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    844 Wheel Dozer
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    Engine
    Engine Model C27 Cat® - Cat C32B
    Rated Speed 1800 r/min - 1750 r/min
    Gross Power - ISO 14396 752 HP - -
    Gross Power - SAE J1995 766 HP - -
    Net Power - SAE J1349 - Standard Ambient 699 HP - -
    Net Power - SAE J1349 - High Ambient 648 HP - -
    Bore 5.4 in - 5.7 in
    Stroke 6 in - 6.4 in
    Displacement 1649.5 in³ - 1958 in²
    Peak Torque - Speed 2624 lb/ft - -
    Torque Rise 18 % - 30 %
    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 - - 907 HP
    Emissions (U.S. EPA Tier 4 Final): Gross Power - SAE J1995 - - 900 HP
    Emissions (U.S. EPA Tier 4 Final): Net Power ISO - 9249 - - 814 HP
    Emissions (Tier 2 Equivalent): Gross Power - SAE J1995 - - 907 HP
    Emissions (Tier 2 Equivalent): Net Power ISO - 9249 - - 823 HP
    Peak Torque - 1,200 rpm - - 3139 lb/ft
    Note (1) - - Net power advertised is the power available at the flywheel when the engine is equipped with fan, air cleaner, muffler and alternator.
    Note (2) - - Net torque rise meets SAE J139.
    Note (3) - - No engine derating required up to 3050 m (10,000 ft) altitude.

    Operating Specifications
    Operating Weight 165089 lb - 224647 lb
    Blade Capacities 15.9 - 30.7 m3 (20.7 - 40.2 yd3) - -

    Transmission
    Transmission Type Cat Planetary Power Shift Cat Planetary Power Shift Cat Planetary Power Shift
    Converter Drive - Forward 1 4.5 mile/h - 4.4 mile/h
    Converter Drive - Forward 2 8.3 mile/h - 7.7 mile/h
    Converter Drive - Forward 3 14.2 mile/h - 13.2 mile/h
    Converter Drive - Reverse 1 4.9 mile/h - 4.8 mile/h
    Converter Drive - Reverse 2 9.1 mile/h - 8.4 mile/h
    Converter Drive - Reverse 3 15.5 mile/h - 14.6 mile/h
    Direct Drive - Forward 1 Lock-up disabled - Lock-up disabled
    Direct Drive - Forward 2 8.5 mile/h - 8.1 mile/h
    Direct Drive - Forward 3 15.2 mile/h - 14.2 mile/h
    Direct Drive - Reverse 1 5.4 mile/h - 5 mile/h
    Direct Drive - Reverse 2 9.6 mile/h - 8.9 mile/h
    Direct Drive - Reverse 3 16.4 mile/h - 15.6 mile/h
    Forward - 1 - 3.7 mile/h -
    Forward - 2 - 6.5 mile/h -
    Forward - 3 - 11.2 mile/h -
    Forward - 4 - 19.4 mile/h -
    Reverse - 1 - 4.2 mile/h -
    Reverse - 2 - 7.3 mile/h -
    Reverse - 3 - 12.8 mile/h -
    Reverse - 4 - 22.1 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 gal/min - -
    Cylinders, Double Acting - Lift, Bore and Stroke 133 mm × 1535 mm (5.25 in × 60.4 in) 120 mm × 915 mm (4.7 in × 36.0 in) 177 mm × 1760 mm (0.58 ft × 5.8 ft)
    Cylinder, Double Acting - Tilt and Tip, Bore and Stroke 210 mm × 188 mm (8.25 in × 7.4 in) - 267 mm × 286 mm (0.88 ft × 0.94 ft)
    Relief Valve Setting - Bulldozer (Large Pump) 2700 psi - -
    Relief Valve Setting - Tilt Cylinders (Small Pump) 2920 psi - -
    Lift/Tilt System - Circuit - Pilot operated LS valve with EH -
    Lift/Tilt System - Variable displacement piston -
    Maximum Flow at 2,200 rpm - 23.5 gal/min -
    Relief Valve Setting - Lift/Tilt - 3190 psi -
    Cylinders, Double Acting - Left and Right Tilt, Bore and Stroke - 101.6 mm × 234 mm (4.0 in × 9.2 in) -
    Pilot System - Open center, fixed displacement gear -
    Pilot Relief Valve Setting - 3046 psi -
    Output at 1,850 rpm and 6900 kPa (1,000 psi) - - 161 gal/min

