Large Wheel Dozers

844K Wheel Dozer

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844K Wheel Dozer
US
Metric

Overview

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 844K 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.

Engine

Engine Model
Cat® C27 ACERT™
Gross Power
752.00 hp
561.00 kW
Bore
5.40 in
137.20 mm
Stroke
6.00 in
152.40 mm
Displacement
1649.50 in3
27.03 L
Torque Rise
18.00 %
18.00 %
Emissions
U.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396
752.00 hp
561.00 kW
Gross Power - SAE J1995
766.00 hp
571.00 kW
Net Power - SAE J1349
699.00 hp
521.00 kW
Net Power - SAE J1349 (High Ambient)
648.00 hp
483.00 kW
Net Power - SAE J1349 (Standard Ambient)
699.00 hp
521.00 kW
Peak Torque @ (speed)
2624.00 lb ft
3557.00 N·m
Rated Speed
1800.00 RPM
1800.00 RPM

Weights

Operating Weight
165089.00 lb
74883.00 kg

Transmission

Converter Drive - Forward 1
4.50 mph
7.30 km/h
Converter Drive - Forward 2
8.30 mph
13.30 km/h
Converter Drive - Forward 3
14.20 mph
22.90 km/h
Converter Drive - Reverse 1
4.90 mph
7.90 km/h
Converter Drive - Reverse 2
9.10 mph
14.70 km/h
Converter Drive - Reverse 3
15.50 mph
24.90 km/h
Direct Drive - Forward 2
8.50 mph
13.70 km/h
Direct Drive - Forward 3
15.20 mph
24.50 km/h
Direct Drive - Reverse 1
5.40 mph
8.70 km/h
Direct Drive - Reverse 2
9.60 mph
15.40 km/h
Direct Drive - Reverse 3
16.40 mph
26.40 km/h
Direct Drive - Forward 1
Lock-up disabled
Transmission Type
Cat Planetary Power Shift

Service Refill Capacities

Fuel Tank - Standard
286.60 gal
1085.00 L
Cooling System
54.90 gal
208.00 L
Crankcase
20.00 gal
76.00 L
Transmission
29.10 gal
110.00 L
Differentials and Final Drives - Front
71.60 gal
271.00 L
Differentials and Final Drives - Rear
68.90 gal
261.00 L
Hydraulic System - Implement and Hydraulic Fan
68.90 gal (US)
261.00 l
Hydraulic System - Steering and Braking
34.90 gal (US)
132.00 l

Cab

Air Conditioning
Standard air conditioning system contains environmentally friendly R134a refrigerant
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
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.

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
8.50 Degrees
8.50 Degrees

Brakes

Brakes
Meets ISO 3540:2011

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)
82.00 gal/min
311.00 l/min
Relief Valve Setting - Bulldozer (Large Pump)
2700.00 psi
18650.00 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump)
2920.00 psi
20150.00 kPa

Sound Performance - Suppression

Machine Sound Level (ISO 6395:2008)
113.00 dB(A)
113.00 dB(A)
Operator Sound Level (ISO 6396:2008)
69.00 dB(A)
69.00 dB(A)

Hydraulic System - Steering

Maximum Flow
94.30 gal/min
357.00 L/min
Minimum Turning Radius - Over Blade
34.00 ft
10369.00 mm
Relief Valve Setting
4500.00 psi
31000.00 kPa
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
35.00 Degrees
35.00 Degrees

Dimensions (Approximate)

Center Line of Front Axle to Hitch
7.50 ft
2300.00 mm
Center Line of Rear Axle to Edge of Bumper
12.50 ft
3795.00 mm
Ground Clearance
2.00 ft
596.00 mm
Height to Top of Exhaust Pipe
16.60 ft
5049.00 mm
Height to Top of Hood
12.70 ft
3862.00 mm
Height to Top of ROPS
17.20 ft
5240.00 mm
Length with Blade on Ground
36.50 ft
11120.00 mm
Wheelbase
15.10 ft
4600.00 mm

Sound Performance - Standard

Machine Sound Level (ISO 6395:2008)
115.00 dB(A)
115.00 dB(A)
Operator Sound Level (ISO 6396:2008)
69.00 dB(A)
69.00 dB(A)

Blade

Blade Capacity Range
15,9-30,7 m3 (20,7-40,2 yd.3)

