844 Wheel Dozer
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.
Specifications
Equipment
Product Brochures
Attachments
Units:
Engine
Engine Model
C27 Cat®
Rated Speed
1800 r/min
1800 r/min
Gross Power - ISO 14396
752 hp
561 kW
Gross Power - SAE J1995
766 hp
571 kW
Net Power - SAE J1349 - Standard Ambient
699 hp
521 kW
Net Power - SAE J1349 - High Ambient
648 hp
483 kW
Bore
5.4 in
137.2 mm
Stroke
6 in
152.4 mm
Displacement
1649.5 in³
27.03 l
Peak Torque - Speed
2624 lb/ft
3557 N·m
Torque Rise
18 %
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 Specifications
Operating Weight
165089 lb
74883 kg
Blade Capacities
15.9 - 30.7 m3 (20.7 - 40.2 yd3)
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
Hydraulic System - Lift/Tilt
Output at 2,000 rpm and 6900 kPa (1,000 psi)
82 gal/min
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 ft
10369 mm
Total Steering Angle
35 °
35 °
Maximum Flow
94.3 gal/min
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 (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
8.5 °
8.5 °
Brakes
Brakes
Meets ISO 3540:2011
Sound Performance - Standard
Operator Sound Level (ISO 6396:2008)
69 dB(A)
69 dB(A)
Machine Sound Level (ISO 6395:2008)
115 dB(A)
115 dB(A)
Sound Performance - Suppression
Operator Sound Level (ISO 6396:2008)
69 dB(A)
69 dB(A)
Machine Sound Level (ISO 6395:2008)
113 dB(A)
113 dB(A)
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 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
Standard Equipment
NOTE
OPERATOR ENVIRONMENT
POWER TRAIN
ELECTRICAL
SERVICE
SAFETY
TRAMMING
OTHER