    Hydraulic System - Steering
    Steering System - Circuit Pilot, load sensing Pilot, load sensing Pilot, load sensing
    Steering System - Pump Piston, variable displacement Variable displacement piston Piston, variable displacement
    Minimum Turning Radius - Over Blade 34 ft - 31 ft
    Total Steering Angle 35 ° 72° 86 degrees
    Maximum Flow 94.3 gal/min - -
    Relief Valve Setting 4500 psi - 5004 psi
    Maximum Flow at 2,200 rpm - 38.8 gal/min -
    Relief Valve Setting - Steering - 4003 psi -
    Steering Cycle Times - High Idle - 3 s -
    Steering Cycle Times - Low Idle - 8.2 s -

    Service Refill Capacities
    Fuel Tank - Standard 286.6 gal (US) - 413 gal (US)
    Cooling System 54.9 gal (US) - 53 gal (US)
    Crankcase 20 gal (US) - 32 gal (US)
    Transmission 29.1 gal (US) 13.2 gal (US) 45 gal (US)
    Differential - Final Drives - Front 71.6 gal (US) 17.2 gal (US) 98 gal (US)
    Differential - Final Drives - Rear 68.9 gal (US) 17.2 gal (US) 90 gal (US)
    Hydraulic System - Implement and Hydraulic Fan 68.9 gal (US) - -
    Hydraulic System - Steering and Braking 34.9 gal (US) - -
    Fuel Tank - 132.1 gal (US) -
    Diesel Exhaust Fluid Tank - 4.2 gal (US) -
    Cooling Systems - Tier 4 Final/EU Stage V - 21.4 gal (US) -
    Cooling Systems - Brazil MAR-1 and China NonroadStage III, equivalent to Tier 3/EU Stage IIIA - 19.3 gal (US) -
    Engine Crankcase - 5.3 gal (US) -
    Hydraulic System - Implement/Steering - 34.1 gal (US) -
    Hydraulic Tank Only - 19.8 gal (US) -
    Hydraulic System - Steering and Engine Cooling Fan - Tank Only - - 77 gal (US)
    Note (1) - - - All nonroad U.S. EPA Tier 4, European Union (EU) Stage IIIB and V, and Japan (MLIT) Step 4 diesel engines are required to use only Ultra Low Sulfer Diesel (ULSD) fuels containing 15 ppm (mg/kg) sulfer or less. Biodiesel blends up to B20 (20% blend by vo

    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. - 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 Planetary – Fixed Fixed
    Rear Trunnion Planetary – Oscillating Trunnion
    Oscillation Angle 8.5 ° ±10° -

    Brakes
    Brakes Meets ISO 3540:2011 - 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 - ISO 3471:2008 and ISO 3449:2005 Level II Standards

    Dimensions (Approximate)
    Height - Top of ROPS 17.2 ft - 18.25 ft
    Height - Top of Exhaust Pipe 16.6 ft 11.3 ft 17.17 ft
    Height - Top of Hood 12.7 ft 8.7 ft 13 ft
    Ground Clearance 2 ft - 27 in
    Centerline of Front Axle to Hitch 7.5 ft 5.5 ft 9.67 ft
    Centerline of Rear Axle to Edge of Bumper 12.5 ft - 13.75 ft
    Wheel Base 15.1 ft 11 ft 19.25 ft
    Length - With Blade on Ground 36.5 ft - 44 ft
    Height to Top of Beacon - 13.1 ft -
    Height - Top of Cab - 12.1 ft -
    Height to Top of Radiator Guard - 8 ft -
    Ground Clearance to Hitch - 1.4 ft -
    Ground Clearance to Transmission Guard - 1.4 ft -
    Ground Clearance to Bottom of Bumper - 2.3 ft -
    Centerline of Rear Axle to Bumper - 6.5 ft -
    Width over Platform - 10.3 ft -
    Overall Length to Front Tire - 21 ft -
    Overall Machine Length with Straight Blade - 23.6 ft -
    Overall Machine Length with Coal Blade - 25.5 ft -

