844 Wheel Dozer - Thompson Machinery

Exterior View
Interior View

Request a Quote

Engine

Engine Model: C27 Cat®
Rated Speed: 1,800 r/min
Gross Power - ISO 14396: 752 HP
Gross Power - SAE J1995: 766 HP
Net Power - SAE J1349 - Standard Ambient: 699 HP
Net Power - SAE J1349 - High Ambient: 648 HP
Bore: 5 in
Stroke: 6 in
Displacement: 1,650 in³
Peak Torque - Speed: 2,624 lb/ft
Torque Rise: 18 %
Emissions: U.S. EPA Tier 4 Final and EU Stage V or China Nonroad Stage III Emissions standards, equivalent to U.S. EPA Tier 2

Operating Specifications

Operating Weight: 165,089 lb
Blade Capacities: 15.9 - 30.7 m3 (20.7 - 40.2 yd3)

Transmission

Direct Drive - Forward 1: Lock-up disabled
Transmission Type: Cat Planetary Power Shift
Converter Drive - Forward 1: 5 mile/h
Converter Drive - Forward 2: 8 mile/h
Converter Drive - Forward 3: 14 mile/h
Converter Drive - Reverse 1: 5 mile/h
Converter Drive - Reverse 2: 9 mile/h
Converter Drive - Reverse 3: 16 mile/h
Direct Drive - Forward 2: 9 mile/h
Direct Drive - Forward 3: 15 mile/h
Direct Drive - Reverse 1: 5 mile/h
Direct Drive - Reverse 2: 10 mile/h
Direct Drive - Reverse 3: 16 mile/h

Hydraulic System - Lift/Tilt

Output at 2,000 rpm and 6900 kPa (1,000 psi): 82 gal/min
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)
Relief Valve Setting - Bulldozer (Large Pump): 2,700 psi
Relief Valve Setting - Tilt Cylinders (Small Pump): 2,920 psi

Hydraulic System - Steering

Steering System - Circuit: Pilot, load sensing
Steering System - Pump: Piston, variable displacement
Minimum Turning Radius - Over Blade: 34 ft
Total Steering Angle: 35 °
Maximum Flow: 94 gal/min
Relief Valve Setting: 4,500 psi

Service Refill Capacities

Fuel Tank - Standard: 287 gal (US)
Cooling System: 55 gal (US)
Crankcase: 20 gal (US)
Transmission: 29 gal (US)
Differential - Final Drives - Front: 72 gal (US)
Differential - Final Drives - Rear: 69 gal (US)
Hydraulic System - Implement and Hydraulic Fan: 69 gal (US)
Hydraulic System - Steering and Braking: 35 gal (US)

Air Conditioning System

Air Conditioning: The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.

Axles

Front: Fixed
Rear: Trunnion
Oscillation Angle: 9 °

Brakes

Brakes: Meets ISO 3540:2011

Sound Performance - Standard

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

Sound Performance - Suppression

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

Cab

ROPS/FOPS: ISO 3471:2008 and ISO 3449:2005 Level II Standards

Dimensions (Approximate)

Height - Top of ROPS: 17 ft
Height - Top of Exhaust Pipe: 17 ft
Height - Top of Hood: 13 ft
Ground Clearance: 2 ft
Centerline of Front Axle to Hitch: 8 ft
Centerline of Rear Axle to Edge of Bumper: 13 ft
Wheel Base: 15 ft
Length - With Blade on Ground: 37 ft

Long Term Value and Durability

Move More with Less Fuel

Safety First

Technology that Gets Work Done

Work In Comfort

Reduce Environmental Impact

Save on Service and Maintenance

Purpose-Built Cat Attachments

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
- Cigar lighter and ashtray
- Coat hook
- Electro-hydraulic blade controls (joystick)
- Flip-up armrest
- Heater and defroster
- Horn, electric
- 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, premium with heated and actively cooled leather, adjustable lumbar support, air adjustable bolsters on the seat and backrest, seat cushion tilt adjustment, and adjustable-length seat cushion
- STIC control system with steering lock
- Tinted glass
- Wet-arm wipers/washers (front, rear and corner) intermittent front wiper
- Converter (12V, 10/15 amp) and power port
Power Train
- Brakes, oil cooled, multi-disc, service/secondary
- Axle-shaft oil-disc service brake
- Electro hydraulic parking brake
- Cat clean emission module (Tier 4 only)
- Demand fan
- Engine Cat C27
- Fuel priming pump (electric)
- Ground level engine shutoff
- Mufflers (under hood) (Tier 2 only)
- Precleaner, engine air intake
- Radiator, Aluminum Modular (AMR)
- Separated cooling system
- Starting aid, (ether) automatic
- Throttle Lock electronic
- 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
- Alternator, 150 amp
- Batteries, maintenance free (4 - 1,400 CCA)
- Deutsch terminal connectors
- Electrical system, 24V
- Electronic transmission control
- Lighting system, halogen (front and rear) lighting, access stairway, engine compartment
- Starting and charging system, 24V
- Starter lockout in bumper
- Starting receptacle for emergency start
- Transmission lockout in bumper
Service
- Vital Information Management System (VIMS) 3G with graphical information display: external data port, customizable operator profiles
- Case drain filters
- Coupling, Caterpillar O-ring face seals
- Guards, crankcase and power train
- Hitch, drawbar with pin
- Hoses, Cat XT
- Oil sampling valves
- Product Link^™
Safety
- Camera, rear vision
- Implement lockout switch
- Seat belt, retractable, 76 mm (3 in) wide
- Trainer seat with lap belt
- Alarm, back-up
- Emergency platform egress
- Stairway, left and right rear access
- Steering, secondary
- Toe kicks
Tramming
- Fenders, steel (front)
Other
- Axle temperature sensor
- Battery disconnect and jump start receptacle, bumper
- Economy mode with on demand throttle
- Engine, crankcase, 500 hour interval with CH4
- Engine idle management features: - Auto idle kickdown - Delayed engine shutdown - Engine idle shutdown
- Grouped/labeled lube points
- Positive flow control hydraulic system
- Sight Gauges: hydraulic tanks, steering/fan and implement/brake, and transmission
- Steering, load sensing
- Vandalism protection caplocks
- Premixed 50% concentration of extended life coolant with freeze protection to -34° C (-29° F)

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/MP3 radio
- Satellite Sirius radio with Bluetooth
- LED warning strobe
- CB radio ready
- Window sun shade
Tramming
- Front and rear roading fenders
Miscellaneous Attachments
- Fast fill fuel system (Shaw-Aero)
- Axle oscillation stop
- Paint, black blade rear
Other
- Venturi stack