Engine

Engine Model
C27 Cat®
Gross Power
752.00 HP
561.00 kW
Bore
5.40 in
137.20 mm
Stroke
6.00 in
152.40 mm
Displacement
1649.50 in³
27.03 l
Torque Rise
18.00 %
18.00 %
Emissions
U.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396
752.00 HP
561.00 kW
Gross Power - SAE J1995
766.00 HP
571.00 kW
Net Power - SAE J1349
699.00 HP
521.00 kW
Net Power - SAE J1349 - High Ambient
648.00 HP
483.00 kW
Net Power - SAE J1349 - Standard Ambient
699.00 HP
521.00 kW
Peak Torque - Speed
2624.00 lb/ft
3557.00 N·m
Rated Speed
1800.00 r/min
1800.00 r/min

Weights

Operating Weight
165089.00 lb
74883.00 kg

Transmission

Converter Drive - Forward 1
4.50 mile/h
7.30 km/h
Converter Drive - Forward 2
8.30 mile/h
13.30 km/h
Converter Drive - Forward 3
14.20 mile/h
22.90 km/h
Converter Drive - Reverse 1
4.90 mile/h
7.90 km/h
Converter Drive - Reverse 2
9.10 mile/h
14.70 km/h
Converter Drive - Reverse 3
15.50 mile/h
24.90 km/h
Direct Drive - Forward 2
8.50 mile/h
13.70 km/h
Direct Drive - Forward 3
15.20 mile/h
24.50 km/h
Direct Drive - Reverse 1
5.40 mile/h
8.70 km/h
Direct Drive - Reverse 2
9.60 mile/h
15.40 km/h
Direct Drive - Reverse 3
16.40 mile/h
26.40 km/h
Direct Drive - Forward 1
Lock-up disabled
Transmission Type
Cat Planetary Power Shift

Service Refill Capacities

Fuel Tank - Standard
286.60 gal (US)
1085.00 l
Cooling System
54.90 gal (US)
208.00 l
Crankcase
20.00 gal (US)
76.00 l
Transmission
29.10 gal (US)
110.00 l
Differential - Final Drives - Front
71.60 gal (US)
271.00 l
Differential - Final Drives - Rear
68.90 gal (US)
261.00 l

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.

Brakes

Brakes
Meets ISO 3540:2011

Axles

Front
Fixed
Rear
Trunnion
Oscillation Angle
8.50 °
8.50 °

Sound Performance - Standard

Machine Sound Level (ISO 6395:2008)
115.00 dB(A)
115.00 dB(A)
Operator Sound Level (ISO 6396:2008)
69.00 dB(A)
69.00 dB(A)

Sound Performance - Suppression

Machine Sound Level (ISO 6395:2008)
113.00 dB(A)
113.00 dB(A)
Operator Sound Level (ISO 6396:2008)
69.00 dB(A)
69.00 dB(A)

Hydraulic System - Lift/Tilt

Cylinders, Double Acting - Lift, Bore and Stroke
133 mm × 1535 mm (5.25 in × 60.4 in)

Hydraulic System - Steering

Maximum Flow
94.30 gal/min
357.00 l/min
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Total Steering Angle
35.00 °
35.00 °

Dimensions (Approximate)

Centerline of Front Axle to Hitch
7.50 ft
2300.00 mm
Centerline of Rear Axle to Edge of Bumper
12.50 ft
3795.00 mm
Ground Clearance
2.00 ft
596.00 mm
Height - Top of Exhaust Pipe
16.60 ft
5049.00 mm
Height - Top of Hood
12.70 ft
3862.00 mm
Height - Top of ROPS
17.20 ft
5240.00 mm
Length - With Blade on Ground
36.50 ft
11120.00 mm
Wheel Base
15.10 ft
4600.00 mm
Features

Long Term Value and Durability

Built to Perform

Performance and Productivity

Work In Comfort

Integrated Cat® Technologies

Technology that Gets Work Done

Safety First

Save on Service and Maintenance

Top-Tier Service and Support

Reduce Environmental Impact

Purpose-Built Cat Attachments

Sales Features

Structures

Best built for the toughest conditions.

Power Train

Move material more efficiently with improved power and control.

Hydraulics

Productivity enabling you to move more and make more.

Operator Station

Best-in-class operator comfort and ergonomics.

Technology Solutions

Greater productivity through Integrated Electronic Systems.

Cat MineStar System

Work more productively.

Safety

Making your safety our priority.

Serviceability

Enabling high uptime by reducing your service time.

Customer Support

Your Cat dealers know how to keep your mining machines productive.

Sustainability

Making sustainable progress possible.