    Engine - Tier 4 Final/EU Stage V
    Engine Model - Cat C7.1 -
    Net Power (SAE J1349:2011) - 249 HP -
    Net Power (ISO 9249:2007) - 249 HP -
    Emissions - U.S. EPA Tier 4 Final/EU Stage V -
    Rated Speed - 2200 r/min -
    Gross Power (SAE J1995:2014) - 284 HP -
    Engine Power (ISO 14396:2002) - 275 HP -
    Peak Torque - 1,400 rpm - 902 lb/ft -
    Torque Rise - 52% -
    Bore - 4.1 in -
    Stroke - 5.3 in -
    Displacement - 427.8 in³ -
    High Idle Speed - 2270 r/min -
    Low Idle Speed - 800 r/min -
    Maximum Altitude without Derating - 9842.5 ft -
    Note - Net power advertised is the power available at the engine flywheel when the engine is equipped with a fan, air cleaner, clean emissions module and alternator. -

    Operating Specifications - Tier 4 Final/EU Stage V
    Operating Weight - 48526 lb -

    Scoops
    Chip Scoop Doze Capacity - 37.9 yd³ -
    Chip Scoop Carry Capacity - 19 yd³ -

    Engine - Brazil Mar-1 and China Nonroad Stage III, Equivalent to Tier 3/EU Stage IIIA
    Engine Model - Cat C7.1 -
    Emissions - Brazil MAR-1 and China Nonroad Stage III, equivalent to Tier 3/EU Stage IIIA -
    Rated Speed - 2200 r/min -
    Net Power (SAE J1349:2011) - 249 HP -
    Gross Power (SAE J1995:2014) - 286 HP -
    Engine Power (ISO 14396:2002) - 275 HP -
    Peak Torque - 1,400 rpm - 749 lb/ft -
    Torque Rise - 26% -
    Bore - 4.1 in -
    Stroke - 5.3 in -
    Displacement - 427.8 in³ -
    High Idle Speed - 2270 r/min -

    Operating Specifications - Brazil Mar-1 and China Nonroad Stage III, Equivalent to Tier 3/EU Stage IIIA
    Operating Weight - 47887 lb -

    Operating Specifications - Tier 4 Final/EU Stage V - Scoop
    Operating Weight - 52280 lb -

    Operating Specifications - Brazil Mar-1 and China Nonroad Stage III, Equivalent to Tier 3/EU Stage IIIA - Scoop
    Operating Weight - 51639 lb -

    Braking System
    Service Brakes - Single Disc Wet (enclosed) 4 WHL -
    Parking Brake - Drum and Shoe, Spring Applied, Hydraulic Released -

    Sound Performance - Tier 4 Final/EU Stage V - Standard
    Operator Sound Level (ISO 6396) - 70 dB(A) -
    Machine Sound Level (ISO 6395) - 111 dB(A) -
    Note (1) - The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (2) - 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. -
    Note (3) - The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (4) - The operator sound pressure level uncertainty is ± 2 dB(A) -

    Sound Performance - Tier 4 Final/EU Stage V - Suppression
    Operator Sound Level (ISO 6396) - 70 dB(A) -
    Machine Sound Level (ISO 6395) - 109 dB(A) -
    Note (1) - The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (2) - 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. -
    Note (3) - The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (4) - The operator sound pressure level uncertainty is ± 2 dB(A). -

    Sound Performance - Brazil Mar-1 and China Nonroad Stage III, Equivalent to Tier 3/EU Stage IIIA - Standard
    Operator Sound Level (ISO 6396) - 70 dB(A) -
    Machine Sound Level (ISO 6395) - 112 dB(A) -
    Note (1) - The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (2) - 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. -
    Note (3) - The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (4) - The operator sound pressure level uncertainty is ± 2 dB(A). -

    Sound Performance - Brazil Mar-1 and China Nonroad Stage III, Equivalent to Tier 3/EU Stage IIIA - Suppression
    Operator Sound Level (ISO 6396) - 70 dB(A) -
    Machine Sound Level (ISO 6395) - 110 dB(A) -
    Note (1) - The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (2) - 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. -
    Note (3) - The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at the maximum engine cooling fan speed. -
    Note (4) - The operator sound pressure level uncertainty is ± 2 dB(A). -

    Weights
    Operating Weight - - 224647 lb

    Blades
    Blade Capacities - - 30.5 to 44.8 m3 (40 to 58.6 yd3)

    Sound Performance Levels
    Sound Performance - - • 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. • The operator sound pressure level was measured according to ISO 6396:2008. The measurement was
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