Wheel Dozers 844

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Key Specs

Engine Model: C27 Cat®; C27 Cat®

Rated Speed: 1800 r/min; 1800 r/min

Gross Power - ISO 14396: 752 hp; 561 kW

844
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Overview

Mobile. Agile. Versatile.

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.

Benefits

IMPROVED EFFICIENCY

Lock-up torque converter, combined with an on-demand cooling fan and advanced engine idle management, delivers a more smooth shift

ENHANCED MAINTENANCE

Service access is conveniently located, helping to reduce maintenance time

ADDITIONAL SAFETY

Grouped, ground level engine and machine controls allow for safe and easy daily maintenance

UP TO 18% LESS CO2 EMISSIONS

The 844 emits up to 18% less CO2 than the previous 844H.

Features At A Glance

Unmatched Durability

The full box-section rear frame resists torsional shock and twisting forces.
Solid through-width push beams transfer and absorb stresses through a larger portion of the frame.
Robust structures withstand the toughest conditions and multiple lifecycles to improve your bottom line.
Resilient, durable blades are designed with excellent dozing and rolling characteristics.
Optimized axle mounting results in increased structural integrity.
Castings in the engine and frame are used in high stress areas to spread high loads.
One-piece castings enhance strength in key pin areas.

Optimum Efficiency

Experience reliable efficiency with complete control over injection timing, duration, and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
Best-in-class Cat planetary powershift transmission features consistent, smooth shifting and efficiency through integrated electronic controls.
Extended engine life and improved fuel efficiency with reduced rated speed.
Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) provide precise rimpull control.
Load sensing hydraulic steering system enables precise machine control for easier loading.
Lock-up torque converter with advanced control of lock-up speed.
On demand cooling fan protects investment and lengthens lifecycle.

Increased Safety

Battery disconnect, emergency engine shutdown, and stairway light switch are accessed through the ground level power service center.
Optional Cat Detect with Object Detection System (rearview camera and radar) or Vision (rearview camera) increase operator awareness around the machine.
Cab-mounted LED strobes provide warning for others near the machine.
Wider stairs with reduced stair angles increase safety for operators.
Access stairs via a powered platform from cab or ground level and have emergency egress access.

Innovative Technology

Integrated technologies allow you to monitor, manage, and enhance your jobsite operations.
Product Link™ remote monitoring provides valuable insight into machine or fleet performance through the VisionLink® interface, so you can make decisions that boost jobsite efficiency and lower operating costs.
Vital Information Management System (VIMS™) 3G touchscreen monitor gives access to a wide range of sensor information and enhanced machine data to resolve problems before machine failure.
Optional Cat Detect technologies enhance awareness of the environment around the machine for increased safety.

Enhanced Operator Comfort

Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steering into a single lever, maximizing responsiveness and control while reducing operator fatigue.
Operators can easily enter and exit the cab with fold-up STIC steer/armrest, reduced access stairway angles, and standard stairway lighting.
Experience reduced vibrations with isolated cab mounts and seat-mounted implement and steering controls.
Reduced interior sound levels keep operators comfortable throughout their entire shift.

Improved Sustainability

Meets U.S. EPA Tier 4 Final emissions standards.
Emits up to 18% less Co2 /hr.*
Automatic Engine Idle Shutdown conserves fuel when machine is not in use.
Generate less waste with maintenance-free batteries.
Maximize machine life and lower operating costs with Caterpillar Reman and Certified Rebuild programs, which utilize reused or remanufactured components for 40 to 70 percent cost savings.
Retrofit packages from Caterpillar deliver new features to older machines to get the most from your investment.

Simplified Maintenance

Swing-out fuel, hydraulic oil coolers, and condenser allow for easy access cleanout.
Machine features ground level or platform access to easily reach daily service points.
Swing-out doors on either side of the engine compartment provide easy access to critical daily service checks.
Optional tire pressure monitoring system provides real-time information to the operator in the cab for optimized tire life.
Electronics bay is conveniently located inside the cab.
Sight gauges offer quick visual inspection to minimize fluid contamination.
Lighting inside the engine compartment improves visibility to service points.
Ecology drains prevent spills and allow for easier service.
500-hour engine oil and filter change interval with S•O•S oil sampling analysis.
Service center includes drain and fill, electronic technician connection, and fluid level status.
Axle oil cooler and Automatic Retarder Control prevents unnecessary wear from accelerating down declines.

