Caterpillar 789C Off-Highway Truck Specs

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.

Approximate Weights - Dual Slope

Caterpillar 789C Off-Highway Truck Approximate Weights - Dual Slope specifications
Body	59,625.00 lbs (27,045.48 kg)
Chassis	225,500.00 lbs (102,285.21 kg)
Full Liner	20,840.00 lbs (9,452.88 kg)
Gross Weight - Empty	310,525.00 lbs (140,851.95 kg)
Side Boards	2,860.00 lbs (1,297.28 kg)
Tail Extension	1,700.00 lbs (771.11 kg)

Approximate Weights - Flat Floor

Caterpillar 789C Off-Highway Truck Approximate Weights - Flat Floor specifications
Body	66,200.00 lbs (30,027.85 kg)
Chassis	225,400.00 lbs (102,239.85 kg)
Grid Liner	3,300.00 lbs (1,496.86 kg)
Gross Weight - Empty	299,100.00 lbs (135,669.65 kg)
Rear - Third Liner	4,200.00 lbs (1,905.09 kg)

Body Hoists

Caterpillar 789C Off-Highway Truck Body Hoists specifications
Body Lower Time - Float	17.3 s
Body Power Down - High Idle	15.6 s
Body Raise Time - High Idle	18.9 s
Pump Flow - High Idle	193.00 gpm (730.51 lpm)
Relief Valve Setting - Raise	2500 psi

Brakes

Caterpillar 789C Off-Highway Truck Brakes specifications
Brake Surface - Front	12662 in2
Brake Surface - Rear	18024 in2
Standards	SAE J1473 OCT90 ISO 3450:1996

Capacity - Dual Slope - 100% Fill Factor

Caterpillar 789C Off-Highway Truck Capacity - Dual Slope - 100% Fill Factor specifications
Heaped (Sae 2:1)	137 cu yd
Struck	96 cu yd

Capacity - Flat Floor - 100% Fill Factor

Caterpillar 789C Off-Highway Truck Capacity - Flat Floor - 100% Fill Factor specifications
Heaped (Sae 2:1)	158 cu yd
Struck	102 cu yd

Dimensions

Caterpillar 789C Off-Highway Truck Dimensions specifications
Dump Ground Clearance	4.37 ft (1.33 m)
Dump Height	39.25 ft (11.96 m)
Ground Clearance	3.83 ft (1.17 m)
Overall Height	20.25 ft (6.17 m)
Overall Length	39.92 ft (12.17 m)
Overall Width	25.18 ft (7.67 m)
Wheelbase	18.68 ft (5.69 m)

Dump

Caterpillar 789C Off-Highway Truck Dump specifications
Dump Angle	49.5 degrees
Load Capacity - Heaped	137.34 cu yd
Load Capacity - Struck	102 cu yd
Lower Time	17.3 sec
Raise Time	18.9 sec
Rated Payload	390,000.00 lbs (176,901.24 kg)

Engine

Caterpillar 789C Off-Highway Truck Engine specifications
Aspiration	Turbocharged
Bore	6.70 in (17.02 cm)
Displacement	4,211.00 cu in (69,006.08 cu cm)
Engine Make	2236
Engine Model	3516B EUI
Gross Power	1,900.00 hp (1,416.85 kw)
Gross Power - Sae J1995	1,900.00 hp (1,416.85 kw)
Net Power	1,770.20 hp (1,320.06 kw)
Net Power - 80/1269/Eec	1,791.00 hp (1,335.57 kw)
Net Power - Iso 9249	1,791.00 hp (1,335.57 kw)
Net Power - Sae J1349	1,771.00 hp (1,320.66 kw)
Number Of Cylinders	16
Power Measured @	1750 rpm
Stroke	7.50 in (19.05 cm)

Final Drives

Caterpillar 789C Off-Highway Truck Final Drives specifications
Differential Ratio	2.35:1
Planetary Ratio	10.83:1
Total Reduction Ratio	25.46:1

