777 (07) Off-Highway Truck



Technical Specifications
Benefits and Features
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The Cat® 777 is engineered to be the most efficient 100-ton mechanical truck in the industry. With your input, we have designed and manufactured a truck that is reliable, durable, and economical, offering comfort, confidence, and control to its operators. With
an improved access system designed to minimize slips and falls, this truck provides firm footing and stability in less than perfect conditions.

Operating Specifications
Target Payload (100%) 101.1 ton (US)
Top Speed - Loaded 40.9 mile/h
Maximum Working Payload (110%) 111.2 ton (US)
Maximum Allowable Payload (120%)* 121.3 ton (US)
Body Capacity - SAE 2:1 83.1 yd³
Note (1) Capacity with flat floor X Body with liner.
Note (2) * Refer to the Caterpillar 10/10/20 Payload Policy for maximum gross vehicle weight limitations.
Engine Model Cat® C32B
Gross Power - SAE J1995 1025 HP
Net Power - SAE J1349 916 HP
Bore 5.7 in
Stroke 6.4 in
Displacement 1959 in³
Peak Torque - Speed 1200 r/min
Engine Speed 1800 r/min
Cylinders 12
Engine Power - ISO 14396 1008 HP
Net Torque Rise Tier 4: 39%. Tier 2: 37%
Note (1) Power rating applies at 1,800 rpm when tested under the specified condition for the specified standard.
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 (3) Available as Tier 4 Final/Stage V equivalent, Tier 3/Stage IIIA equivalent, or Tier 2/Stage II equivalent emission standards.
Note (4) Meets China Nonroad Stage III emission standards equivalent to U.S. EPA Tier 3 or U.S. EPA Tier 2.
Capacity - X Body - 100% Fill Factor
Struck 56.3 yd³
Heaped (SAE 2:1)* 83.8 yd³
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) *ISO 6483:1980
Capacity - Coal Bodies - 100% Fill Factor
SAE 2:1 - For use with material densities of 1160 kg/m3 (1,950 lb/yd3) 116.8 yd³
SAE 2:1 - For use with material densities of 1040-1160 kg/m3 (1,750-1,950 lb/yd3) 139 yd³
SAE 2:1 - For use with material densities of 950-1040 kg/m3 (1,600-1,750 lb/yd3) 144 yd³
SAE 2:1 - For use with material densities less than 950 kg/m3 (1,600 lb/yd3) 164.6 yd³
Capacity - Dual Slope - 100% Fill Factor
Struck 54.8 yd³
Heaped (SAE 2:1)* 78.6 yd³
Note (1) Contact your local Cat dealer for body recommendation.
Note (2) *ISO 6483:1980
Weight Distributions - Approximate
Front Axle - Empty 42 %
Front Axle - Loaded 33 %
Rear Axle - Empty 58 %
Rear Axle - Loaded 67 %
Forward - 1 6.6 mile/h
Forward - 2 9.1 mile/h
Forward - 3 11.9 mile/h
Forward - 4 16.6 mile/h
Forward - 5 22.5 mile/h
Forward - 6 30.2 mile/h
Forward - 7 40.9 mile/h
Reverse 7.5 mile/h
Note Maximum travel speeds with standard 27.00R49 (E4) tires.
Final Drives
Differential Ratio 2.736:1
Planetary Ratio 7.0:1
Total Reduction Ratio 19.1576:1
Brake Standards ISO 3450-2011
Brake Surface Area - Front 6331 in²
Brake Surface Area - Rear 15828 in²
Service Refill Capacities
Fuel Tank (1) 300 gal (US)
Fuel Tank (2) 350 gal (US)
Cooling System 61 gal (US)
Crankcase 28.7 gal (US)
Differentials 59.9 gal (US)
Final Drive - Each 20 gal (US)
Steering System - Including Tank 14.1 gal (US)
Brake Hoist System 117 gal (US)
Torque Converter - Transmission System 36.5 gal (US)
Body Hoists
Pump Flow - High Idle 120.9 gal/min
Relief Valve Setting - Raise 2750 psi
Relief Valve Setting - Lower 500 psi
Body Raise Time - High Idle 15 s
Body Lower Time - Float 13 s
Body Lower Time - High Idle 13 s
Rear axle - Oscillation 5.4 °
Empty Loaded Cylinder Stroke Front 2.9 in
Empty Loaded Cylinder Stroke Rear 2.5 in
Standard Tire 27.00R49 (E4)
Note (1) Productive capabilities of the 777 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.
Weights - Approximate
Target Gross Machine Weight 363000 lb
ROPS Standards Rollover Protective Structure (ROPS) for cab offered by Caterpillar meets ISO 3471:2008 ROPS criteria.
FOPS Standards Falling Objects Protective Structure (FOPS) meets ISO 3449:2005 Level II FOPS criteria.
Turning Diameter - Front 83 ft
Steering Standards ISO 5010:2007
Steer Angle 30.5 °
Turning Circle - Clearance Diameter 93 ft
Sound Standards (1) The operator Equivalent Sound Pressure Level (Leq) is 73 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
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 83 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.


