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Nominal Payload Class (100%)61 ton (US) (55.3 t)
Engine ModelCat® C27
Top Speed - Loaded41.6 mile/h (66.9 km/h)
Rated Engine Speed1800 r/min (1800 r/min)
The G Series represents a new era for Cat’s Off-Highway Trucks and the 773G provides our customers with a quality operating environment that enhances productivity and provides significant savings in fuel consumption, too. Ergonomically designed with an operator’s comfort in mind, the 773G has an updated cab with new comforts as well as controls conveniently placed within reach of the operator’s hands. Built with a Cat C27 diesel engine, this 60-ton payload uses increased torque delivering 5% additional horsepower. An ideal pass match for the 773G Off-Highway Truck is Cat’s 988K Wheel Loader, 990K Wheel Loader, or the 390F Hydraulic Excavator. Simply put, the 773G will make a positive difference in haul performance all day, every day for today and tomorrow’s work.


Nominal Payload Class (100%)61 ton (US) (55.3 t)
Engine ModelCat® C27
Top Speed - Loaded41.6 mile/h (66.9 km/h)
Rated Engine Speed1800 r/min (1800 r/min)
Gross Power - SAE J1995775 HP (578 kW)
Net Power - SAE J1349719 HP (536 kW)
Net Power - ISO 9249762 HP (568 kW)
Net Power - 80/1269/EEC762 HP (568 kW)
Bore5.4 in (137 mm)
Stroke6 in (152 mm)
Displacement1648 in³ (27 l)
Struck35.13 yd³ (26.86 m³)
Struck34.33 yd³ (26.25 m³)
Front Axle - Empty53 % (53 %)
Front Axle - Loaded35 % (35 %)
Rear Axle - Empty47 % (47 %)
Rear Axle - Loaded65 % (65 %)
Forward - 16.6 mile/h (10.6 km/h)
Forward - 29.3 mile/h (15 km/h)
Forward - 312.6 mile/h (20.3 km/h)
Forward - 416.8 mile/h (27 km/h)
Forward - 522.8 mile/h (36.7 km/h)
Forward - 630.7 mile/h (49.4 km/h)
Forward - 741.6 mile/h (66.9 km/h)
Reverse8.7 mile/h (14 km/h)
Differential Ratio3.64:1
Planetary Ratio4.80:1
Total Reduction Ratio17.49:1
Brake Surface - Front257 in² (655 cm²)
Brake Surface - Rear9497 in² (61269 cm²)
Brake StandardsISO 3450:2011
Fuel Tank210 gal (US) (795 l)
Cooling System45 gal (US) (171 l)
Differential - Final Drives38 gal (US) (145 l)
Steering Tank9.5 gal (US) (36 l)
Steering System - Including Tank14 gal (US) (54 l)
Pump Flow - High Idle118 gal/min (448 l/min)
Relief Valve Setting - Raise2502 psi (17250 kPa)
Relief Valve Setting - Lower500 psi (3450 kPa)
Body Raise Time - High Idle10 s (10 s)
Body Lower Time - Float14 s (14 s)
Body Power Down - High Idle14 s (14 s)
Rear axle - Oscillation8.1 ° (8.1 °)
NoteMaximum travel speeds with standard 24.00R35 (E4) tires.
Note (1)Productive capabilities of the 773G truck are such that, under certain job conditions, TKPH (TMPH) capabilities of standard or optional tires could be exceeded and, therefore, limit production.
Note (1)Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
Torque Converter - Transmission System - HRC18 gal (US) (70 l)
Crankcase24 gal (US) (90 l)
Brake Hoist System85 gal (US) (322 l)
Brake/Hoist Hydraulic Tank46.5 gal (US) (176 l)
FOPS StandardsFalling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
Note (2)Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
Peak Torque - Speed1200 r/min (1200 r/min)
ROPS StandardsRollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
Sound Standards (3)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.
Sound Standards (2)The exterior sound pressure level for the standard machine measured at a distance of 15 m (49 ft) according to the test procedures specified in SAE J88:2008, mid‑gear moving operation is 86 dB(A).
Sound Standards (1)The operator Equivalent Sound Pressure Level (Leq) is 76 dB(A) when SAE J1166 FEB2008 is used to measure the value for an enclosed cab. This is a work cycle sound exposure level. The cab was properly installed and maintained. The test was conducted with the cab doors and the cab windows closed.
Turning Diameter - Front77.1 ft (23.5 m)
Engine Power - ISO 14396764 HP (570 kW)
Net Torque3148 ft-lb (4269 N·m)
Target Payload (100%)61 ton (US) (55.3 t)
Body Capacity - SAE 2:146.8 yd³ (35.8 m³)
Empty Loaded Cylinder Stroke Front9.2 in (234 mm)
Empty Loaded Cylinder Stroke Rear5.8 in (149 mm)
Note (2)Ratings based on SAE J1995 standard air conditions of 25° C (77° F) and 100 kPa (29.61 Hg) barometer. Power based on fuel having API gravity of 35 at 16° C (60° F) and an LHV of 42 780 kJ/kg (18,390 BTU/lb) when engine used at 30° C (86° F).
Maximum Gross Vehicle Weight226501 lb (102739 kg)
Note (2)* Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
Maximum Working Payload (110%)67.1 ton (US) (60.8 t)
Note (1)Contact your local Cat dealer for body recommendation.
Heaped (SAE 2:1)*46.41 yd³ (35.49 m³)
Note (3)No engine derating required up to 3048 m (10,000 ft) for Tier 4/Stage V.
Note (2)* ISO 6483:1980.
Note (1)Capacity with Dual Slope body – no liner.
Note (1)Contact your local Cat dealer for body recommendation.
Note (2)* ISO 6483:1980.
Heaped (SAE 2:1)*46.76 yd³ (35.75 m³)
Standard Tire24.00R35 (E4)
Steering StandardsSAE J1511 FEB94 ISO 5010:1992
Steer Angle31 ° (31 °)
Turning Circle - Clearance Diameter85.6 ft (26.1 m)
Maximum Allowable Payload (120%)*73.2 ton (US) (66.4 t)

