Wheel Dozers

844K Wheel Dozer

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Specification Summary

Engine Model
Cat® C27 ACERT™
Gross Power
752 HP
Operating Weight
165089 lb
Bore
5.4 in
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Engine

Engine Model
Cat® C27 ACERT™
Gross Power
752 HP
Bore
5.4 in
Stroke
6 in
Displacement
1649.5 in³
Torque Rise
18 %
Emissions
U.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396
752 HP
Gross Power - SAE J1995
766 HP
Net Power - SAE J1349
699 HP
Net Power - SAE J1349 - High Ambient
648 HP
Net Power - SAE J1349 - Standard Ambient
699 HP
Peak Torque - Speed
2624 lb/ft
Rated Speed
1800 r/min

Weights

Operating Weight
165089 lb

Transmission

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 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
Direct Drive - Forward 1
Lock-up disabled
Transmission Type
Cat Planetary Power Shift

Service Refill Capacities

Fuel Tank - Standard
286.6 gal (US)
Cooling System
54.9 gal (US)
Crankcase
20 gal (US)
Transmission
29.1 gal (US)
Differential - Final Drives - Front
71.6 gal (US)
Differential - Final Drives - Rear
68.9 gal (US)
Hydraulic System - Implement and Hydraulic Fan
68.9 gal (US)
Hydraulic System - Steering and Braking
34.9 gal (US)

Cab

Air Conditioning
Standard air conditioning system contains environmentally friendly R134a refrigerant
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.
Cab - ROPS/FOPS (1)
Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
Cab - ROPS/FOPS (2)
SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994

Brakes

Brakes
Meets ISO 3540:2011

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
8.5 °

Blade

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

Sound Performance - Standard

Machine Sound Level (ISO 6395:2008)
115 dB(A)
Operator Sound Level (ISO 6396:2008)
69 dB(A)

Sound Performance - Suppression

Machine Sound Level (ISO 6395:2008)
113 dB(A)
Operator Sound Level (ISO 6396:2008)
69 dB(A)

Hydraulic System - Lift/Tilt

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)
Output at 2,000 rpm and 6900 kPa (1,000 psi)
82 gal/min
Relief Valve Setting - Bulldozer (Large Pump)
2700 psi
Relief Valve Setting - Tilt Cylinders (Small Pump)
2920 psi

Hydraulic System - Steering

Maximum Flow
94.3 gal/min
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
35 °
Minimum Turning Radius - Over Blade
34 ft
Relief Valve Setting
4500 psi

Dimensions (Approximate)

Centerline of Front Axle to Hitch
7.5 ft
Centerline of Rear Axle to Edge of Bumper
12.5 ft
Ground Clearance
2 ft
Height - Top of Exhaust Pipe
16.6 ft
Height - Top of Hood
12.7 ft
Height - Top of ROPS
17.2 ft
Length - With Blade on Ground
36.5 ft
Wheel Base
15.1 ft
Engine Model
Cat® C27 ACERT™
Gross Power
752 HP
Bore
5.4 in
Stroke
6 in
Displacement
1649.5 in³
Torque Rise
18 %
Emissions
U.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396
752 HP
Gross Power - SAE J1995
766 HP
Net Power - SAE J1349
699 HP
Net Power - SAE J1349 - High Ambient
648 HP
Net Power - SAE J1349 - Standard Ambient
699 HP
Peak Torque - Speed
2624 lb/ft
Rated Speed
1800 r/min
Operating Weight
165089 lb
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 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
Direct Drive - Forward 1
Lock-up disabled
Transmission Type
Cat Planetary Power Shift
Fuel Tank - Standard
286.6 gal (US)
Cooling System
54.9 gal (US)
Crankcase
20 gal (US)
Transmission
29.1 gal (US)
Differential - Final Drives - Front
71.6 gal (US)
Differential - Final Drives - Rear
68.9 gal (US)
Hydraulic System - Implement and Hydraulic Fan
68.9 gal (US)
Hydraulic System - Steering and Braking
34.9 gal (US)
Air Conditioning
Standard air conditioning system contains environmentally friendly R134a refrigerant
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.
Cab - ROPS/FOPS (1)
Cat cab with separate ROPS/FOPS is standard in North America, Europe and Japan.
Cab - ROPS/FOPS (2)
SAE J11040 APR88, ISO 3471:2008, ISO 3471:1994
Brakes
Meets ISO 3540:2011
Front
Fixed
Rear
Trunnion
Oscillation Angle
8.5 °
Blade Capacity Range
15.9-30.7 m3 (20.7-40.2 yd3)
Machine Sound Level (ISO 6395:2008)
115 dB(A)
Operator Sound Level (ISO 6396:2008)
69 dB(A)
Machine Sound Level (ISO 6395:2008)
113 dB(A)
Operator Sound Level (ISO 6396:2008)
69 dB(A)
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)
Output at 2,000 rpm and 6900 kPa (1,000 psi)
82 gal/min
Relief Valve Setting - Bulldozer (Large Pump)
2700 psi
Relief Valve Setting - Tilt Cylinders (Small Pump)
2920 psi
Maximum Flow
94.3 gal/min
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
35 °
Minimum Turning Radius - Over Blade
34 ft
Relief Valve Setting
4500 psi
Centerline of Front Axle to Hitch
7.5 ft
Centerline of Rear Axle to Edge of Bumper
12.5 ft
Ground Clearance
2 ft
Height - Top of Exhaust Pipe
16.6 ft
Height - Top of Hood
12.7 ft
Height - Top of ROPS
17.2 ft
Length - With Blade on Ground
36.5 ft
Wheel Base
15.1 ft