815K Soil Compactor

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 Model Cat® C7.1: configured for two emissions options
Net Power 248HP
Bore 4.1in
Stroke 5.3in
Displacement 427.8in³
Rated Power (SAE J1349) - Tier 3/Stage IIIA Equivalent 249HP
Maximum Net Torque - 1,400 rpm - Tier 3/Stage IIIA Equivalent 749lb/ft
Gross Power - ISO 14396 - Tier 4 Final/Stage IV 274HP
Rated Power (SAE J1349) - Tier 4 Final/Stage IV 248HP
Emissions 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
Rated Power (Net ISO 9249) - Tier 3/Stage IIIA equivalent 249HP
High Idle Speed 2270r/min
Gross Power - SAE J1995 - Tier 4 Final/Stage IV 284HP
Gross Power - ISO 14396 - Tier 3/Stage IIIA Equivalent 275HP
Low Idle Speed 800r/min
Gross Power - SAE J1995 - Tier 3/Stage IIIA Equivalent 286HP
Torque Rise - Tier 4 Final/Stage IV 52%
Maximum Net Torque - 1,400 rpm - Tier 4 Final/Stage IV 899lb/ft
Rated Power (Net ISO 9249) - Tier 4 Final/Stage IV 248HP
Maximum Altitude - Without Derating 9842.52ft
Torque Rise - Tier 3/Stage IIIA Equivalent 26%


Drum Width 3.25ft
Drum Diameter 3.38ft
Outside Diameter 4.63ft
Tips per Wheel 60
Width - Over Drums 10.64ft
Weight 9720lb


Front Planetary – Fixed
Rear Planetary – Oscillating
Oscillation Angle ±10 درجة


Maximum Depth of Cut 0.73ft
Maximum Lift Above Ground 2.63ft
Total Tilt Adjustment 2.14ft
Width - Over End Bits 12.34ft
Blade Tilt Adjustment - Left 1.14ft
Width - Moldboard Length 11.98ft
Blade Tilt Angle - Right - Hydraulic 4,8°
Blade Tilt Angle - Left - Hydraulic 5,5°
Height - Including Cutting Edge 2.82ft
Blade Tilt Adjustment - Right 1ft

Service Refill Capacities

Differential - Final Drives - Front 17.2gal (US)
Hydraulic Tank Only 19.8gal (US)
Cooling System - Tier 4 Final/Stage IV 21.4gal (US)
Fuel Tank 132.1gal (US)
Diesel Exhaust Fluid Tank (Tier 4 Final/Stage IV Only) 4.2gal (US)
Cooling System - Tier 3/Stage IIIA Equivalent 19.3gal (US)
Transmission 14.8gal (US)
Differential - Final Drives - Rear 17.2gal (US)
Engine Crankcase 5.3gal (US)
Note 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

Dimensions (Approximate)

Ground Clearance - Bumper 2.18ft
Ground Clearance 1.23ft
Turning Radius - Inside of Push Arms 8.27ft
Height - Top of Beacon 12.95ft
Height - Top of Hood 8.42ft
Height - Top of Cab Roof 11.98ft
Height - Top of Exhaust Pipe 10.97ft
Wheel Base 10.99ft
Width - Over Wheels 10.64ft
Centerline of Rear Axle to Bumper 6.53ft
Length - With Blade on Ground 23.48ft
Hitch to Centerline of Front Axle 5.5ft

Hydraulic System

Tilt Cylinder, Double Acting - Bore and Stroke 101.6 mm × 167 mm (4 in × 6.6 in)
Pump Flow at 2,111 rpm 23.5gal/min
Main Relief Pressure 3190psi
Maximum Supply Pressure 2930psi
Lift Cylinder, Double Acting - Bore and Stroke 101.6 mm × 627 mm (4 in × 24.7 in)

Hydraulic System - Steering

Vehicle Articulation Angle 84 degrees
Maximum System Flow 147 L/min @ 2,111 rpm (38.8 gal/min @ 2,111 rpm)
Steering Pressure Limited 4003psi
Bore 4in
Stroke 23.5in
Steering System - Circuit Closed Center Load Sensing
Steering System - Pump Piston – Variable Displacement

Operating Specifications

Operating Weight 49353lb
Maximum Operating Weight (Tier 3/Stage IIIA equivalent) 48740lb
Maximum Operating Weight (Tier 4 Final/Stage IV) 49353lb


Travel Speeds - Forward - Third 13.2mile/h
Travel Speeds - Reverse - Second 8.5mile/h
Travel Speeds - Forward - Second 7.5mile/h
Travel Speeds - Reverse - First 4.8mile/h
Travel Speeds - Forward - First 4.2mile/h
Travel Speeds - Reverse - Third 15mile/h
Transmission Type Planetengetriebe – Lastschaltgetriebe – ECPC (Electronic Clutch Pressure Control, Elektronische Kupplungsdrucksteuerung)

Cab - Suppression

Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent 110dB(A)
Machine Sound Level (ISO 6395) Tier 4/Stage IV 109dB(A)
Operator Sound Level - ISO 6396 70dB(A)

Cab - Standard

Operator Sound Level - ISO 6396 71dB(A)
Machine Sound Level (ISO 6395) Tier 3/Stage IIIA Equivalent 112dB(A)
Machine Sound Level (ISO 6395) Tier 4/Stage IV 111dB(A)

