777 (07B) Water Truck

Cat Water Solutions: 777 Off-Highway Water Truck

A water truck may be one of the most important pieces of support equipment at your mine or quarry site – and the support you need is just as important. That’s why Caterpillar is now offering a fully integrated solution to control dust – backed by the one you trust – connected with Cat® MineStar Edge™ to increase efficiency.

777 Water Truck


Cat® Water Solutions helps you efficiently reduce haul road dust to enhance safety and increase productivity at your job site, quarry, or mine. A fully integrated truck, tank, and water delivery system – connected with scalable levels of technology helps you solve overwatering and underwatering issues with a focus on sustainable operations. This turnkey solution with Cat branded tank offerings is sold and supported by the local Cat dealer you know and trust.Longer description goes hereIndustrail OEM


— Lower dust levels, increase visibility, maintain haul road safety — know where and when to water
— With automated water delivery, the operator can remain focused on traffic and driving
— When the water tank is full, the auto shutoff feature prevents overfilling and results in increased component life
— Monitor tank fill from inside the cab
— The water delivery system features automatic start and stop, based on truck speed, which eliminates overwatering at road intersections to improve safety for all vehicles on site
— New Traction Control System (TCS) and Wet Disc Braking is standard on all four corners of the truck
— Automatic Retarding Control (ARC) for downhill grades


— Easy, low-effort access to the cab
— Ergonomic, intuitive controls, with left side power window and automatic temperature control
— Spacious cab with window area that supports visibility
— Integrated footrest provides comfort and support
— Cab is isolation mounted reducing noise and vibration — sound suppression has decreased noise by 50%
— Lighting packages illuminate both to the side and front of the vehicle
— Factory-installed, integrated and durable ergonomic cab water controls are user-friendly and easy to learn


Properly watered haul roads directly impact fleet cycle times, enabling you to meet production targets.
— Spend less time maintaining haul roads using proper watering techniques to solve overwatering and underwatering
— Prevent damage to trucks and reduce unplanned downtime with properly watered haul roads
— Pump features soft startup and shuts off automatically when the tank is empty, eliminating damage and preventing the pump from running dry
— The 777 is faster and more efficient with a 7% increase in torque for more power to the ground, new transmission controls, and higher travel speeds.


The Cat Water Delivery System (WDS) helps you manage water effectively and sustainability — helping you do more with less.
— WDS utilizes automatic start and stop to help eliminate overwatering at road intersections
— WDS provides variable water flow based on truck speed, ensuring most efficient water placement
— The water cannon operates while truck is idling, reducing fuel consumption by up to 50%

The 777 introduces several key fuel conservation features:
— Auto Neutral Idle: as the 777 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 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 trucks, Caterpillar offers speed limiting that allows the truck to travel at a more fuel efficient engine speed and gear selection.
— New APECS transmission controls increase fuel efficiency by maintaining momentum and speed on grade.

The water cannon operates at idle, which reduces fuel consumption during cannon operation by up to 50%.


Cat Water Solutions trucks are sold, serviced & supported by the local Cat dealer you know and trust.
— Full support of Cat dealer and parts network
— Cat dealer installation & retrofit kits available
— The tank is covered by a Caterpillar Warranty
— The truck is eligible for Equipment Protection Plans (EPP) & Customer Value Agreements (CVAs)


    — Two fuel economy modes can be adjusted to meet your daily production needs
    — For the U.S. and Canada, Tier 4 emission controls are available


    Cat MineStar Edge uses cloud-based connectivity through cellular and WiFi connection to collect and manage data at any job site. We offer two levels of connectivity (Basic & Premium*) to meet any customer need using Cat MineStar Edge. Additional functionality will be released in the future.
    — Connectivity includes data logging capabilities critical to minimizing safety-related liability.
    — Water Solutions data can help ensure customers are meeting regulatory requirements.
    — Asset Management options include productivity, water usage, fuel & water tank levels, when & where to apply water, geofencing, asset location and remote management of water distribution.


    Customer need: "I need to know where my truck is and how much water it's distributing."

    Basic Connectivity automates basic data collection, eliminating paper recording by the operator:
    — Real-time & historical reporting**
    — Truck location and utilization data (starts & stops / routes)
    — Fuel and water level
    — Whether or not the truck is spraying water
    — Water Delivery System utilization (auto vs. manual mode)


    Customer need: "I need to know what my operators are doing and how much water I'm using."

    Premium Connectivity offers a comprehensive reporting package with data & reports that can help operators improve watering technique/efficiency
    — Water usage by truck/fill station
    — Volume of water put down over time and area covered
    — Rate of water being put down, water delivery system setting by location, truck, and conditions
    — Activity breakdown including time & distance (watering, not watering, stopped, etc.)
    — Real-time reporting to the operator on water coverage & need (route, heat map, decay map)**1

    *Basic connectivity package comes standard on all Cat Water Solutions trucks with a 6-month complimentary service-based offering for better data insights. **Based on equipment connectivity via WiFi or cellular data. 1 Feature to be included in future update.

