Cat 773G

Off-Highway Trucks

About the Cat 773G


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.<br>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.<br>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.


Engine Model Cat® C27
Rated Engine Speed 2000 r/min
Gross Power - SAE J1995 578 kW
Net Power - SAE J1349 542 kW
Net Power - 80/1269/EEC 542 kW
Net Power - ISO 9249 542 kW
Bore 137 mm
Stroke 152 mm
Displacement 27 l
Engine Power - ISO 14396 607 kW
Net Torque 3896 N·m
Note (3) No engine derating required up to 3810 m (12,500 ft) for Tier 2 Equivalent.
Peak Torque - Speed 1300 r/min
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).
Note (1) Power rating applies at 2,000 rpm when tested under the specified condition for the specified standard.
Weights - Approximate
Maximum Gross Vehicle Weight 102740 kg
Operating Specifications
Nominal Payload Class (100%) 56 t
Top Speed - Loaded 67.6 km/h
Maximum Working Payload (110%) 61.5 t
Body Capacity - SAE 2:1 35.75 m³
Note (2) * Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross machine weight limitations.
Note (1) Capacity with Dual Slope body – no liner.
Maximum Allowable Payload (120%)* 67.1 t
Target Payload (100%) 56 t
Forward - 1 10.8 km/h
Forward - 2 15.1 km/h
Forward - 3 20.4 km/h
Forward - 4 27.4 km/h
Forward - 5 37 km/h
Forward - 6 50.1 km/h
Forward - 7 67.6 km/h
Reverse 14.1 km/h
Note Maximum travel speeds with standard 24.00R35 (E4) tires.
Final Drives
Differential Ratio 3.64:1
Planetary Ratio 4.80:1
Total Reduction Ratio 17.49:1
Brake Surface - Front 655 cm²
Brake Surface - Rear 61269 cm²
Brake Standards ISO 3450:2011
Body Hoists
Pump Flow - High Idle 448 l/min
Relief Valve Setting - Raise 17250 kPa
Relief Valve Setting - Lower 3450 kPa
Body Raise Time - High Idle 9.5 s
Body Lower Time - Float 13 s
Body Power Down - High Idle 13 s
Capacity - Dual Slope - 100% Fill Factor
Struck 26.86 m³
Heaped (SAE 2:1)* 35.75 m³
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) * ISO 6483:1980.
Capacity - Flat Floor - 100% Fill Factor
Struck 26.25 m³
Heaped (SAE 2:1)* 35.49 m³
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) * ISO 6483:1980.
Weight Distributions - Approximate
Front Axle - Empty 53 %
Front Axle - Loaded 35 %
Rear Axle - Empty 47 %
Rear Axle - Loaded 65 %
Rear axle - Oscillation 8.1 °
Empty Loaded Cylinder Stroke Rear 149 mm
Empty Loaded Cylinder Stroke Front 234 mm
Service Refill Capacities
Fuel Tank 795 l
Cooling System 171 l
Differential - Final Drives 145 l
Steering Tank 36 l
Steering System - Including Tank 54 l
Crankcase 90 l
Torque Converter - Transmission System - LRC 61 l
Brake Hoist System 322 l
Brake/Hoist Hydraulic Tank 176 l
Note (2) Caterpillar recommends the customer evaluate all job conditions and consult the tire manufacturer for proper tire selection.
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.
Standard Tire 24.00R35 (E4)
ROPS Standards Rollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
FOPS Standards Falling Object Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
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 (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 (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 t
Turning Diameter - Front 23.5 m
Steering Standards SAE J1511 FEB94 ISO 5010:1992
Steer Angle 31 °
Turning Circle - Clearance Diameter 26.1 m


The Operator Experience – Best in the industry

Operator Confidence
  • Ergonomics that put controls within reach
  • New braking performance and design
  • Engine braking option for Automatic Retarding Control (ARC)
  • Improved retarder lever ergonomics and activation
  • Mirror options including heated and concave
  • Seating that adjusts to individual needs with suspension and three-point harness
  • Seating for trainer or folds up for additional work space
  • In-cab fluid level monitoring
  • Machine event warnings and messaging
The 773G provides operator confidence, comfort, and safety.
Operator Comfort
  • Industry leading access system, with low-effort climbing and three-points of contact
  • Exceptionally smooth machine performance
  • A 50% noise reduction from the F Series cab
  • Automatic temperature control
  • Cat Comfort Seat is Series III with vibration reduction
  • Electric window – left side
  • New foot rest addition
Operator Safety
  • Emergency egress out right side, hinged window
  • Enhanced ROPS/FOPS design in cab structure
  • Secondary braking
  • Ground level daily checks
  • TKPH/TMPH Tire Monitoring System
  • Warnings via Advisor display
  • Body up speed limited, can be set by customer
  • New tread plate design on access system; better traction; sheds material from walkways

