Description
Wheel Dozers
844
Engine Model
Cat® C27
Operating Weight
74883 kg
Net Power – SAE J1349:2011 – Standard Ambient
546 kW
SPECIFICATIONS
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.
Specifications
Engine Model
Cat® C27
Operating Weight
74883 kg
Net Power - SAE J1349:2011 - Standard Ambient
546 kW
Rated Speed
1800 r/min
Emissions
Option 1 – U.S. EPA Tier 4 Final / EU Stage V
Engine Power - ISO 14396:2002
586 kW
Gross Power - SAE J1995:2014
597 kW
Net Power - SAE J1349:2011 - High Ambient
508 kW
Emissions
Option 2 – China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
Engine Power - ISO 14396: 2002
561 kW
Gross Power - SAE J1995:2014
571 kW
Net Power - SAE J1349:2011 - Standard Ambient
521 kW
Net Power - SAE J1349:2011 - High Ambient
483 kW
Bore
137.2 mm
Stroke
152.4 mm
Displacement
27.03 l
Peak Torque - Speed
3557 N·m
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.
Blade Capacity Range
15.9 m³
Transmission Type
Cat Planetary Power Shift
Converter Drive - Forward 1
7.3 km/h
Converter Drive - Forward 2
13.3 km/h
Converter Drive - Forward 3
22.9 km/h
Converter Drive - Reverse 1
7.9 km/h
Converter Drive - Reverse 2
14.7 km/h
Converter Drive - Reverse 3
24.9 km/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 2
13.7 km/h
Direct Drive - Forward 3
24.5 km/h
Direct Drive - Reverse 1
8.7 km/h
Output at 2,000 rpm and 6900 kPa (1,000 psi)
311 l/min
Direct Drive - Reverse 2
15.4 km/h
Cylinders, Double Acting - Lift, Bore and Stroke
133 mm × 1535 mm (5.25 in × 60.4 in)
Direct Drive - Reverse 3
26.4 km/h
Cylinder, Double Acting - Tilt and Tip, Bore and Stroke
210 mm × 188 mm (8.25 in × 7.4 in)
Note
Travel speeds based on 45/65-45 L-5 46 ply tires.
Relief Valve Setting - Bulldozer (Large Pump)
18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump)
20150 kPa
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Minimum Turning Radius - Over Blade
10369 mm
Total Steering Angle
35 °
Maximum Flow
357 l/min
Relief Valve Setting
31000 kPa
Fuel Tank - Standard
1085 l
Cooling System
208 l
Crankcase
76 l
Transmission
110 l
Differential - Final Drives - Front
271 l
Differential - Final Drives - Rear
261 l
Hydraulic System - Implement and Hydraulic Fan
261 l
Hydraulic System - Steering and Braking
132 l
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).
Front
Fixed
Rear
Trunnion
Oscillation Angle
8.5 °
Brakes
Meets ISO 3540:2011
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.
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.
ROPS/FOPS
ISO 3471:2008 and ISO 3449:2005 Level II Standards
Height - Top of ROPS
5240 mm
Height - Top of Exhaust Pipe
5049 mm
Height - Top of Hood
3862 mm
Ground Clearance
596 mm
Centerline of Front Axle to Hitch
2300 mm
Centerline of Rear Axle to Edge of Bumper
3795 mm
Wheel Base
4600 mm
Length - With Blade on Ground
11120 mm
Features
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
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
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
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
Why choose RIMCO Barbados
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