844
844 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 844 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.
Long Term Value and Durability
Move More with Less Fuel
Safety First
Technology that Gets Work Done
Work In Comfort
Reduce Environmental Impact
Save on Service and Maintenance
Purpose-Built Cat Attachments
Virtual Tours
Documents & Brochures
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
- Cigar lighter and ashtray
- Coat hook
- Electro-hydraulic blade controls (joystick)
- Flip-up armrest
- Heater and defroster
- Horn, electric
- 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, 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
- STIC control system with steering lock
- Tinted glass
- Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
- Converter (12V, 10/15 amp) and power port
POWER TRAIN
- Brakes, oil cooled, multi-disc, service/secondary
- Axle-shaft oil-disc service brake
- Electro hydraulic parking brake
- Cat clean emission module (Tier 4 only)
- Demand fan
- Engine Cat C27
- Fuel priming pump (electric)
- Ground level engine shutoff
- Mufflers (under hood) (Tier 2 only)
- Precleaner, engine air intake
- Radiator, Aluminum Modular (AMR)
- Separated cooling system
- Starting aid, (ether) automatic
- Throttle Lock electronic
- 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
- Alternator, 150 amp
- Batteries, maintenance free (4 - 1,400 CCA)
- Deutsch terminal connectors
- Electrical system, 24V
- Electronic transmission control
- Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
- Starting and charging system, 24V
- Starter lockout in bumper
- Starting receptacle for emergency start
- Transmission lockout in bumper
SERVICE
- Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
- Case drain filters
- Coupling, Caterpillar O-ring face seals
- Guards, crankcase and power train
- Hitch, drawbar with pin
- Hoses, Cat XT
- Oil sampling valves
- Product Link™
SAFETY
- Camera, rear vision
- Implement lockout switch
- Seat belt, retractable, 76 mm (3 in) wide
- Trainer seat with lap belt
- Alarm, back-up
- Emergency platform egress
- Stairway, left and right rear access
- Steering, secondary
- Toe kicks
TRAMMING
- Fenders, steel (front)
OTHER
- Axle temperature sensor
- Battery disconnect and jump start receptacle, bumper
- Economy mode with on demand throttle
- Engine, crankcase, 500 hour interval with CH4
- Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
- Grouped/labeled lube points
- Positive flow control hydraulic system
- Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
- Steering, load sensing
- Vandalism protection caplocks
- Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
Additional information
Engine Model | C27 Cat® |
---|---|
Engine - Rated Speed | 1800.0 r/min ( 1800.0 r/min ) |
Engine - Gross Power - ISO 14396 | 561.0 kW ( 752.0 HP ) |
Engine - Gross Power - SAE J1995 | 571.0 kW ( 766.0 HP ) |
Engine - Net Power - SAE J1349 - Standard Ambient | 521.0 kW ( 699.0 HP ) |
Engine - Net Power - SAE J1349 - High Ambient | 483.0 kW ( 648.0 HP ) |
Engine - Bore | 137.2 mm ( 5.4 in ) |
Engine - Stroke | 152.4 mm ( 6.0 in ) |
Engine - Displacement | 27.03 l ( 1649.5 in³ ) |
Engine - Peak Torque - Speed | 3557.0 N·m ( 2624.0 lb/ft ) |
Engine - Torque Rise | 18.0 % ( 18.0 % ) |
Engine - 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 | 74883.0 kg ( 165089.0 lb ) |
Operating Specifications - Blade Capacities | 15.9 – 30.7 m3 (20.7 – 40.2 yd3) |
Transmission Type | Cat Planetary Power Shift |
Transmission - Converter Drive - Forward 1 | 7.3 km/h ( 4.5 mile/h ) |
Transmission - Converter Drive - Forward 2 | 13.3 km/h ( 8.3 mile/h ) |