Built for Your Operation

Dependable blades are designed for mining with press rib construction and optimized widths and capacities for excellent dozing and rolling.
Available Cat coal blades retain load control and a large capacity for lighter materials.
Semi-U Blade features the increased capacity and spreading capabilities of a straight blade.
Heavy-Duty Semi-U blade includes a Hardox 400 Liner plate, side plates, and additional reinforcements at the bottom of the blade.
Equipped with the Cat MineStar System, a suite of integrated mine operations and mobile equipment technologies.
Cat MineStar’s capabilities help manage all aspects of operation.
Fleet provides remote machine tracking capabilities.
Terrain for Loading enables high precision management of load management.
Detect assists the operator with areas of limited visibility.
Health delivers machine condition and operating data and diagnostic tools for longer machine lifecycle.

Specifications Standard Equipment Optional Equipment

Product Specifications for 844

Engine

Engine Model	C27 Cat® C27 Cat®
Rated Speed	1800 r/min 1800 r/min
Gross Power - ISO 14396	752 hp 561 kW
Gross Power - SAE J1995:2014	766 hp 571 kW
Net Power - SAE J1349 - Standard Ambient	699 hp 521 kW
Net Power - SAE J1349 - High Ambient	648 hp 483 kW
Bore	5.4 in 137.2 mm
Stroke	6 in 152.4 mm
Displacement	1649.5 in³ 27.03 l
Peak Torque - Speed	2624 lb/ft 3557 N·m
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 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	165089 lb 74883 kg
Blade Capacities	15.9 - 30.7 m3 (20.7 - 40.2 yd3) 15.9 - 30.7 m3 (20.7 - 40.2 yd3)

Transmission

Transmission Type	Cat Planetary Power Shift Cat Planetary Power Shift
Converter Drive - Forward 1	4.5 mile/h 7.3 km/h
Converter Drive - Forward 2	8.3 mile/h 13.3 km/h
Converter Drive - Forward 3	14.2 mile/h 22.9 km/h
Converter Drive - Reverse 1	4.9 mile/h 7.9 km/h
Converter Drive - Reverse 2	9.1 mile/h 14.7 km/h
Converter Drive - Reverse 3	15.5 mile/h 24.9 km/h
Direct Drive - Forward 1	Lock-up disabled Lock-up disabled
Direct Drive - Forward 2	8.5 mile/h 13.7 km/h
Direct Drive - Forward 3	15.2 mile/h 24.5 km/h
Direct Drive - Reverse 1	5.4 mile/h 8.7 km/h
Direct Drive - Reverse 2	9.6 mile/h 15.4 km/h
Direct Drive - Reverse 3	16.4 mile/h 26.4 km/h

Hydraulic System - Lift/Tilt

Output at 2,000 rpm and 6900 kPa (1,000 psi)	82 gal/min 311 l/min
Cylinders, Double Acting - Lift, Bore and Stroke	133 mm × 1535 mm (5.25 in × 60.4 in) 133 mm × 1535 mm (5.25 in × 60.4 in)
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke	210 mm × 188 mm (8.25 in × 7.4 in) 210 mm × 188 mm (8.25 in × 7.4 in)
Relief Valve Setting - Bulldozer (Large Pump)	2700 psi 18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump)	2920 psi 20150 kPa

Hydraulic System - Steering

Steering System - Circuit	Pilot, load sensing Pilot, load sensing
Steering System - Pump	Piston, variable displacement Piston, variable displacement
Minimum Turning Radius - Over Blade	34 ft 10369 mm
Total Steering Angle	35 ° 35 °
Maximum Flow	94.3 gal/min 357 l/min
Relief Valve Setting	4500 psi 31000 kPa

Service Refill Capacities

Fuel Tank - Standard	286.6 gal (US) 1085 l
Cooling System	54.9 gal (US) 208 l
Crankcase	20 gal (US) 76 l
Transmission	29.1 gal (US) 110 l
Differential - Final Drives - Front	71.6 gal (US) 271 l
Differential - Final Drives - Rear	68.9 gal (US) 261 l
Hydraulic System - Implement and Hydraulic Fan	68.9 gal (US) 261 l
Hydraulic System - Steering and Braking	34.9 gal (US) 132 l

