New | 825K 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 825K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.

Engine ModelCat® C15 ACERT™
Net Power405 mm H2O
Bore5.4 in
Displacement927.6 in³
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 Power435 mm H2O
High Idle Speed2300 r/min
Low Idle Speed800 r/min
Maximum Altitude - Without Derating (Tier 3 Final/Stage IIIA Equivalent)9098 ft
Maximum Altitude - Without Derating (Tier 4 Final/Stage IV)9298 ft
Maximum Net Torque - 1,300 rpm1478.8 lb/ft
Net Power - Converter Drive - Gross Power435 mm H2O
Net Power - Converter Drive - Torque Rise8.5%
Net Power - Direct Drive - Gross Power412 mm H2O
Net Power - Direct Drive - Torque Rise33%
Rated Power (Net ISO 9249)405 mm H2O
Rated Power (Net SAE J1349)405 mm H2O
Stroke6.7 in
Operating Specifications
Operating Weight78326 lb
Operating Weight - Tier 3 Final/Stage IIIA Equivalent77340 lb
Operating Weight - Tier 4 Final/Stage IV78326 lb
FrontPlanetary – Fixed
Oscillation Angle±8°
RearPlanetary – Oscillating
Blade Tilt Angle - Left - Hydraulic5.4°
Blade Tilt Angle - Left - Mechanical4.1°
Blade Tilt Angle - Left Full10.1°
Blade Tilt Angle - Right - Hydraulic6.3°
Blade Tilt Angle - Right - Mechanical5.1°
Blade Tilt Angle - Right Full10.8°
Blade Tip Angle - Back7.5°
Blade Tip Angle - Forward7.3°
Blade Tip Angle - Total14.8°
Height - Including Cutting Edge3.4 ft
Maximum Depth of Cut1.97 ft
Maximum Lift Above Ground3.14 ft
Moldboard - Length14.4 ft
Total Tilt Adjustment2.9 ft
Width - Over End Bits15.18 ft
Parking BrakeDrum and Shoe, Spring Applied, Hydraulic Released
Cab - Standard
Machine Sound Level (ISO 6395)113 dB(A)
Operator Sound Level - ISO 639673 dB(A)
Cab - Suppression
Machine Sound Level (ISO 6395)110 dB(A)
Operator Sound Level - ISO 639672 dB(A)
Dimensions (Approximate)
Centerline of Rear Axle to Edge of Counterweight9.3 ft
Ground Clearance1.6 ft
Ground Clearance - Bumper2.7 ft
Height - ROPS/Canopy13.3 ft
Height - Top of Beacon14.4 ft
Height - Top of Exhaust Pipe14.1 ft
Height - Top of Hood10.4 ft
Hitch to Centerline of Front Axle6.1 ft
Length - With Blade on Ground28.1 ft
Turning Radius - Inside of Push Arms8.6 ft
Wheel Base12.1 ft
Width - Over Wheels11.98 ft
Hydraulic System
Cylinders, Double Acting - Lift, Bore and Stroke120 mm × 1070 mm (4.7 in × 42.1 in)
Cylinders, Double Acting - Tilt, Bore and Stroke95.25 mm × 216 mm (3.75 in × 8.5 in)
Main Relief Pressure3495 psi
Maximum Supply Pressure3495 psi
Pump Flow at 1,800 rpm30.9 gal/min
Hydraulic System - Steering
Bore4.5 in
Maximum System Flow170 L/min @ 1,800 rpm (44.9 gal/min @ 1,800 rpm)
Steering Pressure Limited3481 psi
Steering System - CircuitDouble Acting – End Mounted
Steering System - PumpPiston – Variable Displacement
Stroke22.7 in
Vehicle Articulation Angle86 degrees
Service Refill Capacities
Cooling System30.6 gal (US)
Diesel Exhaust Fluid Tank (Tier 4 Final/Stage IV)8.5 gal (US)
Differential - Final Drives - Front26.4 gal (US)
Differential - Final Drives - Rear29.1 gal (US)
Engine Crankcase9 gal (US)
Fuel Tank206.6 gal (US)
Hydraulic Tank Only35.4 gal (US)
Transmission17.4 gal (US)
Transmission TypePlanetary – Powershift – ECPC
Travel Speeds - Forward - First3.4 mile/h
Travel Speeds - Forward - Second6 mile/h
Travel Speeds - Forward - Third10.7 mile/h
Travel Speeds - Reverse - First3.9 mile/h
Travel Speeds - Reverse - Second6.9 mile/h
Travel Speeds - Reverse - Third12.2 mile/h
Drum Diameter4.3 ft
Drum Width3.7 ft
Outside Diameter5.5 ft
Tips per Wheel65
Weight16167 lb
Width - Over Drums11.98 ft
  • Efficiency And Productivity
  • Efficiency And Productivity
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  • Efficiency And Productivity
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  • Structures
  • Structures
  • Power Train
  • Power Train
  • Power Train
  • Tamping Wheels And Tips
  • Tamping Wheels And Tips
  • Tamping Wheels And Tips
  • Tamping Wheels And Tips
  • Tamping Wheels And Tips
  • Tamping Wheels And Tips
  • Operator Station
  • Operator Station
  • Operator Station
  • Operator Station
  • Operator Station
  • Integrated Technologies
  • Integrated Technologies
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  • Safety
  • Safety
  • Safety
  • Safety
  • Sustainability
  • Serviceability
  • Customer Support
  • Operating Costs

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

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)


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