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Designed with durability built in, the Cat 825K ensures maximum availability through multiple life cycles. Designed and manufactured for optimum performance and serviceability, this rugged, powerful machine delivers heavy-duty compaction and dozing.


Engine Model Cat® C15 ACERT™ Cat® C15 ACERT™ Less
Net Power 405.0 HP 302.0 kW Less
Bore 5.4 in 137.2 mm Less
Displacement 927.6 in³ 15.2 l Less
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 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 Less
Gross Power 435.0 HP 324.0 kW Less
High Idle Speed 2300.0 r/min 2300.0 r/min Less
Low Idle Speed 800.0 r/min 800.0 r/min Less
Maximum Altitude - Without Derating (Tier 3 Final/Stage IIIA Equivalent) 9098.0 ft 2773.0 m Less
Maximum Altitude - Without Derating (Tier 4 Final/Stage IV) 9298.0 ft 2834.0 m Less
Maximum Net Torque - 1,300 rpm 1478.8 lb/ft 2005.0 N·m Less
Net Power - Converter Drive - Gross Power 435.0 HP 324.0 kW Less
Net Power - Converter Drive - Torque Rise 8.5% 8.5% Less
Net Power - Direct Drive - Gross Power 412.0 HP 307.0 kW Less
Net Power - Direct Drive - Torque Rise 33% 33% Less
Rated Power (Net ISO 9249) 405.0 HP 302.0 kW Less
Rated Power (Net SAE J1349) 405.0 HP 302.0 kW Less
Stroke 6.7 in 171.4 mm Less

Operating Specifications

Operating Weight 78326.0 lb 35528.0 kg Less
Operating Weight - Tier 3 Final/Stage IIIA Equivalent 77340.0 lb 35081.0 kg Less
Operating Weight - Tier 4 Final/Stage IV 78326.0 lb 35528.0 kg Less


Front Planetary – Fixed Planetary – Fixed Less
Oscillation Angle ±8° ±8° Less
Rear Planetary – Oscillating Planetary – Oscillating Less


Blade Tilt Angle - Left - Hydraulic 5.4° 5.4° Less
Blade Tilt Angle - Left - Mechanical 4.1° 4.1° Less
Blade Tilt Angle - Left Full 10.1° 10.1° Less
Blade Tilt Angle - Right - Hydraulic 6.3° 6.3° Less
Blade Tilt Angle - Right - Mechanical 5.1° 5.1° Less
Blade Tilt Angle - Right Full 10.8° 10.8° Less
Blade Tip Angle - Back 7.5° 7.5° Less
Blade Tip Angle - Forward 7.3° 7.3° Less
Blade Tip Angle - Total 14.8° 14.8° Less
Height - Including Cutting Edge 3.4 ft 1032.0 mm Less
Maximum Depth of Cut 1.97 ft 602.0 mm Less
Maximum Lift Above Ground 3.14 ft 958.0 mm Less
Moldboard - Length 14.4 ft 4390.0 mm Less
Total Tilt Adjustment 2.9 ft 890.0 mm Less
Width - Over End Bits 15.18 ft 4628.0 mm Less


Parking Brake Drum and Shoe, Spring Applied, Hydraulic Released Drum and Shoe, Spring Applied, Hydraulic Released Less

Cab - Standard

Machine Sound Level (ISO 6395) 113.0 dB(A) 113.0 dB(A) Less
Operator Sound Level - ISO 6396 73.0 dB(A) 73.0 dB(A) Less

Cab - Suppression

Machine Sound Level (ISO 6395) 110.0 dB(A) 110.0 dB(A) Less
Operator Sound Level - ISO 6396 72.0 dB(A) 72.0 dB(A) Less

Dimensions (Approximate)

Centerline of Rear Axle to Edge of Counterweight 9.3 ft 2830.0 mm Less
Ground Clearance 1.6 ft 492.0 mm Less
Ground Clearance - Bumper 2.7 ft 810.0 mm Less
Height - ROPS/Canopy 13.3 ft 4059.0 mm Less
Height - Top of Beacon 14.4 ft 4381.0 mm Less
Height - Top of Exhaust Pipe 14.1 ft 4290.0 mm Less
Height - Top of Hood 10.4 ft 3162.0 mm Less
Hitch to Centerline of Front Axle 6.1 ft 1850.0 mm Less
Length - With Blade on Ground 28.1 ft 8561.0 mm Less
Turning Radius - Inside of Push Arms 8.6 ft 2627.0 mm Less
Wheel Base 12.1 ft 3700.0 mm Less
Width - Over Wheels 11.98 ft 3650.0 mm Less

