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    844 Wheel Dozer
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    Engine
    Engine Model C27 Cat® - Cat® C3.6
    Rated Speed 1800 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 - -
    Stroke 6 in - -
    Displacement 1649.5 in³ - 220 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 - -
    Power - Net - - 92 HP
    Net Power - 2,200 rpm - SAE J1349 - - 92 HP
    Net Power - 2,200 rpm - ISO 9249/EEC 80/1269 - - 92 HP
    Note (1) - - Net power is tested per ISO 9249:2007 and SAE J1349:2011 and as advertised is the power available at the flywheel when the engine is equipped with fan, air intake system, exhaust system and alternator.
    Power Train - - Hydrostatic
    Note (2) - - All non-road U.S. EPA Tier 4 Final, EU Stage V, Japan 2014 (Tier 4 Final) and Korea Tier 4 Final diesel engines are required to use only Ultra Low Sulfur Diesel (ULSD) fuels containing 15 ppm EPA/10 ppm EU (mg/kg) sulfur or less.

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

    Transmission
    Transmission Type Cat Planetary Power Shift 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 - -
    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 -
    Drive Pumps - - 1
    Maximum Travel Speed - Forward - - 5.6 mile/h
    Relief Valve Settings - - 7033 psi
    Maximum Travel Speed - Reverse - - 6.2 mile/h
    Track Motors - - 2

    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) -
    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 - -
    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 -

    Hydraulic System - Steering
    Steering System - Circuit Pilot, load sensing Pilot, load sensing -
    Steering System - Pump Piston, variable displacement Variable displacement piston -
    Minimum Turning Radius - Over Blade 34 ft - -
    Total Steering Angle 35 ° 72° -
    Maximum Flow 94.3 gal/min - -
    Relief Valve Setting 4500 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) - -
    Cooling System 54.9 gal (US) - 5 gal (US)
    Crankcase 20 gal (US) - -
    Transmission 29.1 gal (US) 13.2 gal (US) -
    Differential - Final Drives - Front 71.6 gal (US) 17.2 gal (US) -
    Differential - Final Drives - Rear 68.9 gal (US) 17.2 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) 51.5 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) -
    Crankcase - With Filter - - 2.8 gal (US)
    Final Drive - Each - LGP - - 2.6 gal (US)
    Transmission - Hydraulic Tank - - 23.8 gal (US)
    Diesel Exhaust Fluid (DEF) Tank - - 4.9 gal (US)
    Final Drives - Each Side - - 2.6 gal (US)

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

    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 - -
    FOPS - - ISO 3449:2005 Level II
    ROPS - - ISO 3471:2008

    Dimensions (Approximate)
    Height - Top of ROPS 17.2 ft - -
    Height - Top of Exhaust Pipe 16.6 ft 11.3 ft -
    Height - Top of Hood 12.7 ft 8.7 ft -
    Ground Clearance 2 ft - -
    Centerline of Front Axle to Hitch 7.5 ft 5.5 ft -
    Centerline of Rear Axle to Edge of Bumper 12.5 ft - -
    Wheel Base 15.1 ft 11 ft -
    Length - With Blade on Ground 36.5 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 - - 18382 lb
    Operating Weight - LGP - - 19066 lb
    Note (2) - - For machine with ripper, add 554 kg (1,222 lb).
    Note (1) - - Specifications shown are for machine equipped with dozer blade, EROPS cab, back-up alarm, operator, coolant, lubricants and full fuel tank.

    Hydraulic Controls
    Pump Output - - 17.2 gal/min
    Relief Valve Settings - - 2988 psi

    Ripper
    Type - - Parallelogram
    Number of Shanks - - 3
    Height - - 6.5 in
    Weight - - 1222 lb
    Maximum Digging Depth - - 13.3 in
    Maximum Ground Clearance Under Tip - - 17.6 in
    Overall Width - - 67.3 in
    Maximum Reach - Ground Line - - 30.2 in