Benefits and Features


  • Haul your materials faster with a 5% accelerated travel speed.
  • Put more power to the ground with a 15% increase in torque.
  • Enjoy greater productivity while using a more responsive Traction
    Control System (TCS).
  • Reduce tire wear with maximum by engaging TCS early in the slip.
  • Strong, predictable performance helps operators achieve the lowest cost per ton.


  • Up to 13% less fuel consumption.
  • Advanced Productivity Electronic Control System (APECS) allows the engine and transmission to communicate on a high level. This communication allows the machine to better utilize the power andtorque the engine is producing.
  • Automatically optimize fuel consumption with the G Series feature—Adaptive Economy mode reduces fuel use withoutaffecting productivity and can be engaged with a single button.
  • Find improvements in fuel efficiency with auto neutral idle.
  • Haul your G Series truck at a more fuel-efficient engine speed and gear selection with speed limiting.
  • Conserve fuel with integrated Engine Idle Shutdown by the engine automatically initiating when the truck is in park and idle for a preset amount of time.


  • Improvements in accessibility with safe, ground-level access tofuel fill and daily maintenance points.
  • Ensure three points of contact when entering and exiting the machine with strategically placed walkways and grab rails.
  • Ground-level refueling requires no climbing on the machine to fill the fuel tank.
  • The ground-level engine shut-off switch stops all fuel to the engine when activated and shuts down the machine safely.


  • Completely redesigned cab for a whole new standard in visibility,comfort, and productivity.
  • The new operator seat placement provides easier operation and comfort to the operator.
  • Improvements in enlarged views of the work area andits surroundings.
  • Access connectivity and decrease clutter with more storage areas in the new designed cab.
  • Enjoy the easy, automotive-quality shifting with the new transmission controls.
  • Automatic cab temperature controls.


  • Integrated systems give you the ability to make timely, fact-based
    decisions to maximize efficiency, improve productivity, and lower
  • Gain valuable insight into how your machine is performing by
    continuously monitoring and collecting vital machine data via the
    advisor display with the Vital Information Management System
    (VIMS™) software.
  • Truck Production Management System (TPMS) provides accurate weighing of the materials, stores 2,400 payload cycles, and reportson, haul cycle times, and distances with date and time stamps.
  • External payload indicator lights alert the loader when to stop, reducing the risk of machine overloading.
  • Product Link™ system connects to each machine wirelessly,
    allowing you to monitor location, hours, fuel use, productivity, idle
    time, and diagnostic codes.
  • VisionLink®
    wirelessly connects you to your equipment, giving
    you access to essential information you need to know to run your business.
  • The Cat 773G is MineStar™ ready and includes Cat Product Link
    Elite and VIMS to help optimize equipment management, remote
    monitoring capabilities, machine availability, and component life while reducing both repair costs and the risk of catastrophic


  • Grouped service points.
  • Control particulate matter with two engine-mounted diesel oxidation catalyst canisters.
  • NRS technology replaces a portion of intake air with exhaust gas to control combustion temperatures and NOx production.
  • Parts commonality with other Cat equipment.
  • Resolve problems before failure occurs with VIMS notifications.
  • Autostall enables quick operating temperatures for best performance life.
  • Prevents hot shutdowns that can reduce component life with the use of delayed engine shutdown.
  • Hydraulic oil filter life is extended to 1,000 hours under normal operating conditions.


