Machine models

Cat 794 AC, 796 AC, and 798 AC specifications

Entries in this reference
Listing-entry count
3

Short answer

Cat 794 AC, 796 AC, and 798 AC: rigid rock trucks.

Selected configuration figures
Configuration	Documented field and quantity
794 AC	Net Power - SAE J1349 3,405 hp Pump Flow - High Idle (HAA at 1,800 rpm) 221 gpm
796 AC	Net Power - SAE J1349 3,405 hp Pump Flow - High Idle 257.3 gpm
798 AC	Net Power - SAE J1349 3,405 hp Pump Flow - High Idle 257.3 gpm

794 AC, 796 AC, and 798 AC specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Cat	794 AC, 796 AC, and 798 AC	3	794 AC, 796 AC, and 798 AC

Weights Approximate
Specification	794 AC	796 AC	798 AC
Nominal Rated Payload	327 ton (US)	360 ton (US)	410 ton (US)
Rated Gross Machine Weight	1,150,000 lb	1,270,000 lb	1,375,000 lb
Chassis Weight	426,237 lb	448,415 lb	453,826 lb

Specification	794 AC
Body Weight	64,346 lb

Specification	796 AC	798 AC
Body Weight Range	38 833 – 42 907 kg (85,611 – 94,594 lb)	38 833 - 43 275 kg (85,611 - 95,406 lb)

Engine
Specification	794 AC	796 AC	798 AC
Gross Power - SAE J1995	3,500 hp	3,500 hp	3,500 hp
Engine Model	Cat® C175-16	Cat® C175-16	Cat® C175-16
Rated Speed	1800 r/min	1800 r/min	1800 r/min
Net Power - SAE J1349	3,405 hp	3,405 hp	3,405 hp
Emissions Rating	Fuel Optimized	Fuel Optimized	Fuel Optimized
Bore	6.9 in	6.9 in	6.9 in
Stroke	8.7 in	8.7 in	8.7 in
Displacement	5,187 in³	5,187 in³	5,187 in³

Specification	794 AC
Standard Gross Power - SAE J1995	3,500 hp
Optional Gross Power - SAE J1995 (Option 2)	2,750 hp

Specification	794 AC	798 AC
Optional Gross Power - SAE J1995	3,100 hp	3,100 hp

Final Drives
Specification	794 AC
Total Reduction Ratio	35:01:00

Tires
Specification	794 AC	796 AC	798 AC
Standard Tires	53/80 R63	59/80 R63	59/80 R63
Rims	36" x 63"	44" x 63"	44" x 63" Rims

AC Drive System
Specification	794 AC	796 AC	798 AC
Top Speed - Loaded	37 mph	40 mph	40 mph
Generator/Alternator	Brushless, engine mounted, dual bearing	Cat brushless, engine mounted, dual bearing	Brushless, engine mounted, dual bearing
Controls	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration	Cat IGBT Inverter Technology, air cooled, pressurized cabinet with filtration	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor	High-torque AC induction, rear axle mounted	Cat AC induction, rear axle mounted	Cat high-torque AC induction, rear axle mounted
Cooling System	Variable speed, hydraulically driven cooling system	Cat variable speed, hydraulically driven cooling system	Cat variable speed, hydraulically driven cooling system

Specification	796 AC	798 AC
Total Reduction Ratio	35:01:00	35:01:00

Braking System
Specification	794 AC	796 AC	798 AC
Service Brakes	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area	20,378 in² / 131473 cm²	20,378 in² / 131473 cm²	22,642 in² / 146081 cm²
Rear - Wet Disc Brake Surface Area	30,750 in² / 198388 cm²	30,750 in² / 198388 cm²	32,730 in² / 211163 cm²
Standards	ISO 3450:2011	Service and Secondary: ISO 3450:2011	Service and Secondary: ISO 3450:2011
Load Brake	Rear service brakes	Rear service brakes	Rear service brakes
Dynamic Retarding Power - Continuous	5,480 hp	5,480 hp	5,480 hp

