Specification sheetIssued 4 November 2026
Cat · rigid dump truck
Cat 785
Current Cat 785 (build 08, global; 3512E fuel-optimized, Tier 4 Final optional), 33.00 R51 tyres; dimensions with the MSD II body, capacities with the HP body.
USAGlobal
- Payload (nominal)
- 158 tons
- power
- 1,509 hp
- machine operating weight
- 550,000 lb
- Body capacity (SAE 2:1 heaped)
- 144 yd³
- Overall length
- 39 ft 3 in
- Overall width
- 24 ft 10 in
- Overall height (canopy)
- 19 ft 10 in
- Wheelbase
- 17 ft 0 in
- Loading height (empty)
- 17 ft 5 in
- Dump height (body raised)
- 39 ft 6 in
- Ground clearance
- 3 ft 4 in
- Height to top of ROPS
- 17 ft 1 in
- Overall body length
- 39 ft 4 in
- Inside body length
- 27 ft 3 in
- Rear axle to tail
- 12 ft 7 in
- Dump clearance
- 3 ft 8 in
- Rear sidewall height
- 2 ft 10 in
- Inside body depth (maximum)
- 9 ft 2 in
- Operating width
- 24 ft 9 in
- Centre line front tyre width
- 15 ft 11 in
- Engine guard clearance
- 3 ft 5 in
- Outside body width
- 22 ft 0 in
- Inside body width
- 19 ft 9 in
- Rear axle clearance
- 3 ft 3 in
- Centre line rear dual tyre width
- 14 ft 1 in
- Overall tyre width
- 20 ft 7 in
4
16
19
5
9
12
7
1
2
3
6
8
10
11
13
14
15
17
18
20
21
22
Weight
- Payload (nominal)
- 158 tons
- Gross machine operating weight
- 550,000 lb
- Chassis weight (33.00 R51 tyres; with full fuel and fluids)
- 187,736 lb
- Body weight (Unlined HP body)
- 46,136 lb
- Weight distribution, empty (front/rear)
- 48% / 52%
- Weight distribution, loaded (front/rear)
- 33% / 67%
Body
- Body capacity (SAE 2:1 heaped) (HP body, 100% fill factor)
- 144 yd³
- Body capacity (struck) (HP body)
- 110 yd³
- Hoist pump flow (High idle)
- 223 gal/min
- Body raise time (High idle; lower (float) 15.6 s)
- 15.0 s
Engine
- Engine model
- Cat 3512E
- Emissions
- Fuel optimized; U.S. EPA Tier 4 Final / EU Stage V available for applicable markets
- Gross power (SAE J1995:2014, at 1,650 rpm)
- 1,600 hp
- Net power (SAE J1349:2011)
- 1,509 hp
- Displacement
- 3,573 in³
- Bore x stroke
- 170 mm x 215 mm
Performance
- Top speed (Loaded, 6th gear, 33.00 R51 tyres)
- 35.6 mph
- Turning diameter (ISO 7457:1997)
- 96.6 ft
- Steering angle
- 25°
Transmission
- Transmission
- 6F/1R
- Total reduction ratio (Planetary 10.83:1)
- 22.75:1
Tyres
- Tyres
- 33.00 R51 (standard for the published speeds); 36.00 R51 optional
Service capacities
- Fuel tank
- 410 gal
- DEF tank
- 36 gal
- Cooling system
- 126 gal
- Engine oil, with filter (Crankcase)
- 54 gal
- Differential and final drives
- 139 gal
- Steering system, with tank
- 31 gal
- Brake/hoist system, with tank
- 143 gal
- Torque converter/transmission system (Includes sump)
- 46 gal
Service intervals
- Hydraulic filters
- 1,000 hours
- Coolant
- 12,000 hours