Transmission - Converter Drive - Forward 3 | 22.9 km/h ( 14.2 mile/h ) |
Transmission - Converter Drive - Reverse 1 | 7.9 km/h ( 4.9 mile/h ) |
Transmission - Converter Drive - Reverse 2 | 14.7 km/h ( 9.1 mile/h ) |
Transmission - Converter Drive - Reverse 3 | 24.9 km/h ( 15.5 mile/h ) |
Transmission - Direct Drive - Forward 1 | Lock-up disabled |
Transmission - Direct Drive - Forward 2 | 13.7 km/h ( 8.5 mile/h ) |
Transmission - Direct Drive - Forward 3 | 24.5 km/h ( 15.2 mile/h ) |
Transmission - Direct Drive - Reverse 1 | 8.7 km/h ( 5.4 mile/h ) |
Transmission - Direct Drive - Reverse 2 | 15.4 km/h ( 9.6 mile/h ) |
Transmission - Direct Drive - Reverse 3 | 26.4 km/h ( 16.4 mile/h ) |
Hydraulic System - Lift/Tilt - Output at 2,000 rpm and 6900 kPa (1,000 psi) | 311.0 l/min ( 82.0 gal/min ) |
Hydraulic System - Lift/Tilt - Cylinders, Double Acting - Lift, Bore and Stroke | 133 mm × 1535 mm (5.25 in × 60.4 in) |
Hydraulic System - Lift/Tilt - Cylinder, Double Acting - Tilt and Tip, Bore and Stroke | 210 mm × 188 mm (8.25 in × 7.4 in) |
Hydraulic System - Lift/Tilt - Relief Valve Setting - Bulldozer (Large Pump) | 18650.0 kPa ( 2700.0 psi ) |
Hydraulic System - Lift/Tilt - Relief Valve Setting - Tilt Cylinders (Small Pump) | 20150.0 kPa ( 2920.0 psi ) |
Hydraulic System - Steering - Steering System - Circuit | Pilot, load sensing |
Hydraulic System - Steering - Steering System - Pump | Piston, variable displacement |
Hydraulic System - Steering - Minimum Turning Radius - Over Blade | 10369.0 mm ( 34.0 ft ) |
Hydraulic System - Steering - Total Steering Angle | 35.0 ° ( 35.0 ° ) |
Hydraulic System - Steering - Maximum Flow | 357.0 l/min ( 94.3 gal/min ) |
Hydraulic System - Steering - Relief Valve Setting | 31000.0 kPa ( 4500.0 psi ) |
Service Refill Capacities - Fuel Tank - Standard | 1085.0 l ( 286.6 gal (US) ) |
Service Refill Capacities - Cooling System | 208.0 l ( 54.9 gal (US) ) |
Service Refill Capacities - Crankcase | 76.0 l ( 20.0 gal (US) ) |
Service Refill Capacities - Transmission | 110.0 l ( 29.1 gal (US) ) |
Service Refill Capacities - Differential - Final Drives - Front | 271.0 l ( 71.6 gal (US) ) |
Service Refill Capacities - Differential - Final Drives - Rear | 261.0 l ( 68.9 gal (US) ) |
Service Refill Capacities - Hydraulic System - Implement and Hydraulic Fan | 261.0 l ( 68.9 gal (US) ) |
Service Refill Capacities - Hydraulic System - Steering and Braking | 132.0 l ( 34.9 gal (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 |
Axles - Rear | Trunnion |
Axles - Oscillation Angle | 8.5 ° ( 8.5 ° ) |
Brakes | Meets ISO 3540:2011 |
Sound Performance - Standard - Operator Sound Level (ISO 6396:2008) | 69.0 dB(A) ( 69.0 dB(A) ) |
Sound Performance - Standard - Machine Sound Level (ISO 6395:2008) | 115.0 dB(A) ( 115.0 dB(A) ) |
Sound Performance - Suppression - Operator Sound Level (ISO 6396:2008) | 69.0 dB(A) ( 69.0 dB(A) ) |
Sound Performance - Suppression - Machine Sound Level (ISO 6395:2008) | 113.0 dB(A) ( 113.0 dB(A) ) |
Cab - ROPS/FOPS | ISO 3471:2008 and ISO 3449:2005 Level II Standards |
Dimensions (Approximate) - Height - Top of ROPS | 5240.0 mm ( 17.2 ft ) |
Dimensions (Approximate) - Height - Top of Exhaust Pipe | 5049.0 mm ( 16.6 ft ) |
Dimensions (Approximate) - Height - Top of Hood | 3862.0 mm ( 12.7 ft ) |
Dimensions (Approximate) - Ground Clearance | 596.0 mm ( 2.0 ft ) |
Dimensions (Approximate) - Centerline of Front Axle to Hitch | 2300.0 mm ( 7.5 ft ) |
Dimensions (Approximate) - Centerline of Rear Axle to Edge of Bumper | 3795.0 mm ( 12.5 ft ) |
Dimensions (Approximate) - Wheel Base | 4600.0 mm ( 15.1 ft ) |
Dimensions (Approximate) - Length - With Blade on Ground | 11120.0 mm ( 36.5 ft ) |