    Dimensions
    Length of Basic Dozer (without blade) - LGP - - 129.5 in
    Width of Dozer (standard shoes, no blade) - Standard - - 79.1 in
    Dozer Height - LGP - - 108.9 in
    Dozer Height - Standard - - 108.9 in
    Width of Dozer (standard shoes, no blade) - LGP - - 92.9 in
    Length of Basic Dozer (without blade) - Standard - - 129.5 in
    BLADE: Digging Depth - LGP - - 23.2 in
    BLADE: Blade Cutting Edge Angle, Adjustable - LGP - - 52° to 58°
    BLADE: Blade Lift Height - LGP - - 27.9 in
    BLADE: Blade Width - LGP - - 124 in
    BLADE: Blade Width at Maximum Angle - LGP - - 113.1 in
    Track Gauge - LGP - - 67.9 in
    Ground Clearance - LGP - - 13 in
    BLADE: Blade Height - LGP - - 35.8 in
    Overall Length - With Blade - LGP - - 168.2 in
    BLADE: Blade Capacity (SAE) - LGP - - 2.42 yd³
    BLADE: Maximum Tilt - LGP - - 17.2 in
    BLADE: Maximum Angle (either side) - LGP - - 25°
    BLADE: Maximum Angle (either side) - Standard - - 25°
    Ground Clearance - Standard - - 13 in
    Overall Length - With Blade - Standard - - 168.5 in
    Note - - With Ripper Attachment (add to Length of Basic Dozer) - 1177 mm (46.3 in)
    BLADE: Blade Cutting Edge Angle, Adjustable - Standard - - 52° to 58°
    BLADE: Maximum Tilt - Standard - - 15.2 in
    Track Gauge - Standard - - 61 in
    BLADE: Digging Depth - Standard - - 23.3 in
    BLADE: Blade Width - Standard - - 109.5 in
    BLADE: Blade Lift Height - Standard - - 29.3 in
    BLADE: Blade Capacity (SAE) - Standard - - 2.59 yd³
    BLADE: Blade Width at Maximum Angle - Standard - - 100.1 in
    BLADE: Blade Height - Standard - - 39.8 in

    Undercarriage
    Length - Track on Ground - LGP - - 89 in
    Track Gauge - - 61 in
    Number of Rollers - Each Side - - 7
    Track Gauge - LGP - - 68 in
    Ground Pressure - LGP - - 4.3 psi
    Shoe Width - Standard - - 18 in
    Shoe Width - LGP - - 25 in
    Number of Shoes - Each Side - Sealed and Lubricated Track (SALT) Undercarriage - - 43
    Number of Shoes - Each Side - Abrasion Undercarriage - - 38
    Ground Pressure - - 5.7 psi
    Length of Track on Ground - - 89 in

    Retrieval Winch
    Maximum Line Speed - Full Drum - - 79 ft/min
    Maximum Line Speed - Bare Drum - - 50 ft/min
    Weight - - 1747 lb
    Drum Capacity - Optional Cable - - 195 ft
    Rope Diameter - Recommended - - 0.63 in
    Winch Drive - - Hydraulic
    Rope Diameter - Optional - - 0.75 in
    Drum Capacity - Recommended Cable - - 277 ft
    Maximum Line Pull - Full Drum - - 20350 lb
    Speed - - Variable
    Maximum Line Pull - Bare Drum - - 32150 lb
    Control - - Hydraulic
    Overall width - - 27.91 in
    Drum Width - - 9.65 in
    Drum Diameter - - 8 in
    Winch Length - - 35.63 in
    Throat Clearance - - 5.6 in

    High Performance Winch
    Maximum line pull – bare drum - - 40000 lb
    Drum capacity – recommended cable - - 371 ft
    Winch length - - 27.76 in
    Overall width - - 29.2 in
    Control - - Hydraulic
    Maximum line speed – bare drum - - 131 ft/min
    Maximum line speed – full drum - - 207 ft/min
    Drum width - - 10.8 in
    Drum capacity – optional - - 256 ft
    Throat clearance - - 6.75 in
    Weight - - 1345 lb
    Rope diameter – recommended - - 0.63 in
    Speed - - Variable
    Maximum line pull – full drum - - 25000 lb
    Drum diameter - - 10 in
    Rope diameter – optional - - 0.75 in
    Winch drive - - Hydrostatic
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