815K Soil Compactor

815K Soil Compactor

360° Exterior View

Cat Soil Compactors are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to operate ...


Engine Model
Cat® C7.1 ACERT™: configured for two emissions options
Net Power
Gross Power - SAE J1995 - Tier 4 Final/Stage IV
Gross Power - SAE J1995 - Tier 3/Stage IIIA Equivalent
Gross Power - ISO 14396 - Tier 4 Final/Stage IV
Gross Power - ISO 14396 - Tier 3/Stage IIIA Equivalent
Meets U.S. EPA Tier 4 Final/EU Stage IV emission standards or meets U.S. EPA Tier 3/EU Stage IIIA equivalent emission standards
Torque Rise - Tier 4 Final/Stage IV
Torque Rise - Tier 3/Stage IIIA Equivalent
High Idle Speed
Low Idle Speed
Maximum Altitude - Without Derating
Maximum Net Torque - 1,400 rpm - Tier 3/Stage IIIA Equivalent
Rated Power (SAE J1349) - Tier 4 Final/Stage IV
Maximum Net Torque - 1,400 rpm - Tier 4 Final/Stage IV
Rated Power (SAE J1349) - Tier 3/Stage IIIA Equivalent
Rated Power (Net ISO 9249) - Tier 4 Final/Stage IV
Rated Power (Net ISO 9249) - Tier 3/Stage IIIA equivalent


Drum Width
Drum Diameter
Outside Diameter
Tips per Wheel
Width - Over Drums


Planetary – Fixed
Planetary – Oscillating
Oscillation Angle


Maximum Depth of Cut
Maximum Lift Above Ground
Total Tilt Adjustment
Width - Over End Bits
Width - Moldboard Length
Height - Including Cutting Edge
Blade Tilt Angle - Right - Hydraulic
Blade Tilt Angle - Left - Hydraulic
Blade Tilt Adjustment - Right
Blade Tilt Adjustment - Left

Dimensions (Approximate)

Width - Over Wheels
Wheel Base
Length - With Blade on Ground
Hitch to Centerline of Front Axle
Height - Top of Hood
Height - Top of Exhaust Pipe
Height - Top of Beacon
Ground Clearance - Bumper
Ground Clearance
Centerline of Rear Axle to Bumper
Height - Top of Cab Roof
Turning Radius - Inside of Push Arms

Cab - Suppression

Operator Sound Level - ISO 6396
Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent
Machine Sound Level (ISO 6395) Tier 4/Stage IV

Cab - Standard

Operator Sound Level - ISO 6396
Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent
Machine Sound Level (ISO 6395) Tier 4/Stage IV


Parking Brake
Drum and Shoe, Spring Applied, Hydraulic Released


Travel Speeds - Forward - Third
Travel Speeds - Reverse - Third
Travel Speeds - Reverse - Second
Travel Speeds - Reverse - First
Travel Speeds - Forward - Second
Travel Speeds - Forward - First
Transmission Type
Planetary – Powershift – ECPC

Hydraulic System

Lift Cylinder, Double Acting - Bore and Stroke
101.6 mm × 627 mm (4 in × 24.7 in)
Tilt Cylinder, Double Acting - Bore and Stroke
101.6 mm × 167 mm (4 in × 6.6 in)
Pump Flow at 2,111 rpm
Maximum Supply Pressure
Main Relief Pressure

Hydraulic System - Steering

Vehicle Articulation Angle
84 degrees
Steering System - Pump
Piston – Variable Displacement
Steering System - Circuit
Closed Center Load Sensing
Steering Pressure Limited
Maximum System Flow
147 L/min @ 2,111 rpm (38.8 gal/min @ 2,111 rpm)

Service Refill Capacities

14.8gal (US)
Diesel Exhaust Fluid Tank (Tier 4 Final/Stage IV Only)
4.2gal (US)
Cooling System - Tier 4 Final/Stage IV
21.4gal (US)
All non-road Tier 4 Final and Stage IV diesel engines are required to use: – Ultra Low Sulfur Diesel (ULSD) fuels containing 15 ppm for EPA and 10 ppm for EU (mg/kg) sulfur or less. Biodiesel blends up to B20 are acceptable when blended with 15 ppm for EP
Hydraulic Tank Only
19.8gal (US)
Fuel Tank
132.1gal (US)
Engine Crankcase
5.3gal (US)
Differential - Final Drives - Front
17.2gal (US)
Differential - Final Drives - Rear
17.2gal (US)
Cooling System - Tier 3/Stage IIIA Equivalent
19.3gal (US)

