KOMATSU HD785-8
-
- Share
Komatsu
HD785-8
New
Power on grade. Exceptional brake-retarding performance.
With a rated payload of 101.6 U.S. tons, the HD785-8 is ready to produce in your mining, quarry, and aggregate applications. The Komatsu SAA12V140E-7 engine provides 1,140 net horsepower for excellent speed-on-grade. Oil-cooled, multiple-disc brakes on the front and rear wheels offer excellent brake-retarding capability when descending grades. 101.6 U.S. ton-rated payload / 78.5 yd³ V-shape dump body 33'2" turning radius due to the MacPherson-strut-type independent suspension Wet disc brakes on all four wheels deliver 1,770 HP of retarder-absorption capacity
Hydraulic system
| Hoist cylinder type: | Twin, 2-stage telescopic type |
| Hoist time: | 11.5 |
| Relief pressure (psi): | 2990 |
Body
| Material thickness | |
| Bottom (in): | 0.75 |
| Sides (in): | 0.35 |
| Front (in): | 0.47 |
| Capacity | |
| Heaped 2:1 SAE Capacity (yd^3): | 78.5 |
| Struck capacity (2 : 1) unlined (standard) (yd^3): | 52.3 |
Suspension system
| Front suspension (ft X in): | 1 ft. 0.6 in |
| Rear suspension (in): | 5 |
| Rear axle oscillation oil stopper (degree): | 5.3 |
| Rear axle oscillation mechanical stopper (degree): | 6 |
| McPherson strut type: | Front suspension and four-link type rear axle suspension with independent, hydropneumatic cylinders. |
Weight distribution
| Nominal payload (short tons): | 101.6 (standard unlined body) |
Engine
| Engine model: | Komatsu SAA12V140E-7 (EPA Tier 4 Final emissions certified) |
| Piston displacement (in3): | 1860 |
| Engine type: | Water-cooled, 4-cycle |
| Aspiration: | Turbo-charged, after-cooled, cooled EGR |
| Number of cylinders: | 12 |
| Bore (in): | 5.51 |
| Stroke (in): | 6.5 |
| Lubrication system | |
| Method: | Gear pump, force-lubrication |
| Filter: | Full-flow type |
| Air cleaner: | Dry type with double elements, precleaner and evacuator valve |
| Horsepower | |
| SAEJ1995 - Gross (HP): | 1200 @ 1,900 rpm |
| Fan drive type: | Mechanical |
| Fuel system: | Direct injection |
| Governor: | Electronically controlled |
| ISO 9249 / SAE J1349 - Net (HP): | 1140 @ 1,900 rpm (879 kW @ 1900 rpm) |
| Maximum torque (ft-lbs): | 3,739 @ 1,350 rpm |
Brakes
| Brakes standard: | ISO 3450 |
| Front brake surface (in2): | 6075 |
| Rear brake surface (in2): | 11138 |
| Service brakes | |
| Parking brake type: | Spring applied, multiple-disc type |
| Retarder: | Oil-cooled, multiple-disc front and rear brakes act as retarder |
| Front brake type: | Fully hydraulic control, oil-cooled multiple-disc type |
| Rear service brakes: | Fully hydraulic control, oil-cooled multiple-disc type |
| Service parking brakes: | Spring applied, multiple-disc type |
| Service retarder brakes: | Oil-cooled, multiple-disc front and rear brakes act as retarder |
| Secondary service brakes: | Manual pedal operation when hydraulic pressure drops below the rated level, parking brake is automatically actuated |
| Brake surface | |
| Front (in2): | 6075 |
Transmission
| Torque converter: | 3 elements, 1 stage, 2 phase |
| Transmission: | Full-automatic, planetary type |
| Speed range: | Seven speeds forward and two reverse |
| Lockup clutch: | Wet, multiple-disc clutch |
| Forward: | Torque converter drive in 1st gear, direct drive in 1st lockup and all higher gears |
| Reverse: | Torque converter drive and direct (lockup) |
| Shift control: | Electronic shift control with automatic clutch modulation in all gears |
| Maximum travel speed (mph): | 40.4 |
Service refill capacities
| Fuel tank (US gal): | 349.2 |
| Hydraulic system (US gal): | 101.7 |
| Engine oil (US gal): | 36.5 |
| Torque converter transmission retarder (US gal): | 140 |
| Differentials (US gal): | 59.6 |
| Final drive (US gal): | 30.6 |