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. 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 Fixed
Rear	Trunnion Trunnion
Oscillation Angle	8.5 ° 8.5 °

Brakes

Brakes

Meets ISO 3540:2011 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 ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

Height - Top of ROPS	17.2 ft 5240 mm
Height - Top of Exhaust Pipe	16.6 ft 5049 mm
Height - Top of Hood	12.7 ft 3862 mm
Ground Clearance	2 ft 596 mm
Centerline of Front Axle to Hitch	7.5 ft 2300 mm
Centerline of Rear Axle to Edge of Bumper	12.5 ft 3795 mm
Wheel Base	15.1 ft 4600 mm
Length - With Blade on Ground	36.5 ft 11120 mm

844 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)

844 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

Product Specifications for 844

Download Print

Engine

Engine Model	C27 Cat® C27 Cat®
Rated Speed	1800 r/min 1800 r/min
Gross Power - ISO 14396	752 hp 561 kW
Gross Power - SAE J1995:2014	766 hp 571 kW
Net Power - SAE J1349 - Standard Ambient	699 hp 521 kW
Net Power - SAE J1349 - High Ambient	648 hp 483 kW
Bore	5.4 in 137.2 mm
Stroke	6 in 152.4 mm
Displacement	1649.5 in³ 27.03 l
Peak Torque - Speed	2624 lb/ft 3557 N·m
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 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	165089 lb 74883 kg
Blade Capacities	15.9 - 30.7 m3 (20.7 - 40.2 yd3) 15.9 - 30.7 m3 (20.7 - 40.2 yd3)

Transmission

Transmission Type	Cat Planetary Power Shift Cat Planetary Power Shift
Converter Drive - Forward 1	4.5 mile/h 7.3 km/h
Converter Drive - Forward 2	8.3 mile/h 13.3 km/h
Converter Drive - Forward 3	14.2 mile/h 22.9 km/h
Converter Drive - Reverse 1	4.9 mile/h 7.9 km/h
Converter Drive - Reverse 2	9.1 mile/h 14.7 km/h
Converter Drive - Reverse 3	15.5 mile/h 24.9 km/h
Direct Drive - Forward 1	Lock-up disabled Lock-up disabled
Direct Drive - Forward 2	8.5 mile/h 13.7 km/h
Direct Drive - Forward 3	15.2 mile/h 24.5 km/h
Direct Drive - Reverse 1	5.4 mile/h 8.7 km/h
Direct Drive - Reverse 2	9.6 mile/h 15.4 km/h
Direct Drive - Reverse 3	16.4 mile/h 26.4 km/h

Hydraulic System - Lift/Tilt

Output at 2,000 rpm and 6900 kPa (1,000 psi)	82 gal/min 311 l/min
Cylinders, Double Acting - Lift, Bore and Stroke	133 mm × 1535 mm (5.25 in × 60.4 in) 133 mm × 1535 mm (5.25 in × 60.4 in)
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke	210 mm × 188 mm (8.25 in × 7.4 in) 210 mm × 188 mm (8.25 in × 7.4 in)
Relief Valve Setting - Bulldozer (Large Pump)	2700 psi 18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump)	2920 psi 20150 kPa

Hydraulic System - Steering

Steering System - Circuit	Pilot, load sensing Pilot, load sensing
Steering System - Pump	Piston, variable displacement Piston, variable displacement
Minimum Turning Radius - Over Blade	34 ft 10369 mm
Total Steering Angle	35 ° 35 °
Maximum Flow	94.3 gal/min 357 l/min
Relief Valve Setting	4500 psi 31000 kPa

Service Refill Capacities

Fuel Tank - Standard	286.6 gal (US) 1085 l
Cooling System	54.9 gal (US) 208 l
Crankcase	20 gal (US) 76 l
Transmission	29.1 gal (US) 110 l
Differential - Final Drives - Front	71.6 gal (US) 271 l
Differential - Final Drives - Rear	68.9 gal (US) 261 l
Hydraulic System - Implement and Hydraulic Fan	68.9 gal (US) 261 l
Hydraulic System - Steering and Braking	34.9 gal (US) 132 l