Operating Specifications

Maximum Operating Weight (Tier 4 Final/Stage IV)
Operating Weight
Maximum Operating Weight (Tier 3/Stage IIIA equivalent)

Efficiency and Productivity

Advanced Productivity Electronic Control System (APECS)

The new APECS is designed to improve transmission shifting performance, providing a higher level of comfort for the operator and increasing productivity.

Decelerator Pedal

The left pedal acts as a brake, transmission neutralizer and an engine decelerator to override the engine speed selected by the throttle lock. This enables the operator to slow down when the throttle lock is engaged and to return to throttle lock without pressing a resume or set button again. This aids in maneuvering around trucks, tractors or any other obstacle.

Electro Hydraulic Controls

Operators increase productivity with our responsive implements feature.

  • Operate comfortably through electronically controlled hydraulic cylinder stops
  • Handle easy-to-use soft detent controls
Steering System

Confident machine operation starts with precise machine control enabled by the 815K's load sensing hydraulic steering system.

  • Increase efficiency with our variable displacement piston pumps
  • Achieve precise positioning for easy loading in tight areas with 42 degrees each way of steering articulation
  • Enhance operator comfort with integrated steering and transmission control functions
  • Smoother, faster cycles help reduce operator fatigue through the use of Steering and Transmission Integrated Control System (STIC™)


The 815K is specifically designed and made with purpose built structures to remain safe and durable for the long run. Advanced design, materials and robotic welding contribute to increased durability and overall machine strength.

Robust Structures

Your bottom line is improved by highly durable structures that achieve multiple life cycles and withstand the toughest loading conditions.

  • Full box-section rear frame resists torsional shock and twisting forces
  • Heavy-duty steering cylinder mounts efficiently transmit steering loads into the frame
  • Axle mounting has been optimized for increased structural integrity

Engine and Power Train

Cat Planetary Powershift Transmission

Building your success begins with a best-in-class transmission.

  • Consistent, smooth shifting and efficiency through integrated electronic controls that utilize Advanced Productivity Electronic Control System (APECS).
  • Long life and reliability through heat treat gear and metallurgy.
  • Three forward and three reverse speeds to match your application.
Engine and Emissions

The Cat C7.1 ACERT engine is designed for maximum fuel efficiency and increased power density. Two engine options are available to meet Tier 4 Final/Stage IV or Tier 3/Stage IIIA equivalent emission standards. This engine features innovative Cat electronics, fuel injection process, air-management systems and aftertreatment solution with Cat Selective Catalytic Reduction. While in operation, the aftertreatment will be seamless to the operator thanks to the passive regeneration system which is utilized.

Efficient Systems and Components

Innovative systems intelligently lower the average working engine speeds and reduce the overall system heat loads which result in significantly improved performance and fuel efficiency.

Advanced Systems with Innovative Integration

The deep system integration of the new engine and emissions system, power train, hydraulic system and cooling system result in lower fuel consumption on average compared to previous models.

Diesel Exhaust Fluid (DEF)

Cat engines equipped with an SCR system inject DEF into the exhaust to reduce NOx emissions. DEF is a precisely mixed solution of 32.5% high purity chemical grade urea and 67.5% de-ionized water. DEF used in Cat SCR systems must meet the requirements outlined in the International Organization for Standardization (ISO) standard 22241-1.

Next Generation Fuel Systems

Cat injection timing precisely controls the fuel injection process through a series of carefully timed microbursts, providing more control of combustion for the cleanest, most efficient fuel burn. On the 815K the high pressure common rail fuel systems boost performance and reduce soot for the C7.1 ACERT engine.

Cat NOx Reduction System

The Cat NOx Reduction System (NRS) captures and cools a small quantity of exhaust gas, then routes it back into the combustion chamber where it drives down combustion temperatures and reduces NOx emissions.

