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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 | 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