Caterpillar 785D Off-Highway Truck Specs

Category: Off-Highway Trucks ➔
Manufacturer: Caterpillar ➔
Model: 785D ➔

The Caterpillar 785D is a rigid-frame off-highway haul truck designed for large-scale mining and heavy earthmoving applications. Built for high-capacity material transport, the 785D is used in quarry, surface mining, and major construction operations where durability and payload efficiency are required. It features a diesel powertrain, heavy-duty suspension, and a reinforced chassis for operation on rough haul roads and demanding site conditions. The model is part of Caterpillar's off-highway truck lineup and is commonly configured for high-volume loading, long service life, and simplified maintenance access. The 785D remains a recognized machine in mining fleet applications.

General Specifications

Caterpillar 785D Off-Highway Truck General Specifications specifications
Articulated/Rigid	R — Starting 2019 Model Year
Drive Configuration	2WD — Starting 2019 Model Year
Engine Type	Cat 3512C HD — Starting 2019 Model Year
Mfg. Model	785D — Starting 2019 Model Year
Operating Weight	550,000.00 lbs (249,476.11 kg) — Starting 2019 Model Year
Planetary Powershift Transmission	Auto — Starting 2019 Model Year
Rated Payload	136.00 t (136,000.00 kg) — Starting 2019 Model Year

Body - Dual Slope

Caterpillar 785D Off-Highway Truck Body - Dual Slope specifications
Body Weight	49,150.00 lbs (22,294.09 kg)
Heaped (Sae 2:1)	102 cu yd

Body - X

Caterpillar 785D Off-Highway Truck Body - X specifications
Body Weight	55,468.00 lbs (25,159.89 kg)
Heaped (Sae 2:1)	111 cu yd

Body Hoists

Caterpillar 785D Off-Highway Truck Body Hoists specifications
Body Lower Time - Float	16.2 s
Body Lower Time - High Idle	15.9 s
Body Power Down - High Idle	15.9 s
Body Raise Time - High Idle	15.2 s
Pump Flow - High Idle	198.00 gpm (749.43 lpm)
Relief Valve Setting - Raise	2500 psi

Brakes

Caterpillar 785D Off-Highway Truck Brakes specifications
Brake Surface - Front	9497 in2
Brake Surface - Rear	13908 in2
Standards	SAE J1473 OCT90 ISO 3450-1985

Dimensions

Caterpillar 785D Off-Highway Truck Dimensions specifications
Dump Ground Clearance	3.94 ft (1.20 m)
Dump Height	38.75 ft (11.81 m)
Ground Clearance	3.24 ft (0.99 m)
Overall Height	16.81 ft (5.12 m)
Overall Length	37.89 ft (11.55 m)
Overall Width	21.79 ft (6.64 m)
Wheelbase	17.00 ft (5.18 m)

Dump

Caterpillar 785D Off-Highway Truck Dump specifications
Load Capacity - Heaped	102 cu yd
Lower Time	15.9 sec
Raise Time	15.2 sec
Rated Payload	300,000.00 lbs (136,077.88 kg)

Engine

Caterpillar 785D Off-Highway Truck Engine specifications
Bore	6.70 in (17.02 cm)
Displacement	3,573.60 cu in (58,560.94 cu cm)
Engine Make	2236
Engine Model	3512C HD
Gross Power	1,450.00 hp (1,081.28 kw)
Gross Power - Sae J1995	1,450.00 hp (1,081.28 kw)
Net Power	1,348.00 hp (1,005.22 kw)
Net Power - 80/1269/Eec	1,348.00 hp (1,005.22 kw)
Net Power - Cat	1,348.00 hp (1,005.22 kw)
Net Power - Iso 9249	1,348.00 hp (1,005.22 kw)
Net Power - Sae J1349	1,348.00 hp (1,005.22 kw)
Power Measured @	1750 rpm
Rated Power	1,450.00 hp (1,081.28 kw)
Stroke	8.40 in (21.34 cm)
Torque Rise	23 %

Final Drives

Caterpillar 785D Off-Highway Truck Final Drives specifications
Differential Ratio	2.10:1
Planetary Ratio	10.83:1
Total Reduction Ratio	22.75:1

