Caterpillar 789C Dump Truck

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

Articulating/Rigid 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

Drive Config 4×2

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
Model 3516B
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

Planetary Ratio 10.83:1

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

ROPS/FOPS Standards 59625

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 26,800-29,950 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 (59,000-71,500 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%
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