Machine models
Cat 785 Bare Chassis specifications
| Listing-entry count |
|---|
| 1 |
Short answer
Cat 785 Bare Chassis: rigid rock truck.
| Configuration | Documented field and quantity |
|---|---|
| 785 Bare Chassis |
|
| Specification | 785 Bare Chassis |
|---|---|
| LRC Bare Chassis Weight without Hoist | 184,582 lb |
| LRC Bare Chassis Weight with Hoist | 188,766 lb |
| LRC Gross Vehicle Weight (Target) without Hoist | 550,000 lb |
| LRC Gross Vehicle Weight (Target) with Hoist | 550,000 lb |
| HRC Bare Chassis Weight without Hoist | 187,068 lb |
| HRC Bare Chassis Weight with Hoist | 191,253 lb |
| HRC Gross Vehicle Weight (Target) without Hoist | 550,000 lb |
| HRC Gross Vehicle Weight (Target) with Hoist | 550,000 lb |
| Specification | 785 Bare Chassis |
|---|---|
| Tractor ROPS | 231,485 lb |
| Specification | 785 Bare Chassis |
|---|---|
| Nominal Water Tank Capacity | 30,000 gal (US) |
| Specification | 785 Bare Chassis |
|---|---|
| Engine Model | Cat® 3512E |
| Gross Power - SAE J1995 | 1,600 hp |
| Rated Net Power - SAE J1349 | 1,509 hp |
| Bore | 6.7 in / 3573 in³ |
| Stroke | 8.5 in |
| Displacement | 3,573 in³ |
| Rated Engine Speed | 1650 r/min |
| Specification | 785 Bare Chassis |
|---|---|
| Forward - 1 | 7.5 mph |
| Forward - 2 | 10.2 mph |
| Forward - 3 | 13.8 mph |
| Forward - 4 | 18.6 mph |
| Forward - 5 | 25.2 mph |
| Forward - 6 | 34 mph |
| Reverse | 6.8 mph |
| Specification | 785 Bare Chassis |
|---|---|
| Brake Surface - Front | 9,487 in² / 61270 cm² |
| Brake Surface - Rear | 13,908 in² / 89728 cm² |
| Specification | 785 Bare Chassis |
|---|---|
| Fuel Tank Capacity | 410 gal (US) |
| Cooling System | 100 gal (US) |
| Crankcase | 54 gal (US) |
| Differential - Final Drives | 139 gal (US) |
| Steering System - Including Tank | 45 gal (US) |
| Brake/Hoist Hydraulic Tank | 135 gal (US) |
| Brake Hoist System | 160 gal (US) |
| Torque Converter - Transmission System | 46 gal (US) |
| Specification | 785 Bare Chassis |
|---|---|
| Steering Standards | ISO 5010:2007 |
| Steer Angle | 36 ° |
| Turning Diameter | 97.75 in |
| Figure | 785 Bare Chassis |
|---|---|
| Fuel tank per engine horsepower | 0.26 gal |
| Equipment group | rigid rock truck |
|---|
| Base version | 785 | 785 Bare Chassis | 789C |
|---|---|---|---|
| Engine power | 1,600 hp | 1,600 hp | 1,770 hp |
| Weight | 789C: 299,101 lb | ||
| Fuel capacity | 410 gal (US) | 410 gal (US) | 851 gal |
| Wheelbase | 785: 17 ft; 789C: 18.68 ft | ||
| Rated payload | 789C: 390,000 lb | ||
| Forum index | Equipment class queried | Names in the search | Matching titles |
|---|---|---|---|
| Heavy Equipment Forums | rigid rock truck | Cat and the 785 line that the 785 Bare Chassis 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 instead | 4 |
- CAT 785g (Heavy Equipment Forums, 2016-10-06)
- CAT 785 Engine Retrofit To Eui (Heavy Equipment Forums, 2016-05-07)
- CAT 785b VIMS Error (Heavy Equipment Forums, 2014-06-27)
- CAT 785c Air Fuel Ratio (Heavy Equipment Forums, 2013-07-06)
| Date | Listing index | Equipment class | Names queried | Result |
|---|---|---|---|---|
| 2026-09-25 | MachineryTrader (machinerytrader.com) | rigid rock truck | 785 Bare Chassis | No matching offers in this snapshot |
| Date | Database | Names queried | Result |
|---|---|---|---|
| 2026-09-25 | U.S. Consumer Product Safety Commission | Cat; 785 Bare Chassis | No matching recall in the stated search |
| Evidence class | Document, classification and recorded date |
|---|---|
| Manufacturer |
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| Forum threads |
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| Federal agency data |
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| Observation field | Recorded value |
|---|---|
| Title count | 4 |
| Forum indexes | Heavy Equipment Forums |
| Search wording | the 785 Bare Chassis rigid rock truck |
| Latest title quoted by the reference | CAT 785g |
Cat 785 Bare Chassis: Configuration records
785 Bare Chassis
| Specification | Source figure |
|---|---|
| Operating Specifications | |
| Nominal Water Tank Capacity | 30,000 gal (US) |
| Engine | |
| Displacement | 3,573 in³ |
| Engine Model | Cat® 3512E |
| Bore | 6.7 in / 3573 in³ |
| Stroke | 8.5 in |
| Gross Power - SAE J1995 | 1,600 hp |
| Rated Engine Speed | 1650 r/min |
| Rated Net Power - SAE J1349 | 1,509 hp |
| Transmission and speeds | |
| Reverse | 6.8 mph |
| Forward - 1 | 7.5 mph |
| Forward - 2 | 10.2 mph |
| Forward - 3 | 13.8 mph |
| Forward - 4 | 18.6 mph |
| Forward - 5 | 25.2 mph |
| Forward - 6 | 34 mph |
| Service Refill Capacities | |
| Cooling System | 100 gal (US) |
| Differential - Final Drives | 139 gal (US) |
| Steering System - Including Tank | 45 gal (US) |
| Crankcase | 54 gal (US) |
| Brake/Hoist Hydraulic Tank | 135 gal (US) |
| Brake Hoist System | 160 gal (US) |
| Torque Converter - Transmission System | 46 gal (US) |
| Fuel Tank Capacity | 410 gal (US) |
| Steering | |
| Steering Standards | ISO 5010:2007 |
| Turning Diameter | 97.75 in |
| ROPS | |
| Tractor ROPS | 231,485 lb |
| Weights | |
| LRC Bare Chassis Weight without Hoist | 184,582 lb |
| LRC Bare Chassis Weight with Hoist | 188,766 lb |
| LRC Gross Vehicle Weight (Target) without Hoist | 550,000 lb |
| LRC Gross Vehicle Weight (Target) with Hoist | 550,000 lb |
| HRC Bare Chassis Weight without Hoist | 187,068 lb |
| HRC Bare Chassis Weight with Hoist | 191,253 lb |
| HRC Gross Vehicle Weight (Target) without Hoist | 550,000 lb |
| HRC Gross Vehicle Weight (Target) with Hoist | 550,000 lb |
| Additional specifications | |
| Steer Angle | 36 ° |
| Brake Surface - Front | 9,487 in² / 61270 cm² |
| Brake Surface - Rear | 13,908 in² / 89728 cm² |