Aftertreatment Technologies

To meet the additional 80% reduction in NOx emissions required by Tier 4 Final/Stage IV emission standards, one new system, the Selective Catalytic Reduction (SCR), has been added to the already proven Cat Tier 4 Interim/Stage IIIB aftertreatment solution.

Tamping Wheels and Tips

Chevron Tamping Tip Design

The modified chevron tamping wheel tip design provides greater ground pressure, more compaction, excellent traction and a smooth ride.


Compaction is achieved from the bottom of the lift to the top. The tapered tips walk out of the lift without “fluffing” the soil. The top of the lift is compacted and the surface is relatively smooth and sealed so hauling units are able to maintain a high speed when traveling over the fill. The 815K travel speed allows four forces of compaction: pressure, manipulation, impact and vibration. Since the 815K can also spread fill, the number of spreader tractors may be able to be reduced.

Symmetrical Tamping Tip Pattern

Equal compaction in forward or reverse is the result of the symmetrical tamping tip pattern. Tips are full perimeter and replaceable. The tip is welded to a base assembly, which then is welded directly to the drum.

Cleaner Bars

Each wheel has two cleaner bars to keep the drums free of carryover dirt, regardless of rolling direction so efficiency is maximized. Cleaner bars are available with standard or abrasive tips depending upon the application.

Adjustable Cleaner Bar Tip

The adjustable cleaner bar tips are heat-treated and direct hardened, cutting edge steel to increase wear life, which translates into lower operating costs.

Operator Station

Your operators can work more efficiently and stay comfortable with our customer-inspired cab features.


Your operator's productivity is enhanced with our clean, comfortable cab environment.

  • Experience reduced vibrations from isolation cab mounts and seat air suspension
  • Maintain desired cab temperature with automatic temperature controls
  • Pressurized cab with filtered air
  • Reduced sound levels
  • Convenient floor storage tray/lunch box
Cat Comfort Series III Seat

Enhance comfort and help reduce operator fatigue with Cat Comfort Series III seat.

  • Mid back design and extra thick, contoured cushions
  • Air suspension system
  • Easy-to-reach seat levers and controls for six way adjustments
  • Seat-mounted implement pod and STIC steer that moves with the seat
  • 76 mm (3 in) wide retractable seat belt
Control Panel

Ergonomic placement of switches and information display keep your operators comfortable all day every day.

  • Large backlit membrane switches feature LED activation indicators
  • Switches feature ISO symbols for quick function identification
  • Two position rocker switch activates the electro hydraulic park brake
Steering and Transmission Integrated Control System (STIC™)

Enter and exit the cab easily and safely with a new fold up STIC armrest.

Experience maximum responsiveness and control with STIC that combines directional selection, gear selection and steering into a single lever.

  • Simple side-to-side motion turns machine right or left, minimizing operator movements
  • Easy to operate finger controlled gear selection
  • Smoother, faster cycles help reduce operator fatigue through the use of low effort integrated controls

Integrated Technologies

Cat Connect makes smart use of technology and services to improve your job site efficiency. Using the data from technology-equipped machines, you'll get more information and insight into your equipment and operations than ever before.

Cat Connect technologies offers improvements in these key areas: Equipment Management – increase uptime and reduce operating costs. Productivity – monitor production and manage job site efficiency. Safety – enhance job site awareness to keep your people and equipment safe.

COMPACT Technologies

COMPACT technologies combine advanced compaction measurement, in-cab guidance and reporting capabilities to help you consistently meet compaction targets fast, uniformly, and in fewer passes – saving on fuel and the cost of unnecessary rework.

Cat Compaction Control

The factory Cat Compaction Control system uses Machine Drive Power (MDP) technology to measure rolling resistance and correlates it with soil stiffness. MDP works in both cohesive or granular soils. Optional 3D mapping system maps compaction measurements to the precise location the operator is working, providing a real-time view of progress, and a record of compaction uniformity.

LINK Technologies

LINK technologies wirelessly connect you to your equipment, giving you valuable insight into how your machine or fleet is performing so you can make timely, fact-based decisions that can boost job site efficiency and productivity.