Specification	794 AC	796 AC
Parking Brake	Four-corner, Multi-disc, Spring applied, Hydraulically Released	Four-corner, Multi-disc, Spring Applied, Hydraulically Released

Specification	798 AC
Electric Retarding	Radial Grid Design
Parking Brakes	Four-corner, Multi-disc, Spring Applied, Hydraulically Released

Weight Distributions Approximate
Specification	794 AC	796 AC	798 AC
Front Axle - Empty	49 %	47 %	47 %
Rear Axle - Empty	51 %	53 %	53 %
Front Axle - Loaded	33 %	33 %	33 %
Rear Axle - Loaded	67 %	67 %	67 %

Body Hoists
Specification	794 AC
Pump Flow - High Idle (HAA at 1,800 rpm)	221 gpm
Pump Flow - High Idle (LAA at 1,960 rpm)	240 gpm
High Idle Body Lower Time - Float	20 s
Total Cycle Time	44 s

Specification	794 AC	796 AC	798 AC
Relief Valve Setting - Raise	3,029 psi	3,029 psi	3,029 psi
Body Raise Time - High Idle	24 s	21 s	21 s

Specification	796 AC	798 AC
Type	Twin, two-stage hydraulic cylinders with snubbing valve	Twin, two-stage hydraulic cylinders with snubbing valve
Pump Flow - High Idle	257.3 gpm	257.3 gpm
Body Lower Time - Float	22 s	22 s
Body Power Down- High Idle	17.5 s	17.5 s

Capacity HE Body 100% fill factor
Specification	794 AC	796 AC	798 AC
Struck	108-133 m³ (142-175 yd³)	97-153 m³ (127-200 yd³)	129-200 m³ (168-261 yd³)
Heaped (SAE 2:1)	180-222 m³ (236-290 yd³)	186-237 m³ (243-310 yd³)	218-276 m³ (285-361 yd³)

Specification	794 AC
Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate	0.63 in
Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate	0.35 in
Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate	0.31 in
Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate	0.2 in

Service Refill Capacities
Specification	794 AC	796 AC	798 AC
Fuel Tank	1,300 gal (US)	1,300 gal (US)	1,300 gal (US)
Cooling System	211 gal (US)	211 gal (US)	211 gal (US)
Crankcase	82 gal (US)	82 gal (US)	82 gal (US)
Final Drive - Each	67 gal (US)	67 gal (US)	67 gal (US)
Hydraulic Tank	296 gal (US)	296 gal (US)	296 gal (US)
Hydraulic System - Including Tank	385 gal (US)	385 gal (US)	385 gal (US)
Diesel Exhaust Fluid Tank	100 gal (US)	100 gal (US)	100 gal (US)

Specification	796 AC	798 AC
Fuel Tank (Tier 4)	1,200 gal (US)	1,200 gal (US)
Grease Tank	90 lb	90 lb

Specification	796 AC
Front Wheels - Each	7 gal (US)

Dimensions (Approximate)
Specification	794 AC	796 AC	798 AC
Height - Top of ROPS	22.25 ft	22.05 ft	22.1 ft
Overall Length	50.75 ft	51.44 ft	51.44 ft
Wheel Base	21.83 ft	21.9 ft	21.9 ft
Rear Axle - Tail	15.5 ft	16.07 ft	16.07 ft
Loading Height - Empty	22.92 ft	23.85 ft	25.54 ft
Overall Height - Body Raised	48.42 ft	48.85 ft	48.85 ft
Centerline Front Tire Width	23 ft	23.06 ft	23.06 ft
Inside Body Width	28.08 ft	29.44 ft	29.44 ft
Centerline of Rear Dual Tire Width	18.75 ft	19.5 ft	19.5 ft

Specification	794 AC
Ground Clearance	2.67 ft
Dump Clearance	3 ft
Front Axle Clearance	3.17 ft
Canopy Width (without optional rock deflectors)	29.75 ft
Outside Body Width	29.75 ft
Front Canopy Height	26.33 ft
Rear Axle - Clearance	3.08 ft
Overall Tire Width	28.67 ft
Overall Canopy Width	31.5 ft