  • Haul your materials faster with an accelerated travel speed.
  • Put more power to the ground with a 7% increase in torque.
  • Advanced Productivity Electronic Control Strategy (APECS)
  • Transmission controls carry more torque through the shifts, producing faster cycle times, most noticeably on grades.
  • Enjoy greater productivity while using a more responsive Traction Control System (TCS).
  • Reduce tire wear with maximum traction by engaging TCS early in the slip.
  • Strong, predictable performance helps operators achieve the lowest cost per ton.


  • Up to 13% less fuel consumption.
  • APECS transmission controls increase fuel efficiency by maintaining momentum and speed on grade.
  • Automatically optimize fuel consumption with the Adaptive Economy mode – reduces fuel use without affecting productivity and can be engaged with a single button.
  • Find improvements in fuel efficiency with auto neutral idle.
  • Haul your 777 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 to fuel fill and daily maintenance points.
  • Ensure three points of contact when entering and exiting the machine with strategically placed walkways and grab rails.
  • Wet disc braking is standard on all four corners of the truck.
  • Ground-level refueling requires no climbing on the machine to fill the fuel tank.
  • The ground-level engine shutoff switch stops all fuel to the engine when activated and shuts down the machine safely.
  • Overload speed limiter works with truck payload system to reduce machine speed automatically when the truck is overloaded.
  • Four-point seat belt for operator and lap belt for trainer seat.
  • Four camera and radar system to identify potential hazards.


  • 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 visibility gain enlarged views of the work area and its surroundings.
  • Access connectivity and decrease clutter with more storage areas with the new designed cab.
  • Enjoy the easy automotive-quality shifting with the new integrated hoist and transmission controls.
  • Automatic cab temperature controls.
  • Simplified operator interface with touchscreen display.
  • Best-in-class lighting with new LED lighting package.


  • Integrated systems give you the ability to make timely, fact-based decisions to maximize efficiency, improve productivity, and lower costs.
  • Gain valuable insight into how your machine is performing by continuously monitoring and collecting vital machine data via the advisor display with the software Vital Information Management System (VIMS™).
  • Truck Production Management System (TPMS) provides accurate weighing of the materials, stores 2,400 payload cycles, and reports on weights, 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 777 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 failure.


  • Grouped service points.
  • Control Particulate Matter (PM) with two engine-mounted diesel oxidation catalyst canisters. (Tier 4 only)
  • NRS technology replaces a portion of intake air with exhaust gas to control combustion temperatures and NOx production. (Tier 4 only)
  • Parts commonality with other Cat equipment.
  • Resolve problems before failure occurs with VIMS notifications.
  • Hydraulic oil filter life is extended to 1,000 hours under normal operating conditions.
  • Redesigned EGR coolers utilize flexible tubes to be more robust to cooling loss and more durable. (Tier 4 only)


  • A Coal body option of varying capacities is available for lightweight materials.
  • 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.


  • New C32B engine with Integrated Fuel Lines (IFL) heads and Dual Sensor Coolant Protection (DSCP) for improved durability, temperature distribution, and structural robustness.
  • Improved transmission life and smooth shifting with APECS.
  • Autostall enables quick operating temperatures for best performance and life.
  • Delayed Engine Shutdown prevents hot shutdowns that can reduce component life.