Operating Specifications

Caterpillar 789C Off-Highway Truck Operating Specifications specifications
Body Capacity - Sae 2:1	137 cu yd
Nominal Payload Capacity	390,000.00 lbs (176,901.24 kg)
Steer Angle	36 degrees
Top Speed - Loaded	32.70 mph (52.63 kph)
Turning Circle - Clearance Diameter	99.20 ft (30.24 m)
Turning Diameter - Front	90.20 ft (27.49 m)

Operational

Caterpillar 789C Off-Highway Truck Operational specifications
Alternator Supplied Amperage	75 amps
Brake/Hoist System Fluid Capacity	240.00 gal (908.40 l)
Cooling System Fluid Capacity	175.00 gal (662.38 l)
Diff And Final Drive Fluid Capacity	154.00 gal (582.89 l)
Engine Oil Capacity	20.00 gal (75.70 l)
Fuel Capacity	851.00 gal (3,221.04 l)
Hydraulic System Fluid Capacity	140.00 gal (529.90 l)
Operating Voltage	24 V
Steering System Fluid Capacity	50.00 gal (189.25 l)
Tire Size	37.00-R57(E4)

Service Refill Capacities

Caterpillar 789C Off-Highway Truck Service Refill Capacities specifications
Brake Hoist System - Includes Tank	240.00 gal (908.40 l)
Brake/Hoist Hydraulic Tank	140.00 gal (529.90 l)
Cooling System	175.00 gal (662.38 l)
Crankcase	77.00 gal (291.45 l)
Differential - Final Drives	154.00 gal (582.89 l)
Fuel Tank - Standard	851.00 gal (3,221.04 l)
Steering System - Including Tank	50.00 gal (189.25 l)
Steering Tank	34.00 gal (128.69 l)
Torque Converter - Transmission Sump	59.00 gal (223.32 l)
Torque Converter/Transmission System - Including Sump	20.00 gal (75.70 l)

Steering

Caterpillar 789C Off-Highway Truck Steering specifications
Steering Standards	SAE J1511 OCT90 ISO 5010:1992

Suspension

Caterpillar 789C Off-Highway Truck Suspension specifications
Effective Cylinder Stroke - Front	4.00 in (10.16 cm)
Effective Cylinder Stroke - Rear	3.50 in (8.89 cm)

Tires

Caterpillar 789C Off-Highway Truck Tires specifications
Standard Tires	37.00-R57 (E4)

Transmission

Caterpillar 789C Off-Highway Truck Transmission specifications
Forward - 1	7.20 mph (11.59 kph)
Forward - 2	9.80 mph (15.77 kph)
Forward - 3	13.20 mph (21.24 kph)
Forward - 4	17.80 mph (28.65 kph)
Forward - 5	24.20 mph (38.95 kph)
Forward - 6	32.70 mph (52.63 kph)
Max Speed	32.70 mph (52.63 kph)
Number Of Gears - Forward	6
Number Of Gears - Reverse	1
Reverse	6.5 mile/h
Transmission Type	Six-speed planetary power shift with direct injection

Weight Distributions - Approximate

Caterpillar 789C Off-Highway Truck Weight Distributions - Approximate specifications
Front Axle - Empty	47 %
Front Axle - Loaded	33 %
Rear Axle - Empty	53 %
Rear Axle - Loaded	67 %

Weights

Caterpillar 789C Off-Highway Truck Weights specifications
Empty Weight	299,100.80 lbs (135,670.01 kg)
Loaded Weight	700,000.00 lbs (317,515.05 kg)
Weight Distribution Front - Empty	47 %
Weight Distribution Front - Loaded	33 %
Weight Distribution Rear - Empty	53 %
Weight Distribution Rear - Loaded	67 %

Weights - Approximate

Caterpillar 789C Off-Highway Truck Weights - Approximate specifications
Body Weight Range	26 800-29 950 kg (59,000-71,500 lb)
Chassis Weight	218,300.00 lbs (99,019.34 kg)
Gross Machine Operating Weight	700,000.00 lbs (317,515.05 kg)