Specification	796 AC	798 AC
Dump Clearance - Empty	5.72 ft	5.72 ft
Front Axle Clearance - Loaded	2.81 ft	2.81 ft
Overall Canopy Width (with rock deflectors)	33.15 ft	33.15 ft
Outside Body/Canopy Width (without rock deflectors)	31.62 ft	31.62 ft
Front Canopy Height - Empty	26.01 ft	26.01 ft
Rear Axle Clearance - Loaded	2.8 ft	2.8 ft
Overall Tire Width - Empty	30.27 ft	30.27 ft

Specification	798 AC
Overall Length (High Altitude only)	51.87 ft

Cab
Specification	794 AC	796 AC	798 AC
ROPS Standards (1)	Rollover Protective Structure (ROPS) meets ISO 3471:2008 criteria for operator and ISO 13459:2012 for trainer	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer
FOPS Standards	Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II for operator and ISO 13459:2012 Level II for trainer	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer

Specification	796 AC	798 AC
Air Conditioning	HFC - 134A refrigerant: 21,600 Btu/h	HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster	24600 Btu/h	24600 Btu/h

Sound
Specification	794 AC
Sound Standards (1)	The operator sound pressure level measured according to work cycle procedures specified in ISO 6394 and 6396 is 75 dB(A) for cab offered by Caterpillar when properly installed, maintained, and tested with doors and windows closed
Sound Standards (2)	Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment

Specification	796 AC	798 AC
Sound Standards	The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008	The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008

Steering
Specification	794 AC	796 AC	798 AC
Steering Standards	ISO 5010:2019	ISO 5010:2019	ISO 5010:2019
Steer Angle	39 °	39 °	39 °

Specification	796 AC	798 AC
Turning Diameter - Front	106.3 ft	106.3 ft

Suspension
Specification	796 AC	798 AC
Type	Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments	Self-contained nitrogen/oil cylinders, pin-to-pin mounting, top & bottom double shear clevis attachments
Effective Cylinder Stroke - Front	4 in	10 in
Effective Cylinder Stroke - Rear	2 in	5 in

Specification	796 AC
Rear axle - Oscillation	+/- 5.32 degrees

Service Refill Capacities High Altitude Only
Specification	798 AC
Fuel Tank	2,000 gal (US)
Cooling System	273 gal (US)
Crankcase	124 gal (US)
Hydraulic Tank	273 gal (US)
Hydraulic System (includes tank)	342 gal (US)

Engine High Altitude Only
Specification	798 AC
Engine Model	Cat® C175-20
Gross Power SAE J1995:2014	4,150 hp
Net Power - SAE J1349:2011	4,000 hp
Rated Speed	1750 r/min
Displacement	6,469 in³
Note 1	Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator
Note 2	Additional fuel optimized selectable power rating: 2983 kW

Variants — Source comparison annotation
Source guide	Differing-field count reported
794 AC, 796 AC, and 798 AC	94

Ratios
Figure	794 AC	796 AC	798 AC
Fuel tank per engine horsepower	0.37 gal	0.37 gal	0.57 gal

History and service record of 794 AC, 796 AC, and 798 AC

Introduction and field record. The 794 AC electric drive truck debuted at MINExpo 2016. By September 2021 Caterpillar reported the global fleet had logged over 780,000 hours at about 90 percent physical availability, and the 794 AC became the first electric-drive model to join the Cat MineStar Command autonomous fleet, alongside the 789D, 793D, 793F and 797F. Autonomous Cat 794 AC, Caterpillar press release, September 2021.
Launch. The AC powertrain of the Cat 796 AC and 798 AC electric-drive mining trucks draws on the 794 AC and 795 AC, which have been operating in the field for about 5 million hours. Caterpillar 796 AC, 798 AC mining trucks, Construction Equipment; 798 AC, Caterpillar.
794 AC. The 794 AC carries a 320-ton (327-ton payload) electric drive that Caterpillar designs, integrates and supports itself. 794 AC mining truck, Caterpillar.