  • Get the right body option—Dual Slope, Flat Floor, or Quarry—for your material and jobsite needs.
  • For haul profiles including steep slopes, an optional Dual Slope body is available—offering excellent material retention.
  • The X body’s flat floor is perfect for metering material, especially when feeding the crusher.
  • Protect your truck’s body life in high-impact, hard rock applications with the optional rubber liner—available for Dual Slope and X bodies.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Cat C27 Tier 4/Stage V compliant diesel engine:
    – Air cleaner with precleaner (2)
    – Air-To-Air Aftercooler (ATAAC)
    – Electric start
    – Engine idle shutdown
    – Ether starting aid
    – Exhaust muffler
    – NGMR radiator
    For Tier 4 regions only (U.S./Canada):
    – Aftertreatment system
    • NOx Reduction System (NRS)
    • Diesel Oxidation Catalyst (DOC)

    – Demand fan
    – MEUI-C fuel system
  • Braking system:
    – Extended Life Brakes
    – Automatic Retarder Control (ARC)
    – Manual retarder (utilizes rear oil-cooled, multiple disc brakes)
    – Brake release motor (towing)
    – Dry disc brakes (front)
    – Front brake disconnect switch (front)
    – Oil-cooled multiple disc brakes (rear)
    – Brake wear indicator (rear)
    – Parking brake
    – Secondary brake
    – Service brake
  • Transmission:
    – 7-speed automatic powershift with:
    • Electronic Clutch Pressure Control (ECPC)
    • Advanced Productivity Electronic Control Strategy (APECS)

    – Automatic neutral idle
    – Autostall
    – Second gear start
  • Suspension, front and rear
  • Alarm backup
  • Alternator, 120 Amp
  • Autolube power supply ready
  • Batteries, maintenance-free, 12V (2), 1,400 CCA combined
  • Electrical system, 25 Amp, 24V to 12V converter
  • Lighting system:
    – Backup light (halogen)
    – Directional signals/hazard warning (front and rear LED)
    – Engine compartment light
    – Headlights, (halogen) with dimmer
    – Operator access courtesy lights
    – Side profile lights
    – Stop/tail lights (LED)
  • Service center containing:
    – Battery jump start
    – Breakers with spare fuses
    – Lockout switch
    – Ports, ET and VIMS
    – Service lockout switch (power without engine start)
  • Economy Modes, standard and adaptive
  • Product Link, cellular or satellite
  • Traction Control System (TCS)
  • Truck Production Management System
  • Vital Information Management System (VIMS)
  • Advisor display:
    – Air cleaner service indicator
    – Fluid level monitoring
    – Fuel level monitoring
    – Display languages (market-based)
  • Air conditioning/heat
  • Automatic temperature control
  • Ashtray and cigarette lighter
  • Coat hook
  • Cup holders (4)
  • Diagnostic connection port, 24V
  • Entertainment radio ready:
    – 5 amp converter
    – Speakers
    – Antenna
    – Wiring harness
  • Foot rest
  • Gauges/indicators:
    – Brake oil temperature gauge
    – Coolant temperature gauge
    – Engine overspeed indicator
    – Fuel level
    – Hour meter
    – Speedometer with odometer
    – Tachometer
    – Transmission gear indicator
  • Hoist lever
  • Horn
  • Light – courtesy
  • Light – dome
  • Mirrors, non-heated
  • Power port, 24V and 12V (2)
  • Rollover Protection (ROPS)/Falling Object Protection (FOPS)
  • Seat, Cat Comfort Series III:
    – Full air suspension
    – Retractable 3-point seat belt with shoulder harness
  • Seat, training with lap belt
  • Steering wheel, padded, tilt and telescopic
  • Storage compartment
  • Sun visor
  • Throttle lock
  • Window, hinged, right side (emergency exit)
  • Window, powered, left side
  • Windshield wiper intermittent and washer
  • Driveline
  • Engine crankcase
  • Fan
  • Antifreeze
  • Extended life coolant to –34° C (–30° F)
  • Grouped ground-level filters
  • Body down indicator
  • Body safety pin (secures body in up position)
  • Center-mounted rims
  • Fuel tank, 795 L (210 gal)
  • Ground level battery disconnect
  • Ground level engine shutdown
  • Ground level grease fittings
  • Operator Maintenance Manual (OMM)
  • Rims 17 × 35
  • Rock ejectors
  • Secondary steering (electric)
  • Tie down eyes
  • Tow hooks (front)/tow pin (rear)
  • Vandalism protection locks

Optional Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Body heat
  • Body liner
  • Body sideboards
  • Cab precleaner
  • Cat Engine Brake
  • Clustered grease fittings
  • Cold weather packages
  • Fluid fill service center
  • HID lights
  • Mirrors, convex
  • Mirrors, heated
  • Spare rim
  • Visibility package (meets ISO 5006 requirements)
  • Wheel chocks
  • Work Area Vision System (WAVS)