Operating Specifications

Caterpillar 785D Off-Highway Truck Operating Specifications specifications
Machine Clearance Turning Diameter	108.90 ft (33.19 m)
Maximum Target Payload	314,000.00 lbs (142,428.18 kg)
Minimum Target Payload	288,000.00 lbs (130,634.76 kg)
Steer Angle	36 degrees
Target Payload - Dual Slope*	292,000.00 lbs (132,449.14 kg)
Top Speed - Loaded	34.00 mph (54.72 kph)
Turning Diameter - Front	97.70 ft (29.78 m)

Operational

Caterpillar 785D Off-Highway Truck Operational specifications
Brake/Hoist System Fluid Capacity	169.40 gal (641.18 l)
Cooling System Fluid Capacity	100.20 gal (379.26 l)
Diff And Final Drive Fluid Capacity	115.20 gal (436.03 l)
Engine Oil Capacity	53.90 gal (204.01 l)
Fuel Capacity	500.10 gal (1,892.88 l)
Hydraulic System Fluid Capacity	89.10 gal (337.24 l)
Steering System Fluid Capacity	31.00 gal (117.34 l)
Tire Size	33.00-51 50PR (E3 & E4)

Rops

Caterpillar 785D Off-Highway Truck Rops specifications
Rops Standards	SAE J1040 APR88 ISO 3471:1994

Service Refill Capacities

Caterpillar 785D Off-Highway Truck Service Refill Capacities specifications
Brake Hoist System - Includes Tank	169.00 gal (639.67 l)
Brake/Hoist Hydraulic Tank	89.00 gal (336.87 l)
Cooling System	100.00 gal (378.50 l)
Crankcase	54.00 gal (204.39 l)
Differential - Final Drives	115.00 gal (435.28 l)
Fuel Tank - Standard	500.00 gal (1,892.50 l)
Steering System - Including Tank	31.00 gal (117.34 l)
Steering Tank	24.00 gal (90.84 l)
Torque Converter/Transmission System - Including Sump	65.60 gal (248.30 l)

Sound

Caterpillar 785D Off-Highway Truck Sound specifications
Sound Standards	ANSI/SAE J1166 MAY90 SAE J88 APR95

Steering

Caterpillar 785D Off-Highway Truck Steering specifications
Steering Standards	SAE J1511 OCT90 ISO 5010:1992

Suspension

Caterpillar 785D Off-Highway Truck Suspension specifications
Effective Cylinder Stroke - Front	12.10 in (30.73 cm)
Effective Cylinder Stroke - Rear	6.50 in (16.51 cm)

Tires

Caterpillar 785D Off-Highway Truck Tires specifications
Standard Tires	33.00-R51 (E3 & E4)

Transmission

Caterpillar 785D Off-Highway Truck Transmission specifications
Forward - 1	7.50 mph (12.07 kph)
Forward - 2	10.20 mph (16.42 kph)
Forward - 3	13.80 mph (22.21 kph)
Forward - 4	18.60 mph (29.93 kph)
Forward - 5	25.20 mph (40.56 kph)
Forward - 6	34.00 mph (54.72 kph)
Max Speed	34.00 mph (54.72 kph)
Number Of Gears - Forward	6
Number Of Gears - Reverse	1
Reverse	6.8 mile/h

Weight Distributions - Approximate

Caterpillar 785D Off-Highway Truck Weight Distributions - Approximate specifications
Front Axle - Empty*	45-46%
Front Axle - Loaded - Target	33 %
Rear Axle - Empty*	54-55%
Rear Axle - Loaded - Target	67 %

Weights

Caterpillar 785D Off-Highway Truck Weights specifications
Empty Weight	259,257.00 lbs (117,597.14 kg)
Loaded Weight	550,000.40 lbs (249,476.29 kg)
Weight Distribution Front - Empty	46 %
Weight Distribution Front - Loaded	33 %
Weight Distribution Rear - Empty	55 %
Weight Distribution Rear - Loaded	67 %

Weights - Approximate

Caterpillar 785D Off-Highway Truck Weights - Approximate specifications
Body Weight Range	20 831 - 30 623 kg 45,924 - 67,512 lb
Gross Machine Operating Weight (Gmw)	550,000.00 lbs (249,476.11 kg)
Minimum/Maximum Operating Chassis Weight Range (Ocw)	83 304 - 84 668 kg 183,654 - 186,661 lb
Minimum/Maximum Operating Chassis Weight Range Empty (Eomw)	106 218 - 117 597 kg 234,170 - 259,257 lb