844K Wheel Dozer

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844K Wheel Dozer

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.
  • Standard Equipment
  • Optional Equipment
  • Specs

Standard Equipment

  • 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 ACERT
    • 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

  • 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

Specs

Overview

Long Name:
844K Wheel Dozer
Name:
844K
Brand:
Caterpillar
Status:
Noncurrent

Engine

Engine Model:
Cat® C27 ACERT™
Gross Power:
752 HP / 561 kW
Bore:
5.4 in / 137.2 mm
Stroke:
6 in / 152.4 mm
Displacement:
1649.5 in³ / 27.03 l
Torque Rise:
18 % / 18 %
Emissions:
U.S. EPA Tier 4 Final or Tier 2 Equivalent
Gross Power - ISO 14396:
752 HP / 561 kW
Gross Power - SAE J1995:
766 HP / 571 kW
Net Power - SAE J1349:
699 HP / 521 kW
Net Power - SAE J1349 - High Ambient:
648 HP / 483 kW
Net Power - SAE J1349 - Standard Ambient:
699 HP / 521 kW
Peak Torque - Speed:
2624 lb/ft / 3557 N·m
Rated Speed:
1800 r/min / 1800 r/min

Weights

Operating Weight:
165089 lb / 74883 kg

Transmission

Converter Drive - Forward 1:
4.5 mile/h / 7.3 km/h
Converter Drive - Forward 2:
8.3 mile/h / 13.3 km/h
Converter Drive - Forward 3:
14.2 mile/h / 22.9 km/h
Converter Drive - Reverse 1:
4.9 mile/h / 7.9 km/h
Converter Drive - Reverse 2:
9.1 mile/h / 14.7 km/h
Converter Drive - Reverse 3:
15.5 mile/h / 24.9 km/h
Direct Drive - Forward 2:
8.5 mile/h / 13.7 km/h
Direct Drive - Forward 3:
15.2 mile/h / 24.5 km/h
Direct Drive - Reverse 1:
5.4 mile/h / 8.7 km/h
Direct Drive - Reverse 2:
9.6 mile/h / 15.4 km/h
Direct Drive - Reverse 3:
16.4 mile/h / 26.4 km/h
Direct Drive - Forward 1:
Lock-up disabled
Transmission Type:
Cat Planetary Power Shift

Service Refill Capacities

Fuel Tank - Standard:
286.6 gal (US) / 1085 l
Cooling System:
54.9 gal (US) / 208 l
Crankcase:
20 gal (US) / 76 l
Transmission:
29.1 gal (US) / 110 l
Differential - Final Drives - Front:
71.6 gal (US) / 271 l
Differential - Final Drives - Rear:
68.9 gal (US) / 261 l
Hydraulic System - Implement and Hydraulic Fan:
68.9 gal (US) / 261 l
Hydraulic System - Steering and Braking:
34.9 gal (US) / 132 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.

Brakes

Brakes:
Meets ISO 3540:2011

Axles

Front:
Fixed
Rear:
Trunnion
Oscillation Angle:
8.5 ° / 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) / 115 dB(A)
Operator Sound Level (ISO 6396:2008):
69 dB(A) / 69 dB(A)

Sound Performance - Suppression

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

Hydraulic System - Lift/Tilt

Cylinder, Double Acting - Tilt and Tip, Bore and Stroke:
210 mm × 188 mm (8.25 in × 7.4 in)
Cylinders, Double Acting - Lift, Bore and Stroke:
133 mm × 1535 mm (5.25 in × 60.4 in)
Output at 2,000 rpm and 6900 kPa (1,000 psi):
82 gal/min / 311 l/min
Relief Valve Setting - Bulldozer (Large Pump):
2700 psi / 18650 kPa
Relief Valve Setting - Tilt Cylinders (Small Pump):
2920 psi / 20150 kPa

Hydraulic System - Steering

Maximum Flow:
94.3 gal/min / 357 l/min
Minimum Turning Radius - Over Blade:
34 ft / 10369 mm
Relief Valve Setting:
4500 psi / 31000 kPa
Steering System - Circuit:
Pilot, load sensing
Steering System - Pump:
Piston, variable displacement
Total Steering Angle:
35 ° / 35 °

Dimensions (Approximate)

Centerline of Front Axle to Hitch:
7.5 ft / 2300 mm
Centerline of Rear Axle to Edge of Bumper:
12.5 ft / 3795 mm
Ground Clearance:
2 ft / 596 mm
Height - Top of Exhaust Pipe:
16.6 ft / 5049 mm
Height - Top of Hood:
12.7 ft / 3862 mm
Height - Top of ROPS:
17.2 ft / 5240 mm
Length - With Blade on Ground:
36.5 ft / 11120 mm
Wheel Base:
15.1 ft / 4600 mm