Wheel Dozers

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Details

Engine Model
Cat® C27

Operating Weight
165089 lb

Net Power - SAE J1349:2011 - Standard Ambient
732 hp

Contact

Contact Foley Equipment and ask for Sales

+1 (316) 943-4211

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Overview

Mobile. Agile. Versatile.

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.

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

Features at a Glance

Long Term Value and 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 help improve your bottom line.
Resilient, durable blades are designed with excellent dozing and rolling characteristics.
Optimized axle mounting helps result in increased structural integrity.
Castings in the engine and frame are used in high stress areas to spread high loads.
One-piece castings help enhance strength in key pin areas.

Move More with Less Fuel

Experience reliable efficiency with complete control over injection timing, duration, and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
World-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) help 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 helps protect investment and helps lengthen lifecycle.

Safety First

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) help increase operator awareness around the machine.
Cab-mounted LED strobes provide warning for others near the machine.
Wider stairs with reduced stair angles help increase safety for operators.
Access stairs via a powered platform from cab or ground level and have emergency exit access.

Technology that Gets Work Done

Integrated technologies assist with monitoring, managing, and enhancing your jobsite operations.
Product Link™ remote monitoring helps provide 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™) 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 help enhance awareness of the environment around the machine for increased safety.

Work In Comfort

Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steering into a single lever, helping to maximize 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 help keep operators comfortable throughout their entire shift.

Reduce Environmental Impact

Meets U.S. EPA Tier 4 Final emissions standards or equivalent to U.S. EPA Tier 2.
Automatic Engine Idle Shutdown helps conserve 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.

Save on Service and 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 help 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 help minimize fluid contamination.
Lighting inside the engine compartment helps improve visibility to service points.
Ecology drains help 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 helps prevent unnecessary wear from accelerating down declines.

Purpose-Built Cat Attachments

Dependable blades are designed for mining with press rib construction and optimized widths and capacities for excellent dozing and rolling.
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 helps enable 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 a long machine lifecycle.

Specifications

Full Specifications

Engine: Engine Model
Cat® C27

Net Power - SAE J1349:2011 - Standard Ambient
732 hp

Rated Speed
1800 r/min

Emissions
Option 1 - U.S. EPA Tier 4 Final / EU Stage V

Engine Power - ISO 14396:2002
786 hp

Gross Power - SAE J1995:2014
801 hp

Net Power - SAE J1349:2011 - High Ambient
681 hp

Emissions
Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2

Engine Power - ISO 14396: 2002
752 hp

Gross Power - SAE J1995:2014
766 hp

Net Power - SAE J1349:2011 - Standard Ambient
699 hp

Net Power - SAE J1349:2011 - High Ambient
648 hp

Bore
5.4 in

Stroke
6.0 in

Displacement
1649.5 in³

Peak Torque - Speed
2624 lb/ft

Torque Rise
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
165089 lb

Blade Capacity Range
20.8 yd³

Transmission: Transmission Type
Cat Planetary Power Shift

Converter Drive - Forward 1
4.5 mile/h

Converter Drive - Forward 2
8.3 mile/h

Converter Drive - Forward 3
14.2 mile/h

Converter Drive - Reverse 1
4.9 mile/h

Converter Drive - Reverse 2
9.1 mile/h

Converter Drive - Reverse 3
15.5 mile/h

Direct Drive - Forward 1
Lock-up disabled

Direct Drive - Forward 2
8.5 mile/h

Direct Drive - Forward 3
15.2 mile/h

Direct Drive - Reverse 1
5.4 mile/h

Direct Drive - Reverse 2
9.6 mile/h

Direct Drive - Reverse 3
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)
82 gpm

Cylinders, Double Acting - Lift, Bore and Stroke
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)

Relief Valve Setting - Bulldozer (Large Pump)
2700 psi

Relief Valve Setting - Tilt Cylinders (Small Pump)
2920 psi

Hydraulic System - Steering: Steering System - Circuit
Pilot, load sensing

Steering System - Pump
Piston, variable displacement

Minimum Turning Radius - Over Blade
34.0 ft

Total Steering Angle
35 °

Maximum Flow
94.3 gpm

Relief Valve Setting
4500 psi

Service Refill Capacities: Fuel Tank - Standard
286.6 gal (US)

Cooling System
54.9 gal (US)

Crankcase
20 gal (US)

Transmission
29.1 gal (US)

Differential - Final Drives - Front
71.6 gal (US)

Differential - Final Drives - Rear
68.9 gal (US)

Hydraulic System - Implement and Hydraulic Fan
68.9 gal (US)

Hydraulic System - Steering and Braking
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 °

Brakes: Brakes
Meets ISO 3540:2011

Sound Performance - Tier 4 Final / Stage V: Operator Sound Pressure Level (ISO 6396:2008)
72 dB(A)

Machine Sound Power Level (ISO 6395:2008)
116 dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*
72 dB(A)

Machine Sound Power Level (ISO 6395:2008)*
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)

Machine Sound Power Level (ISO 6395:2008)
116 dB(A)

Operator Sound Pressure Level (ISO 6396:2008)*
72 dB(A)

Machine Sound Power Level (ISO 6395:2008)*
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
17.2 ft

Height - Top of Exhaust Pipe
16.6 ft

Height - Top of Hood
12.7 ft

Ground Clearance
2.0 ft

Centerline of Front Axle to Hitch
7.5 ft

Centerline of Rear Axle to Edge of Bumper
12.5 ft

Wheel Base
15.1 ft

Length - With Blade on Ground
36.5 ft

Equipment

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