794 AC, 796 AC, and 798 AC: dated market and recall observations — Dated listing search
Date	Listing index	Equipment class	Names queried	Result
2026-09-25	MachineryTrader (machinerytrader.com)	rigid rock truck	794 AC, 796 AC, 798 AC	No matching offers in this snapshot

Dated CPSC search
Date	Database	Names queried	Result
2026-09-25	U.S. Consumer Product Safety Commission	Cat; 794 AC, 796 AC, 798 AC	No matching recall in the stated search

Sources for this page
Evidence class	Document, classification and recorded date
Manufacturer	Manufacturer: Cat 794 AC — Caterpillar Inc.. Observed 2026-09-24.
Manufacturer	Manufacturer: Cat 796 AC — Caterpillar Inc.. Observed 2026-09-24.
Manufacturer	Manufacturer: Cat 798 AC — Caterpillar Inc.. Observed 2026-09-24.
Published history	Published history Source: Autonomous Cat 794 AC, Caterpillar press release, September 2021 — Caterpillar. Observed 2026-09-25.
Published history	Published history Source: Caterpillar 796 AC, 798 AC mining trucks, Construction Equipment — Construction Equipment. Observed 2026-09-25.
Published history	Published history Source: 798 AC, Caterpillar — Caterpillar. Observed 2026-09-25.
Published history	Published history Source: 794 AC mining truck, Caterpillar — Caterpillar. Observed 2026-09-25.
Federal agency data	Federal agency data: Recall database search for Cat — U.S. Consumer Product Safety Commission. Observed 2026-09-24.

Cat 794 AC, 796 AC, and 798 AC: Configuration records

794 AC

Specification	Source figure
Weights Approximate
Chassis Weight	426,237 lb
Nominal Rated Payload	327 ton (US)
Rated Gross Machine Weight	1,150,000 lb
Body Weight	64,346 lb
Engine
Net Power - SAE J1349	3,405 hp
Gross Power - SAE J1995	3,500 hp
Standard Gross Power - SAE J1995	3,500 hp
Optional Gross Power - SAE J1995	3,100 hp
Optional Gross Power - SAE J1995 (Option 2)	2,750 hp
Emissions Rating	Fuel Optimized
Bore	6.9 in
Stroke	8.7 in
Tires
Standard Tires	53/80 R63
Rims	36" x 63"
AC Drive System
Generator/Alternator	Brushless, engine mounted, dual bearing
Controls	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor	High-torque AC induction, rear axle mounted
Braking System
Service Brakes	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area	20,378 in² / 131473 cm²
Rear - Wet Disc Brake Surface Area	30,750 in² / 198388 cm²
Parking Brake	Four-corner, Multi-disc, Spring applied, Hydraulically Released
Load Brake	Rear service brakes
Dynamic Retarding Power - Continuous	5,480 hp
Body Hoists
Relief Valve Setting - Raise	3,029 psi
Body Raise Time - High Idle	24 s
Pump Flow - High Idle (HAA at 1,800 rpm)	221 gpm
Pump Flow - High Idle (LAA at 1,960 rpm)	240 gpm
High Idle Body Lower Time - Float	20 s
Total Cycle Time	44 s
Capacity HE Body 100% fill factor
Heaped (SAE 2:1)	180-222 m³ (236-290 yd³)
Dump Body Plate Thickness Varies Depending on Body Selection - Floor Plate	0.63 in
Dump Body Plate Thickness Varies Depending on Body Selection - Front Plate	0.35 in
Dump Body Plate Thickness Varies Depending on Body Selection - Side Plate	0.31 in
Dump Body Plate Thickness Varies Depending on Body Selection - Canopy Plate	0.2 in
Service Refill Capacities
Final Drive - Each	67 gal (US)
Hydraulic System - Including Tank	385 gal (US)
Diesel Exhaust Fluid Tank	100 gal (US)
Dimensions (Approximate)
Front Axle Clearance	3.17 ft
Canopy Width (without optional rock deflectors)	29.75 ft
Front Canopy Height	26.33 ft
Cab
ROPS Standards (1)	Rollover Protective Structure (ROPS) meets ISO 3471:2008 criteria for operator and ISO 13459:2012 for trainer
FOPS Standards	Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II for operator and ISO 13459:2012 Level II for trainer
Sound
Sound Standards (1)	The operator sound pressure level measured according to work cycle procedures specified in ISO 6394 and 6396 is 75 dB(A) for cab offered by Caterpillar when properly installed, maintained, and tested with doors and windows closed
Sound Standards (2)	Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in a noisy environment
Steering
Steering Standards	ISO 5010:2019
Steer Angle	39 °
Additional specifications
Engine Model	Cat® C175-16
Displacement	5,187 in³
Rated Speed	1800 r/min
Total Reduction Ratio	35:01:00
Cooling System	211 gal (US)
Crankcase	82 gal (US)
Fuel Tank	1,300 gal (US)
Hydraulic Tank	296 gal (US)
Front Axle - Empty	49 %
Rear Axle - Empty	51 %
Front Axle - Loaded	33 %
Rear Axle - Loaded	67 %
Top Speed - Loaded	37 mph
Standards	ISO 3450:2011
Struck	108-133 m³ (142-175 yd³)
Height - Top of ROPS	22.25 ft
Overall Length	50.75 ft
Wheel Base	21.83 ft
Rear Axle - Tail	15.5 ft
Ground Clearance	2.67 ft
Dump Clearance	3 ft
Loading Height - Empty	22.92 ft
Overall Height - Body Raised	48.42 ft
Centerline Front Tire Width	23 ft
Outside Body Width	29.75 ft
Inside Body Width	28.08 ft
Rear Axle - Clearance	3.08 ft
Centerline of Rear Dual Tire Width	18.75 ft
Overall Tire Width	28.67 ft
Overall Canopy Width	31.5 ft

