Cat Off-Highway Trucks 777G (Tier 4)
Product Feature
Safety
A Focus on Personnel
The 777G is designed to minimize slips and falls, providing firm footing and stability.
Ground level daily check points
Low effort, integrated access system with hand rails for three points of contact
Aggressive tread plate on all step areas with lighted access for after dark
Integrated windshield washing platform
Confidence and Control
Confident operators will move material quickly, efficiently and profitably.
Wet Disc Braking is standard on all four corners of the truck
Four corner park brake for slope holding capability and brake wear indicator
Automatic Retarding Control for downhill grades
New traction control system
Visibility
The 777G supports your site safety plan with object detection.
Visual or audible warning of people or objects close to the machine
A combination of cameras and radar to identify potential hazards
Key Features
The 777G is solidly constructed for safety.
Rollover and Falling Object Protection is part of the cab structure
Emergency egress available through the right-side hinged window
Laminated glass is used in the front and left side windows
Ground level engine shutdown
Back-up alarm
Operator Safety
Providing features that fit your operators' needs.
Fully adjustable and suspended seat
Integrated three point safety belt
Trainer seat with lap belt facilitates on-the-job task training
Audible warnings for Events and fluid level monitoring
Automatic derate of the engine possible on some events
Job Site Safety
Safety is a key to hauling productively.
Speed limiting on the haul is new and more efficient than gear limiting
Excellent visibility with mirror and lighting options
Secondary steering in the event of a shutdown
Speed limiting during body up operations
Operator Work Environment
Comfort
The comfort of your crew will dictate their productivity and awareness on the job.
Easy, low effort access to the cab
Ergonomic, intuitive controls
Left side power window
Automatic temperature control inside the cab
Throttle lock convenience for long uphill climbs
The cab is spacious with window area that supports visibility
An integrated footrest provides comfort and support
Sound suppression has decreased noise by 50%
The cab is isolation mounted reducing noise and vibration
Lighting packages illuminate both to the side and front of the vehicle
Automotive quality shifting from new transmission controls
Confidence and Control
Strong, predictable performance will help your operators achieve the lowest cost per ton.
Automatic Retarding Control reduces operator effort and controls braking on downhill grades
Performance and health information at a glance using well lit gauges and the Advisor Message Display
Solid steering performance from a design that maintains its integrity
Stopping power from fade-resistant brakes - purpose built for off road applications and the loads carried by the 777G
Traction control is now steering sensitive and uses the service brakes to control wheel slip. The result: faster activation and improved response to wheel slip
Visibility is excellent with extensive mirror options, large window areas and object detection.
Cab layout subject to change with optional equipment.
Information
The Advisor display and VIMS software are important reporting tools that help you analyze:
Productivity, haul road efficiency, operator skill
Fuel use, cycle times, idle time
Machine health and Events
Environmental Responsibility
As you progress towards a more sustainable business model, the Cat 777G can help.
Fuel and Emissions
There are substantial fuel saving strategies on the 777G
Two fuel economy modes can be adjusted to meet your daily production needs
For the U.S. and Canada, Tier 4 Final emission controls are available two years ahead of schedule
Sound
Operator noise is reduced by 50%
Spectator noise levels can be lowered up to 50% with the optional “XQ” package
Component Life
Remanufactured parts are an economical and eco-friendly alternative to new
Extend tire life by using the TKPH/TMPH feature that calculates tire loading
A mud protection package is available to help keep power train components clean
Castings and box section frame construction ensure long life
A new rear axle housing adds strength and enables axle filtration and lubrication
Hydraulic oil filter life is extended to 1,000 hours under normal conditions
Autostall enables quick operating temperatures for best performance and life
Delayed Engine Shutdown prevents hot shut downs that can reduce component life
Tier 4 Final
Caterpillar's simple solution is transparent to your operators, controls emissions and increases fuel efficiency.
Two engine-mounted diesel oxidation catalyst canisters control particulate matter
Our NRS Technology replaces a portion of intake air with exhaust gas to control combustion temperatures and Nox production
Precise, extremely fine atomization of fuel under all load conditions
Cutting Your Fuel Costs
The 777G introduces several key fuel conservation features:
Auto Neutral Idle - as the 777G idles in a forward gear, the transmission will automatically slip in and out of a neutral state to avoid stalling the torque converter and raising engine rpm.
