336 Excavator

  • Specs Summary
  • Engine Model
    ( )
  • Engine Model
  • Gross Power
    752 HP (561 kW)
  • Net Power - ISO 9249

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.
  • Operating Weight 165089 lb (74883 kg)
  • Centerline of Rear Axle to Edge of Bumper 12.5 ft (3795 mm)
  • Rear ( )
  • Steering System - Circuit ( )
  • Steering System - Pump ( )
  • Centerline of Front Axle to Hitch 7.5 ft (2300 mm)
  • Engine Model ( )
  • Height - Top of Hood 12.7 ft (3862 mm)
  • Transmission 29.1 gal (US) (110 l)
  • Ground Clearance 2 ft (596 mm)
  • Differential - Final Drives - Rear 68.9 gal (US) (261 l)
  • Crankcase 20 gal (US) (76 l)
  • Direct Drive - Forward 1 ( )
  • Cooling System 54.9 gal (US) (208 l)
  • Differential - Final Drives - Front 71.6 gal (US) (271 l)
  • Direct Drive - Reverse 2 9.6 mile/h (15.4 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)
  • Bore 5.4 in (137.2 mm)
  • Wheel Base 15.1 ft (4600 mm)
  • Front ( )
  • Emissions ( )
  • Maximum Flow 94.3 gal/min (357 l/min)
  • Total Steering Angle 35 ° (35 °)
  • Net Power - SAE J1349 - Standard Ambient 699 HP (521 kW)
  • Net Power - SAE J1349 699 HP (521 kW)
  • Gross Power - ISO 14396 752 HP (561 kW)
  • Net Power - SAE J1349 - High Ambient 648 HP (483 kW)
  • Peak Torque - Speed 2624 lb/ft (3557 N·m)
  • Gross Power - SAE J1995 766 HP (571 kW)
  • Machine Sound Level (ISO 6395:2008) 115 dB(A) (115 dB(A))
  • Hydraulic System - Implement and Hydraulic Fan 68.9 gal (US) (261 l)
  • Hydraulic System - Steering and Braking 34.9 gal (US) (132 l)
  • Converter Drive - Reverse 1 4.9 mile/h (7.9 km/h)
  • Rated Speed 1800 r/min (1800 r/min)
  • Converter Drive - Forward 1 4.5 mile/h (7.3 km/h)
  • Converter Drive - Reverse 3 15.5 mile/h (24.9 km/h)
  • Cab - ROPS/FOPS (2) ( )
  • Cab - ROPS/FOPS (1) ( )
  • Converter Drive - Reverse 2 9.1 mile/h (14.7 km/h)
  • Direct Drive - Reverse 1 5.4 mile/h (8.7 km/h)
  • Torque Rise 18 % (18 %)
  • Brakes ( )
  • Height - Top of ROPS 17.2 ft (5240 mm)
  • FOPS ( )
  • Converter Drive - Forward 3 14.2 mile/h (22.9 km/h)
  • Oscillation Angle 8.5 ° (8.5 °)
  • Blade Capacity Range ( )
  • Machine Sound Level (ISO 6395:2008) 113 dB(A) (113 dB(A))
  • Operator Sound Level (ISO 6396:2008) 69 dB(A) (69 dB(A))
  • Relief Valve Setting - Tilt Cylinders (Small Pump) 2920 psi (20150 kPa)
  • 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)
  • Minimum Turning Radius - Over Blade 34 ft (10369 mm)
  • Relief Valve Setting 4500 psi (31000 kPa)
  • Operator Sound Level (ISO 6396:2008) 69 dB(A) (69 dB(A))
  • Air Conditioning ( )
  • ROPS ( )
  • Converter Drive - Forward 2 8.3 mile/h (13.3 km/h)
  • Cylinder, Double Acting - Tilt and Tip, Bore and Stroke ( )
  • Length - With Blade on Ground 36.5 ft (11120 mm)
  • Fuel Tank - Standard 286.6 gal (US) (1085 l)
  • Height - Top of Exhaust Pipe 16.6 ft (5049 mm)
  • Gross Power 752 HP (561 kW)
  • Displacement 1649.5 in³ (27.03 l)
  • Stroke 6 in (152.4 mm)
  • Transmission Type ( )
  • Cylinders, Double Acting - Lift, Bore and Stroke ( )
  • Direct Drive - Reverse 3 16.4 mile/h (26.4 km/h)

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