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844 Wheel Dozer
- 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
| Engine | |
|---|---|
| Engine Model | C27 Cat® |
| Rated Speed | 1800 r/min (1800 r/min) |
| Gross Power - ISO 14396 | 561 kW (752 hp) |
| Gross Power - SAE J1995:2014 | 571 kW (766 hp) |
| Net Power - SAE J1349 - Standard Ambient | 521 kW (699 hp) |
| Net Power - SAE J1349 - High Ambient | 483 kW (648 hp) |
| Bore | 137.2 mm (5.4 in) |
| Stroke | 152.4 mm (6 in) |
| Displacement | 27.03 l (1649.5 inu00b3) |
| Peak Torque - Speed | 3557 N·m (2624 lb/ft) |
| Torque Rise | 18 % (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 | 74883 kg (165089 lb) |
| Blade Capacities | 15.9 - 30.7 m3 (20.7 - 40.2 yd3) |
| Transmission | |
|---|---|
| Transmission Type | Cat Planetary Power Shift |
| Converter Drive - Forward 1 | 7.3 km/h (4.5 mile/h) |
| Converter Drive - Forward 2 | 13.3 km/h (8.3 mile/h) |
| Converter Drive - Forward 3 | 22.9 km/h (14.2 mile/h) |
| Converter Drive - Reverse 1 | 7.9 km/h (4.9 mile/h) |
| Converter Drive - Reverse 2 | 14.7 km/h (9.1 mile/h) |
| Converter Drive - Reverse 3 | 24.9 km/h (15.5 mile/h) |
| Direct Drive - Forward 1 | Lock-up disabled |
| Direct Drive - Forward 2 | 13.7 km/h (8.5 mile/h) |
| Direct Drive - Forward 3 | 24.5 km/h (15.2 mile/h) |
| Direct Drive - Reverse 1 | 8.7 km/h (5.4 mile/h) |
| Direct Drive - Reverse 2 | 15.4 km/h (9.6 mile/h) |
| 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 l/min (82 gal/min) |
| Cylinders, Double Acting - Lift, Bore and Stroke | 133 mm u00d7 1535 mm (5.25 in u00d7 60.4 in) |
| Cylinder, Double Acting - Tilt and Tip, Bore and Stroke | 210 mm u00d7 188 mm (8.25 in u00d7 7.4 in) |
| Relief Valve Setting - Bulldozer (Large Pump) | 18650 kPa (2700 psi) |
| Relief Valve Setting - Tilt Cylinders (Small Pump) | 20150 kPa (2920 psi) |
| Hydraulic System - Steering | |
|---|---|
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Minimum Turning Radius - Over Blade | 10369 mm (34 ft) |
| Total Steering Angle | 35 u00b0 (35 u00b0) |
| Maximum Flow | 357 l/min (94.3 gal/min) |
| Relief Valve Setting | 31000 kPa (4500 psi) |
| Service Refill Capacities | |
|---|---|
| Fuel Tank - Standard | 1085 l (286.6 gal (US)) |
| Cooling System | 208 l (54.9 gal (US)) |
| Crankcase | 76 l (20 gal (US)) |
| Transmission | 110 l (29.1 gal (US)) |
| Differential - Final Drives - Front | 271 l (71.6 gal (US)) |
| Differential - Final Drives - Rear | 261 l (68.9 gal (US)) |
| Hydraulic System - Implement and Hydraulic Fan | 261 l (68.9 gal (US)) |
| Hydraulic System - Steering and Braking | 132 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 |
| Rear | Trunnion |
| Oscillation Angle | 8.5 u00b0 (8.5 u00b0) |
| Brakes | |
|---|---|
| Brakes | Meets ISO 3540:2011 |
| Sound Performance - Standard | |
|---|---|
| Operator Sound Level (ISO 6396:2008) | 69 dB(A) (69 dB(A)) |
| Machine Sound Level (ISO 6395:2008) | 115 dB(A) (115 dB(A)) |
| Sound Performance - Suppression | |
|---|---|
| Operator Sound Level (ISO 6396:2008) | 69 dB(A) (69 dB(A)) |
| Machine Sound Level (ISO 6395:2008) | 113 dB(A) (113 dB(A)) |
| Cab | |
|---|---|
| ROPS/FOPS | ISO 3471:2008 and ISO 3449:2005 Level II Standards |
| Dimensions (Approximate) | |
|---|---|
| Height - Top of ROPS | 5240 mm (17.2 ft) |
| Height - Top of Exhaust Pipe | 5049 mm (16.6 ft) |
| Height - Top of Hood | 3862 mm (12.7 ft) |
| Ground Clearance | 596 mm (2 ft) |
| Centerline of Front Axle to Hitch | 2300 mm (7.5 ft) |
| Centerline of Rear Axle to Edge of Bumper | 3795 mm (12.5 ft) |
| Wheel Base | 4600 mm (15.1 ft) |
| Length - With Blade on Ground | 11120 mm (36.5 ft) |
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)
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