Braking System

Parking Brake Drum and Shoe, Spring Applied, Hydraulic Released

Standard Equipment

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • Advanced Productivity Electronic Control System (APECS)
    • Air to air aftercooler
    • Brakes, full hydraulic, enclosed, wet multiple disc service brakes
    • Cat clean emission module (Tier 4 Final/Stage IV only)
    • Electro-hydraulic parking brake
    • Electronic Clutch Pressure Control (ECPC)
    • Engine, Cat C7.1 (configured for two emissions options): – Tier 4 Final/Stage IV – Tier 3/Stage IIIA equivalent
    • Engine driven cooling fan – suction
    • Fuel priming pump (electric)
    • Fuel to air cooler
    • Ground level engine shutoff
    • Muffler (under hood) (Tier 3/Stage IIIA equivalent only)
    • Radiator, unit core
    • Starting aid (ether)
    • Throttle lock
    • Torque converter
    • Transmission, planetary, with 3F/3R speed range control
  • Electrical
    • Alarm, back-up
    • Alternator, 150 amp
    • Batteries, maintenance-free
    • Electrical system, 24V
    • Ground level lockable master disconnect switch
    • Lights, directional (rear)
    • Light, warning switched (LED strobe)
    • Lighting system, (front and rear)
    • Starter, electric
    • Starting receptacle for emergency start
  • Operator Environment
    • 12V power port for mobile phone or laptop connection
    • AccuGrade mapping (ready)
    • Air conditioner
    • Cab, sound-suppressed pressurized
    • Cab door, sliding window (LH)
    • Cat Compaction Control (ready)
    • Cat Detect: Object Detection (ready)
    • Coat and hard hat hooks
    • Finger tip shifting controls
    • Flip-up armrest
    • Heater and defroster
    • Horn, electric
    • Hydraulic controls – seat mounted
    • Implement hydraulic lockout
    • Instrumentation, gauges: – DEF fluid level (Tier 4 Final/Stage IV only) – Engine coolant temperature – Fuel level – Hydraulic oil temperature – Speedometer/tachometer – Torque converter temperature
    • Instrumentation, warning indicators: – Action alert system, three categories – Brake oil pressure – Electrical system, low voltage – Engine failure malfunction alert and action lamp – Parking brake status
    • Light, (dome) cab
    • Lunch box and beverage holders
    • Mirror, internal (panoramic)
    • Mirrors, rearview (externally mounted)
    • Radio ready for entertainment: – Antenna – Speakers – Converter (12V, 10-15 amp)
    • Seat, Cat Comfort (cloth) air suspension
    • Seat belt with minder, retractable, 76 mm (3 in) wide
    • STIC control system with lockout
    • Sun visor, front
    • Tinted glass
    • Transmission gear (indicator)
    • Vital Information Management System (VIMS): – Graphical information display – External data port – Customizable operator profiles – Event indicator light on rear grill
    • Wet-arm wipers/washers (front and rear): – Intermittent wipers (front and rear)
  • Tires, Rims And Wheels
    • Wheels, tamping foot
  • Guards
    • Cleaner bars with teeth
    • Guards, crankcase and power train
    • Guard, driveshaft
  • Fluids
    • Antifreeze, premixed 50% concentration extended life (–34° C/–29° F)
  • Other Standard Equipment
    • DEF tank fill gauge
    • Doors, service access (locking)
    • Ecology drains for engine, radiator, transmission, hydraulic tank
    • Engine, crankcase, 500 hour interval with CJ-4 oil
    • Emergency platform egress
    • Fire suppression ready
    • Fuel tank, 500 L (132.1 gal)
    • Hitch, drawbar with pin
    • Hoses, Cat XT
    • Hydraulic, engine, and transmission oil coolers
    • Oil change system, high speed
    • Oil sampling valves
    • Steering, load sensing
    • Total hydraulic filtration system
    • Vandalism protection caplocks
    • Venturi stack
  • Standard Attachments – Hydraulics
    • Hydraulics: – Standard or EU and Canada
  • Standard Attachments – Operator Environment
    • Glass (window): – Standard bonded or rubber-mounted glass
    • Precleaner – cab: – Standard or powered
    • Seat – cab: – Standard or heated and ventilated
    • Mirrors – cab: – Standard or heated
  • Standard Attachments – Power Train
    • Axles: – Standard or non-spin rear
  • Standard Attachments – Special Arrangements
    • Engine Precleaners: – Turbine or dual stage
  • Standard Attachments – Electrical
    • Lights: – Standard or LED
  • Standard Attachments – Fuel Systems
    • Fuel tank: – Non-fast or fast fill
  • Standard Attachments – Technology Products
    • Product Link: – GSM, satellite
  • Standard Attachments – Cleaner Bars
    • Cleaner bars: – Standard or abrasive
  • Standard Attachments – Blades
    • Blades: – Straight or tilt-straight

Optional Equipment

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Operator Environment
    • Camera, rear vision
    • Radio, CB (ready)
  • Technology Products
    • Compaction control, basic
  • Other Attachments
    • Sound suppression (required for Brazil)
  • Fluids
    • Antifreeze, –50° C (–58° F)
  • Starting Aids
    • Heater, engine coolant, 120V
    • Heater, engine coolant, 240V
  • Miscellaneous
    • 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)