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Engine ModelCat® C18
Rated Speed1900 r/min (1900 r/min)
Peak Power Speed1500 r/min (1500 r/min)
Gross Power - SAE J1995562 HP (419 kW)
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 support your job site efficiently and safely while lowering owning and operating costs. Introduced in the mid-1960's, the 834 has been the industry leader for over 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 834 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.


Engine ModelCat® C18
Rated Speed1900 r/min (1900 r/min)
Peak Power Speed1500 r/min (1500 r/min)
Gross Power - SAE J1995562 HP (419 kW)
Net Power - SAE J1349496 HP (370 kW)
Bore5.7 in (145 mm)
Stroke7.2 in (183 mm)
Displacement1105 in³ (18.1 l)
Peak Torque - 1,300 rpm2092 lb/ft (2836 N·m)
Torque Rise52 % (52 %)
EmissionsU.S. EPA Tier 4 Final and EU Stage V emission standards or equivalent to U.S. EPA Tier 3 and U.S. EPA Tier 2.
Operating Weight105271 lb (47750 kg)
Blade Capacities7.9 – 22.2 m3 (10.3 – 29.0 yd3)
Coal Scoop Operating Weight112428 lb (51103 kg)
Transmission TypeCat planetary power shift
Chip Scoop Operating Weight112838 lb (112838 kg)
Forward - 14.2 mile/h (6.8 km/h)
Forward - 27.2 mile/h (11.6 km/h)
Forward - 312.6 mile/h (20.3 km/h)
Forward - 422 mile/h (35.4 km/h)
Reverse - 14.2 mile/h (6.8 km/h)
Reverse - 27.6 mile/h (12.2 km/h)
Reverse - 313.3 mile/h (21.4 km/h)
Direct Drive - Forward 1Lock-up disabled
Direct Drive - Forward 27.7 mile/h (12.4 km/h)
Direct Drive - Forward 313.7 mile/h (22.1 km/h)
Direct Drive - Forward 423.9 mile/h (38.5 km/h)
Direct Drive - Reverse 14.5 mile/h (7.2 km/h)
Direct Drive - Reverse 28.1 mile/h (13 km/h)
Direct Drive - Reverse 314.3 mile/h (23 km/h)
Lift/Tilt System - CircuitPilot operated LS valve with EH
Lift/Tilt SystemVariable displacement piston
Maximum Flow at 1,900 rpm153 gal/min (582 l/min)
Relief Valve Setting - Lift/Tilt4641 psi (32000 kPa)
Cylinders, Double Acting - Lift, Bore and Stroke139.75 mm × 1021 mm (5.5 in × 40.2 in)
Cylinders, Double Acting - Left and Right Tilt, Bore and Stroke140 mm × 230 mm (5.5 in × 9.1 in)
Pilot SystemVariable displacement piston
Pilot Maximum Flow13.7 gal/min (52 l/min)
Pilot Relief Valve Setting580 psi (4000 kPa)
Steering System - CircuitPilot, load sensing
Steering System - PumpPiston, variable displacement
Maximum Flow65.8 gal/min (250 l/min)
Relief Valve Setting - Steering3495 psi (24100 kPa)
Total Steering Angle86 ° (86 °)
Steering Cycle Times - High Idle3.1 s (3.1 s)
Steering Cycle Times - Low Idle5.7 s (5.7 s)
Fuel Tank209.5 gal (US) (793 l)
Cooling System31.7 gal (US) (120 l)
Crankcase15.9 gal (US) (60 l)
Diesel Exhaust Fluid Tank8.7 gal (US) (33 l)
Transmission31.7 gal (US) (120 l)
Hydraulic System Factory Fill63.4 gal (US) (240 l)
Differential - Final Drives - Front49.1 gal (US) (186 l)
Differential - Final Drives - Rear49.1 gal (US) (186 l)
Hydraulic System - Tank Only37 gal (US) (140 l)
Air ConditioningThe 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.
Oscillation Angle±13°
BrakesISO 3450: 2011
Operator Sound Level (ISO 6396)72 dB(A) (72 dB(A))
Machine Sound Level (ISO 6395)113 dB(A) (113 dB(A))
Operator Sound Level (ISO 6396)72 dB(A) (72 dB(A))
Machine Sound Level (ISO 6395)109 dB(A) (109 dB(A))
Height - Top of Exhaust Stack15.9 ft (4835 mm)
Height - Top of Air Cleaner12.8 ft (3895 mm)
Height - Top of Hood10.9 ft (3334 mm)
Ground Clearance - Bumper3.1 ft (933 mm)
Centerline of Rear Axle to Edge of Bumper10.5 ft (3187 mm)
Wheel Base14.9 ft (4550 mm)
Length - Front of Tire28.4 ft (8715 mm)
Length - Straight Blade on Ground32.6 ft (9927 mm)
Centerline of Front Axle to Hitch7.5 ft (2275 mm)
Length - Universal Blade on Ground34.4 ft (10470 mm)
Ground Clearance1.7 ft (531 mm)
Height - Top of Cab13.7 ft (4184 mm)
Chip Scoop Carry Capacity35 yd³ (26.8 m³)
Chip Scoop Doze Capacity70 yd³ (53.3 m³)
Coal Scoop Carry Capacity30 yd³ (22.9 m³)
Coal Scoop Doze Capacity60 yd³ (45.9 m³)

