Intelligent Compaction Intelligent Compaction
Cat® 815K Soil Compactor Structures Cat® 815K Soil Compactor Structures
Cat® 815K Soil Compactor Serviceability Cat® 815K Soil Compactor Serviceability
Cat® 815K Soil Compactor Productivity Cat® 815K Soil Compactor Productivity


Engine ModelCat® C7.1 ACERT™: configured for two emissions options
Net Power248 HP (185 kW)
Bore4.1 in (105 mm)
Stroke5.3 in (135 mm)
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 more efficiently and safely. Representing a long-standing commitment to quality and performance, this rugged, powerful machine is designed and built for heavy-duty compaction and dozing operations. Focused on helping our customers succeed, we have continued to build upon each new series. The 815K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.


Engine ModelCat® C7.1 ACERT™: configured for two emissions options
Net Power248 HP (185 kW)
Bore4.1 in (105 mm)
Stroke5.3 in (135 mm)
Displacement427.8 in³ (7.01 l)
Drum Width3.25 ft (991 mm)
Drum Diameter3.38 ft (1029 mm)
Outside Diameter4.63 ft (1412 mm)
Tips per Wheel60
FrontPlanetary – Fixed
RearPlanetary – Oscillating
Maximum Depth of Cut0.73 ft (222 mm)
Maximum Lift Above Ground2.63 ft (802 mm)
Total Tilt Adjustment2.14 ft (651 mm)
Width - Over End Bits12.34 ft (3761 mm)
Oscillation Angle±10°
Blade Tilt Adjustment - Left1.14 ft (346 mm)
Blade Tilt Adjustment - Right1 ft (305 mm)
Blade Tilt Angle - Left - Hydraulic5.5°
Blade Tilt Angle - Right - Hydraulic4.8°
Height - Including Cutting Edge2.82 ft (860 mm)
Width - Moldboard Length11.98 ft (3652 mm)
Parking BrakeDrum and Shoe, Spring Applied, Hydraulic Released
Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent112 dB(A) (112 dB(A))
Machine Sound Level (ISO 6395) Tier 4/Stage IV111 dB(A) (111 dB(A))
Operator Sound Level - ISO 639671 dB(A) (71 dB(A))
Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent110 dB(A) (110 dB(A))
Machine Sound Level (ISO 6395) Tier 4/Stage IV109 dB(A) (109 dB(A))
Operator Sound Level - ISO 639670 dB(A) (70 dB(A))
Centerline of Rear Axle to Bumper6.53 ft (1990 mm)
Ground Clearance1.23 ft (375 mm)
Ground Clearance - Bumper2.18 ft (665 mm)
Height - Top of Beacon12.95 ft (3946 mm)
Height - Top of Cab Roof11.98 ft (3650 mm)
Height - Top of Exhaust Pipe10.97 ft (3344 mm)
Height - Top of Hood8.42 ft (2566 mm)
Hitch to Centerline of Front Axle5.5 ft (1675 mm)
Length - With Blade on Ground23.48 ft (7157 mm)
Turning Radius - Inside of Push Arms8.27 ft (2520 mm)
Wheel Base10.99 ft (3350 mm)
Width - Over Wheels10.64 ft (3243 mm)
EmissionsMeets U.S. EPA Tier 4 Final/EU Stage IV emission standards or meets U.S. EPA Tier 3/EU Stage IIIA equivalent emission standards
Gross Power - ISO 14396 - Tier 3/Stage IIIA Equivalent275 HP (205 kW)
Gross Power - ISO 14396 - Tier 4 Final/Stage IV274 HP (204 kW)
Gross Power - SAE J1995 - Tier 3/Stage IIIA Equivalent286 HP (213 kW)
Gross Power - SAE J1995 - Tier 4 Final/Stage IV284 HP (212 kW)
High Idle Speed2270 r/min (2270 r/min)
Low Idle Speed800 r/min (800 r/min)
Maximum Altitude - Without Derating9842.52 ft (3000 m)
Maximum Net Torque - 1,400 rpm - Tier 3/Stage IIIA Equivalent749 lb/ft (1016 N·m)
Maximum Net Torque - 1,400 rpm - Tier 4 Final/Stage IV899 lb/ft (1219 N·m)
Rated Power (Net ISO 9249) - Tier 3/Stage IIIA equivalent249 HP (186 kW)
Rated Power (Net ISO 9249) - Tier 4 Final/Stage IV248 HP (185 kW)
Rated Power (SAE J1349) - Tier 3/Stage IIIA Equivalent249 HP (186 kW)
