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Cat 785C and 785D specifications

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Short answer

Cat 785C and 785D: rigid rock trucks.

Selected configuration figures
ConfigurationDocumented field and quantity
785C
Gross Power
1,451 hp
Operating Weight - Empty - Flat Floor Body
225,200 lb
785D
Gross Power
1,450 hp
Pump Flow - High Idle
198 gpm
785C and 785D specification matrix — Listing labels reported by the source
Publisher nameSource guideListing-entry countLabels named by the source
Cat785C and 785D2785C and 785D
Dimensions and weight
Specification785C785D
Overall Length36.25 ft37.89 ft
Overall Width20.6 ft21.79 ft
Overall Height19 ft16.81 ft
Wheelbase17 ft17 ft
Ground Clearance3.24 ft3.24 ft
Dump Height36.83 ft38.75 ft
Dump Ground Clearance4.21 ft3.94 ft
Dump
Specification785C
Dump Angle49 degrees
Load Capacity - Struck96 yd3
Specification785C785D
Load Capacity - Heaped119 yd3102 yd3
Rated Payload300,000 lb300,000 lb
Lower Time15.9 sec15.9 sec
Raise Time15.2 sec15.2 sec
Engine
Specification785C
Number Of Cylinders16
AspirationTurbocharged
Specification785C785D
Engine Model3512B-EUI3512C HD
Gross Power1,451 hp1,450 hp
Net Power1,348 hp1,348 hp
Power Measured @1,750 rpm1,750 rpm
Displacement3,158 cu in3,574 cu in
Torque Rise23 %23 %
Bore6.7 in6.7 in
Stroke7.5 in8.4 in
Net Power - Cat1,348 hp1,348 hp
Net Power - ISO 92491,348 hp1,348 hp
Net Power - SAE J13491,348 hp1,348 hp
Net Power - 80/1269/Eec1,348 hp1,348 hp
Gross Power - SAE J19951,450 hp1,450 hp
Specification785D
Rated Power1,450 hp
Operational
Specification785C785D
Fuel Capacity500 gal500.1 gal
Cooling System Fluid Capacity100 gal100.2 gal
Engine Oil Capacity24 gal53.9 gal
Diff And Final Drive Fluid Capacity115 gal115.2 gal
Steering System Fluid Capacity31 gal31 gal
Brake/Hoist System Fluid Capacity89 gal169.4 gal
Hydraulic System Fluid Capacity169.4 gal89.1 gal
Tire Size33.00-R51 tires33.00-51 50PR (E3 & E4)
Specification785C
Operating Voltage24 V
Alternator Supplied Amperage75 amps
Transmission and speeds
Specification785C
Transmission TypeSix-speed planetary
Specification785C785D
Number Of Gears - Forward66
Number Of Gears - Reverse11
Max Speed34 mph34 mph
Reverse6.8 mph6.8 mph
Forward - 17.5 mph7.5 mph
Forward - 210.2 mph10.2 mph
Forward - 313.8 mph13.8 mph
Forward - 418.6 mph18.6 mph
Forward - 525.2 mph25.2 mph
Forward - 634 mph34 mph
Steering
Specification785C785D
Steering StandardsSAE J1511 OCT90 ISO 5010:1992SAE J1511 OCT90 ISO 5010:1992
Weights
Specification785C785D
Empty Weight225,200 lb259,257 lb
Loaded Weight550,000 lb550,000 lb
Weight Distribution Front - Empty47 %46 %
Weight Distribution Rear - Empty53 %55 %
Weight Distribution Front - Loaded33 %33 %
Weight Distribution Rear - Loaded67 %67 %
Tires
Specification785C785D
Standard Tires33.00-R51 (E4) 33.00-R51 (E3)33.00-R51 (E3 & E4)
Brakes
Specification785C785D
Brake Surface - Front9,497 in29,497 in2
Brake Surface - Rear13,908 in213,908 in2
StandardsSAE J1473 OCT90 ISO 3450-1985SAE J1473 OCT90 ISO 3450-1985
Body Hoists
Specification785C785D
Pump Flow - High Idle198 gpm198 gpm
Relief Valve Setting - Raise2,500 psi2,500 psi
Body Raise Time - High Idle15.2 s15.2 s
Body Lower Time - Float16.2 s16.2 s
Body Power Down - High Idle15.9 s15.9 s
Body Lower Time - High Idle15.9 s15.9 s
Final Drives
Specification785C785D
Planetary Ratio10.83:110.83:1
Differential Ratio2.10:12.10:1
Total Reduction Ratio22.75:122.75:1
Operating Specifications
Specification785C785D
Top Speed - Loaded34 mph34 mph
Steer Angle36 degrees36 degrees
Turning Diameter - Front90.2 ft97.7 ft
