844K Wheel Dozer
360° Exterior View
360° Interior View
At a Glance
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Overview
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 | Cat® C27 ACERT™ |
| Gross Power | 752HP |
| Bore | 5.4in |
| Stroke | 6in |
| Displacement | 1649.5in³ |
| Torque Rise | 18% |
| Emissions | U.S. EPA Tier 4 Final or Tier 2 Equivalent |
| Gross Power - ISO 14396 | 752HP |
| Gross Power - SAE J1995 | 766HP |
| Net Power - SAE J1349 | 699HP |
| Net Power - SAE J1349 - High Ambient | 648HP |
| Net Power - SAE J1349 - Standard Ambient | 699HP |
| Peak Torque - Speed | 2624lb/ft |
| Rated Speed | 1800r/min |
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 |
| Direct Drive - Forward 1 | Lock-up disabled |
| Transmission Type | Cat Planetary Power Shift |
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. |
| Cab - ROPS/FOPS (2) | SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994 |
| Air Conditioning | Standard air conditioning system contains environmentally friendly R134a refrigerant |
| FOPS | FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria. |
| ROPS | ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria. |
Hydraulic System - Lift/Tilt
+ -| Cylinder, Double Acting - Tilt and Tip, Bore and Stroke | 210 mm × 188 mm (8.25 in × 7.4 in) |
| Output at 2,000 rpm and 6900 kPa (1,000 psi) | 82gal/min |
| Relief Valve Setting - Bulldozer (Large Pump) | 2700psi |
| Relief Valve Setting - Tilt Cylinders (Small Pump) | 2920psi |
| Cylinders, Double Acting - Lift, Bore and Stroke | 133 mm × 1535 mm (5.25 in × 60.4 in) |
Hydraulic System - Steering
+ -| Minimum Turning Radius - Over Blade | 34ft |
| Relief Valve Setting | 4500psi |
| Maximum Flow | 94.3gal/min |
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Total Steering Angle | 35° |
Blade
+ -| Blade Capacity Range | 15.9-30.7 m3 (20.7-40.2 yd3) |
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) |
Dimensions (Approximate)
+ -| Centerline of Front Axle to Hitch | 7.5ft |
| Centerline of Rear Axle to Edge of Bumper | 12.5ft |
| Ground Clearance | 2ft |
| Height - Top of Exhaust Pipe | 16.6ft |
| Height - Top of Hood | 12.7ft |
| Height - Top of ROPS | 17.2ft |
| Length - With Blade on Ground | 36.5ft |
| Wheel Base | 15.1ft |
Standard Equipment:
Operator Environment
+ --
Air conditioner and heater with automatic temperature control
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Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)
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12V power port for mobile phone or laptop connection
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Camera, rear vision
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Cigar lighter and ashtray
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Coat hook
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Electro-hydraulic blade controls (seat mounted)
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Flip-up armrest
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Heater and defroster
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Horn, electric
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Implement hydraulic lockout
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Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature
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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
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Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock
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Light, dome (cab)
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Lunchbox and beverage holders
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Mirrors, rearview (externally mounted)
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Seat, Cat comfort (cloth) air suspension
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Seat belt, retractable, 76 mm (3 in) wide
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STIC control system with steering lock
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Tinted glass
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Trainer seat with lap belt
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Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
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Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
Power Train
+ --
Brakes, full hydraulic, enclosed, oil-disc
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Axle-shaft oil-disc service brake
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Electro hydraulic parking brake
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Case drain filters
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Cat clean emission module (Tier 4 only)
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Demand fan
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Engine Cat C27 ACERT
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Fuel priming pump (electric)
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Ground level engine shutoff, bumper
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Mufflers (under hood) (Tier 2 only)
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Precleaner, engine air intake
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Radiator, Aluminum Modular (AMR)
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Separated cooling system
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Starting aid, (ether) manual override
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Throttle Lock
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Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system
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Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
Electrical
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Alarm, back-up
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Alternator, 150 amp
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Batteries, maintenance free (2 - 1,400 CCA)
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Converter, 10/15 amp, 24V to 12V
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Deutsch component connectors
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Electrical system, 24V
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Electronic transmission control
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Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
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Starter, electric
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Starter lockout in bumper
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Starting receptacle for emergency start
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Transmission lockout in bumper
Other
+ --
Axle temperature sensor
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Battery disconnect and jump start receptacle, bumper
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Coupling, Caterpillar O-ring face seals
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Economy mode with on demand throttle
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Emergency platform egress
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Engine, crankcase, 500 hour interval with CH4
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Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
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Fenders, steel (front)
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Guards, crankcase and power train
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Grouped/labeled lube points
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Hitch, drawbar with pin
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Hoses, Cat XT
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Oil sampling valves
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Positive flow control hydraulic system
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Product Link™
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Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
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Stairway, left and right rear access
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Steering, load sensing
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Steering, secondary
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Toe kicks
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Vandalism protection caplocks
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Venturi stack
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Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
Optional Equipment:
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