Cat 775G Off-Highway Truck

Off-Highway Trucks


About the Cat 775G Off-Highway Truck


Caterpillar is pleased to introduce to you the 775G 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; both 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 the level of savings. With Cat G Series trucks in your haul fleets, 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.


Rated Engine Speed 2000 r/min
Gross Power - SAE J1995 825 HP
Net Power - SAE J1349 783 HP
Net Power - 80/1269/EEC 791 HP
Net Power - ISO 9249 791 HP
Bore 5.4 in
Stroke 6 in
Displacement 1648 in³
Engine Power - ISO 14396 813 HP
Net Torque 2874 ft-lb
Peak Torque - Speed 1300 r/min
Weights - Approximate
Maximum Gross Vehicle Weight 246503 lb
Operating Specifications
Nominal Payload Class (100%) 71.3 ton (US)
Top Speed - Loaded 42 mile/h
Body Capacity - SAE 2:1 55.23 yd³
Maximum Working Payload (110%) 78.3 ton (US)
Not to Exceed Payload (120%)* 85.5 ton (US)
Forward - 1 6.7 mile/h
Forward - 2 9.4 mile/h
Forward - 3 12.7 mile/h
Forward - 4 17 mile/h
Forward - 5 23 mile/h
Forward - 6 31.1 mile/h
Forward - 7 42 mile/h
Reverse 8.8 mile/h
Brake Surface - Front 257 in²
Brake Surface - Rear 9497 in²
Body Hoists
Pump Flow - High Idle 118 gal/min
Relief Valve Setting - Raise 2502 psi
Relief Valve Setting - Lower 500 psi
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 42.7 yd³
Heaped 2:1 (SAE) 55.5 yd³
Capacity - Flat Floor - 100% Fill Factor
Struck 42.2 yd³
Heaped 2:1 (SAE) 55.2 yd³
Weight Distributions - Approximate
Front Axle - Empty 50 %
Front Axle - Loaded 34 %
Rear Axle - Empty 50 %
Rear Axle - Loaded 66 %
Rear axle - Oscillation 8.1 °
Empty Loaded Cylinder Stroke Front 9.2 in
Empty Loaded Cylinder Stroke Rear 5.8 in
Service Refill Capacities
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)
Brake Hoist System 85 gal (US)
Brake/Hoist Hydraulic Tank 46.5 gal (US)
Crankcase 24 gal (US)
Torque Converter - Transmission System - HRC 18 gal (US)
Torque Converter - Transmission System - LRC 16 gal (US)
Turning Diameter - Front 77.1 ft
Steer Angle 31 °
Turning Circle - Clearance Diameter 85.6 ft


The Operator Experience

Operator Confidence
  • Ergonomics that put controls within reach
  • New braking performance and design
  • Engine braking option for Automatic Retarding Control
  • 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
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


The Cat C27 ACERT diesel engine is delivering 5% 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.
G Series introduces a new planetary powershift transmission control strategy called APECS. APECS takes the benefits of ECPC (Electronic Clutch Pressure Control) 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 stand still and exceptionally smooth shift and ride quality.
A new Traction Control System 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

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 which is the new speed limiting feature. Speed limiting allows the truck to travel in its most fuel efficient gear.
  • Auto Neutral Idle - as the 775G 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.

Structural Integrity

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. Extending brake life can also be achieved by choosing the optional Cat Engine Brake. This Caterpillar design works in conjunction with the automatic retarder control (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.
The 773G's structures have updated castings, improved bolted joints, and a larger rear axle.

Power Train

G Series trucks retain the highly productive and reliable Cat C27 ACERT diesel engine.
  • With a 5% 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 (standard on Tier 4 Final) 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

For customers purchasing trucks outside of North America, Caterpillar offers emission controls similar to those used for Tier 2/Stage II regulations.

G Series Body Strategy

Caterpillar has made it easier to get the right body for your materials and job site needs. The 775G has a Dual Slope, a Flat Floor and a Quarry body option. Our base Flat Floor and Dual Slope 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. Our Quarry body has a 25 mm (0.98 in), 400 BNH steel floor and is designed specifically for limestone applications without additional liners. Two additional liner packages for the Flat Floor and Dual Slope bodies 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 Guidelines are in place to help you maximize component life and the availability of your truck. Your Cat dealer can further explain the 10/10/20 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 nominal payload. Payloads in excess of 120% of nominal exceed the truck's design parameters.

Machine Information and Monitoring

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.
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 775G 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 (TPMS)
TPMS - 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
  • TPMS stores 2,400 payload cycles; reports on weights, haul cycle times, 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 TPMS, 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.


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.
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 775G 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. Note that Tier 4 Final equipped machines require ultra-low sulfur diesel fuel and low ash engine oil.
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.
G Series will introduce time-saving service improvements to simplify monitoring and maintaining the machine.
Air Inlet Filters
The engine air inlet filters are conveniently located for secure, simple service.


Cat trucks offer operators a comfortable, confident ride with safety features that help them 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 (TPMS) providing payload, fuel, segment and cycle time information
  • Engine overspeed protection using ARC
  • Three levels of warning for parameters outside of their working zones
Safety features help operators stay informed, alert, and in control.


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. With G Series, Caterpillar is pleased to be releasing its first North American Tier 4 Final product - two years prior to the implementation of the regulation. In addition to contributing to better air quality, G Series offers lower operator sound levels and new ways to conserve fuel.
  • 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
  • Improved air quality with Tier 4 Final emission controls (for North America) reducing Nox and Particulate Matter by 90% over Tier 3 as well as reduced emissions from fuel conservation
  • Parts commonality with other Cat equipment



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