844 Wheel Dozer
360° Exterior View
360° Interior View
At a Glance
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Overview
Engine
+ -| Engine Model | C27 Cat® |
| Rated Speed | 1800r/min |
| Gross Power - ISO 14396 | 752HP |
| Gross Power - SAE J1995 | 766HP |
| Net Power - SAE J1349 - Standard Ambient | 699HP |
| Net Power - SAE J1349 - High Ambient | 648HP |
| Bore | 5.4in |
| Stroke | 6in |
| Displacement | 1649.5in³ |
| Peak Torque - Speed | 2624lb/ft |
| Torque Rise | 18% |
| Emissions | U.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2 |
Operating Specifications
+ -| Operating Weight | 165089lb |
| Blade Capacities | 15.9 - 30.7 m3 (20.7 - 40.2 yd3) |
Transmission
+ -| Transmission Type | Cat Planetary Power Shift |
| 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 1 | Lock-up disabled |
| 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 |
Hydraulic System - Lift/Tilt
+ -| 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) |
| Cylinder, Double Acting - Tilt and Tip, Bore and Stroke | 210 mm × 188 mm (8.25 in × 7.4 in) |
| Relief Valve Setting - Bulldozer (Large Pump) | 2700psi |
| Relief Valve Setting - Tilt Cylinders (Small Pump) | 2920psi |
Hydraulic System - Steering
+ -| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Minimum Turning Radius - Over Blade | 34ft |
| Total Steering Angle | 35° |
| Maximum Flow | 94.3gal/min |
| Relief Valve Setting | 4500psi |
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) |
Air Conditioning System
+ -| Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes. |
Axles
+ -| Front | Fixed |
| Rear | Trunnion |
| Oscillation Angle | 8.5° |
Brakes
+ -| Brakes | Meets ISO 3540:2011 |
Sound Performance - Standard
+ -| Operator Sound Level (ISO 6396:2008) | 69dB(A) |
| Machine Sound Level (ISO 6395:2008) | 115dB(A) |
Sound Performance - Suppression
+ -| Operator Sound Level (ISO 6396:2008) | 69dB(A) |
| Machine Sound Level (ISO 6395:2008) | 113dB(A) |
Cab
+ -| ROPS/FOPS | ISO 3471:2008 and ISO 3449:2005 Level II Standards |
Dimensions (Approximate)
+ -| Height - Top of ROPS | 17.2ft |
| Height - Top of Exhaust Pipe | 16.6ft |
| Height - Top of Hood | 12.7ft |
| Ground Clearance | 2ft |
| Centerline of Front Axle to Hitch | 7.5ft |
| Centerline of Rear Axle to Edge of Bumper | 12.5ft |
| Wheel Base | 15.1ft |
| Length - With Blade on Ground | 36.5ft |
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
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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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Cigar lighter and ashtray
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Coat hook
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Electro-hydraulic blade controls (joystick)
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Flip-up armrest
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Heater and defroster
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Horn, electric
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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, premium with heated and actively cooled leather, adjustable lumbar support, air adjustable bolsters on the seat and backrest, seat cushion tilt adjustment, and adjustable-length seat cushion
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STIC control system with steering lock
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Tinted glass
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Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
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Converter (12V, 10/15 amp) and power port
Power Train
+ --
Brakes, oil cooled, multi-disc, service/secondary
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Axle-shaft oil-disc service brake
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Electro hydraulic parking brake
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Cat clean emission module (Tier 4 only)
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Demand fan
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Engine Cat C27
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Fuel priming pump (electric)
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Ground level engine shutoff
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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) automatic
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Throttle Lock electronic
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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
+ --
Alternator, 150 amp
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Batteries, maintenance free (4 - 1,400 CCA)
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Deutsch terminal 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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Starting and charging system, 24V
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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
Service
+ --
Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
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Case drain filters
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Coupling, Caterpillar O-ring face seals
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Guards, crankcase and power train
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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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Product Link™
Safety
+ --
Camera, rear vision
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Implement lockout switch
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Seat belt, retractable, 76 mm (3 in) wide
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Trainer seat with lap belt
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Alarm, back-up
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Emergency platform egress
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Stairway, left and right rear access
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Steering, secondary
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Toe kicks
Tramming
+ --
Fenders, steel (front)
Other
+ --
Axle temperature sensor
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Battery disconnect and jump start receptacle, bumper
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Economy mode with on demand throttle
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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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Grouped/labeled lube points
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Positive flow control hydraulic system
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Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
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Steering, load sensing
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Vandalism protection caplocks
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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/MP3 radio
Satellite Sirius radio with Bluetooth
LED warning strobe
CB radio ready
Window sun shade
Tramming
+ -Front and rear roading fenders
Miscellaneous Attachments
+ -Fast fill fuel system (Shaw-Aero)
Axle oscillation stop
Paint, black blade rear
Other
+ -Venturi stack