment has a convenient control layout.
Convenient access: Machine maintenance is made more convenient with inclined stairs and handrails that provide easy access to the cab and service deck.
Integrated payload meter: Manage the hauling cycle payloads and analyze the production volume and working conditions for specific time periods. Loaded weight is shown on the payload display and external display lamps in real time.
Ground-accessible battery compartment: Facilitate daily checks and battery replacement with a battery compartment located at ground level for convenient access.
Centralized greasing points: Easy accessibility with ground-level greasing points centralized at three locations.
|Cab||Dimensions comply with ISO 3471 and SAE J1040-1988c ROPS (Roll-Over Protective Structure) standards|
|Frame Type||Box-sectioned structure|
|Material||227,520 psi high tensile strength steel|
|Material Thickness||Bottom: 0.75”
|Structure||Material: V-shape body|
|Body Capacity||26.2 yd³ (struck)
35.7 yd³ (heaped)
|Brake Surface||Front: 150 in²
Rear: 7,881 in²
|Target Area||18’6” x 11’1”|
|Transmission||Full-automatic, planetary type
Forward: Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears
Reverse: Torque converter drive
|Engine Type||Water-cooled, 4-cycle|
|Horsepower||Gross: 518 HP
Net: 514 HP
|Bore x Stroke||5.5” x 6.5”|
|Torque||1,600 ft. lbs.|
|Air Cleaner||Dry type with double elements and precleaner, plus dust evacuator valve|
|Fuel Tank Capacity||120.5 US gallons|
|Rated RPM||2000 rpm|
|Lubrication System||Method: Gear pump, force-lubrication
Filter: Full-flow type
|Number of Cylinders||6|
|Aspiration||Variable geometry, turbo-charged, air-to-air after-cooled, cooled Exhaust Gas Recirculation (EGR)|
|Fuel System||Direct injection|
|Piston Displacement||930 in³|
|Fan Drive Type||Hydraulic|
|Final Drive||Planetary gear|
|Speed Range||Seven speeds forward and one reverse|
|Torque Converter||Three-elements, one-stage, two-phase|
|Brakes||Brakes meet ISO 3450 and SAE 1473 standards
Front Service Brake: Dry type, single disc type full hydraulic
Rear Service Brake: Wet type, multiple disc type, full hydraulic
Parking Brake: Dry type, single disc type, spring operated, hydraulic releasing type
Retarder: Oil-cooled, multiple-disc type
Secondary Brake: Manual pedal operation
When hydraulic pressure drops below the rated level, parking brake is automatically actuated
|Suspension||Independent, hydro-pneumatic suspension cylinder with fixed throttle to dampen vibration
Effective cylinder stroke (front suspension): 9.8”
|Steering||Fully hydraulic power steering with two double-acting cylinders
Supplementary: Automatic/manual controlled (meets ISO 5010, SAE J1511 and SAE J53)
|Heating System||Exhaust heating|
|Payload Capacity||44.1 tons|
|Hoist||Hoist cylinder: Twin, two-stage telescopic type
Hoist time: 10 sec
|Relief Pressure Setting||2,990 psi|
|Hydraulic System Capacity||31.7 US gallons|
|Oscillation||Rear Axle Oil Stopper: 6.8°
Rear Axle Mechanical Stopper: 8.1°
|Shift Control||Electronic shift control with automatic clutch modulation in all gears|
|Lockup Clutch||Wet, single-disc clutch|
POWER TRAIN AND CONTROLS:
GUARD AND COVER GROUP:
MONITORING SYSTEM, ELECTRONIC DISPLAY ITEMS:
TIRES (21.00 R33):
*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.