Engine Idle Shutdown - when your G Series truck is in park and idles for more than a preset time, 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.
Speed Limiting - while you can continue to gear limit your G Series trucks, Caterpillar offers speed limiting that allows the truck to travel at a more fuel efficient engine speed and gear selection.
Transmission Controls - New APECS transmission controls increase fuel efficiency by maintaining momentum and speed on grade.
Economy Modes
Standard Economy Mode - G Series can save fuel by adjusting engine power through this newly adjustable economy mode. Adjust the power based on your site, fleet and economic conditions. The power can be reduced from 0.5 to 15 percent.
Adaptive Economy Mode - New for G Series - this economy mode requires a baseline for production from you using the Advisor display. As the truck transits the haul cycle, it is constantly evaluating its ability to meet your baseline in a reduced power rating. Where full power is needed, full power is applied, where reduced power works, reduced power is applied. It's fully automatic with no special operation required.
Performance
The 777G will haul your material faster and more efficiently with increases in torque, new transmission controls and higher travel speeds.
A 7% increase in torque puts more power to the ground
New transmission controls carry more torque through the shifts, producing faster cycle times, most noticeably on grades
An increase in travel speed in 7th gear also helps generate faster cycle times
Traction Control
G Series introduces benefits to your fleet when running in wet conditions by introducing a more responsive traction controls system.
The system is steering sensitive to determine slip vs. high speed turns
The system engages at slower speeds returning traction sooner
The system engages sooner in the slip, potentially reducing tire wear
The system modulates instantly between the two wheel groups for control
Using the hydraulic service brakes facilitates the instant modulation and responsiveness
Long Term Value and Durability
At Caterpillar, we know keeping your trucks running is critical to your business, that's why we use industry leading technology to ensure maximum machine availability and reliability.
Structural Strength
The backbone of the 777G is its frame. Our frames are designed for off-road integrity and are built for more than one life cycle.
We strategically apply castings with box section construction to manage off-road stresses
A new front frame design increases the approach angle on ramps and grades
A new robust rear axle housing supports the truck's performance increases
Brake Performance
Cat trucks provide powerful, fade-resistant braking for your off road applications. G Series introduces new ways to extend brake life.
Additional springs in the design reduce wear and increase service life
All four corners have wet disc braking standard (front brake lockout no longer an option)
Slope holding capability benefits from all wheel parking brake actuation
Brake life can be extended by choosing the optional Cat Engine Brake
A brake wear indicator keeps you informed of maintenance timing
Extended life brake material is available for extreme applications
Not only proven, but continuously improving with the latest technical advantages and efficiencies.
Suspension
Front struts use our proven king pin design for effective absorption of haul road shocks
Rear suspension cylinders have been inverted to minimize contamination
Planetary Powershift Transmission with APECS Controls
New APECS controls are delivering performance improvements
Torque shift management allows the truck to power through shift points
Part throttle shifting provides an exceptionally smooth ride
ECPC electronically controls clutch pressures for long life
Updated Cat C32 ACERT
For the 777G, the engine and torque converter are producing 7% more usable torque giving the truck new performance levels and quick haul cycles
Cat MEUI™ injectors provide high pressure, fine atomization for fuel efficiency and load response
Low pressure fuel lines from the tank to the engine simplify service
The C32 is carefully balanced with vibration controls that reduce noise and protect against unnecessary harmonics
Cooling is provided by either a demand fan (standard for Tier 4 Final machines) or a conventional cooling fan
Ground level engine shutdown switch for safety
Excellent high-altitude capability
Steering
The steering linkage is designed to provide good feedback to the operator
The Cat king pin front suspension system maintains steering tolerances and also tire alignment
Body Options
Our bodies are designed to offer you the best possible performance, longevity and value by taking into consideration tire life, the truck's center of gravity, load distribution targets and power train design.
Dual Slope Body
If your haul profile includes steep slopes, the dual slope body offers excellent material retention.