Hydraulic System

Cylinders, Double Acting - Lift, Bore and Stroke 120 mm × 1070 mm (4.7 in × 42.1 in) 120 mm × 1070 mm (4.7 in × 42.1 in) Less
Cylinders, Double Acting - Tilt, Bore and Stroke 95.25 mm × 216 mm (3.75 in × 8.5 in) 95.25 mm × 216 mm (3.75 in × 8.5 in) Less
Main Relief Pressure 3495.0 psi 24100.0 kPa Less
Maximum Supply Pressure 3495.0 psi 24100.0 kPa Less
Pump Flow at 1,800 rpm 30.9 gal/min 117.0 l/min Less

Hydraulic System - Steering

Bore 4.5 in 114.3 mm Less
Maximum System Flow 170 L/min @ 1,800 rpm (44.9 gal/min @ 1,800 rpm) 170 L/min @ 1,800 rpm (44.9 gal/min @ 1,800 rpm) Less
Steering Pressure Limited 3481.0 psi 24000.0 kPa Less
Steering System - Circuit Double Acting – End Mounted Double Acting – End Mounted Less
Steering System - Pump Piston – Variable Displacement Piston – Variable Displacement Less
Stroke 22.7 in 576.0 mm Less
Vehicle Articulation Angle 86 degrees 86 degrees Less

Service Refill Capacities

Cooling System 30.6 gal (US) 116.0 l Less
Diesel Exhaust Fluid Tank (Tier 4 Final/Stage IV) 8.5 gal (US) 32.0 l Less
Differential - Final Drives - Front 26.4 gal (US) 100.0 l Less
Differential - Final Drives - Rear 29.1 gal (US) 110.0 l Less
Engine Crankcase 9.0 gal (US) 34.0 l Less
Fuel Tank 206.6 gal (US) 782.0 l Less
Hydraulic Tank Only 35.4 gal (US) 134.0 l Less
Transmission 17.4 gal (US) 66.0 l Less


Transmission Type Planetary – Powershift – ECPC Planetary – Powershift – ECPC Less
Travel Speeds - Forward - First 3.4 mile/h 5.5 km/h Less
Travel Speeds - Forward - Second 6.0 mile/h 9.7 km/h Less
Travel Speeds - Forward - Third 10.7 mile/h 17.2 km/h Less
Travel Speeds - Reverse - First 3.9 mile/h 6.2 km/h Less
Travel Speeds - Reverse - Second 6.9 mile/h 11.1 km/h Less
Travel Speeds - Reverse - Third 12.2 mile/h 19.7 km/h Less


Drum Diameter 4.3 ft 1299.0 mm Less
Drum Width 3.7 ft 1125.0 mm Less
Outside Diameter 5.5 ft 1672.0 mm Less
Tips per Wheel 65 65 Less
Weight 16167.0 lb 7333.0 kg Less
Width - Over Drums 11.98 ft 3650.0 mm Less


  • Auto shift mode, when active, allows machine to upshift or downshift based on machine speed and torque, optimizing performance and saving fuel.
  • The left pedal acts as a brake, transmission neutralizer and an engine decelerator to override the engine speed selected by the throttle lock. Operators can slow down when the throttle lock is engaged and to return to throttle lock without pressing a resume or set button. Helps maneuvering around trucks, tractors or other obstacles.
  • Steering and Transmission Integrated Control System (STIC™) enhances operator comfort by integrating steering and transmission control functions in a single lever. Includes finger-controlled gear selection.
  • Load sensing hydraulic steering system ensures smooth steering at all speeds and engine levels.
  • Variable displacement piston pumps enhance efficiency.
  • Steering articulates 43 degrees each direction allowing operators precise positioning for easy operation in tight areas.
  • Electro hydraulic controls help ensure responsive, predictable implement control.
  • Electronically controlled hydraulic cylinder stops deliver smooth machine operation, less stress on operator.