| Suspension (US gal): | 24.5 |
Steering system
| Minimum turning radius wall to wall (ft): | 33 ft. 2 in |
| Steering system type: | Fully hydraulic power steering with two double-acting cylinder |
| Secondary steering: | Automatic/Manual control |
| Maximum steering angle (degrees): | 41 |
Axles
| Rear axle: | Full-floating |
| Final drive type: | Planetary gear |
| Differential ratio: | 2.944 |
| Planetary ratio: | 7.235 |
Main frame
| Articulated type: | Box-sectioned structure |
Weight
| Empty weight (lbs): | 162,701 (including 176 lbs operator) |
| Gross vehicle weight (lbs): | 365,967 |
| Loaded | |
| Front axle - loaded (%): | 33.2 |
| Rear axles - loaded (%): | 66.8 |
| Empty | |
| Front axle - empty (%): | 51.5 |
| Rear axles - empty (%): | 48.5 |
Tires
| Standard tire: | 27.00 R49 |
Cab
| FOPS and ROPS standard: | FOPS (ISO 3449 level II), ROPS (ISO 3471) |
- Engine and related components:
- Air cleaner, double element with restriction indicator (qty 2)
- Auto Idle Shutdown
- Automatic Idling Setting System (AISS)
- Electric priming fuel pump
- Engine, KOMATSU SAA12V140E-7, 12 cylinder, turbocharged, after cooled, EGR cooled, diesel
Gross HP: 895 kW / 1900 RPM (SAE J1995)
Net HP: 849 kW / 1900 RPM (ISO 9249 / SAE J1349) - Engine pre-lubrication system
- Engine secondary shutdown switch
- Fan, hydraulically driven, reversible
- Komatsu diesel particulate filter (KDPF) (qty 2)
- Radiator, lead free, modular core
- Electrical system:
- Alternator, 140 amp, 24 volt
- Back-up alarm
- Batteries, 4 x 12V
- Battery isolator
- Electric circuit breakers, 24V
- Emergency stop switch, ground level
- Horn, electric
- Lights
- Access ladder lamps
- Back-up Lamps, rear
- Engine compartment lamp
- Fog lamps
- Head lamps, high and low beam, LED
- Side working lamps, LH & RH, LED
- Stop and tail Lamps, LED
- Turn signals, hazard warning, front & rear, LED
- Starter isolator
- Starting motors, 2 x 11.0 kW, electric
- Power train and controls:
- 7-speed transmission, fully automatic, (7F, 2R)
- Brake cooling oil recovery tank
- Brakes, oil cooled, multiple disc, hydraulically controlled, front & rear
- Komatsu Traction Control System (KTCS)
- Neutral coast inhibitor
- Parking brake, integrated in front & rear brakes
- Retarder, automatic & manual
- Secondary brake, pedal actuated, variable
- Skip shift function
- Speed limiter
- Torque converter with electronic lockup control
- Operator environment:
- Cab with built-in ROPS/FOPS (ISO 3471/ISO 3449)
- 12V outlet (qty 2)
- Automatic climate control system with Cab pressurization
- Body hoist control, electric
- Cigarette lighter and ashtray
- Cup holder
- Door, LH & RH
- KomVision camera system with dedicated monitor
- Machine monitor with 7" color LCD display
- Mode selection system with Variable Horsepower Control (VHPC)
- Operator seat, air suspension, heated, ventilated with 3-point 3" retractable seat belt
- Power windows, LH & RH
- Radio, AM/FM with aux input, USB, & bluetooth
- Rearview mirror, outside Cab mount, heated (qty 2)
- Rearview monitoring system with dedicated monitor
- Secondary steering, automatic & manual
- Steering wheel, tilt and telescopic
- Sunvisor (qty 2)
- Tinted glass with electric defogger
- Trainer seat with 3" retractable lap belt
- Underview mirror
- Wiper/washer, windshield (intermittent)
- Diagonal access stairway
- Cab with built-in ROPS/FOPS (ISO 3471/ISO 3449)
- Guard and cover group:
- Cab & platform guard
- Catwalk with handrails, skid resistant
- Driveline guards, front & rear
- Engine side covers
- Engine underguard
- Exhaust thermal guard
- Fire safety shield (located behind Engine)
- Mud flaps
- Rock ejector bars
- Transmission underguard
- Other standard equipment:
- Anchor points, tie off type (ISO 14567)
- Automatic Retard Speed Control (ARSC)
