Caterpillar 844K Large Wheel Dozers

Specifications of Caterpillar 844K Large Wheel Dozers

Engine

• Bore 137.2 mm
• Displacement 27.03 L
• Emissions U.S. EPA Tier 4 Final or Tier 2 Equivalent
• Engine Model Cat® C27 ACERT™
• Gross Power 561.0 kW
• Gross Power - ISO 14396 561.0 kW
• Gross Power - SAE J1995 571.0 kW
• Net Power - SAE J1349 521.0 kW
• Peak Torque @ (speed) 3557.0 N·m
• Rated Speed 1800.0 RPM
• Rated Speed - Net Power - SAE J1349 (High Ambient) 483.0 kW
• Rated Speed - Net Power - SAE J1349 (Standard Ambient) 521.0 kW
• Stroke 152.4 mm
• Torque Rise 18.0 %

Weights

• Operating Weight 74883.0 kg

Transmission

• 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 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

Service Refill Capacities

• Cooling System 208.0 L
• Crankcase 76.0 L
• Differentials and Final Drives - Front 271.0 L
• Differentials and Final Drives - Rear 261.0 L
• Fuel Tank - Standard 1085.0 L
• Hydraulic System - Implement and Hydraulic Fan 261.0 L
• Hydraulic System - Steering and Braking 132.0 L
• Transmission 110.0 L

Axles

• Front Fixed
• Oscillation Angle 8.5 Degrees
• Rear Trunnion

Brakes

• Brakes Meets ISO 3540:2011

Dimensions (Approximate)

• Center Line of Front Axle to Hitch 2300.0 mm
• Center Line of Rear Axle to Edge of Bumper 3795.0 mm
• Ground Clearance 596.0 mm
• Height to Top of Exhaust Pipe 5049.0 mm
• Height to Top of Hood 3862.0 mm
• Height to Top of ROPS 5240.0 mm
• Length with Blade on Ground 11120.0 mm
• Wheelbase 4600.0 mm

Cab

• Air Conditioning Standard air conditioning system contains environmentally friendly R134a refrigerant
• Cab - ROPS/FOPS Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
• Cab – ROPS/FOPS SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994
• FOPS FOPS meets SAE J231 JAN81 and ISO 3449:1992 Level II criteria.
• ROPS ROPS meets SAE J11040 APR88, ISO 3471:2008 and ISO 3471:1994 criteria.

Blades

• Blade Capacity Range 15.9-30.7 m3 (20.7-40.2 yd3)

HYDRAULIC SYSTEM - LIFT/TILT

• Cylinder, 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)
• Output at 2,000 rpm and 6900 kPa (1,000 psi) 311.0 L/min
• Relief Valve Setting - Bulldozer (Large Pump) 18650.0 kPa
• Relief Valve Setting - Tilt Cylinders (Small Pump) 20150.0 kPa

HYDRAULIC SYSTEM - STEERING

• Maximum Flow 357.0 L/min
• Minimum Turning Radius (over blade) 10369.0 mm
• Relief Valve Setting 31000.0 kPa
• Steering System - Circuit Pilot, load sensing
• Steering System - Pump Piston, variable displacement
• Total Steering Angle 35.0 Degrees

SOUND PERFORMANCE - STANDARD

• Machine Sound Level (ISO 6395:2008) 115.0 dB(A)
• Operator Sound Level (ISO 6396:2008) 69.0 dB(A)

SOUND PERFORMANCE - SUPPRESSION

• Machine Sound Level (ISO 6395:2008) 113.0 dB(A)
• Operator Sound Level (ISO 6396:2008) 69.0 dB(A)