  • Designed and made with purpose-built structures to remain safe and durable for the long run.
  • Long-life-designs, materials and robotic welding ensure multiple life cycles and ability to withstand the toughest conditions.
  • Full box-section rear frame resists torsional shock and twisting forces.
  • Heavy-duty steering-cylinder mounts efficiently conduct steering loads into the frame.


  • Single Clutch Speed Shifting (SCSS) delivers consistent, smooth shifting and efficiency.
  • Strategic use of metallurgy and heat treating ensures long-life gears.
  • Torque converter with lock-up clutch eliminates drive losses, reduces system heat, improves travel speeds, and increases fuel efficiency.
  • Cat C15 engine is built and tested to meet your most demanding applications.
  • Two engine options are available to meet Tier 4 Final/Stage IV or Tier 3/Stage IIIA equivalent emission standards. (depending upon market).
  • Fully integrated electronic engine controls work in concert with the entire machine to make fuel go farther.
  • Engine Idle Shutdown reduces fuel waste during idling periods.
  • Delayed Engine Shutdown maximizes durability.


  • Chevron Tamping 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 825K travel speed delivers four forces of compaction: pressure, manipulation, impact and vibration.
  • This compactor also spreads fill, potentially reducing the number of spreader tractors needed for the project.
  • Symmetrical tamping tip pattern delivers equal compaction in forward or reverse. Tips are full perimeter and replaceable.
  • Two cleaner bars on each wheel keep drums free of carryover dirt, in forward and reverse, maximizing efficiency. Cleaner bars are available with standard or abrasive tips depending upon the application. Bars are adjustable and bar tips are heat-treated and direct-hardened cutting-edge steel to increase life.


  • Pressurized cab sits on isolation mounts improving comfort and reducing sound.
  • Cab features a convenient floor storage tray/lunch box.
  • Cat Comfort Series III Seat includes mid-back design, thick, contoured cushions, air suspension, six-way adjustments, and a seat-mounted implement pod and STIC steer that moves with the seat for optimal control.
  • Control panel gives operators the information and controls for safer and time-saving settings.
  • STIC control simplicity provides maximum responsiveness and control with STIC that combines directional selection, gear selection and steering into a single lever.


  • 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.
  • DETECT technologies help keep people and equipment safe by keeping operator aware of the work area and by monitoring and reporting unsafe conditions, like avoidance zones.
  • COMPACT technologies combine advanced compaction measurement, in-cab guidance and reporting capabilities to help you consistently meet compaction targets fast, uniformly, and with fewer passes.
  • Cat Product Link is deeply integrated into your machine, giving you access to information like machine location, hours, fuel usage, idle time and event codes via the online VisionLink user interface. Helps effectively manage fleet and lower operating costs.


  • Railings, ladders and non-slip surfaces enhance technician and operator safety.
  • Design ensures 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.
  • 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.


  • Engine Idle Shutdown saves fuel by avoiding unnecessary idling.
  • Reduce waste to the environment with maintenance-free batteries.
  • The 825K is built to be rebuilt, maximizing machine life, and minimizing environmental impact. Get the most from your investment, with our sustainable options including Cat Reman and Certified Rebuild programs. With these programs, remanufactured components deliver cost savings of 40 to 70 percent, lowering operating costs while also reducing waste and minimizing the need for raw materials.


  • Safe and convenient service via ground level or platform access to daily service points.
  • Swing-out doors on both sides of engine compartment provide easy access to daily service checks.
  • Ecology drains for ease of service and prevention of spills.
  • Reduce downtime with VIMS™ system notifications so operators and technicians can resolve problems before failure.
  • Sight gauges mean quick visual inspection and minimize fluid contamination.
  • Swing-out doors on both sides provide convenient access to daily service check points. Engine compartment lighting aids visibility.
  • New ground level service area includes an electrical disconnect, emergency engine shutdown and stairway light switch.
  • Cat dealers keep you running with preventive maintenance programs, maintenance contracts, best-in-class parts availability and operator training support.