- Cold weather package (electric heaters for Engine oil & coolant heater)
- Dump counter
- Ecology guidance and ecology gauge
- Engine oil & coolant heater, electric
- Fast fill coupler for fuel tank
- Filler cap lock & cover lock
- Ground level service center
- Centralized KOWA sampling
- Fluids ports
- Transmission, Engine, brake control, steering and hoist oil
- Hydropneumatic Suspension, Front & Rear
- Jump start receptacle
- KOMTRAX Plus®
- Machine immobilization switch
- Overload prevention system
- Overrun warning and prevention
- Overturn warning system
- Payload meter
- PM service connectors
- Rims for 27.00 R49 Tires with large bore valve stems (qty 6)
- Safety pins (qty 2)
- Wheel chocks (qty 2)
- Body:
- Dump Body, 78.5 yd3
- Steel liners for rock Body (78.5 yd3)
- Body heating kit
- Tires:
- Michelin XDR2B (qty 6)
- Bridgestone VMTP (qty 6)
- Others:
- Power boarding ladder
Features and benefits
Auto idle shutdown
Control unnecessary fuel consumption. When the engine is idling for the set time, adjustable from five to 60 minutes, the auto idle shutdown function automatically stops and applies the parking brake.
Selectable operating modes
Your operator can choose between two operating modes: Economy mode to save fuel or Power mode for enhanced performance.
Variable Horsepower Control
The Variable Horsepower Control system is designed to deliver you high production with low fuel consumption. It automatically detects whether the machine is loaded or unloaded and selects the best horsepower setting.
Turning radius
The MacPherson-strut-type independent front suspension features an A-arm design for wider spacing and easy access to the engine bay. The turning angle is a tight turning radius of 33' 2." The smooth ride helps to reduce material spillage, too.
Wet multiple-disc brakes and retarder
Fully hydraulic-controlled wet multiple-disc brakes on all four wheels help promote reliable and stable brake performance. Large-capacity, continuously-oil-cooled, multiple-disc brakes also function as a responsive retarder for operator confidence at higher downhill speeds.
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.
Automatic Retard Speed Control
The Automatic Retard Speed Control (ARSC) allows your operator to set the desired downhill travel speed. The ARSC system automatically applies the brake retarder to maintain that setting, enabling the operator to stay focused on the haul road.
Komatsu Traction Control System
The Komatsu Traction Control System (KTCS) monitors the rear wheels for slippages and automatically applies the brakes independently to each wheel for enhanced traction. This function occurs automatically without operator input and without compromising steering performance.
All-around monitoring
KomVision provides your operator with a 360-degree view of the surrounding work area on a dedicated monitor located in the dash via a six-camera system.
Integrated Payload Meter
Enhance payloads, promote productivity and control the life cycle costs of your truck. The Integrated Payload Meter (PLM) manages the payload of each hauling cycle, analyzing the production volume and the working conditions of the machine.
Ground-level service center
Designed for quick preventative maintenance and servicing. A ground-level service center is located at the bottom of the hydraulic tank: Engine oil, transmission and brake cooling oil, brake control oil and hydraulic oil filling ports are accessible in one location.
Zero-harm features
Lockable battery and starter isolators are accessible from the ground level. A machine immobilization switch enables engine ignition yet disables steering and hoist operation while preventing parking brake release. An emergency engine stop switch shuts down the engine from the ground level.