The dual slope has a heaped capacity of 60.2 m3 (78.8 yd3) in its standard configuration
Two sizes of side board are available to increase capacity for lighter weight materials
400 BNH steel on interior surfaces offers excellent wear characteristics
Material is carried low and centered for stability
A single 16 mm (0.62 in) steel liner option is available for this body
A single rubber liner is available for this body
X Body
If you're feeding a crusher, the flat floor of the X Body is an excellent choice for metering material.
The X Body also offers excellent material retention and stability
400 BNH and 450 BNH steel are used on internal surfaces for wear protection
Two steel liner options are available for the X Body
A rubber liner option is also available
The Rubber Liner
This important option will protect your truck's body in hard rock applications.
Available for the dual slope and X Bodies
Suppresses noise and vibration to the operator
Suppresses spectator noise
Prolongs body life in high impact, hard rock applications
Coal Bodies
For lightweight materials, Caterpillar offers coal bodies of varying capacities.
Material density will dictate the recommended body size
400 BNH steel is used for long wear life
Capacities include:
- 89 m3 (116 yd3) - 106 m3 (139 yd3) - 110 m3 (144 yd3) - 126 m3 (165 yd3)
XQ Package
The XQ package reduces the 777G's spectator noise level to 112 dB(A) using both the ISO 6393 and ISO 6395 test procedures. This test result has an accuracy of plus or minus 1 dB(A).
This package includes a noise reduced Cat C32 engine, panels that enclose the engine compartment and sound reduction material within the radiator cowl.
Sound reduction material in the cab is standard on the truck.
Mud Protection Package
A mud package that encloses the engine compartment will help protect against sticky, difficult material.
Service Convenience
Service Centers - Fluid Fill
You will save both time and money using the optional fluid fill service center.
Fill and extraction for all fluids in one location
Key pad tells employees current fluid levels
Includes all oils, coolant and fuel
Conveniently located at ground level
Lighted for night time use
Service Centers - Electrical Connections
The convenience of ground level access to VIMS data
Ground level access to ET port
Master disconnect switch
Engine lockout switch
Hydraulics lockout switch
Breaker access
Brake Monitoring
G Series introduces several brake system updates:
A brake wear indicator is standard
Additional internal springs increase separation forces to increase life
Product Parameter
Overview
G Series represents a new era for this size class from Caterpillar. With your input, we have designed and manufactured a truck that is reliable, economical and offers comfort, confidence and control for your operators. Your long-term success is our goal; with G Series trucks, we're on the right road.
Engine
Units:
Engine Model | Cat® C32 ACERT™ | Cat® C32 ACERT™ |
Gross Power - SAE J1995 | 1025.0 HP | 765.0 kW |
Net Power - SAE J1349 | 916.0 HP | 683.0 kW |
Net Power - 80/1269/EEC | 916.0 HP | 683.0 kW |
Net Power - ISO 9249 | 916.0 HP | 683.0 kW |
Bore | 5.7 in | 145.0 mm |
Stroke | 6.4 in | 162.0 mm |
Displacement | 1959.0 in³ | 32.1 C |
Cylinders | 12 | 12 |
Engine Power - ISO 14396 | 1008.0 HP | 752.0 kW |
Engine Speed | 1800.0 r/min | 1800.0 r/min |
