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844 Wheel Dozer (Tier 4 Final)
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 | Cat® C27 |
| Net Power - SAE J1349:2011 - Standard Ambient | 546 kW (732 hp) |
| Rated Speed | 1800 r/min (1800 r/min) |
| Emissions | Option 1 - U.S. EPA Tier 4 Final / EU Stage V |
| Engine Power - ISO 14396:2002 | 586 kW (786 hp) |
| Gross Power - SAE J1995:2014 | 597 kW (801 hp) |
| Net Power - SAE J1349:2011 - High Ambient | 508 kW (681 hp) |
| Emissions | Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2 |
| Engine Power - ISO 14396: 2002 | 561 kW (752 hp) |
| Gross Power - SAE J1995:2014 | 571 kW (766 hp) |
| Net Power - SAE J1349:2011 - Standard Ambient | 521 kW (699 hp) |
| Net Power - SAE J1349:2011 - 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 %) |
| Note | Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. |
| Operating Specifications | |
|---|---|
| Operating Weight | 74883 kg (165089 lb) |
| Blade Capacity Range | 15.9 mu00b3 (20.8 ydu00b3) |
| 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) |
| Note | Travel speeds based on 45/65-45 L-5 46 ply tires. |
| Hydraulic System - Lift/Tilt | |
|---|---|
| Output at 2,000 rpm and 6900 kPa (1,000 psi) | 311 L/min (82 gpm) |
| 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 gpm) |
| 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 or R1234yf. See the label or instruction manual for identification of the gas. - If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons). |
| Axles | |
|---|---|
| Front | Fixed |
| Rear | Trunnion |
| Oscillation Angle | 8.5 u00b0 (8.5 u00b0) |
| Brakes | |
|---|---|
| Brakes | Meets ISO 3540:2011 |
| Sound Performance - Tier 4 Final / Stage V | |
|---|---|
| Operator Sound Pressure Level (ISO 6396:2008) | 72 dB(A) (72 dB(A)) |
| Machine Sound Power Level (ISO 6395:2008) | 116 dB(A) (116 dB(A)) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) (72 dB(A)) |
| Machine Sound Power Level (ISO 6395:2008)* | 114 dB(A) (114 dB(A)) |
| Note (1) | *Sound suppression equipped |
| Note (2) | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (3) | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (4) | Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. |
| Sound Performance - Tier 2 | |
|---|---|
| Operator Sound Pressure Level (ISO 6396:2008) | 72 dB(A) (72 dB(A)) |
| Machine Sound Power Level (ISO 6395:2008) | 116 dB(A) (116 dB(A)) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) (72 dB(A)) |
| Machine Sound Power Level (ISO 6395:2008)* | 114 dB(A) (114 dB(A)) |
| Note (1) | *Sound suppression equipped |
| Note (2) | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (3) | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (4) | Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. |
| 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.
- ELECTRICAL AND LIGHTING
- Alternator, 150 amp
- Batteries, maintenance free (4 – 1,400 CCA)
- Battery disconnect and jump start receptacle, bumper
- Deutsch terminal connectors
- Electrical system, 24V
- Electronic transmission control
- Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
- Starter lockout in bumper
- Starting and charging system, 24V
- Transmission lockout in bumper
- POWERTRAIN
- Brakes, oil cooled, multi-disc, service/secondary
- Driveline parking brake
- Engine Cat C27
- Fuel priming pump (electric)
- Ground level engine shutdown switch
- Precleaner, engine air intake (above hood)
- Radiator, Aluminum Modular (AMR)
- Starting aid, (ether) automatic
- Throttle Lock electronic
- Torque Converter, Impeller clutch with lock-up clutch (ICTC) and rimpull control system
- Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
- OPERATOR ENVIRONMENT
- Advisor display, displays real time operating information, performs calibrations and customizes operator setting
- Air conditioner and heater with automatic temperature control
- Air precleaner, powered
- Cab, sound-suppressed pressurized, separate external rolloever protective structure/falling objects protective structure (ROPS/FOPS)
- Cigar lighter and ashtray
- Coat hook
- Converter (12V, 10/15 amp) and power port
- Electro-hydraulic blade controls (joystick)
- Heater and defroster
- Horn, electric
- Instrumentation, gauges: – engine coolant temperature, fuel level, hydraulic oil temperature, powertrain oil temperature, tachometer
- 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
- Light, dome (cab)
- Lunchbox and beverage holders
- 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
- Radio, AM/FM with Bluetooth®, USB Port, 3.5 mm AUX input
- Tinted glass
- Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
- SAFETY
- Alarm, back-up
- Camera, rear vision
- Emergency platform exit
- Implement lockout switch
- Mirrors, rearview (externally mounted)
- Seat belt, retractable, 76 mm (3 in) wide
- Stairway, left and right rear access
- Steering and transmission lock lever, cab
- Steering, secondary
- Seat, trainer with lap belt, 76 mm (3in) wide
- Toe kicks
- SERVICE
- Axle ecology drains
- Case drain filters
- Coupling, Caterpillar O-ring face seals
- Engine, crankcase, 500 hour interval with CH4
- Front walkway around cab
- Guards, crankcase and powertrain
- Grouped/labeled lube points
- Battery disconnect and jump start receptacle, bumper
- Hitch, drawbar with pin
- Hoses, Cat XT™
- Oil sampling valves
- Sight guages for steering, implement and transmission oil
- Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
- COOLING
- Standard ambient package (recommended for site conditions that do not exceed 43°C (110°F)
- COLD WEATHER
- Heated seat
- EFFICIENCY
- Economy mode with on demand throttle
- Positive flow control hydraulic system
- Impeller Clutch Torque Converter (ICTC) with lock-up clutch
- Steering, load sensing
- Soft detent controls
- Engine idle management features: – Auto idle kickdown – Delayed engine shutdown – Engine idle shutdown
- TRAMMING
- Front fenders
Optional Equipment
- NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
- ELECTRICAL AND LIGHTING
- Lights, LED
- Product Link (Cellular)
- Product Link (Satellite)
- POWERTRAIN
- Engine brake
- No-spin rear axle
- No-spin rear axle and oil cooler
- Precleaner, raised
- OPERATOR ENVIRONMENT
- Radio, Sirius XM/AM/FM radio with Bluetooth technology, USB port, 3.5 mm AUX input
- Rubber mounted cab glass
- Window sun screen
- SAFETY
- LED warning strobe
- SERVICE
- Product Link™
- BLADES
- HD Semi-U – 16.1 m3 (21.1 yd3)
- Paint, black blade rear
- COOLING
- High ambient cooling – software (recommended for site conditions that do not exceed 49°C [121°F]
- COLD WEATHER
- 50° C (-58° F) antifreeze
- 120V or 240V coolant heating elements (recommended in conditions from -18°C to -30°C [0°F to -22°F]
- -40°C (-40°F) Hydraulic Oil, Arctic
- TRAMMING
- Fender extensions, roading, front and rear