Source

796 AC

Specification	Source figure
Weights Approximate
Chassis Weight	448,415 lb
Nominal Rated Payload	360 ton (US)
Rated Gross Machine Weight	1,270,000 lb
Body Weight Range	38 833 – 42 907 kg (85,611 – 94,594 lb)
Engine
Net Power - SAE J1349	3,405 hp
Gross Power - SAE J1995	3,500 hp
Emissions Rating	Fuel Optimized
Bore	6.9 in
Stroke	8.7 in
Tires
Standard Tires	59/80 R63
Rims	44" x 63"
AC Drive System
Generator/Alternator	Cat brushless, engine mounted, dual bearing
Controls	Cat IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor	Cat AC induction, rear axle mounted
Braking System
Service Brakes	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area	20,378 in² / 131473 cm²
Rear - Wet Disc Brake Surface Area	30,750 in² / 198388 cm²
Parking Brake	Four-corner, Multi-disc, Spring Applied, Hydraulically Released
Load Brake	Rear service brakes
Dynamic Retarding Power - Continuous	5,480 hp
Body Hoists
Pump Flow - High Idle	257.3 gpm
Relief Valve Setting - Raise	3,029 psi
Body Raise Time - High Idle	21 s
Body Lower Time - Float	22 s
Body Power Down- High Idle	17.5 s
Capacity HE Body 100% fill factor
Heaped (SAE 2:1)	186-237 m³ (243-310 yd³)
Service Refill Capacities
Final Drive - Each	67 gal (US)
Hydraulic System - Including Tank	385 gal (US)
Diesel Exhaust Fluid Tank	100 gal (US)
Fuel Tank (Tier 4)	1,200 gal (US)
Front Wheels - Each	7 gal (US)
Grease Tank	90 lb
Dimensions (Approximate)
Dump Clearance - Empty	5.72 ft
Front Axle Clearance - Loaded	2.81 ft
Overall Canopy Width (with rock deflectors)	33.15 ft
Outside Body/Canopy Width (without rock deflectors)	31.62 ft
Rear Axle Clearance - Loaded	2.8 ft
Overall Tire Width - Empty	30.27 ft
Cab
ROPS Standards (1)	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer
FOPS Standards	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer
Air Conditioning	HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster	24600 Btu/h
Sound
Sound Standards	The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008
Steering
Steering Standards	ISO 5010:2019
Steer Angle	39 °
Turning Diameter - Front	106.3 ft
Suspension
Effective Cylinder Stroke - Front	4 in
Effective Cylinder Stroke - Rear	2 in
Rear axle - Oscillation	+/- 5.32 degrees
Additional specifications
Engine Model	Cat® C175-16
Displacement	5,187 in³
Rated Speed	1800 r/min
Type	Twin, two-stage hydraulic cylinders with snubbing valve
Cooling System	211 gal (US)
Crankcase	82 gal (US)
Fuel Tank	1,300 gal (US)
Hydraulic Tank	296 gal (US)
Front Axle - Empty	47 %
Rear Axle - Empty	53 %
Front Axle - Loaded	33 %
Rear Axle - Loaded	67 %
Top Speed - Loaded	40 mph
Total Reduction Ratio	35:01:00
Standards	Service and Secondary: ISO 3450:2011
Struck	97-153 m³ (127-200 yd³)
Height - Top of ROPS	22.05 ft
Overall Length	51.44 ft
Wheel Base	21.9 ft
Rear Axle - Tail	16.07 ft
Loading Height - Empty	23.85 ft
Overall Height - Body Raised	48.85 ft
Centerline Front Tire Width	23.06 ft
Inside Body Width	29.44 ft
Centerline of Rear Dual Tire Width	19.5 ft
Front Canopy Height - Empty	26.01 ft