Machine Clearance Turning Diameter100.4 ft108.9 ft
Specification785C
Raise Time15.2 s
Lower Time15.9 s
Nominal Payload Capacity300,000 lb
SAE (2:1) Capacity102 yd3
Specification785D
Minimum Target Payload288,000 lb
Maximum Target Payload314,000 lb
Target Payload - Dual Slope*292,000 lb
Service Refill Capacities
Specification785C785D
Cooling System100 gal100 gal
Differential - Final Drives115 gal115 gal
Steering Tank24 gal24 gal
Steering System - Including Tank31 gal31 gal
Brake Hoist System - Includes Tank169 gal169 gal
Crankcase54 gal54 gal
Brake/Hoist Hydraulic Tank89 gal89 gal
Torque Converter/Transmission System - Including Sump65.6 gal65.6 gal
Fuel Tank - Standard500 gal500 gal
Weight Distributions Approximate
Specification785C
Front Axle - Empty47 %
Front Axle - Loaded33 %
Rear Axle - Empty53 %
Rear Axle - Loaded67 %
Specification785D
Front Axle - Loaded - Target33 %
Rear Axle - Loaded - Target67 %
Front Axle - Empty*45-46%
Rear Axle - Empty*54-55%
Weights Approximate
Specification785C
Chassis Weight164,134 lb
Gross Machine Operating Weight550,000 lb
Operating Weight - Empty - Flat Floor Body225,200 lb
Operating Weight - Empty - Dual-Slope Body211,035 lb
Specification785D
Body Weight Range20 831 - 30 623 kg 45,924 - 67,512 lb
Gross Machine Operating Weight (Gmw)550,000 lb
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
Capacity Dual Slope 100% Fill Factor
Specification785C
Struck74 yd3
Heaped (SAE 2:1)102 yd3
Capacity Flat Floor 100% Fill Factor
Specification785C
Struck96 yd3
Heaped (SAE 2:1)119 yd3
ROPS
Specification785C785D
ROPS StandardsSAE J1040 APR88 ISO 3471:1994SAE J1040 APR88 ISO 3471:1994
Sound
Specification785C785D
Sound StandardsANSI/SAE J1166 MAY90 SAE J88 APR95ANSI/SAE J1166 MAY90 SAE J88 APR95
Suspension
Specification785C785D
Effective Cylinder Stroke - Front12.1 in12.1 in
Effective Cylinder Stroke - Rear6.5 in6.5 in
Approximate Weights Dual Slope
Specification785C
Body46,865 lb
Chassis164,134 lb
Gross Weight - Empty211,035 lb
Approximate Weights Flat Floor
Specification785C
Body56,630 lb
Gross Weight - Empty225,200 lb
Standard Liner4,400 lb
Body Dual Slope
Specification785D
Body Weight49,150 lb
Heaped (SAE 2:1)102 yd3
Body X
Specification785D
Body Weight55,468 lb
Heaped (SAE 2:1)111 yd3
Variants — Source comparison annotation
Source guideDiffering-field count reported
785C and 785D77
Ratios
Figure785C785D
Engine horsepower per 1,000 lb of weight6.05.2
Fuel tank per engine horsepower0.37 gal0.37 gal
Rated payload per cubic yard of heaped body2,521 lb2,941 lb
Figure785C
Rated payload as a share of empty weight133%
Reference directory classification
Equipment grouprigid rock truck
785C and 785D: forum references — Forum-title search
Forum indexEquipment class queriedNames in the searchMatching titles
Heavy Equipment Forumsrigid rock truckCat and the 785 line that the 785C, 785D belongs to (no title names the exact model). That is too few titles to say what owners mostly ask about, so the most recent are listed instead2
Used market for the 785C and 785D — Dated first-page listing snapshot
Observation dateListing sourceEquipment searchListings
2026-09-24MachineryTraderCat rigid rock truck8
ModelListedModel yearsLowest askingHighest askingMedian askingMedian hours
785C42004 to 2007$160,000$160,000$160,00056,000
785D42010 to 2012$750,000$750,000$750,000None shown
785C and 785D: recall reference — Dated CPSC search
Search dateDatabaseNames queriedSearch result
2026-09-24U.S. Consumer Product Safety CommissionCat together with the rigid rock truck 785C, 785DNo matching recall in this search