Performance – Intelligent application of power and technology

The Cat C27 diesel engine is delivering 12% additional power to the drive train. As a result, new and more robust drive train components, including a larger drive shaft and differential gears, have been designed to handle the power.
The 773G has an intelligent application of power and technology.
G Series introduces a new planetary powershift transmission control strategy called APECS. APECS takes the benefits of Electronic Clutch Pressure Control (ECPC) and adds part throttle shifting and torque shift management. The result is exceptionally smooth automotive-type shifting and ride quality. APECS also retains torque and momentum through the shifts; increasing performance on grades. The result is quick starts from a standstill and exceptionally smooth shift and ride quality.
A new Traction Control System (TCS) is now steering sensitive to differentiate between tire spin or high speed turns. The system now uses the hydraulically applied service brakes (vs. spring applied secondary brakes), allowing it to engage sooner and at lower speeds. G Series TCS modulates power and braking instantaneously between the two wheel groups, allowing a more appropriate response to ground conditions and returning the truck to solid footing much sooner.

Fuel Saving Strategies – Solutions that support your lowest cost per ton

Fuel Saving Strategies
  • Standard Economy Mode – G Series can adjust engine power based on your individual needs. With this feature, fuel savings are achieved by reducing power between 0.15 to 15 percent.
  • Adaptive Economy Mode – New for G Series – requires a baseline for production from you. As the truck goes through the haul cycle, it constantly evaluates your baseline against opportunities to reduce power and save fuel. It’s fully automatic with no special operation required.
  • Speed Limiting – while you can continue to gear limit your G Series trucks, Caterpillar offers another alternative you can utilize – the new speed limiting feature. Speed limiting allows the truck to travel in its most fuel efficient gear.
  • Auto Neutral Idle – as the 773G waits for the loader or crusher while idling in a forward gear, the transmission will automatically slip into a neutral state to avoid stalling the torque converter and raising engine rpm. As soon as the operator releases the brake or applies throttle, the truck is instantly back in the forward gear.
  • Engine Idle Shutdown – when your G Series truck is in park and idles for more than a preset time, which is set by the customer, the truck will initiate engine shutdown to conserve fuel. This feature can be time adjusted or turned on or off according to your specific needs.
G Series trucks have fuel saving strategies.

Structural Integrity – Designed for years of off-road service

New Brake Design
G Series has increased the number of springs in its brake design. This increases the force available to disengage the brakes ensuring clearances are maintained, reducing wear. A new brake wear indicator can be found on the rear wheels to help you monitor brake life.
The 773G's structures have updated castings, improved bolted joints, and a larger rear axle.
Extending brake life can also be achieved by choosing the optional Cat Engine Brake. This Caterpillar design works in conjunction with the ARC to slow the machine.
Rear Wheel Steel Spindles
G Series wheel spindles are solid steel and interchangeable from one side to the other, extending their useful service life.
Inverted Rear Cylinders
For G Series, Caterpillar has inverted the rear suspension cylinders to better protect the rods, keeping them cleaner for longer durations.
Updated castings, improved bolted joints, and a larger rear axle have matched the chassis design with the higher power ratings and performance specifications of the truck.

Power Train – Application specific designs for industry leading performance

G Series trucks retain the highly productive and reliable Cat C27 diesel engine.
  • With a 12% boost in power, the C27 is delivering higher torque for work.
  • With the precision and responsiveness of Cat MEUI™ fuel injectors and electronic controls, the C27 accurately controls fuel, emissions, and performance.
  • The C27 is carefully balanced with vibration controls that reduce noise and protect against unnecessary wear.
  • The C27 is cooled by either a demand fan or conventional cooling fan.
G Series trucks retain the highly productive and reliable Cat C27 ACERT diesel engine.
Planetary Powershift Transmission
With new control strategies, this proven transmission is better than ever. Its new features include gear changes as smooth as an automobile and more torque through the shifts, getting the truck up to speed faster and negotiating grades quicker.