Source

798 AC

Specification	Source figure
Weights Approximate
Chassis Weight	453,826 lb
Nominal Rated Payload	410 ton (US)
Rated Gross Machine Weight	1,375,000 lb
Body Weight Range	38 833 - 43 275 kg (85,611 - 95,406 lb)
Engine
Net Power - SAE J1349	3,405 hp
Gross Power - SAE J1995	3,500 hp
Optional Gross Power - SAE J1995	3,100 hp
Emissions Rating	Fuel Optimized
Bore	6.9 in
Stroke	8.7 in
Tires
Standard Tires	59/80 R63
Rims	44" x 63" Rims
AC Drive System
Generator/Alternator	Brushless, engine mounted, dual bearing
Controls	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor	Cat high-torque AC induction, rear axle mounted
Braking System
Service Brakes	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area	22,642 in² / 146081 cm²
Rear - Wet Disc Brake Surface Area	32,730 in² / 211163 cm²
Load Brake	Rear service brakes
Dynamic Retarding Power - Continuous	5,480 hp
Electric Retarding	Radial Grid Design
Parking Brakes	Four-corner, Multi-disc, Spring Applied, Hydraulically Released
Body Hoists
Pump Flow - High Idle	257.3 gpm
Relief Valve Setting - Raise	3,029 psi
Body Raise Time - High Idle	21 s
Body Lower Time - Float	22 s
Body Power Down- High Idle	17.5 s
Capacity HE Body 100% fill factor
Heaped (SAE 2:1)	218-276 m³ (285-361 yd³)
Service Refill Capacities
Final Drive - Each	67 gal (US)
Hydraulic System - Including Tank	385 gal (US)
Diesel Exhaust Fluid Tank	100 gal (US)
Fuel Tank (Tier 4)	1,200 gal (US)
Grease Tank	90 lb
Dimensions (Approximate)
Dump Clearance - Empty	5.72 ft
Front Axle Clearance - Loaded	2.81 ft
Overall Canopy Width (with rock deflectors)	33.15 ft
Outside Body/Canopy Width (without rock deflectors)	31.62 ft
Rear Axle Clearance - Loaded	2.8 ft
Overall Tire Width - Empty	30.27 ft
Overall Length (High Altitude only)	51.87 ft
Cab
ROPS Standards (1)	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer
FOPS Standards	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer
Air Conditioning	HFC - 134A refrigerant: 21,600 Btu/h
Heater / Defroster	24600 Btu/h
Sound
Sound Standards	The operator sound pressure level, 75 dB(A), measured according to ISO 6394:2008 and ISO 6396:2008
Steering
Steering Standards	ISO 5010:2019
Steer Angle	39 °
Turning Diameter - Front	106.3 ft
Suspension
Effective Cylinder Stroke - Front	10 in
Effective Cylinder Stroke - Rear	5 in
Service Refill Capacities High Altitude Only
Hydraulic System (includes tank)	342 gal (US)
Engine High Altitude Only
Gross Power SAE J1995:2014	4,150 hp
Net Power - SAE J1349:2011	4,000 hp
Note 1	Net Power advertised is the power available at the flywheel when the engine is equipped with air intake system, exhaust system, and alternator
Note 2	Additional fuel optimized selectable power rating: 2983 kW
Additional specifications
Engine Model	Cat® C175-16
Displacement	5,187 in³
Rated Speed	1800 r/min
Type	Twin, two-stage hydraulic cylinders with snubbing valve
Cooling System	211 gal (US)
Crankcase	82 gal (US)
Fuel Tank	1,300 gal (US)
Hydraulic Tank	296 gal (US)
Front Axle - Empty	47 %
Rear Axle - Empty	53 %
Front Axle - Loaded	33 %
Rear Axle - Loaded	67 %
Top Speed - Loaded	40 mph
Total Reduction Ratio	35:01:00
Standards	Service and Secondary: ISO 3450:2011
Struck	129-200 m³ (168-261 yd³)
Height - Top of ROPS	22.1 ft
Overall Length	51.44 ft
Wheel Base	21.9 ft
Rear Axle - Tail	16.07 ft
Loading Height - Empty	25.54 ft
Overall Height - Body Raised	48.85 ft
Centerline Front Tire Width	23.06 ft
Inside Body Width	29.44 ft
Centerline of Rear Dual Tire Width	19.5 ft
Front Canopy Height - Empty	26.01 ft