  • Standard Equipment
  • Optional Equipment
  • Specs
  • Docs

Standard Equipment

  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
    • 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, rear
    • Alarm, backup
    • Alternator, 115 ampere
    • Auxiliary jump start receptacle
    • Batteries, maintenance-free, 12V (4), 190 amp-hour
    • Electrical system, 25 AMP, 24V to 12V converter
    • Lighting system
      – Backup light (halogen)
      – Directional signals/hazard warning, (front and rear LED)
      – Headlights, (halogen) with dimmer
      – Payload, indicator lights
      – Operator access courtesy lights
      – Side profile lights
      – Stop/tail lights (LED)
      – Service lights
    • 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
    • Fluid level monitoring
    • Hoist lever
    • Horn, electric
    • Light – dome
    • Light – courtesy
    • Load counter, automatic
    • Advisor display
    • VIMS
    • TPMS
    • 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
    • Adaptive economy mode
    • Object detection (4 cameras, 4 radars)
    • Product Link™ Ready (Level 1)
    • TKPH/TMPH (Tons Kilometer Per Hour/ Tons Mile Per Hour)
    • Work Area Vision System (WAVS)
    • Cat MineStar Edge™: Level 1 - Basic (Equipment Tracking)*
    • *Basic connectivity package comes standard on all Cat Water Solutions trucks with a 6-month complimentary service-based offering
    • Engine crankcase
    • Driveline
    • Fan and A/C
    • Extended Life Coolant to –35° C (–30° F)
    • 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
    • Traction Control System (TCS) (new version)
    • Attachment Zone
    • Controls: Factory installed and integrated into cab
    • Water System Monitor: integrated into cab, programmable spray configurations, automatic diagnostic messages
    • Variable Hydraulic Pump Drive: 1,200 gpm at speeds of 3 to 25 mph with auto shut-off and soft startup
    • Stainless Steel Spray Heads: maintenance free, patented design resists corrosion
    • Independent Hydraulic Cooling System: minimizes overheating
    • Water Cannon: hydraulically controlled, integrated joystick with cab controls, optional nozzles
    • Parts & service available through global Cat dealer network
  • Cat Branded Water Tank Offerings with Options
    • Cat branded tanks include additional features and options commonly selected by customers in the industry.
      – Splash guards, fill chute, and rock ejectors are standard.
      – Hoist cylinder mounting on all tank offerings enhances serviceability
      – Manufactured and supplied by recognized tank providers (covered by a Caterpillar warranty)

Optional Equipment

  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
    • 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)
    • Cat MineStar Edge™: Level 2 - Premium (Production Recording)**
    • **Phased introduction 2022



Long Name:
Cat Water Solutions: 777 Off-Highway Water Truck
777 (07B) Water Truck


Engine Model
Cat® C32B
Gross Power - SAE J1995
1025 HP / 765 kW
Engine Speed
1800 r/min / 1800 r/min
Net Power - SAE J1349
916 HP / 683 kW
Fuel Optimized
5.7 in / 145 mm
6.4 in / 162 mm
1959 in³ / 32.1 l
Note (1)
Net Power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, muffler, and alternator with engine speed at 1,800 rpm.
Note (2)
Power rating applies at 1,800 rpm when tested under the specified condition for the specified standard.
Note (3)
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 (4)
No engine derating required up to 2286 m (7,500 ft) for Tier 4/Stage V.
Note (5)
Meets U.S. EPA Tier 4 Final and EU Stage V emission standards.

Cat Water Delivery System (WDS)

Maximum water flow
1200 gal(US)/min / 3785 l/min
Water per spray head (minimum)
35 gal(US)/min / 130 l/min
Water per spray head (maximum)
600 gal(US)/min / 2270 l/min
Spray head opening range (minimum)
0.04 in / 1 mm
Spray head opening range (maximum)
0.75 in / 19 mm
Maximum size debris flushed through spray head
0.75 in / 19 mm
Spray system hydraulic tank capacity
7.25 gal (US) / 27.5 l
Maximum number of rear spray heads
Minimum number of rear spray heads (recommended 3)
Minimum number of front/side spray heads
Maximum number of front/side spray heads
Maximum water from cannon (idle)
600 gal(US)/min / 2271 l/min
Maximum water from cannon (high idle)
1250 gal(US)/min / 4732 l/min
Maximum cannon spray distance
200 ft / 61 m
Wet water pump/hydraulic motor coupling
Operator selectable coverage: 0.2-0.8 L/m² (4 kph - 40 kph) / 0.05-0.2 gal/ft² (3 mph - 25 mph). Coverage rates above 0.6 L/m² may not be available at higher speeds depending on head count and configuration.
Note (1)
Opening is automatically controlled by the system to achieve AutoMode Coverage or Manual Mode Flow Rate.
Note (2)
AutoMode Spray controls water coverage automatically to the number of heads being used and ground speed achieved.
Note (3)
Manual Mode allows the operator to set a water flow rate that is constant regardless of ground speed.
Note (4)
Spray Heads on competitive water distribution systems require tools and maintenance to change flow and spray pattern. Caterpillar is the only company to have variable active spray heads to regulate water spray.
Note (5)
Water flow is continually adjusted during operation to conserve water and achieve desired coverage and flow rate