Product Link™/VisionLink®

Product Link is deeply integrated into your machine, giving you access to timely information like machine location, hours, fuel usage, idle time and event codes via the online VisionLink user interface can help you effectively manage your fleet and lower operating costs.

DETECT Technologies

DETECT technologies help keep people and equipment safe by enhancing operator awareness of the work area around working equipment and by monitoring and reporting unsafe conditions, like avoidance zones.

Rear Vision Camera

A rear vision camera greatly enhances visibility behind the machine to help the operator work more productively. Work with greater confidence and at peak potential while keeping people and assets safe.


We are constantly improving our products in an effort to provide a safe work environment for the operator and those who work on your job site.

Machine Access
  • Railings, ladders and non-slip surfaces enhance technician and operator safety
  • Maintain three points of contact at all times through ground level or platform accessible service areas
  • Rearview camera with in-cab monitor increases operator awareness around the machine
  • Standard cab mounted LED warning strobes
  • Optional heated mirrors ensure enhanced visibility for safe operation
  • Optional LED lights provide excellent workspace visibility
Operator Environment
  • Reduced vibrations to the operator with isolated cab mounts and seat mounted implement and steering controls
  • Low interior sound levels
  • Pressurized cab with filtered air
  • Standard 76 mm (3 in) seat belts on the operator seat


Reducing the Impact to the Environment

The 815K is an efficient, productive machine that's designed to conserve our natural resources for generations ahead.

  • Engine Idle Shutdown can help you save fuel by avoiding unnecessary idling.
  • Reduce waste to the environment with our maintenance free batteries.
  • The high speed oil change is standard and ensures fast, easy, and secure changing of the engine oil.
  • The 815K is built to be rebuilt with major structures and components capable of being remanufactured to reduce waste and replacement costs.


We can help you succeed by ensuring your 815K has design features to reduce your downtime.
  • Safe and convenient service with ground level or platform access to daily service points.
  • Swing-out doors on both sides of the engine compartment provide easy access to important daily service checks.
  • Ecology drains for ease of service and prevention of spills.
  • Reduce downtime with VIMS™ system notifications so your operators and technicians can resolve any problems before failure.
  • Quick visual inspection and minimize fluid contamination with sight gauges.
  • Hydraulic oil cooler, air conditioner condenser, and fuel cooler grouped together for ease of access.
  • Side access doors provided for cleanout of the cooling package.
  • A new ground level service area includes a Master Disconnect Switch with integrated lock-out/tag-out, DEF purge lamp (Tier 4 Final/Stage IV machines only), circuit breakers, emergency fuel shutoff switch and the jump start receptacle.
  • Centralized grease points for convenient maintenance.

Customer Support

Legendary Cat Dealer Support

A valued partner, your Cat dealer is available whenever you need them.

  • Preventive maintenance programs and guaranteed maintenance contracts
  • Best-in-class parts availability
  • Improve your efficiency with operator training
  • Genuine Cat Remanufactured parts

Operating Costs

Data from customer machines show Cat Soil Compactors are among the most fuel efficient machines in the industry. Several features contribute to this excellent fuel efficiency:

  • ACERT Engine – Advanced engine controls maximizes power and efficiency.
  • Engine Idle Shutdown – Automatic engine and electrical system shutdown conserves fuel.
  • Advanced Productivity Electronic Control System (APECS) – All new APECS transmission controls provides greater momentum on grades and fuel savings by carrying that momentum through the shift points.
  • Fuel Tank Capacity minimum of 12 hours operation depending on the application.

Standard Equipment:

Optional Equipment:

    Operator Environment
    • Camera, rear vision
    • Radio, CB (ready)
    Technology Products
    • Compaction control, basic
    Other Attachments
    • Sound suppression (required for Brazil)
    • Antifreeze, –50° C (–58° F)
    Starting Aids
    • Heater, engine coolant, 120V
    • Heater, engine coolant, 240V
    • Film (ANSI) (Tier 4 Final/Stage IV only)
    • EU certification (Tier 4 Final/Stage IV only)
    • Plate – year of manufacture (Tier 3/Stage IIIA equivalent only)