Sources for this page

Evidence classDocument, classification and recorded date
Reference site
  • Reference site: Cat 785C — RitchieSpecs. Observed 2026-09-24.
Reference site
  • Reference site: Cat 785D — RitchieSpecs. Observed 2026-09-24.
Forum threads
Used-market listings
Federal agency data

Cat 785C and 785D: Configuration records

785C
SpecificationSource figure
Operating Specifications
Nominal Payload Capacity300,000 lb
SAE (2:1) Capacity102 yd3
Machine Clearance Turning Diameter100.4 ft
Engine
Gross Power1,451 hp
Net Power1,348 hp
Displacement3,158 cu in
Number Of Cylinders16
Engine Model3512B-EUI
Torque Rise23 %
Bore6.7 in
Stroke7.5 in
Net Power - Cat1,348 hp
Net Power - ISO 92491,348 hp
Net Power - SAE J13491,348 hp
Net Power - 80/1269/Eec1,348 hp
Gross Power - SAE J19951,450 hp
AspirationTurbocharged
Power Measured @1,750 rpm
Transmission and speeds
Number Of Gears - Forward6
Max Speed34 mph
Transmission TypeSix-speed planetary
Number Of Gears - Reverse1
Reverse6.8 mph
Forward - 17.5 mph
Forward - 210.2 mph
Forward - 313.8 mph
Forward - 418.6 mph
Forward - 525.2 mph
Forward - 634 mph
Sound
Sound StandardsANSI/SAE J1166 MAY90 SAE J88 APR95
Final Drives
Planetary Ratio10.83:1
Differential Ratio2.10:1
Total Reduction Ratio22.75:1
Service Refill Capacities
Cooling System100 gal
Differential - Final Drives115 gal
Steering Tank24 gal
Steering System - Including Tank31 gal
Brake Hoist System - Includes Tank169 gal
Crankcase54 gal
Brake/Hoist Hydraulic Tank89 gal
Torque Converter/Transmission System - Including Sump65.6 gal
Fuel Tank - Standard500 gal
Body Hoists
Pump Flow - High Idle198 gpm
Relief Valve Setting - Raise2,500 psi
Body Raise Time - High Idle15.2 s
Body Lower Time - Float16.2 s
Body Power Down - High Idle15.9 s
Body Lower Time - High Idle15.9 s
Suspension
Effective Cylinder Stroke - Front12.1 in
Effective Cylinder Stroke - Rear6.5 in
Tires
Standard Tires33.00-R51 (E4) 33.00-R51 (E3)
Steering
Steering StandardsSAE J1511 OCT90 ISO 5010:1992
ROPS
ROPS StandardsSAE J1040 APR88 ISO 3471:1994
Weights Approximate
Chassis Weight164,134 lb
Gross Machine Operating Weight550,000 lb
Operating Weight - Empty - Flat Floor Body225,200 lb
Operating Weight - Empty - Dual-Slope Body211,035 lb
Weights
Empty Weight225,200 lb
Loaded Weight550,000 lb
Weight Distribution Front - Empty47 %
Weight Distribution Rear - Empty53 %
Weight Distribution Front - Loaded33 %
Weight Distribution Rear - Loaded67 %
Dimensions and weight
Overall Width20.6 ft
Overall Height19 ft
Wheelbase17 ft
Dump Height36.83 ft
Dump Ground Clearance4.21 ft
Dump
Load Capacity - Struck96 yd3
Load Capacity - Heaped119 yd3
Rated Payload300,000 lb
Dump Angle49 degrees
Operational
Fuel Capacity500 gal
Tire Size33.00-R51 tires
Cooling System Fluid Capacity100 gal
Engine Oil Capacity24 gal
Diff And Final Drive Fluid Capacity115 gal
Steering System Fluid Capacity31 gal
Brake/Hoist System Fluid Capacity89 gal
Hydraulic System Fluid Capacity169.4 gal
Operating Voltage24 V
Alternator Supplied Amperage75 amps
Approximate Weights Flat Floor
Standard Liner4,400 lb
Additional specifications
Overall Length36.25 ft
Ground Clearance3.24 ft
Raise Time15.2 sec
Lower Time15.9 sec
Brake Surface - Front9,497 in2
Brake Surface - Rear13,908 in2
StandardsSAE J1473 OCT90 ISO 3450-1985
Top Speed - Loaded34 mph
Steer Angle36 degrees
Turning Diameter - Front90.2 ft
Front Axle - Empty47 %
Front Axle - Loaded33 %
Rear Axle - Empty53 %
Rear Axle - Loaded67 %
Struck74 yd3
Heaped (SAE 2:1)102 yd3
Body46,865 lb
Chassis164,134 lb
Gross Weight - Empty211,035 lb