Rated Power (SAE J1349) - Tier 4 Final/Stage IV248 HP (185 kW)
Torque Rise - Tier 3/Stage IIIA Equivalent26%
Torque Rise - Tier 4 Final/Stage IV52%
Lift Cylinder, Double Acting - Bore and Stroke101.6 mm × 627 mm (4 in × 24.7 in)
Main Relief Pressure3190 psi (22000 kPa)
Maximum Supply Pressure2930 psi (20200 kPa)
Pump Flow at 2,111 rpm23.5 gal/min (89 l/min)
Tilt Cylinder, Double Acting - Bore and Stroke101.6 mm × 167 mm (4 in × 6.6 in)
Bore4 in (101.6 mm)
Maximum System Flow147 L/min @ 2,111 rpm (38.8 gal/min @ 2,111 rpm)
Steering Pressure Limited4003 psi (27600 kPa)
Steering System - CircuitClosed Center Load Sensing
Steering System - PumpPiston – Variable Displacement
Stroke23.5 in (597 mm)
Vehicle Articulation Angle84 degrees
Maximum Operating Weight (Tier 3/Stage IIIA equivalent)48740 lb (22108 kg)
Maximum Operating Weight (Tier 4 Final/Stage IV)49353 lb (22386 kg)
Operating Weight49353 lb (22386 kg)
Cooling System - Tier 3/Stage IIIA Equivalent19.3 gal (US) (73 l)
Cooling System - Tier 4 Final/Stage IV21.4 gal (US) (81 l)
Diesel Exhaust Fluid Tank (Tier 4 Final/Stage IV Only)4.2 gal (US) (16 l)
Differential - Final Drives - Front17.2 gal (US) (65 l)
Differential - Final Drives - Rear17.2 gal (US) (65 l)
Engine Crankcase5.3 gal (US) (20 l)
Fuel Tank132.1 gal (US) (500 l)
Hydraulic Tank Only19.8 gal (US) (75 l)
NoteAll 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 EPA and 10 ppm for EU (mg/kg) sulfur or less ULSD and when the biodiesel feedstock meets ASTM D7467 specifications. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Diesel Exhaust Fluid (DEF) that meets all requirements defined in ISO 22241-1.
Transmission14.8 gal (US) (56 l)
Transmission TypePlanetary – Powershift – ECPC
Travel Speeds - Forward - First4.2 mile/h (6.7 km/h)
Travel Speeds - Forward - Second7.5 mile/h (12 km/h)
Travel Speeds - Forward - Third13.2 mile/h (21.2 km/h)
Travel Speeds - Reverse - First4.8 mile/h (7.7 km/h)
Travel Speeds - Reverse - Second8.5 mile/h (13.7 km/h)
Travel Speeds - Reverse - Third15 mile/h (24.2 km/h)
Weight9720 lb (4409 kg)
Width - Over Drums10.64 ft (3243 mm)

Benefits and Features

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

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.

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.

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

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.

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

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

  • Advanced Productivity Electronic Control System (APECS)
  • Alarm, back-up
  • 12V power port for mobile phone or laptop connection
  • Wheels, tamping foot
  • Cleaner bars with teeth
  • Antifreeze, premixed 50% concentration extended life (–34° C/–29° F)
  • DEF tank fill gauge
  • Hydraulics: – Standard or EU and Canada
  • Glass (window): – Standard bonded or rubber-mounted glass
  • Axles: – Standard or non-spin rear
  • Engine Precleaners: – Turbine or dual stage
  • Lights: – Standard or LED
  • Fuel tank: – Non-fast or fast fill
  • Product Link: – GSM, satellite
  • Cleaner bars: – Standard or abrasive
  • Blades: – Straight or tilt-straight

Optional Equipment

  • Camera, rear vision
  • Compaction control, basic
  • Sound suppression (required for Brazil)
  • Antifreeze, –50° C (–58° F)
  • Heater, engine coolant, 120V
  • Film (ANSI) (Tier 4 Final/Stage IV only)