844 Wheel Dozer

Overview

Cat Wheel Dozers are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a lower cost per ton. Engineered for your demanding work in large dozing applications, the 844 Wheel Dozer is the largest in the Cat Wheel Dozer line and is an ideal match for large mining operations, power generating utilities, the general contracting industry and wherever mobility, versatility and compaction is needed.

Key Features

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

UP TO 18% LESS CO2 EMISSIONS

The 844 emits up to 18% less CO2 than the previous 844H.

Media Gallery

Specifications

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

Operating Weight	165089 lb
Blade Capacities	15.9 - 30.7 m3 (20.7 - 40.2 yd3)

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

Output at 2,000 rpm and 6900 kPa (1,000 psi)	82 gal/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
Relief Valve Setting - Tilt Cylinders (Small Pump)	2920 psi

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	94.3 gal/min
Relief Valve Setting	4500 psi

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	The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Front	Fixed
Rear	Trunnion
Oscillation Angle	8.5 °

Brakes	Meets ISO 3540:2011

Operator Sound Level (ISO 6396:2008)	69 dB(A)
Machine Sound Level (ISO 6395:2008)	115 dB(A)

Operator Sound Level (ISO 6396:2008)	69 dB(A)
Machine Sound Level (ISO 6395:2008)	113 dB(A)

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

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 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