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844 Wheel Dozer

844 Wheel Dozer

Mobile. Agile. Versatile.

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More Comfort – More Performance – More Versatility

  • 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

Engine

Bore 5.4 in
Displacement 1649.5 in³
Emissions Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Emissions Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
Engine Model Cat® C27
Engine Power - ISO 14396: 2002 752 hp
Engine Power - ISO 14396:2002 786 hp
Gross Power - SAE J1995:2014 801 hp
Gross Power - SAE J1995:2014 766 hp
Net Power - SAE J1349:2011 - High Ambient 681 hp
Net Power - SAE J1349:2011 - High Ambient 648 hp
Net Power - SAE J1349:2011 - Standard Ambient 732 hp
Net Power - SAE J1349:2011 - Standard Ambient 699 hp
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.
Peak Torque - Speed 2624 lb/ft
Rated Speed 1800 r/min
Stroke 6 in
Torque Rise 18 %

Operating Specifications

Blade Capacity Range 20.8 yd³
Operating Weight 165089 lb

Transmission

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.
Transmission Type Cat Planetary Power Shift

Hydraulic System - Lift/Tilt

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

Hydraulic System - Steering

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

Service Refill Capacities

Cooling System 54.9 gal (US)
Crankcase 20 gal (US)
Differential - Final Drives - Front 71.6 gal (US)
Differential - Final Drives - Rear 68.9 gal (US)
Fuel Tank - Standard 286.6 gal (US)
Hydraulic System - Implement and Hydraulic Fan 68.9 gal (US)
Hydraulic System - Steering and Braking 34.9 gal (US)
Transmission 29.1 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
Oscillation Angle 8.5 °
Rear Trunnion

Brakes

Brakes Meets ISO 3540:2011

Sound Performance - Tier 4 Final / Stage V

Machine Sound Power Level (ISO 6395:2008) 116 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)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A)

Sound Performance - Tier 2

Machine Sound Power Level (ISO 6395:2008) 116 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)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A)

Cab

ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

Centerline of Front Axle to Hitch 7.5 ft
Centerline of Rear Axle to Edge of Bumper 12.5 ft
Ground Clearance 2 ft
Height - Top of Exhaust Pipe 16.6 ft
Height - Top of Hood 12.7 ft
Height - Top of ROPS 17.2 ft
Length - With Blade on Ground 36.5 ft
Wheel Base 15.1 ft

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844 Wheel Dozer - Product Brochure (Global)
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844 Wheel Dozer - Technical Specifications (Global)
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Engine

Bore 5.4 in
Displacement 1649.5 in³
Emissions Option 1 - U.S. EPA Tier 4 Final / EU Stage V
Emissions Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
Engine Model Cat® C27
Engine Power - ISO 14396: 2002 752 hp
Engine Power - ISO 14396:2002 786 hp
Gross Power - SAE J1995:2014 801 hp
Gross Power - SAE J1995:2014 766 hp
Net Power - SAE J1349:2011 - High Ambient 681 hp
Net Power - SAE J1349:2011 - High Ambient 648 hp
Net Power - SAE J1349:2011 - Standard Ambient 732 hp
Net Power - SAE J1349:2011 - Standard Ambient 699 hp
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.
Peak Torque - Speed 2624 lb/ft
Rated Speed 1800 r/min
Stroke 6 in
Torque Rise 18 %

Operating Specifications

Blade Capacity Range 20.8 yd³
Operating Weight 165089 lb

Transmission

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.
Transmission Type Cat Planetary Power Shift

Hydraulic System - Lift/Tilt

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

Hydraulic System - Steering

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

Service Refill Capacities

Cooling System 54.9 gal (US)
Crankcase 20 gal (US)
Differential - Final Drives - Front 71.6 gal (US)
Differential - Final Drives - Rear 68.9 gal (US)
Fuel Tank - Standard 286.6 gal (US)
Hydraulic System - Implement and Hydraulic Fan 68.9 gal (US)
Hydraulic System - Steering and Braking 34.9 gal (US)
Transmission 29.1 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
Oscillation Angle 8.5 °
Rear Trunnion

Brakes

Brakes Meets ISO 3540:2011

Sound Performance - Tier 4 Final / Stage V

Machine Sound Power Level (ISO 6395:2008) 116 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)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A)

Sound Performance - Tier 2

Machine Sound Power Level (ISO 6395:2008) 116 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)
Operator Sound Pressure Level (ISO 6396:2008)* 72 dB(A)

Cab

ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

Centerline of Front Axle to Hitch 7.5 ft
Centerline of Rear Axle to Edge of Bumper 12.5 ft
Ground Clearance 2 ft
Height - Top of Exhaust Pipe 16.6 ft
Height - Top of Hood 12.7 ft
Height - Top of ROPS 17.2 ft
Length - With Blade on Ground 36.5 ft
Wheel Base 15.1 ft

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