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.
| Operating Weight | 74883 kg |
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| Blade Capacities | 15.9 - 30.7 m3 (20.7 - 40.2 yd3) |
| Engine Model | C27 Cat® |
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| Torque Rise | 18 % |
| Bore | 137.2 mm |
| Stroke | 152.4 mm |
| Displacement | 27.03 l |
| Rated Speed | 1800 r/min |
| 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 |
| Gross Power - ISO 14396 | 561 kW |
| Gross Power - SAE J1995 | 571 kW |
| Net Power - SAE J1349 - High Ambient | 483 kW |
| Net Power - SAE J1349 - Standard Ambient | 521 kW |
| Peak Torque - Speed | 3557 N·m |
| Height - Top of ROPS | 5240 mm |
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| Centerline of Front Axle to Hitch | 2300 mm |
| Centerline of Rear Axle to Edge of Bumper | 3795 mm |
| Length - With Blade on Ground | 11120 mm |
| Height - Top of Exhaust Pipe | 5049 mm |
| Height - Top of Hood | 3862 mm |
| Wheel Base | 4600 mm |
| Ground Clearance | 596 mm |
| Converter Drive - Forward 1 | 7.3 km/h |
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| 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 1 | Lock-up disabled |
| 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 |
| Transmission Type | Cat Planetary Power Shift |
| Cylinder, Double Acting - Tilt and Tip, Bore and Stroke | 210 mm × 188 mm (8.25 in × 7.4 in) |
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| 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) | 311 l/min |
| Relief Valve Setting - Bulldozer (Large Pump) | 18650 kPa |
| Relief Valve Setting - Tilt Cylinders (Small Pump) | 20150 kPa |
| Fuel Tank - Standard | 1085 l |
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| Cooling System | 208 l |
| Transmission | 110 l |
| Differential - Final Drives - Front | 271 l |
| Differential - Final Drives - Rear | 261 l |
| Crankcase | 76 l |
| Hydraulic System - Implement and Hydraulic Fan | 261 l |
| Hydraulic System - Steering and Braking | 132 l |
| Front | Fixed |
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| Oscillation Angle | 8.5 ° |
| Rear | Trunnion |
| Brakes | Meets ISO 3540:2011 |
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| 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. |
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| ROPS/FOPS | ISO 3471:2008 and ISO 3449:2005 Level II Standards |
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| Maximum Flow | 357 l/min |
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| Minimum Turning Radius - Over Blade | 10369 mm |
| Relief Valve Setting | 31000 kPa |
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Total Steering Angle | 35 ° |
| Machine Sound Level (ISO 6395:2008) | 115 dB(A) |
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| Operator Sound Level (ISO 6396:2008) | 69 dB(A) |
| Machine Sound Level (ISO 6395:2008) | 113 dB(A) |
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| Operator Sound Level (ISO 6396:2008) | 69 dB(A) |
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