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • Autostall
    • Engine idle shutdown
    • Air-To-Air Aftercooler (ATAAC)
    • Air cleaner with precleaner (2)
    • Automatic cold mode idle control
    • Electric priming pump
    • Electric cold weather start (two starters and four batteries)
    • Ether starting aid
    • Exhaust, muffler
    • Fuel filter/water separator
    • Turbocharger (2)
    • Braking system:
      – Extended Life Brakes
      – Brake wear indicator
      – Automatic Retarder Control (ARC) (utilizes oil-cooled, multiple disc brakes)
      – Brake release motor (towing)
      – Manual retarder (utilizes oil-cooled, multiple disc brakes)
      – Oil-cooled, multiple disc (front/rear)
      – Parking
      – Secondary
      – Service
    • Transmission
      – Auto neutral idle
      – APECS Software
      – ECPC
    • Part Throttle Shifting
      – 7-speed automatic powershift with Torque Shift Management Electronic Clutch Pressure Control
      – Body up-shift inhibitor
      – Directional shift management
      – Downshift inhibitor
      – Neutral start switch
      – Neutral coast inhibitor
      – Reverse shift inhibitor
      – Reverse neutralizer during dumping
      – Programmable top gear selection
  • Suspension Systems
    • Suspension, rear
  • Electrical
    • Alarm, backup
    • Alternator, 115 ampere
    • Auxiliary jump start receptacle
    • Batteries, maintenance-free, 12V (4), 200 amp-hour
    • Electrical system, 25 AMP, 24V to 12V converter
    • Lighting system (LED)
      – Backup light
      – Directional signals/hazard warning, (front and rear)
      – Headlights with dimmer
      – Payload, indicator lights
      – Operator access courtesy lights
      – Side profile lights
      – Stop/tail lights
      – Service lights
  • Operator Environment
    • Air conditioning
    • Ashtray and cigarette lighter
    • Coat hook
    • Cup holders (4)
    • Diagnostic connection port, 24V
    • Entertainment Radio Ready
      – 5 amp converter
      – Speakers
      – Antenna
      – Wiring harness
    • Gauges/indicators
      – Brake oil temperature gauge
      – Coolant temperature gauge
      – Hour meter
      – Tachometer
      – Engine overspeed indicator
      – Fuel level
      – Speedometer with odometer
      – Transmission gear indicator
    • Heater/defroster (11 070 kCal/43,930 BTU)
    • Auto temp control
    • Hoist lever
    • Horn, electric
    • Light – dome
    • Light – courtesy
    • Load counter, automatic
    • Touchscreen Advisor display
    • VIMS
    • Foot rest
    • Mirrors – heated
    • Power port, 24V and 12V (2)
    • ROPS cab, insulated/sound suppressed
    • Cat Comfort Series III
      – Full air suspension
      – Retractable 3-point seat belt with shoulder harness
    • Steering wheel, padded, tilt and telescopic
    • Storage compartment
    • Sun visor
    • Throttle lock
    • Window, right side, hinged access/egress
    • Electric left side window control
    • Windshield wiper (intermittent) and washer
    • Tinted, laminated glass
  • Technology Products
    • Product Link Ready (Level 1)
    • Adaptive economy mode
  • Guards
    • Engine crankcase
    • Driveline
    • Fan and A/C
  • Fluids
    • Extended Life Coolant to –35° C (–30° F)
  • Other Standard Equipment
    • Clustered grease fittings
    • Body mounting group
    • Body safety pin (secures body in up position)
    • Body down indicator
    • CD-ROM parts book
    • Center-mounted rims
    • Fuel tank (1136 L/300 gal)
    • Ground level battery disconnect
    • Ground level engine shutdown
    • Ground level grease fittings
    • Reservoirs (separate)
      – Brake/hoist
      – Steering
      – Transmission/torque converter
    • Rims 19.5 × 49
    • Rock ejectors
    • Supplemental steering (automatic)
    • Tie down eyes
    • Tow hooks (front)/Tow pin (rear)
    • Vandalism protection locks
    • Wiggins fast fuel
    • Attachment Zone

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Optional Equipment
    • Body heat
    • Body liners
    • Body sideboards
    • Cab precleaner
    • Cat Engine Brake
    • Cold weather packages
    • Fluid fill service center
    • HID lights
    • Mirrors, convex
    • Spare rim
    • Visibility package (meets ISO 5006 requirements)
    • Wheel chocks
    • Work Area Vision System (WAVS)
  • Operator Environment
    • Fluid level monitoring
    • TPMS
  • Technology Products
    • TKPH/TMPH (Tons Kilometer Per Hour/Tons Mile Per Hour)
    • Object Detection (4 cameras, 4 radars)
  • Other Optional Equipment
    • Traction Control System (TCS)

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