Emission Controls – Major improvements for air quality using simple to use, reliable solutions

NOx Reduction
Supported by cleaner burning, ultra-low sulfur diesel fuel, and low ash oils, Caterpillar uses its engine-mounted NOx Reduction System (NRS) Technology to cool combustion chamber temperatures to control NOx production.
Tier 4/Stage V C27 ACERT engines are equipped with MEUI-C injectors. These injectors have an improved fuel shut off response time, saving fuel and reducing emissions.
PM Reduction
Located on top of the engine are two diesel oxidation catalysts (DOC), one for each exhaust outlet. These diesel oxidation catalysts reduce particulate emissions.
For customers purchasing trucks outside of North America, Caterpillar offers emission controls similar to those used for Tier 2 regulations.

G Series Body Strategy – Bodies to meet your application and material needs

Caterpillar has made it easier to get the right body for your materials and jobsite needs.
The 773G has Dual Slope and Flat Floor body options.
The 773G has Dual Slope and Flat Floor body options.
Our base bodies have a 20 mm (0.78 in), 400 BNH steel floor. Adding a steel or rubber liner is optional for those applications when you are working with highly abrasive or high impact materials.
Two additional liner packages are available from the factory:
  • A 16 mm (0.62 in), 400 BNH steel liner.
  • A 102 mm (4.01 in) rubber liner.
  • Sideboards are optional from the factory for the Flat Floor or Dual Slope bodies.
  • A body heat diverter kit is optional for both Dual Slope and Flat Floor bodies.
  • You will find additional body specifications at the back of this document.
Caterpillar’s 10/10/20 Policy
Caterpillar’s 10/10/20 Payload Policy is in place to help you maximize component life and the availability of your truck. Your Cat dealer can further explain the 10/10/20 Payload Policy. For optimum body life, Caterpillar recommends that 110% payloads occur no more than 10% of the time and that the average of all loads equal the target payload. Payloads in excess of 120% of target exceed the truck’s design parameters.

Machine Information and Monitoring – Lowering your cost per ton with vital fleet information

Your G Series truck has the ability to communicate and receive valuable information. Information that can lead you to producing at a lower cost per ton.
Your G Series truck has the ability to communicate and receive valuable information.
Instrument Cluster
The instrument cluster is used primarily by the operator for quick and simple machine information at a glance. This display also warns the operator with solid lights (Category 1 Warnings) or flashing lights (Category 2 or 3 Warnings) as well as an audible alarm when an event is occurring.
Cat Advisor Display
The Advisor Display has five menus: 1. Operator: allows 10 people to set up individual profiles and preferences. 2. Monitor: displays four parameters per screen including: Payload – there are three sections: Payload State, Payload, and Target. Payload State – will display “Loading,” “Last Pass” or “Loaded.” Payload – displays the calculated payload weight, weight is taken twice to confirm. Target – displays the target payload. 3. Service: diagnostics including events, data logger, parameters, calibrations, and more. 4. Settings: set specific targets for autolube intervals, speed limit, and more. 5. Service Mode: a portal to password protected parameters.
Vital Information Management System (VIMS) is the hardware and software behind the machine information and payload tracking that comes through the Advisor display on your 773G truck. VIMS is standard, and like the Truck Production Management System, can greatly improve your ability to manage your fleet efficiency, machine production, and provide operators with vital machine information.
Truck Production Management System
Cat Truck Production Management System will help you get the best return on your truck investment by making sure you’re hauling appropriate payloads with every cycle.
  • Indicator side lights show the loader operator when they are on their last pass and when the truck is fully loaded
  • Truck Production Management System stores 2,400 payload cycles; reports on weights, haul cycle times, and distances with date and time stamps
Ton Kilometer per Hour (TKPH), Ton Mile per Hour (TMPH) Tire Monitoring
This program takes the payload value from Truck Production Management System, combines it with ambient air temperature, machine speed, and the manufacturer’s TKPH (TMPH) rating for your tires and calculates tire condition continuously. As a tire approaches its temperature limits, the operator gets a warning inside the cab. This Caterpillar exclusive feature is an important tool in your efforts to extend tire life.
NOTE: TKPH (TMPH) is a measure of the tire’s temperature limits to prevent reverse vulcanization of the tire and the associated damage.
Cat Product Link™*
Cat Product Link allows remote monitoring of equipment to improve overall fleet management effectiveness. Product Link is deeply integrated into machine systems. Events and diagnostic codes as well as hours, fuel, idle time, and other detailed information are transmitted to a secure web-based application – VisionLink®. VisionLink includes powerful tools to convey information to users and dealers, including mapping, working and idle time, fuel level and more.
*Product Link licensing not available in all areas. Please consult your Cat dealer for availability.