Cat Blades

Dependable dozing with blades designed for your application.
Standard Equipment
  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • OPERATOR ENVIRONMENT
    • Air conditioner and heater with automatic temperature control
    • Cab, sound-suppressed pressurized, protective structure (ROPS/FOPS), radio ready for (entertainment) includes antenna, speakers and converter (12V, 10-15 amp)
    • 12V power port for mobile phone or laptop connection
    • Camera, rear vision
    • Cigar lighter and ashtray
    • Coat hook
    • Electro-hydraulic blade controls (seat mounted)
    • Flip-up armrest
    • Heater and defroster
    • Horn, electric
    • Implement hydraulic lockout
    • Instrumentation, gauges: - Engine coolant temperature - Fuel level - Ground speed - Gear - Hydraulic oil temperature - Speedometer/tachometer - Torque converter temperature
    • Instrumentation, warning indicators: - Action alert system, three category - Automatic transmission model enable status - Brake malfunction - Bucket float status - Delayed engine shutdown status - Engine idle shutdown status - Engine malfunction - Fuel economy mode enable status - Hydraulic lockout - Lockup clutch enable status - Low fuel level - Parking brake status - Rimpull control enable status - Seatbelt warning - Secondary steering (if equipped) - Throttle lock status - Transmission gear
    • Keypad, control with indicator lights: - Auto trans mode speed range - Auto/manual transmission mode - Lockup clutch - Reduced rimpull - Throttle lock
    • Light, dome (cab)
    • Lunchbox and beverage holders
    • Mirrors, rearview (externally mounted)
    • Seat, Cat comfort (cloth) air suspension
    • Seat belt, retractable, 76 mm (3 in) wide
    • STIC control system with steering lock
    • Tinted glass
    • Trainer seat with lap belt
    • Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
    • Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
  • POWER TRAIN
    • Brakes, full hydraulic, enclosed, oil-disc
    • Axle-shaft oil-disc service brake
    • Electro hydraulic parking brake
    • Case drain filters
    • Cat clean emission module (Tier 4 only)
    • Demand fan
    • Engine Cat C27
    • Fuel priming pump (electric)
    • Ground level engine shutoff, bumper
    • Mufflers (under hood) (Tier 2 only)
    • Precleaner, engine air intake
    • Radiator, Aluminum Modular (AMR)
    • Separated cooling system
    • Starting aid, (ether) manual override
    • Throttle Lock
    • Torque Converter, Impeller Clutch with lock-up clutch feature and rimpull control system
    • Transmission, 534 mm (21 in) planetary power shift (electronic) (3F/3R)
  • ELECTRICAL
    • Alarm, back-up
    • Alternator, 150 amp
    • Batteries, maintenance free (2 - 1,400 CCA)
    • Converter, 10/15 amp, 24V to 12V
    • Deutsch component connectors
    • Electrical system, 24V
    • Electronic transmission control
    • Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
    • Starter, electric
    • Starter lockout in bumper
    • Starting receptacle for emergency start
    • Transmission lockout in bumper
  • OTHER
    • Axle temperature sensor
    • Battery disconnect and jump start receptacle, bumper
    • Coupling, Caterpillar O-ring face seals
    • Economy mode with on demand throttle
    • Emergency platform egress
    • Engine, crankcase, 500 hour interval with CH4
    • Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
    • Fenders, steel (front)
    • Guards, crankcase and power train
    • Grouped/labeled lube points
    • Hitch, drawbar with pin
    • Hoses, Cat XT
    • Oil sampling valves
    • Positive flow control hydraulic system
    • Product Link™
    • Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
    • Stairway, left and right rear access
    • Steering, load sensing
    • Steering, secondary
    • Toe kicks
    • Vandalism protection caplocks
    • Venturi stack
    • Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)
Optional Equipment
  • NOTE
    • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • POWER TRAIN
    • 50° C (-58° F) antifreeze
    • Engine oil change system, high speed, Wiggins
    • Engine block heater 120V or 240V
    • High ambient cooling - software
  • BLADES
    • Semi-U - 17.8 m3 (23.3 yd3)
    • HD Semi-U - 16.1 m3 (21.1 yd3)
    • Coal - 30.7 m3 (40.2 yd3)
  • OPERATOR ENVIRONMENT
    • Cab precleaner
    • AM/FM/CD/MP3 radio
    • Satellite Sirius radio with Bluetooth
    • LED warning strobe
    • CB radio ready
    • Window sun shade
  • MISCELLANEOUS ATTACHMENTS
    • Front and rear roading fenders
    • Fast fill fuel system (Shaw-Aero)
    • Axle oscillation stop
    • Paint, black blade rear