Source

785D
SpecificationSource figure
Operating Specifications
Machine Clearance Turning Diameter108.9 ft
Minimum Target Payload288,000 lb
Maximum Target Payload314,000 lb
Target Payload - Dual Slope*292,000 lb
Engine
Gross Power1,450 hp
Net Power1,348 hp
Displacement3,574 cu in
Engine Model3512C HD
Torque Rise23 %
Bore6.7 in
Stroke8.4 in
Net Power - Cat1,348 hp
Net Power - ISO 92491,348 hp
Net Power - SAE J13491,348 hp
Net Power - 80/1269/Eec1,348 hp
Gross Power - SAE J19951,450 hp
Power Measured @1,750 rpm
Rated Power1,450 hp
Weight Distributions Approximate
Front Axle - Loaded - Target33 %
Rear Axle - Loaded - Target67 %
Front Axle - Empty*45-46%
Rear Axle - Empty*54-55%
Transmission and speeds
Number Of Gears - Forward6
Max Speed34 mph
Number Of Gears - Reverse1
Reverse6.8 mph
Forward - 17.5 mph
Forward - 210.2 mph
Forward - 313.8 mph
Forward - 418.6 mph
Forward - 525.2 mph
Forward - 634 mph
Sound
Sound StandardsANSI/SAE J1166 MAY90 SAE J88 APR95
Final Drives
Planetary Ratio10.83:1
Differential Ratio2.10:1
Total Reduction Ratio22.75:1
Service Refill Capacities
Cooling System100 gal
Differential - Final Drives115 gal
Steering Tank24 gal
Steering System - Including Tank31 gal
Brake Hoist System - Includes Tank169 gal
Crankcase54 gal
Brake/Hoist Hydraulic Tank89 gal
Torque Converter/Transmission System - Including Sump65.6 gal
Fuel Tank - Standard500 gal
Body Hoists
Pump Flow - High Idle198 gpm
Relief Valve Setting - Raise2,500 psi
Body Raise Time - High Idle15.2 s
Body Lower Time - Float16.2 s
Body Power Down - High Idle15.9 s
Body Lower Time - High Idle15.9 s
Suspension
Effective Cylinder Stroke - Front12.1 in
Effective Cylinder Stroke - Rear6.5 in
Tires
Standard Tires33.00-R51 (E3 & E4)
Steering
Steering StandardsSAE J1511 OCT90 ISO 5010:1992
ROPS
ROPS StandardsSAE J1040 APR88 ISO 3471:1994
Weights Approximate
Gross Machine Operating Weight (Gmw)550,000 lb
Body Weight Range20 831 - 30 623 kg 45,924 - 67,512 lb
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
Weights
Empty Weight259,257 lb
Loaded Weight550,000 lb
Weight Distribution Front - Empty46 %
Weight Distribution Rear - Empty55 %
Weight Distribution Front - Loaded33 %
Weight Distribution Rear - Loaded67 %
Dimensions and weight
Overall Width21.79 ft
Overall Height16.81 ft
Wheelbase17 ft
Dump Height38.75 ft
Dump Ground Clearance3.94 ft
Dump
Load Capacity - Heaped102 yd3
Rated Payload300,000 lb
Operational
Fuel Capacity500.1 gal
Tire Size33.00-51 50PR (E3 & E4)
Cooling System Fluid Capacity100.2 gal
Engine Oil Capacity53.9 gal
Diff And Final Drive Fluid Capacity115.2 gal
Steering System Fluid Capacity31 gal
Brake/Hoist System Fluid Capacity169.4 gal
Hydraulic System Fluid Capacity89.1 gal
Additional specifications
Overall Length37.89 ft
Ground Clearance3.24 ft
Raise Time15.2 sec
Lower Time15.9 sec
Brake Surface - Front9,497 in2
Brake Surface - Rear13,908 in2
StandardsSAE J1473 OCT90 ISO 3450-1985
Top Speed - Loaded34 mph
Steer Angle36 degrees
Turning Diameter - Front97.7 ft
Body Weight49,150 lb
Heaped (SAE 2:1)102 yd3