825K Standard Equipment

  • Air to air aftercooler
  • Autoshift
  • Brakes, full hydraulic, enclosed, wet multiple disc service brakes
  • Cat clean emission module (Tier 4 Final/Stage IV)
  • Electro-hydraulic parking brake
  • Electronic Clutch Pressure Control (ECPC)
  • Engine, Cat C15 with ACERT Technology: – Tier 4 Final/Stage IV – Tier 3/Stage IIIA equivalent
  • Fuel priming pump (electric)
  • Fuel to air cooler
  • Ground level engine shutoff
  • Hydraulically driven demand fan
  • Integrated braking system
  • Muffler (under hood) (Tier 3/Stage IIIA equivalent)
  • Radiator, Aluminum Modular (AMR)
  • Separated cooling system
  • Single Clutch Speed Shifting (SCSS)
  • Starting aid (ether) automatic
  • Throttle lock
  • Torque converter with Lock Up Clutch (LUC)
  • Transmission, planetary, with 3F/3R speed range control

  • Alarm, back-up
  • Alternator, 150 amp
  • Batteries, maintenance-free (4 – 1,000 CCA)
  • Electrical system, 24V
  • Ground level lockable master disconnect switch
  • Light, warning unswitched (LED strobe)
  • Lighting, access stairway
  • Lighting, under hood
  • Lighting system, halogen (front and rear)
  • Lights, directional (rear)
  • Starter, electric (heavy duty)
  • Starting receptacle for emergency start

  • 12V power port for mobile phone or laptop connection
  • AccuGrade™ mapping (ready)
  • Air conditioner
  • Cab, sound-suppressed pressurized
  • Cab door, sliding window (LH)
  • Compaction control (ready)
  • Coat and hard hat hooks
  • Electro-hydraulic tilt and lift controls
  • Finger tip shifting controls
  • Flip-up armrest
  • Heater and defroster
  • Horn, electric
  • Implement hydraulic lockout
  • Instrumentation, gauges: – DEF fluid level (Tier 4 Final/Stage IV) – 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
  • Internal four-post rollover protective structure (ROPS/FOPS)
  • Laminated glass
  • Light, (dome) cab
  • Lunch box and beverage holders
  • Mirror, internal (panoramic)
  • Mirrors, heated ready
  • 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
  • Wet-arm wipers/washers (front and rear)
  • Intermittent wipers (front and rear)

  • Wheels, tamping tips

  • Guard, driveshaft
  • Guards, crankcase and power train

  • Bulldozer straight blade, hydraulics, and linkage are included in the base machine

  • Antifreeze, premixed 50% concentration extended life (–34° C/–29° F)

  • Cleaner bars with teeth
  • Doors, service access (locking)
  • Ecology drains for engine, radiator, transmission, hydraulic tank
  • Emergency platform egress
  • Engine, crankcase, 500 hour interval with CJ-4 oil
  • Engine idle management features: – Auto idle kickdown – Delayed engine shutdown – Engine idle shutdown
  • Fast fuel system
  • Fire suppression ready
  • Fuel tank, Fast Fill, 782 L (207 gal)
  • Hitch, drawbar with pin
  • Hoses, Cat
  • Hydraulic, engine, and transmission oil coolers
  • Oil change system, high speed
  • Oil sampling valves
  • Product Link
  • Stairway, left and right rear access
  • Steering, load sensing
  • Toe kicks
  • Total hydraulic filtration system
  • Vandalism protection caplocks
  • Venturi stack
  • Fold down exhaust stack for shipping

825K Optional Equipment

  • Camera, rear vision
  • Radio, CB (ready)

  • Compaction control, basic

  • Antifreeze, –50° C (–58° F)

  • Heater, engine coolant, 120V
  • Heater, engine coolant, 240V

  • Film (ANSI) (Tier 4 Final/Stage IV)
  • EU certification (Tier 4 Final/Stage IV)
  • Plate – year of manufacture (Tier 3/Stage III Equivalent)

Swear by Equipment Management

Fuel costs. Labor costs. Maintenance costs. They can all tax your patience. But with timely, accurate data, you can better manage your equipment to keep operating expenses in line. Cat® EMSolutions offers everything you need to control costs, help your guys work better, reduce risks and get more done every day.

See How