844 Wheel Dozer

Engine

Engine Model

Cat® C27

Net Power - SAE J1349:2011 - Standard Ambient

732 hp

Rated Speed

1,800 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 in

Stroke

6 in

Displacement

1,650 in³

Peak Torque - Speed

2,624 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

165,089 lb

Blade Capacity Range

21 yd³

Transmission

Transmission Type

Cat Planetary Power Shift

Converter Drive - Forward 1

5 mile/h

Converter Drive - Forward 2

8 mile/h

Converter Drive - Forward 3

14 mile/h

Converter Drive - Reverse 1

5 mile/h

Converter Drive - Reverse 2

9 mile/h

Converter Drive - Reverse 3

16 mile/h

Direct Drive - Forward 1

Lock-up disabled

Direct Drive - Forward 2

9 mile/h

Direct Drive - Forward 3

15 mile/h

Direct Drive - Reverse 1

5 mile/h

Direct Drive - Reverse 2

10 mile/h

Direct Drive - Reverse 3

16 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)

2,700 psi

Relief Valve Setting - Tilt Cylinders (Small Pump)

2,920 psi

Hydraulic System - Steering

Steering System - Circuit

Pilot, load sensing

Steering System - Pump

Piston, variable displacement

Minimum Turning Radius - Over Blade

34 ft

Total Steering Angle

35 °

Maximum Flow

94 gpm

Relief Valve Setting

4,500 psi

Service Refill Capacities

Fuel Tank - Standard

287 gal (US)

Cooling System

55 gal (US)

Crankcase

20 gal (US)

Transmission

29 gal (US)

Differential - Final Drives - Front

72 gal (US)

Differential - Final Drives - Rear

69 gal (US)

Hydraulic System - Implement and Hydraulic Fan

69 gal (US)

Hydraulic System - Steering and Braking

35 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 co

Axles

Front

Fixed

Rear

Trunnion

Oscillation Angle

9 °

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 ft

Height - Top of Exhaust Pipe

17 ft

Height - Top of Hood

13 ft

Ground Clearance

2 ft

Centerline of Front Axle to Hitch

8 ft

Centerline of Rear Axle to Edge of Bumper

13 ft

Wheel Base

15 ft

Length - With Blade on Ground

37 ft