Source

Compare Cat 785C, 785D
Dimensions and weight
Specification785C785D
Overall Length36.25 ft37.89 ft
Overall Width20.6 ft21.79 ft
Overall Height19 ft16.81 ft
Wheelbase17 ft17 ft
Ground Clearance3.24 ft3.24 ft
Dump Height36.83 ft38.75 ft
Dump Ground Clearance4.21 ft3.94 ft
Dump
Specification785C785D
Load Capacity - Heaped119 yd3102 yd3
Rated Payload300,000 lb300,000 lb
Lower Time15.9 sec15.9 sec
Raise Time15.2 sec15.2 sec
Engine
Specification785C785D
Engine Model3512B-EUI3512C HD
Gross Power1,451 hp1,450 hp
Net Power1,348 hp1,348 hp
Power Measured @1,750 rpm1,750 rpm
Displacement3,158 cu in3,574 cu in
Torque Rise23 %23 %
Bore6.7 in6.7 in
Stroke7.5 in8.4 in
Net Power - Cat1,348 hp1,348 hp
Net Power - ISO 92491,348 hp1,348 hp
Net Power - SAE J13491,348 hp1,348 hp
Net Power - 80/1269/Eec1,348 hp1,348 hp
Gross Power - SAE J19951,450 hp1,450 hp
Operational
Specification785C785D
Fuel Capacity500 gal500.1 gal
Cooling System Fluid Capacity100 gal100.2 gal
Engine Oil Capacity24 gal53.9 gal
Diff And Final Drive Fluid Capacity115 gal115.2 gal
Steering System Fluid Capacity31 gal31 gal
Brake/Hoist System Fluid Capacity89 gal169.4 gal
Hydraulic System Fluid Capacity169.4 gal89.1 gal
Tire Size33.00-R51 tires33.00-51 50PR (E3 & E4)
Transmission and speeds
Specification785C785D
Number Of Gears - Forward66
Number Of Gears - Reverse11
Max Speed34 mph34 mph
Reverse6.8 mph6.8 mph
Forward - 17.5 mph7.5 mph
Forward - 210.2 mph10.2 mph
Forward - 313.8 mph13.8 mph
Forward - 418.6 mph18.6 mph
Forward - 525.2 mph25.2 mph
Forward - 634 mph34 mph
Steering
Specification785C785D
Steering StandardsSAE J1511 OCT90 ISO 5010:1992SAE J1511 OCT90 ISO 5010:1992
Weights
Specification785C785D
Empty Weight225,200 lb259,257 lb
Loaded Weight550,000 lb550,000 lb
Weight Distribution Front - Empty47 %46 %
Weight Distribution Rear - Empty53 %55 %
Weight Distribution Front - Loaded33 %33 %
Weight Distribution Rear - Loaded67 %67 %
Tires
Specification785C785D
Standard Tires33.00-R51 (E4) 33.00-R51 (E3)33.00-R51 (E3 & E4)
Brakes
Specification785C785D
Brake Surface - Front9,497 in29,497 in2
Brake Surface - Rear13,908 in213,908 in2
StandardsSAE J1473 OCT90 ISO 3450-1985SAE J1473 OCT90 ISO 3450-1985
Body Hoists
Specification785C785D
Pump Flow - High Idle198 gpm198 gpm
Relief Valve Setting - Raise2,500 psi2,500 psi
Body Raise Time - High Idle15.2 s15.2 s
Body Lower Time - Float16.2 s16.2 s
Body Power Down - High Idle15.9 s15.9 s
Body Lower Time - High Idle15.9 s15.9 s
Final Drives
Specification785C785D
Planetary Ratio10.83:110.83:1
Differential Ratio2.10:12.10:1
Total Reduction Ratio22.75:122.75:1
Operating Specifications
Specification785C785D
Top Speed - Loaded34 mph34 mph
Steer Angle36 degrees36 degrees
Turning Diameter - Front90.2 ft97.7 ft
Machine Clearance Turning Diameter100.4 ft108.9 ft
Service Refill Capacities
Specification785C785D
Cooling System100 gal100 gal
Differential - Final Drives115 gal115 gal
Steering Tank24 gal24 gal
Steering System - Including Tank31 gal31 gal
Brake Hoist System - Includes Tank169 gal169 gal
Crankcase54 gal54 gal
Brake/Hoist Hydraulic Tank89 gal89 gal
Torque Converter/Transmission System - Including Sump65.6 gal65.6 gal
Fuel Tank - Standard500 gal500 gal
ROPS
Specification785C785D
ROPS StandardsSAE J1040 APR88 ISO 3471:1994SAE J1040 APR88 ISO 3471:1994
Sound
Specification785C785D
Sound StandardsANSI/SAE J1166 MAY90 SAE J88 APR95ANSI/SAE J1166 MAY90 SAE J88 APR95
Suspension
Specification785C785D
Effective Cylinder Stroke - Front12.1 in12.1 in
Effective Cylinder Stroke - Rear6.5 in6.5 in

More in Cat: 785, 170–771D, 785 Bare Chassis.