Air Conditioning System

Air Conditioning

Axles

Front	Fixed Fixed
Rear	Trunnion Trunnion
Oscillation Angle	8.5 ° 8.5 °

Brakes

Brakes

Meets ISO 3540:2011 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 ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

Height - Top of ROPS	17.2 ft 5240 mm
Height - Top of Exhaust Pipe	16.6 ft 5049 mm
Height - Top of Hood	12.7 ft 3862 mm
Ground Clearance	2 ft 596 mm
Centerline of Front Axle to Hitch	7.5 ft 2300 mm
Centerline of Rear Axle to Edge of Bumper	12.5 ft 3795 mm
Wheel Base	15.1 ft 4600 mm
Length - With Blade on Ground	36.5 ft 11120 mm

844 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)

844 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

Compatible Technology and Services

Leverage Caterpillar connected data and security principles to improve efficiencies, increase productivity and make your business more profitable.

Equipment Management

Cat Inspect

Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

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Cat Product Link

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

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Cat Remote Flash

Remote Flash sends an alert from your Cat dealer, prompting you to update the software on your machine. To minimize downtime, updates can be deployed while on the jobsite without having to wait for a dealer technician to arrive. Remote flash decreases maintenance time and keeps your asset running with maximum efficiency.

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VisionLink®

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Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.

Explore Technology

Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.

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Remote Flash sends an alert from your Cat dealer, prompting you to update the software on your machine. To minimize downtime, updates can be deployed while on the jobsite without having to wait for a dealer technician to arrive. Remote flash decreases maintenance time and keeps your asset running with maximum efficiency.

Explore Technology

VisionLink® is a cloud-based software application that takes the guesswork out of fleet management with key insights to maximize performance - regardless of fleet size or equipment manufacturer. Receive equipment data seamlessly to your desktop or mobile device, all from a convenient centralized solution to make informed decisions at every turn.

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See how 844 compares against frequently compared products.

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844

Engine Model: C27 Cat®; C27 Cat®
Rated Speed: 1800 r/min; 1800 r/min
Gross Power - ISO 14396: 752 hp; 561 kW

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834

Engine Model: Cat® C18; Cat® C18
Rated Speed: 1900 r/min; 1900 r/min
Peak Power Speed: 1500 r/min; 1500 r/min

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854

Engine Model: Cat C32B; Cat C32B
Gross Power: 907 hp; 676 kW
Operating Weight: 224647 lb; 101898 kg

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844 Wheel Dozer

Meet the Pros: Cat® Wheel Dozers

Wheel Dozers 844

Overview

Mobile. Agile. Versatile.

Benefits

IMPROVED EFFICIENCY

ENHANCED MAINTENANCE

ADDITIONAL SAFETY

UP TO 18% LESS CO2 EMISSIONS

Features At A Glance

Product Specifications for 844

Engine

Operating Specifications

Transmission

Hydraulic System - Lift/Tilt

Hydraulic System - Steering

Service Refill Capacities

Air Conditioning System

Axles

Brakes

Sound Performance - Standard

Sound Performance - Suppression

Cab

Dimensions (Approximate)

844 Standard Equipment

NOTE

OPERATOR ENVIRONMENT

POWER TRAIN

ELECTRICAL

SERVICE

SAFETY

TRAMMING

OTHER

844 Optional Equipment

NOTE

POWER TRAIN

BLADES

OPERATOR ENVIRONMENT

TRAMMING

MISCELLANEOUS ATTACHMENTS

OTHER

Product Specifications for 844

Engine

Operating Specifications

Transmission

Hydraulic System - Lift/Tilt

Hydraulic System - Steering

Service Refill Capacities

Air Conditioning System

Axles

Brakes

Sound Performance - Standard

Sound Performance - Suppression

Cab

Dimensions (Approximate)

844 Standard Equipment

NOTE

OPERATOR ENVIRONMENT

POWER TRAIN

ELECTRICAL

SERVICE

SAFETY

TRAMMING

OTHER

844 Optional Equipment

NOTE

POWER TRAIN

BLADES

OPERATOR ENVIRONMENT

TRAMMING

MISCELLANEOUS ATTACHMENTS

OTHER

Compatible Technology and Services

Cat Inspect

Cat Product Link

Cat Remote Flash

VisionLink®

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