CAT 789C Haul Truck

Dimensions

Overall Length 39.92 ft in (12177 mm)
Overall Width 25.18 ft in (7674 mm)
Overall Height 20.25 ft in (6182 mm)
Wheelbase 18.68 ft in (5700 mm)
Ground Clearance 3.83 ft in (1173 mm)
Dump Height 39.25 ft in (11950 mm)
Dump Ground Clearance 4.37 ft in (1330 mm)

Dump

Dump Angle 49.5 degrees
Load Capacity – Struck 102 yd3 (92 m3)
Load Capacity – Heaped 137.34 yd3 (105 m3)
Rated Payload 390000 lb (176901.04 kg)
Lower Time 17.3 sec
Raise Time 18.9 sec

Engine Details

Number Of Cylinders 16
Engine Make CAT
Engine Model 3516B EUI
Gross Power 1900 hp (1417 kw)
Net Power 1770.2 hp (1320 kw)
Power Measured @ 1750 rpm
Aspiration Turbocharged
Displacement 4211 cu in (69.1 L)
Bore 6.7 in (170.2 mm)
Stroke 7.5 in (190.5 mm)
Net Power – Iso 9249 1791 hp (1335.6 kw)
Net Power – Sae J1349 1771 hp (1320.7 kw)
Net Power – 80/1269/Eec 1791 hp (1335.6 kw)
Gross Power – Sae J1995 1900 hp (1416.9 kw)
Engine Model Cat 3516B EUI

Operational Specs

Fuel Tank Capacity 851 gal (3222 L)
Cooling System Fluid Capacity 175 gal (663 L)
Engine Oil Capacity 20 gal (76 L)
Diff And Final Drive Fluid Capacity 154 gal (583 L)
Steering System Fluid Capacity 50 gal (189 L)
Brake/Hoist System Fluid Capacity 240 gal (909 L)
Hydraulic System Fluid Capacity 140 gal (531 L)
Operating Voltage 24 V
Alternator Supplied Amperage 75 amps
Tire Size 37.00-R57(E4)

Transmission

Transmission Type Six-speed planetary power shift with direct injection
Number Of Gears – Forward 6
Number Of Gears – Reverse 1
Max Speed 32.7 mph (52.6 km/h)
Reverse 6.5 mile/h
Forward – 1 7.2 mph (11.6 km/h)
Forward – 2 9.8 mph (15.8 km/h)
Forward – 3 13.2 mph (21.3 km/h)
Forward – 4 17.8 mph (28.7 km/h)
Forward – 5 24.2 mph (39 km/h)
Forward – 6 32.7 mph (52.7 km/h)

Steering

Steering Standards SAE J1511 OCT90 ISO 5010:1992

Weights

Empty Weight 299100.8 lb (135670 kg)
Loaded Weight 700000 lb (317515 kg)
Weight Distribution Front – Empty 47 %
Weight Distribution Rear – Empty 53 %
Weight Distribution Front – Loaded 33 %
Weight Distribution Rear – Loaded 67 %

Tires

Standard Tires 37.00-R57 (E4)

Brakes

Brake Surface – Front 12662 in2 (8.2 m2)
Brake Surface – Rear 18024 in2 (11.7 m2)
Standards SAE J1473 OCT90 ISO 3450:1996

Body Hoists

Pump Flow – High Idle 193 gal/min
Relief Valve Setting – Raise 2500 psi
Body Raise Time – High Idle 18.9 s
Body Lower Time – Float 17.3 s
Body Power Down – High Idle 15.6 s

Final Drives

Planetary Ratio 10.83:1
Differential Ratio 2.35:1
Total Reduction Ratio 25.46:1

Operating Specifications

Top Speed – Loaded 32.7 mph (52.7 km/h)
Steer Angle 36 degrees
Body Capacity – Sae 2:1 137 yd3 (104.8 m3)
Turning Diameter – Front 90.2 ft in (27.5 m)
Nominal Payload Capacity 390000 lb (176900.9 kg)
Turning Circle – Clearance Diameter 99.2 ft in (30.3 m)

Service Refill Capacities

Cooling System 175 gal (662.5 L)
Differential – Final Drives 154 gal (583 L)
Steering Tank 34 gal (128.8 L)
Steering System – Including Tank 50 gal (189.3 L)
Brake Hoist System – Includes Tank 240 gal (908.5 L)
Crankcase 77 gal (291.5 L)
Brake/Hoist Hydraulic Tank 140 gal (530 L)
Torque Converter/Transmission System – Including Sump 20 gal (75.8 L)
Fuel Tank – Standard 851 gal (3221.4 L)
Torque Converter – Transmission Sump 59 gal (223.4 L)

Weight Distributions – Approximate

Front Axle – Empty 47 %
Front Axle – Loaded 33 %
Rear Axle – Empty 53 %
Rear Axle – Loaded 67 %

Weights – Approximate

Chassis Weight 218300 lb (99019.3 kg)
Gross Machine Operating Weight 700000 lb (317514.7 kg)
Body Weight Range 26 800-29 950 kg (59,000-71,500 lb)

Capacity – Dual Slope – 100% Fill Factor

Struck 96 yd3 (73.4 m3)
Heaped (Sae 2:1) 137 yd3 (104.8 m3)

Capacity – Flat Floor – 100% Fill Factor

Struck 102 yd3 (78 m3)
Heaped (Sae 2:1) 158 yd3 (120.8 m3)

Suspension

Effective Cylinder Stroke – Front 4 in (101.6 mm)
Effective Cylinder Stroke – Rear 3.5 in (88.9 mm)

Approximate Weights – Dual Slope

Body 59625 lb (27045.5 kg)
Chassis 225500 lb (102285.1 kg)
Gross Weight – Empty 310525 lb (140851.8 kg)
Full Liner 20840 lb (9452.9 kg)
Tail Extension 1700 lb (771.2 kg)
Side Boards 2860 lb (1297.3 kg)

Approximate Weights – Flat Floor

Body 66200 lb (30027.9 kg)
Chassis 225400 lb (102239.8 kg)
Gross Weight – Empty 299100 lb (135669.5 kg)
Grid Liner 3300 lb (1496.9 kg)
Rear – Third Liner 4200 lb (1905.1 kg)
Ask a question