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844

Wheel Dozers

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.

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Engine Model C27 Cat®
Rated Speed 1800 r/min
Gross Power - ISO 14396 561 kW
Gross Power - SAE J1995 571 kW
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844
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OVERVIEW

Mobile. Agile. Versatile.

FEATURES & BENEFITS

Long Term Value and Durability

Struktur yang KokohUnmatched Durability     The full box-section rear frame resists torsional shock and twisting forces.     Soli... Read more

Move More with Less Fuel

Transmisi Powershift Planetary CatOptimum Efficiency     Experience reliable efficiency with complete control over injection timing, duration, and pr... Read more

Safety First

Lingkungan OperatorIncreased Safety     Battery disconnect, emergency engine shutdown, and stairway light switch are accessed through the ground leve... Read more

Technology that Gets Work Done

Terrain untuk PemuatanInnovative Technology     Integrated technologies allow you to monitor, manage, and enhance your jobsite operations.  &nbs... Read more

Work In Comfort

Enhanced Operator Comfort     Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steerin... Read more

Reduce Environmental Impact

Manfaat yang BerkelanjutanImproved Sustainability     Meets U.S. EPA Tier 4 Final emissions standards.     Emits up to 18% less C... Read more

Save on Service and Maintenance

Kami dapat membantu Anda meraih sukses dengan memastikan 844K memiliki fitur desain untuk mengurangi waktu henti.Simplified Maintenance     Swing-out... Read more

Purpose-Built Cat Attachments

Semi-U Tugas BeratBuilt for Your Operation     Dependable blades are designed for mining with press rib construction and optimized widths and capacit... Read more

SPECIFICATIONS FOR 844

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Engine
Engine Model C27 Cat®
Rated Speed 1800 r/min
Gross Power - ISO 14396 561 kW
Gross Power - SAE J1995 571 kW
Net Power - SAE J1349 - Standard Ambient 521 kW
Net Power - SAE J1349 - High Ambient 483 kW
Bore 137.2 mm
Stroke 152.4 mm
Displacement 27.03 l
Peak Torque - Speed 3557 N·m
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 Specifications
Operating Weight 74883 kg
Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3)
Transmission
Direct Drive - Forward 1 Lock-up disabled
Transmission Type Cat Planetary Power Shift
Converter Drive - Forward 1 7.3 km/h
Converter Drive - Forward 2 13.3 km/h
Converter Drive - Forward 3 22.9 km/h
Converter Drive - Reverse 1 7.9 km/h
Converter Drive - Reverse 2 14.7 km/h
Converter Drive - Reverse 3 24.9 km/h
Direct Drive - Forward 2 13.7 km/h
Direct Drive - Forward 3 24.5 km/h
Direct Drive - Reverse 1 8.7 km/h
Direct Drive - Reverse 2 15.4 km/h
Direct Drive - Reverse 3 26.4 km/h
Hydraulic System - Lift/Tilt
Output at 2,000 rpm and 6900 kPa (1,000 psi) 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) 18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump) 20150 kPa
Hydraulic System - Steering
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Minimum Turning Radius - Over Blade 10369 mm
Total Steering Angle 35 °
Maximum Flow 357 l/min
Relief Valve Setting 31000 kPa
Service Refill Capacities
Fuel Tank - Standard 1085 l
Cooling System 208 l
Crankcase 76 l
Transmission 110 l
Differential - Final Drives - Front 271 l
Differential - Final Drives - Rear 261 l
Hydraulic System - Implement and Hydraulic Fan 261 l
Hydraulic System - Steering and Braking 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 °
Brakes
Brakes Meets ISO 3540:2011
Sound Performance - Standard
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 115 dB(A)
Sound Performance - Suppression
Operator Sound Level (ISO 6396:2008) 69 dB(A)
Machine Sound Level (ISO 6395:2008) 113 dB(A)
Cab
ROPS/FOPS ISO 3471:2008 and ISO 3449:2005 Level II Standards
Dimensions (Approximate)
Height - Top of ROPS 5240 mm
Height - Top of Exhaust Pipe 5049 mm
Height - Top of Hood 3862 mm
Ground Clearance 596 mm
Centerline of Front Axle to Hitch 2300 mm
Centerline of Rear Axle to Edge of Bumper 3795 mm
Wheel Base 4600 mm
Length - With Blade on Ground 11120 mm
Kabin
Kabin - ROPS/FOPS (1) kW

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Emissions (U.S. EPA Tier 4 Final): Gross Power - SAE J1995 671 kW
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Stroke 171.4 mm
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Gross Power 512 kW
Net Power 468 kW
Bore 137 mm
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Peak Power Speed 1500 r/min
Gross Power - SAE J1995 419 kW
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Gross Power 561 kW
Bore 137.2 mm
Stroke 152.4 mm
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