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773G Off-Highway Truck

Nominal Payload Class (100%)

61 ton (US)

Engine Model

Cat® C27

Top Speed - Loaded

41.6 mile/h


Caterpillar is pleased to introduce to you the 773G Off-Highway Truck. You may be asking how, after 40 years of building trucks, Caterpillar has improved this product’s ability to support your business.
G Series has been designed and manufactured using the latest quality control technologies – virtual and hands on. This product has over 30,000 hours of proven performance in the hands of customers prior to production, all of which ensures the truck delivered to your yard is ready to work, reliably and dependably.
In addition to quality, Cat G Series trucks will lower your costs with seven different ways to help you conserve fuel. We offer you two customizable fuel economy modes that will let you choose your level of savings. With Cat G Series trucks in your haul fleet, you can be more productive, spend less time on maintenance, and support the environment with new levels of eco performance. Your crew will appreciate all the new comfort and conveniences in our updated cab. Simply put, Cat G Series trucks can and will make a positive difference to both your business and people – all day, every day.


360° View


360° Exterior view. Double click on the image to zoom in on any area of the product.


360° interior view. Double click on the image to zoom in on any area of the product.


  • Engine
    Spec Value
    Engine Model Cat® C27
    Rated Engine Speed 1800 r/min
    Gross Power - SAE J1995 775 HP
    Net Power - SAE J1349 719 HP
    Net Power - ISO 9249 762 HP
    Net Power - 80/1269/EEC 762 HP
    Bore 5.4 in
    Stroke 6 in
    Displacement 1648 in³
    Note (1) Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
    Engine Power - ISO 14396 764 HP
    Peak Torque - Speed 1200 r/min
    Net Torque 3148 ft-lb
    Note (3) No engine derating required up to 3048 m (10,000 ft) for Tier 4/Stage V.
    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).
  • Weights - Approximate
    Spec Value
    Maximum Gross Vehicle Weight 226501 lb
  • Operating Specifications
    Spec Value
    Nominal Payload Class (100%) 61 ton (US)
    Top Speed - Loaded 41.6 mile/h
    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)
    Note (1) Capacity with Dual Slope body – no liner.
    Body Capacity - SAE 2:1 46.8 yd³
    Target Payload (100%) 61 ton (US)
    Maximum Allowable Payload (120%)* 73.2 ton (US)
  • Transmission
    Spec Value
    Forward - 1 6.6 mile/h
    Forward - 2 9.3 mile/h
    Forward - 3 12.6 mile/h
    Forward - 4 16.8 mile/h
    Forward - 5 22.8 mile/h
    Forward - 6 30.7 mile/h
    Forward - 7 41.6 mile/h
    Reverse 8.7 mile/h
    Note Maximum travel speeds with standard 24.00R35 (E4) tires.
  • Final Drives
    Spec Value
    Differential Ratio 3.64:1
    Planetary Ratio 4.80:1
    Total Reduction Ratio 17.49:1
  • Brakes
    Spec Value
    Brake Surface - Front 257 in²
    Brake Surface - Rear 9497 in²
    Brake Standards ISO 3450:2011
  • Body Hoists
    Spec Value
    Pump Flow - High Idle 118 gal/min
    Relief Valve Setting - Raise 2502 psi
    Relief Valve Setting - Lower 500 psi
    Body Raise Time - High Idle 10 s
    Body Lower Time - Float 14 s
    Body Power Down - High Idle 14 s
  • Capacity - Dual Slope - 100% Fill Factor
    Spec Value
    Struck 35.13 yd³
    Heaped (SAE 2:1)* 46.76 yd³
    Note (2) * ISO 6483:1980.
    Note (1) Contact your local Cat dealer for body recommendation.
  • Capacity - Flat Floor - 100% Fill Factor
    Spec Value
    Struck 34.33 yd³
    Note (2) * ISO 6483:1980.
    Heaped (SAE 2:1)* 46.41 yd³
    Note (1) Contact your local Cat dealer for body recommendation.
  • Weight Distributions - Approximate
    Spec Value
    Front Axle - Empty 53 %
    Front Axle - Loaded 35 %
    Rear Axle - Empty 47 %
    Rear Axle - Loaded 65 %
  • Suspension
    Spec Value
    Rear axle - Oscillation 8.1 °
    Empty Loaded Cylinder Stroke Rear 5.8 in
    Empty Loaded Cylinder Stroke Front 9.2 in
  • Service Refill Capacities
    Spec Value
    Fuel Tank 210 gal (US)
    Cooling System 45 gal (US)
    Differential - Final Drives 38 gal (US)
    Steering Tank 9.5 gal (US)
    Steering System - Including Tank 14 gal (US)
    Torque Converter - Transmission System - HRC 18 gal (US)
    Crankcase 24 gal (US)
    Brake Hoist System 85 gal (US)
    Brake/Hoist Hydraulic Tank 46.5 gal (US)
  • Tires
    Spec Value
    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 (2) Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
    Standard Tire 24.00R35 (E4)
  • ROPS
    Spec Value
    FOPS Standards Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
    ROPS Standards Rollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
  • Sound
    Spec Value
    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.
  • Steering
    Spec Value
    Turning Diameter - Front 77.1 ft
    Steering Standards SAE J1511 FEB94 ISO 5010:1992
    Steer Angle 31 °
    Turning Circle - Clearance Diameter 85.6 ft

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)