Source

Compare Cat 794 AC, 796 AC, 798 AC

Weights Approximate
Specification	794 AC	796 AC	798 AC
Nominal Rated Payload	327 ton (US)	360 ton (US)	410 ton (US)
Rated Gross Machine Weight	1,150,000 lb	1,270,000 lb	1,375,000 lb
Chassis Weight	426,237 lb	448,415 lb	453,826 lb

Engine
Specification	794 AC	796 AC	798 AC
Gross Power - SAE J1995	3,500 hp	3,500 hp	3,500 hp
Engine Model	Cat® C175-16	Cat® C175-16	Cat® C175-16
Rated Speed	1800 r/min	1800 r/min	1800 r/min
Net Power - SAE J1349	3,405 hp	3,405 hp	3,405 hp
Emissions Rating	Fuel Optimized	Fuel Optimized	Fuel Optimized
Bore	6.9 in	6.9 in	6.9 in
Stroke	8.7 in	8.7 in	8.7 in
Displacement	5,187 in³	5,187 in³	5,187 in³

Tires
Specification	794 AC	796 AC	798 AC
Standard Tires	53/80 R63	59/80 R63	59/80 R63
Rims	36" x 63"	44" x 63"	44" x 63" Rims

AC Drive System
Specification	794 AC	796 AC	798 AC
Top Speed - Loaded	37 mph	40 mph	40 mph
Generator/Alternator	Brushless, engine mounted, dual bearing	Cat brushless, engine mounted, dual bearing	Brushless, engine mounted, dual bearing
Controls	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration	Cat IGBT Inverter Technology, air cooled, pressurized cabinet with filtration	IGBT Inverter Technology, air cooled, pressurized cabinet with filtration
Wheel Motor	High-torque AC induction, rear axle mounted	Cat AC induction, rear axle mounted	Cat high-torque AC induction, rear axle mounted