Net Torque | 3899.0 ft-lb | 5286.0 N·m |
Peak Torque - Speed | 1200.0 r/min | 1200.0 r/min |
Weights - Approximate
Target Gross Machine Weight | 363000.0 lb | 164654.0 kg |
Operating Specifications
Nominal Payload Class (100%) | 98.4 t | 89.4 t |
Top Speed - Loaded | 41.7 mile/h | 67.1 km/h |
Body Capacity - SAE 2:1 | 83.8 yd³ | 64.1 m³ |
Maximum Payload (110%) | 108.2 t | 98.3 t |
Nominal Payload (100%) | 98.4 t | 89.4 t |
Not to Exceed Payload (120%)* | 118.1 t | 107.2 t |
Transmission
Forward - 1 | 6.8 mile/h | 10.9 km/h |
Forward - 2 | 9.2 mile/h | 14.8 km/h |
Forward - 3 | 12.5 mile/h | 20.1 km/h |
Forward - 4 | 16.9 mile/h | 27.2 km/h |
Forward - 5 | 22.9 mile/h | 36.9 km/h |
Forward - 6 | 30.7 mile/h | 49.4 km/h |
Forward - 7 | 41.7 mile/h | 67.1 km/h |
Reverse | 7.7 mile/h | 12.4 km/h |
Final Drives
Differential Ratio | 2.736:1 | 2.736:1 |
Planetary Ratio | 7.0:1 | 7.0:1 |
Total Reduction Ratio | 19.1576:1 | 19.1576:1 |
Brakes
Brake Standards | ISO 3450:1996 | ISO 3450:1996 |
Brake Surface Area - Front | 6331.0 in² | 40846.0 cm² |
Brake Surface Area - Rear | 15828.0 in² | 102116.0 cm² |
Body Hoists
Pump Flow - High Idle | 120.9 gal/min | 458.0 l/min |
Relief Valve Setting - Raise | 2750.0 psi | 18950.0 kPa |
Relief Valve Setting - Lower | 500.0 psi | 3450.0 kPa |
Body Raise Time - High Idle | 15.0 s | 15.0 s |
Body Lower Time - Float | 13.0 s | 13.0 s |
Body Lower Time - High Idle | 13.0 s | 13.0 s |
Capacity - Dual Slope - 100% Fill Factor
Struck | 54.8 yd³ | 41.9 m³ |
Heaped 2:1 (SAE) | 78.8 yd³ | 60.2 m³ |
Weight Distributions - Approximate
Front Axle - Empty | 46.0 % | 46.0 % |
Front Axle - Loaded | 33.0 % | 33.0 % |
Rear Axle - Empty | 54.0 % | 54.0 % |
Rear Axle - Loaded | 67.0 % | 67.0 % |
Suspension
Rear axle - Oscillation | 5.4 ° | 5.4 ° |
Empty Loaded Cylinder Stroke Front | 2.9 in | 74.7 mm |
Empty Loaded Cylinder Stroke Rear | 2.5 in | 66.0 mm |
Service Refill Capacities
Fuel Tank (1) | 300.0 gal (US) | 1136.0 C |
Cooling System | 63.4 gal (US) | 240.0 C |
Steering System - Including Tank | 14.1 gal (US) | 53.6 C |
Brake Hoist System | 85.0 gal (US) | 322.0 C |
Brake Hoist System - Includes Tank | 117.0 gal (US) | 444.0 C |
Crankcase | 28.7 gal (US) | 109.0 C |
Differentials | 59.9 gal (US) | 227.0 C |
Final Drive - Each | 20.0 gal (US) | 76.0 C |
Fuel Tank (2) | 350.0 gal (US) | 1325.0 C |
Torque Converter - Transmission System | 36.5 gal (US) | 138.5 C |
Tires
Standard Tire | 27.00R49 (E4) | 27.00R49 (E4) |
ROPS
ROPS/FOPS Standards | Standards | Standards |
Sound
Sound Standards | Standards | Standards |
Steering
Turning Diameter - Front | 83.0 ft | 25.3 m |
Steering Standards | SAE J1511 FEB94 ISO 5010:1992 | SAE J1511 FEB94 ISO 5010:1992 |
Steer Angle | 30.5 ° | 30.5 ° |
Turning Circle - Clearance Diameter | 93.0 ft | 28.4 m |
Capacity - X Body - 100% Fill Factor
Heaped 2:1 (SAE) | 83.8 yd³ | 64.1 m³ |
Struck | 56.3 yd³ | 43.1 m³ |
Capacity - Coal Bodies - 100% Fill Factor
SAE 2:1 - For use with material densities less than 950 kg/m3 (1,600 lb/yd3) | 165.0 yd³ | 126.0 m³ |
SAE 2:1 - For use with material densities of 1040-1160 kg/m3 (1,750-1,950 lb/yd3) | 139.0 yd³ | 106.0 m³ |
SAE 2:1 - For use with material densities of 1160 kg/m3 (1,950 lb/yd3) | 116.0 yd³ | 89.0 m³ |
SAE 2:1 - For use with material densities of 950-1040 kg/m3 (1,600-1,750 lb/yd3) | 144.0 yd³ | 110.0 m³ |