- Category: Off-Highway Trucks ➔
- Manufacturer: Caterpillar ➔
- Model: 789C ➔
The Caterpillar 789C Off-Highway Truck is a powerhouse designed for heavy-duty hauling in mining and construction operations. With a gross weight of 310,525 lbs and a capacity of up to 102 cubic yards, this rigid-articulated truck boasts a robust Cat 3516B engine delivering 1900 horsepower. Its six-speed planetary power shift transmission allows for smooth operation, while its impressive dump height of 39.3 feet and top speed of 32.7 mph enable efficient material transport. Equipped with advanced features and high-end components, the 789C is a reliable and efficient workhorse for tackling challenging terrains and demanding tasks.
General Specifications
Approximate Weights - Dual Slope
| Gross Weight - Empty | 310,525 lbs (140,852 kg)
|
Approximate Weights - Flat Floor
| Body | 66,200 lbs (30,028 kg)
|
| Chassis | 225,400 lbs (102,240 kg)
|
Articulating/Rigid
Body Hoists
| Body Lower Time - Float | 17.3 seconds
|
| Body Raise Time - High Idle | 18.9 seconds
|
| Pump Flow - High Idle | 193 gpm (731 lpm)
|
| Relief Valve Setting - Lower | 96 psi
|
| Relief Valve Setting - Raise | 2500 psi
|
Capacity - Dual Slope - 100% Fill Factor
| Heaped 2:1 (SAE) | 102 cu yd (78 cu m)
|
| Struck | 96 cu yd (73 cu m)
|
Capacity - Flat Floor - 100% Fill Factor
| Struck | 102 cu yd (78 cu m)
|
Dimensions
| Dump Ground Clearance | 4 ft (1 m)
|
| Dump Height | 39 ft (12 m)
|
| Ground Clearance | 4 ft (1 m)
|
| Overall Height | 20 ft (6 m)
|
| Overall Length | 40 ft (12 m)
|
| Overall Width | 25 ft (8 m)
|
| Wheelbase | 19 ft (6 m)
|
DRIVE SYSTEM
Dump
| Dump Angle | 49.5 degrees
|
| Load Capacity - heaped | 137 cu yd (105 cu m)
|
| Load Capacity - Struck | 102 cu yd (78 cu m)
|
| Lower Time | 17.3 seconds
|
| Raise Time | 18.9 seconds
|
Engine
| Bore | 7 in (17 cm)
|
| Displacement | 4,211 cu in (69,006 cu cm)
|
| Engine Model | Cat 3516B EUI
|
| Gross Power | 1,900 hp (1,417 kw)
|
| Gross Power - SAE J1995 | 1,900 hp (1,417 kw)
|
| Make | Cat
|
| Net Power | 1,770 hp (1,320 kw)
|
| Net Power - 80/1269/EEC | 1,791 hp (1,336 kw)
|
| Net Power - ISO 9249 | 1,791 hp (1,336 kw)
|
| Net Power - SAE J1349 | 1,771 hp (1,321 kw)
|
| Number of Cylinders | 16
|
| Power Measured @ | 1750 rpm
|
| Rated Engine Speed | 140 rpm
|
| Stroke | 8 in (19 cm)
|
| Torque Measured @ | Turbocharged rpm
|
| Torque Rise | 15.6
|
Final Drives
Operating Specifications
| Body Capacity - SAE 2:1 | 137 cu yd (105 cu m)
|
| Brake/Hoist System Fluid Capacity | 240 gal (908 l)
|
| Cooling System Fluid Capacity | 175 gal (662 l)
|
| Diff and Final Drive Fluid Capacity | 154 gal (583 l)
|
| Engine Oil Capacity | 20 gal (76 l)
|
| Fuel Capacity | 851 gal (3,221 l)
|
| Hydraulic System Fluid Capacity | 140 gal (530 l)
|
| Operating Voltage | 24 volts
|
| Steering System Fluid Capacity | 50 gal (189 l)
|
| Tire Size | 37.00-R57(E4)
|
| Top Speed - Loaded | 33 mph (53 kph)
|
| Turning Diameter - Front | 99 ft (30 m)
|
ROPS
Service Refill Capacities
| Brake / Hoist / Fan Hydraulic Tank | 137 gal (519 l)
|
| Brake Hoist System - Includes Tank | 240 gal (908 l)
|
| Cooling System | 175 gal (662 l)
|
| Fuel Tank - Optional | 26800-29,950 kg (59,084-66,028 lbs) |
| Fuel Tank - Standard | 851 gal (3,221 l)
|
| Steering System - Including Tank | 50 gal (189 l)
|
| Steering Tank | 34 gal (129 l)
|
Suspension
| Effective Cylinder Stroke - Rear | 4 in (9 cm)
|
| Rear axle - Oscillation | 4 degrees
|
Transmission
| Forward - 1 | 7 mph (12 kph)
|
| Forward - 2 | 10 mph (16 kph)
|
| Forward - 3 | 13 mph (21 kph)
|
| Forward - 4 | 18 mph (29 kph)
|
| Forward - 5 | 24 mph (39 kph)
|
| Forward - 6 | 33 mph (53 kph)
|
| Max Speed | 33 mph (53 kph)
|
| Number of Gears - Forward | 6
|
| Number of Gears - Reverse | 1
|
| Reverse | 7 mph (10 kph)
|
| Transmission Type | Six-speed planetary power shift with direct injection
|
Weights
| Body Weight | 225,500 lbs (102,285 kg)
|
| Body Weight Range | 26 800-29 950 kg (59000-71500 lb)
|
| Empty Weight | 299,101 lbs (135,670 kg)
|
| Front Axle - Empty | 47%
|
| Front Axle - Loaded | 33%
|
| Loaded Weight | 700,000 lbs (317,515 kg)
|
| Operating Weight - Loaded | SAE J1511 OCT90 ISO 5010:1992 lbs
|
| Rear Axle - Empty | 53%
|
| Rear Axle - Loaded | 67%
|
| Weight Distribution Front - empty | 47%
|
| Weight Distribution Front - loaded | 33%
|
| Weight Distribution Rear - empty | 53%
|
| Weight Distribution Rear - loaded | 67%
|
