844 Wheel Dozer
Maximize productivity in mining applications with the Cat® 844 Wheel Dozer, designed with efficiency in mind. Enhanced maintenance capabilities and simplified serviceability make for a long lifecycle, low owning and operating costs, and more uptime. Move more material with a machine built for the toughest conditions.
Engine
Engine Model
Net Power - SAE J1349:2011 - Standard Ambient
Rated Speed
Emissions
Engine Power - ISO 14396:2002
Gross Power - SAE J1995:2014
Net Power - SAE J1349:2011 - High Ambient
Emissions
Engine Power - ISO 14396: 2002
Gross Power - SAE J1995:2014
Net Power - SAE J1349:2011 - Standard Ambient
Net Power - SAE J1349:2011 - High Ambient
Bore
Stroke
Displacement
Peak Torque - Speed
Torque Rise
Note
Operating Specifications
Operating Weight
Blade Capacity Range
Transmission
Transmission Type
Converter Drive - Forward 1
Converter Drive - Forward 2
Converter Drive - Forward 3
Converter Drive - Reverse 1
Converter Drive - Reverse 2
Converter Drive - Reverse 3
Direct Drive - Forward 1
Direct Drive - Forward 2
Direct Drive - Forward 3
Direct Drive - Reverse 1
Direct Drive - Reverse 2
Direct Drive - Reverse 3
Note
Hydraulic System - Lift/Tilt
Output at 2,000 rpm and 6900 kPa (1,000 psi)
Cylinders, Double Acting - Lift, Bore and Stroke
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke
Relief Valve Setting - Bulldozer (Large Pump)
Relief Valve Setting - Tilt Cylinders (Small Pump)
Hydraulic System - Steering
Steering System - Circuit
Steering System - Pump
Minimum Turning Radius - Over Blade
Total Steering Angle
Maximum Flow
Relief Valve Setting
Service Refill Capacities
Fuel Tank - Standard
Cooling System
Crankcase
Transmission
Differential - Final Drives - Front
Differential - Final Drives - Rear
Hydraulic System - Implement and Hydraulic Fan
Hydraulic System - Steering and Braking
Air Conditioning System
Air Conditioning
Axles
Front
Rear
Oscillation Angle
Brakes
Brakes
Sound Performance - Tier 4 Final / Stage V
Operator Sound Pressure Level (ISO 6396:2008)
Machine Sound Power Level (ISO 6395:2008)
Operator Sound Pressure Level (ISO 6396:2008)*
Machine Sound Power Level (ISO 6395:2008)*
Note (1)
Note (2)
Note (3)
Note (4)
Sound Performance - Tier 2
Operator Sound Pressure Level (ISO 6396:2008)
Machine Sound Power Level (ISO 6395:2008)
Operator Sound Pressure Level (ISO 6396:2008)*
Machine Sound Power Level (ISO 6395:2008)*
Note (1)
Note (2)
Note (3)
Note (4)
Cab
ROPS/FOPS
Dimensions (Approximate)
Height - Top of ROPS
Height - Top of Exhaust Pipe
Height - Top of Hood
Ground Clearance
Centerline of Front Axle to Hitch
Centerline of Rear Axle to Edge of Bumper
Wheel Base
Length - With Blade on Ground
Standard Equipment:
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- Note
-
- Standard and optional equipment may vary. Consult your Cat dealer for details.
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- Electrical And Lighting
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- 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
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- Powertrain
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- 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)
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- Operator Environment
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- 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
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- Safety
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- 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
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- Service
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- 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
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- Cooling
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- Standard ambient package (recommended for site conditions that do not exceed 43°C (110°F)
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- Cold Weather
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- Heated seat
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- Efficiency
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- 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
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- Tramming
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- Front fenders
Optional Equipment:
-
- Note
-
- Standard and optional equipment may vary. Consult your Cat dealer for details.
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- Electrical And Lighting
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- Lights, LED
- Product Link (Cellular)
- Product Link (Satellite)
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- Powertrain
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- Engine brake
- No-spin rear axle
- No-spin rear axle and oil cooler
- Precleaner, raised
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- Operator Environment
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- Radio, Sirius XM/AM/FM radio with Bluetooth technology, USB port, 3.5 mm AUX input
- Rubber mounted cab glass
- Window sun screen
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- Safety
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- LED warning strobe
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- Service
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- Product Link™
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- Blades
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- HD Semi-U - 16.1 m3 (21.1 yd3)
- Paint, black blade rear
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- Cooling
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- High ambient cooling - software (recommended for site conditions that do not exceed 49°C [121°F]
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- Cold Weather
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- 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
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- Tramming
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- Fender extensions, roading, front and rear
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