Serviceability – Clean, convenient, time-saving solutions

G Series will introduce time-saving service improvements to simplify monitoring and maintaining machine fluid levels, help keep your site clean, and reduce your costs associated with service.
G Series will introduce time-saving service improvements to simplify monitoring and maintaining the machine.
Fluid Fill Service Center
A new optional fluid fill service center is located on the right front side of the machine. Technicians can check the level of all machine fluids including:
  • Transmission/torque converter hydraulic oil
  • Hoist/Brake hydraulic oil
  • Diesel fuel
  • Engine oil
  • Engine coolant
A lighted keypad will indicate three green lights if the fluid level is full, two green lights if the fluid level is at normal levels, and one light if fluid should be added.
Cab Fluid Level Monitoring
The fluid levels cannot be checked in the cab via the Advisor screen options menu. All the fluids are being monitored, but will only indicate to the operator when the level is below a safe operating level.
Electrical Service Center
An Electrical Service Center is also at ground level located on the right front bumper of the machine.
This service center offers connections to: 1. Master Disconnect Switch 2. Auxiliary Start Receptacle 3. Light 4. VIMS Port 5. ET Port 6. Hydraulics Lockout 7. Engine Lockout 8. Breaker – Engine Control 9. Breaker – Alternator 10. Breaker – Main Electrical
Brake Wear Indicator
G Series trucks will come equipped from the factory with a simple, time-saving brake wear indicator on the left rear wheel that provides technicians with a visible indicator for rear break wear levels.
Due to improved hydraulic system updates, which have made the system more efficient, Caterpillar is able to extend hydraulic filter life to 1,000 hours under normal operating conditions. All engine filters are conveniently grouped and easily accessible.
The 773G fuel tank is now larger (795 L or 210 gallons) to extend running time. The tank includes two new sight gauges that levels at ¼ full and ¾ full.
Cab Air Filter Precleaner
An optional cab precleaner is available for air filters. This option can significantly extend your cab filter life and service intervals. Our field follow program machines saw significant benefits to filter life in the G Series machines.
Air Inlet Filters
The engine air inlet filters are conveniently located for secure, simple service.

Safety – Focus on people and resources

Cat trucks offer operators a comfortable, confident ride with safety features that help them stay informed, alert, and in control.
Safety features help operators stay informed, alert, and in control.
  • Ground level daily check points
  • Excellent visibility using mirrors, optional camera (WAVS), and in-cab display
  • Solid, stable walking/working platforms with good traction, material shedding, handrails
  • Emergency egress from within the cab through a hinged right side window
  • Ground level electrical service box for lockout/tag out, steering system lockout
  • Ground level optional fluid fill center with level check keypad
  • Secondary steering, engages automatically
  • Three levels of braking (service, secondary, engine) red foot pedal for secondary brakes
  • ROPS/FOPS structures in cab
  • Brake wear indicator
  • Three-point harness operator seat belt
  • Trainer seat with lap belt
  • Body up speed limiting
  • Haul road speed limiting, setting safe conditions for everyone
  • Automatic Retarder Control, smooth predictable performance
  • New Traction Control System, returns the truck to solid footing sooner
  • In-cab fluid level monitoring for operator
  • TKPH/TMPH – Tire Monitoring System
  • Truck Production Monitoring System providing payload, fuel, segment, and cycle time information
  • Engine overspeed protection using ARC
  • Three levels of warning for parameters outside of their working zones

Sustainability – Sustainability benefits us all

At Caterpillar, sustainable designs have always been a priority. Cat trucks have historically offered industry leading availability, life cycles, and parts commonality. Today we offer even more ways to reduce our impact on the environment.
At Caterpillar, sustainable designs have always been a priority.
  • Fuel conservation features: two fuel economy modes, speed limiting, Auto Neutral Idle, Engine Idle Shutdown, new Traction Control System
  • Keeping the site clean with grouped service locations; ecology drains and convenient, optional fluid fill and electrical service centers
  • Reducing operator cab noise levels by 50% from previous trucks
  • Longer component life for tires using TCS and TKPH/TMPH
  • Longer life steel spindles, new brake designs, stronger frame
  • Cat Reman parts offer recycling and reuse opportunities with no risk
  • Longer service life for hydraulic oil filters (1,000 hrs), and air filters with precleaner installed
  • Parts commonality with other Cat equipment



Please contact us for requests or advise. 


  • Call
  • Arrow

Request a quotation



Email us

We will get in contact within 24 hours.

How would you like us to contact you? *