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844K Wheel Dozer

Cat Wheel Dozers are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Engineered for your demanding work in large dozing applications, the 844K Wheel Dozer is the largest in the Cat Wheel Dozer line and is an ideal match for large mining operations, power generating utilities, the general contracting industry and wherever mobility, versatility and compaction is needed.

Engine

Engine Model

C27 Cat®

Gross Power

752HP

Bore

5.4in

Stroke

6in

Displacement

1649.5in³

Torque Rise

18%

Net Power - SAE J1349 - Standard Ambient

699HP

Net Power - SAE J1349

699HP

Gross Power - ISO 14396

752HP

Net Power - SAE J1349 - High Ambient

648HP

Peak Torque - Speed

2624lb/ft

Emissions

U.S. EPA Tier 4 Final or Tier 2 Equivalent

Rated Speed

1800r/min

Gross Power - SAE J1995

766HP

Weights

Operating Weight

165089lb

Transmission

Converter Drive - Forward 1

4.5mile/h

Converter Drive - Forward 2

8.3mile/h

Converter Drive - Forward 3

14.2mile/h

Converter Drive - Reverse 1

4.9mile/h

Converter Drive - Reverse 2

9.1mile/h

Converter Drive - Reverse 3

15.5mile/h

Direct Drive - Forward 2

8.5mile/h

Direct Drive - Forward 3

15.2mile/h

Direct Drive - Reverse 1

5.4mile/h

Direct Drive - Reverse 2

9.6mile/h

Direct Drive - Reverse 3

16.4mile/h

Transmission Type

Cat Planetary Power Shift

Direct Drive - Forward 1

Lock-up disabled

Service Refill Capacities

Fuel Tank - Standard

286.6gal (US)

Cooling System

54.9gal (US)

Crankcase

20gal (US)

Transmission

29.1gal (US)

Differential - Final Drives - Front

71.6gal (US)

Differential - Final Drives - Rear

68.9gal (US)

Hydraulic System - Implement and Hydraulic Fan

68.9gal (US)

Hydraulic System - Steering and Braking

34.9gal (US)

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

8.5°

Brakes

Brakes

Meets ISO 3540:2011

Cab

Cab - ROPS/FOPS (1)

Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.

Air Conditioning

Standard air conditioning system contains environmentally friendly R134a refrigerant

ROPS

ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.

Cab - ROPS/FOPS (2)

SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994

FOPS

FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria.

Blade

Blade Capacity Range

15,9-30,7 m3 (20,7-40,2 yd.3)

Sound Performance - Standard

Machine Sound Level (ISO 6395:2008)

115dB(A)

Operator Sound Level (ISO 6396:2008)

69dB(A)

Sound Performance - Suppression

Machine Sound Level (ISO 6395:2008)

113dB(A)

Operator Sound Level (ISO 6396:2008)

69dB(A)

Hydraulic System - Lift/Tilt

Relief Valve Setting - Tilt Cylinders (Small Pump)

2920psi

Output at 2,000 rpm and 6900 kPa (1,000 psi)

82gal/min

Cylinders, Double Acting - Lift, Bore and Stroke

133 mm × 1535 mm (5.25 in × 60.4 in)

Relief Valve Setting - Bulldozer (Large Pump)

2700psi

Cylinder, Double Acting - Tilt and Tip, Bore and Stroke

210 mm × 188 mm (8.25 in × 7.4 in)

Hydraulic System - Steering

Total Steering Angle

35°

Steering System - Circuit

Pilot, load sensing

Minimum Turning Radius - Over Blade

34ft

Relief Valve Setting

4500psi

Steering System - Pump

Piston, variable displacement

Maximum Flow

94.3gal/min

Dimensions (Approximate)

Height - Top of Exhaust Pipe

16.6ft

Wheel Base

15.1ft

Length - With Blade on Ground

36.5ft

Centerline of Rear Axle to Edge of Bumper

12.5ft

Centerline of Front Axle to Hitch

7.5ft

Height - Top of ROPS

17.2ft

Ground Clearance

2ft

Height - Top of Hood

12.7ft

Standard Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Operator Environment
    • Air conditioner and heater with automatic temperature control
    • Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)
    • 12V power port for mobile phone or laptop connection
    • Camera, rear vision
    • Cigar lighter and ashtray
    • Coat hook
    • Electro-hydraulic blade controls (seat mounted)
    • Flip-up armrest
    • Heater and defroster
    • Horn, electric
    • Implement hydraulic lockout
    • Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature
    • Instrumentation, warning indicators: - Action alert system, three category - Automatic transmission model enable status - Brake malfunction - Bucket float status - Delayed engine shutdown status - Engine idle shutdown status - Engine malfunction - Fuel economy mode enable status - Hydraulic lockout - Lockup clutch enable status - Low fuel level - Parking brake status - Rimpull control enable status - Seatbelt warning - Secondary steering (if equipped) - Throttle lock status - Transmission gear
    • Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock
    • Light, dome (cab)
    • Lunchbox and beverage holders
    • Mirrors, rearview (externally mounted)
    • Seat, Cat comfort (cloth) air suspension
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC control system with steering lock
    • Tinted glass
    • Trainer seat with lap belt
    • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
    • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
  • Power Train
    • Brakes, full hydraulic, enclosed, oil-disc
    • Axle-shaft oil-disc service brake
    • Electro hydraulic parking brake
    • Case drain filters
    • Cat clean emission module (Tier 4 only)
    • Demand fan
    • Engine Cat C27
    • Fuel priming pump (electric)
    • Ground level engine shutoff, bumper
    • Mufflers (under hood) (Tier 2 only)
    • Precleaner, engine air intake
    • Radiator, Aluminum Modular (AMR)
    • Separated cooling system
    • Starting aid, (ether) manual override
    • Throttle Lock
    • Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system
    • Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
  • Electrical
    • Alarm, back-up
    • Alternator, 150 amp
    • Batteries, maintenance free (2 - 1,400 CCA)
    • Converter, 10/15 amp, 24V to 12V
    • Deutsch component connectors
    • Electrical system, 24V
    • Electronic transmission control
    • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
    • Starter, electric
    • Starter lockout in bumper
    • Starting receptacle for emergency start
    • Transmission lockout in bumper
  • Other
    • Axle temperature sensor
    • Battery disconnect and jump start receptacle, bumper
    • Coupling, Caterpillar O-ring face seals
    • Economy mode with on demand throttle
    • Emergency platform egress
    • Engine, crankcase, 500 hour interval with CH4
    • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
    • Fenders, steel (front)
    • Guards, crankcase and power train
    • Grouped/labeled lube points
    • Hitch, drawbar with pin
    • Hoses, Cat XT
    • Oil sampling valves
    • Positive flow control hydraulic system
    • Product Link
    • Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
    • Stairway, left and right rear access
    • Steering, load sensing
    • Steering, secondary
    • Toe kicks
    • Vandalism protection caplocks
    • Venturi stack
    • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)

Optional Equipment:

  • Note
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Power Train
    • 50° C (-58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling - software
  • Blades
    • Semi-U - 17.8 m3 (23.3 yd3)
    • HD Semi-U - 16.1 m3 (21.1 yd3)
    • Coal - 30.7 m3 (40.2 yd3)
  • Operator Environment
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with Bluetooth
    • LED warning strobe
    • CB radio ready
    • Window sun shade
  • Miscellaneous Attachments
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Axle oscillation stop
    • Paint, black blade rear

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