Braking System
Specification	794 AC	796 AC	798 AC
Service Brakes	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated	Four-Corner, Wet Disc, Oil Cooled, Hydraulically Actuated
Front Wet Disc Brake Surface Area	20,378 in² / 131473 cm²	20,378 in² / 131473 cm²	22,642 in² / 146081 cm²
Rear - Wet Disc Brake Surface Area	30,750 in² / 198388 cm²	30,750 in² / 198388 cm²	32,730 in² / 211163 cm²
Standards	ISO 3450:2011	Service and Secondary: ISO 3450:2011	Service and Secondary: ISO 3450:2011
Load Brake	Rear service brakes	Rear service brakes	Rear service brakes
Dynamic Retarding Power - Continuous	5,480 hp	5,480 hp	5,480 hp

Weight Distributions Approximate
Specification	794 AC	796 AC	798 AC
Front Axle - Empty	49 %	47 %	47 %
Rear Axle - Empty	51 %	53 %	53 %
Front Axle - Loaded	33 %	33 %	33 %
Rear Axle - Loaded	67 %	67 %	67 %

Body Hoists
Specification	794 AC	796 AC	798 AC
Relief Valve Setting - Raise	3,029 psi	3,029 psi	3,029 psi
Body Raise Time - High Idle	24 s	21 s	21 s

Capacity HE Body 100% fill factor
Specification	794 AC	796 AC	798 AC
Struck	108-133 m³ (142-175 yd³)	97-153 m³ (127-200 yd³)	129-200 m³ (168-261 yd³)
Heaped (SAE 2:1)	180-222 m³ (236-290 yd³)	186-237 m³ (243-310 yd³)	218-276 m³ (285-361 yd³)

Service Refill Capacities
Specification	794 AC	796 AC	798 AC
Fuel Tank	1,300 gal (US)	1,300 gal (US)	1,300 gal (US)
Cooling System	211 gal (US)	211 gal (US)	211 gal (US)
Crankcase	82 gal (US)	82 gal (US)	82 gal (US)
Final Drive - Each	67 gal (US)	67 gal (US)	67 gal (US)
Hydraulic Tank	296 gal (US)	296 gal (US)	296 gal (US)
Hydraulic System - Including Tank	385 gal (US)	385 gal (US)	385 gal (US)
Diesel Exhaust Fluid Tank	100 gal (US)	100 gal (US)	100 gal (US)

Dimensions (Approximate)
Specification	794 AC	796 AC	798 AC
Height - Top of ROPS	22.25 ft	22.05 ft	22.1 ft
Overall Length	50.75 ft	51.44 ft	51.44 ft
Wheel Base	21.83 ft	21.9 ft	21.9 ft
Rear Axle - Tail	15.5 ft	16.07 ft	16.07 ft
Loading Height - Empty	22.92 ft	23.85 ft	25.54 ft
Overall Height - Body Raised	48.42 ft	48.85 ft	48.85 ft
Centerline Front Tire Width	23 ft	23.06 ft	23.06 ft
Inside Body Width	28.08 ft	29.44 ft	29.44 ft
Centerline of Rear Dual Tire Width	18.75 ft	19.5 ft	19.5 ft

Cab
Specification	794 AC	796 AC	798 AC
ROPS Standards (1)	Rollover Protective Structure (ROPS) meets ISO 3471:2008 criteria for operator and ISO 13459:2012 for trainer	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer	ROPS (Rollover Protective Structure) meets ISO 3471:2008 for Operator and ISO 13459:2012 for Trainer
FOPS Standards	Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II for operator and ISO 13459:2012 Level II for trainer	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer	FOPS (Falling Objects Protective Structure) meets ISO 3449:2005 Level II for Operator and ISO 13459:2012 Level II for Trainer

Steering
Specification	794 AC	796 AC	798 AC
Steering Standards	ISO 5010:2019	ISO 5010:2019	ISO 5010:2019
Steer Angle	39 °	39 °	39 °

More in Cat: 797F: retarding arrangements/body options/controls, 797B: shift controls/oil renewal/altitude equipment, 777B.

Cat 794 AC, 796 AC, and 798 AC specifications

History and service record of 794 AC, 796 AC, and 798 AC

Sources for this page

Cat 794 AC, 796 AC, and 798 AC: Configuration records