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844
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
844 Wheel Dozer
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844
844
Wheel Dozers
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 Model
Cat® C27
Net Power - SAE J1349:2011 - Standard Ambient
732 hp/546 kW
Rated Speed
1800 r/min/1800 r/min
Emissions
Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Key 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
Specifications
Metric
|
Imperial
Engine 
Engine Model
Cat® C27
Net Power - SAE J1349:2011 - Standard Ambient
732 hp
546 kW
Rated Speed
1800 r/min
1800 r/min
Emissions
Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Engine Power - ISO 14396:2002
786 hp
586 kW
Gross Power - SAE J1995:2014
801 hp
597 kW
Net Power - SAE J1349:2011 - High Ambient
681 hp
508 kW
Emissions
Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Engine Power - ISO 14396: 2002
752 hp
561 kW
Gross Power - SAE J1995:2014
801 hp
597 kW
Net Power - SAE J1349:2011 - Standard Ambient
732 hp
546 kW
Net Power - SAE J1349:2011 - High Ambient
681 hp
508 kW
Bore
5.4 in
137.2 mm
Stroke
6.0 in
152.4 mm
Displacement
1649.5 in³
27.03 l
Peak Torque - Speed
2624 lb/ft
3557 N·m
Torque Rise
18 %
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
74883 kg
Blade Capacity Range
20.8 yd³
15.9 m³
Transmission
Transmission Type
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
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
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.
Hydraulic System - Lift/Tilt
Output at 2,000 rpm and 6900 kPa (1,000 psi)
82 gpm
311 L/min
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
18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump)
2920 psi
20150 kPa
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Minimum Turning Radius - Over Blade
34.0 ft
10369 mm
Total Steering Angle
35 °
35 °
Maximum Flow
94.3 gpm
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 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 °
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)
72 dB(A)
Machine Sound Power Level (ISO 6395:2008)
116 dB(A)
116 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*
72 dB(A)
72 dB(A)
Machine Sound Power Level (ISO 6395:2008)*
114 dB(A)
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)
72 dB(A)
Machine Sound Power Level (ISO 6395:2008)
116 dB(A)
116 dB(A)
Operator Sound Pressure Level (ISO 6396:2008)*
72 dB(A)
72 dB(A)
Machine Sound Power Level (ISO 6395:2008)*
114 dB(A)
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
5240 mm
Height - Top of Exhaust Pipe
16.6 ft
5049 mm
Height - Top of Hood
12.7 ft
3862 mm
Ground Clearance
2.0 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
Equipment
Standard Equipment
Optional Equipment