Tank Configurations

Water Tank Capacity
up to 75 700 L (20,000 gal)

Operating Specifications

Top Speed - Loaded
41.7 mile/h / 67.1 km/h
Water Tank Capacity Range: 69 700 - 75 700 L (18,400 - 20,000 gal)

Tank Configurations

Multiple tank configurations are offered based on customer preference and regional locations. Water Tank Capacity Range: 69 700 - 75 700 L (18,400 - 20,000 gal)
Machine Weight (with water tank full)
307,946 - 327,964 lb / 139 682 - 148 762 kg
Empty Machine Operating Weight (without water / with fuel)
155,993 - 161,416 lb / 70 757 - 73 217 kg
Water Tank - Max Empty Weight (no WDS)
38,669 - 44,092 lb / 17 540 - 20 000 kg
Note (1)
Cat branded tanks include additional features and options commonly selected by customers in the industry. Splash guards, fill chute, and rock ejectors are standard.

Operating Specifications

Note (2)
Operator selectable coverage: 0.2-0.8 L/m² (4 kph - 40 kph) / 0.5-0.2 gal/ft² (3 mph - 25 mph)

Tank Configurations

Note (2)
Hoist cylinder mounting on all tank offerings enhances serviceability.

Weights - Approximate

Target Gross Machine Weight
363000 lb / 164654 kg
Chassis Weight
115217 lb / 52262 kg


Forward - 1
6.6 mile/h / 10.7 km/h
Forward - 2
9.1 mile/h / 14.6 km/h
Forward - 3
11.9 mile/h / 19.2 km/h
Forward - 4
16.6 mile/h / 26.7 km/h
Forward - 5
22.5 mile/h / 36.2 km/h
Forward - 6
30.2 mile/h / 48.6 km/h
Forward - 7
40.9 mile/h / 65.9 km/h
7.5 mile/h / 12.1 km/h
Maximum travel speeds with standard 27.00R49 (E4) tires.

Final Drives

Differential Ratio
Planetary Ratio
Total Reduction Ratio

Braking System

Brake Surface - Front
6331 in² / 40846 cm²
Brake Surface - Rear
15828 in² / 102116 cm²
Brake Standards
ISO 3450:2011

Body Hoists

Pump Flow - High Idle
6331 gal/min / 458 l/min
Relief Valve Setting - Raise
2750 psi / 18950 kPa
Relief Valve Setting - Lower
500 psi / 3450 kPa
Body Raise Time - High Idle
15 s / 15 s
Body Lower Time - Float
13 s / 13 s
Body Lower Time - High Idle
13 s / 13 s

Weight Distributions - Approximate

Front Axle - Empty
46 % / 46 %
Front Axle - Loaded
33 % / 33 %
Rear Axle - Empty
54 % / 54 %
Rear Axle - Loaded
67 % / 67 %


Empty Loaded Cylinder Stroke Front
2.9 in / 74.7 mm
Empty Loaded Cylinder Stroke Rear
2.5 in / 66 mm
Rear axle - Oscillation
5.4 ° / 5.4 °


Steering Standards
ISO 5010:2007
Steer Angle
30.5 ° / 30.5 °
Turning Diameter - Front
83 ft / 25.3 m
Turning Circle - Clearance Diameter
93 ft / 28.4 m


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.

Service Refill Capacities

Fuel Tank (1)
300 gal (US) / 1136 l
Fuel Tank (2)
350 gal (US) / 1325 l
Cooling System
63.4 gal (US) / 240 l
28.7 gal (US) / 109 l
59.9 gal (US) / 227 l
Final Drive - Each
20 gal (US) / 76 l
Steering System - Including Tank
14.1 gal (US) / 53.6 l
Brake Hoist System
85 gal (US) / 322 l
Torque Converter - Transmission System
36.5 gal (US) / 138.5 l


Air Conditioning
18390 Btu/lb / 42789 Btu/kWh
Heater / Defroster
43930 Btu / 11070 kJ/kg
ROPS Standards (1)
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.
Note (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 the cab doors and the cab windows closed.
Note (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).
Note (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.