Benefits and Features

Unmatched Durability

  • The full box-section rear frame resists torsional shock and twisting forces.
  • Heavy-duty steering cylinder mounts efficiently transmit steering loads into the frame.
  • Optimized axle mounting results in increased structural integrity.
  • Achieve longer component life with increased size of upper hitch pin, frame plate, and bearing.
  • Solid through-width push beams transfer and absorb stresses through a larger portion of the frame.
  • Features fully enclosed hydraulic wet disc brakes for improved performance.
  • Robust structures withstand the toughest conditions and multiple lifecycles to improve your bottom line.
  • In corner dozing, stresses are transferred and absorbed through a larger portion of the frame.

Optimum Efficiency

  • The Cat C18 engine is designed for maximum fuel efficiency in the most demanding applications.
  • Experience reliable efficiency with complete control over injection timing, duration, and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
  • Best-in-class Cat planetary powershift transmission features consistent, smooth shifting and efficiency through integrated electronic controls.
  • Extended engine life and improved fuel efficiency with reduced rated speed.
  • Impeller Clutch Torque Converter (ICTC) and Rimpull Control System (RCS) provide precise rimpull control.
  • Load sensing hydraulic steering system enables precise machine control for easier loading.
  • Lock-up torque converter with advanced control of lock-up speed.
  • On demand cooling fan protects investment and lengthens lifecycle.
  • Fully integrated electronic engine controls provide quick response.

Increased Safety

  • Optional Cat Detect with Object Detection System (rearview camera and radar) or standard Vision (rearview camera) increase operator awareness around the machine.
  • Cab-mounted LED strobes provide warning for others near the machine.
  • Optional HID or LED lights provide excellent workspace visibility.
  • Optional heated mirrors ensure enhanced visibility for safe operation.

Innovative Technology

  • Integrated technologies allow you to monitor, manage, and enhance your jobsite operations.
  • Product Link™ remote monitoring provides valuable insight into machine or fleet performance through the VisionLink® interface, so you can make decisions that boost jobsite efficiency and lower operating costs.
  • Vital Information Management System (VIMS™) 3G touchscreen monitor gives access to a wide range of sensor information and enhanced machine data to resolve problems before machine failure.
  • Optional Cat Detect technologies enhance awareness of the environment around the machine for increased safety.

Enhanced Operator Comfort

  • Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steering into a single lever, maximizing responsiveness and control, while reducing operator fatigue.
  • Operators can easily enter and exit the cab with fold-up STIC steer/ armrest, reduced access stairway angles, and standard stairway lighting.
  • Experience reduced vibrations with isolated cab mounts and seatmounted implement and steering controls.
  • Reduced interior sound levels keep operators comfortable throughout their entire shift.

Improved Sustainability

  • The engine is available in configurations that meet U.S. EPA Tier 4 Final and EU Stage V emission standards, or equivalent to U.S. EPA Tier 3 or U.S. EPA Tier 2.
  • Automatic Engine Idle Shutdown conserves fuel when machine is not in use.
  • Generate less waste with maintenance-free batteries.
  • Maximize machine life and lower operating costs with Caterpillar Reman and Certified Rebuild programs, which utilize reused or remanufactured components for 40 to 70% cost savings.
  • Retrofit packages from Caterpillar deliver new features to older machines to get the most from your investment.

Simplified Maintenance

  • Machine features ground level or platform access to easily reach daily service points.
  • Swing-out doors on either side of the engine compartment provide easy access to critical daily service checks.
  • Ecology drains prevent spills and allow for easier service.
  • Intuitive design includes ground level access to transmission control valves for safe and convenient service.

  • Available in two scoop arrangements – wood chip and coal.
  • Cat wood chip and coal scoops have the unique capability of maximizing your production by both dozing and carrying a load with each pass.
  • A purpose built hydraulic system, optimized for use with this work tool, maximizes machine productivity and efficiency.
  • Dual lift cylinders provide hydraulic lift capacity matched to the demands of the application.
  • Can be equipped with optional ground level accessible swing-out reversing fan for quick inspection and easy cleanout.
  • Equipped with underhood ventilation system which creates a neutral pressure environment to prevent wood chip ingestion from hood openings while providing fresh air to the alternator, electronics, and turbo.
  • Extended top guard for increased capacity for wood chip scoops.
  • Higher ground pressure decreases risk of fires and maximizes use of storage space.
  • Less damage to coal or wood chips due to rubber tires.
  • High ground speed provides ability to manage multiple piles.
  • Scoop design allows load and carry function for mixing.
  • Lift and tip-out design makes stockpiling operations easy.
  • Scoop tilt control is standard to maximize worksite efficiency.

Standard Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • Alarm, back-up
  • Alternator (100 amp)
  • Batteries, dry
  • Hazardous voltage lamp
  • Converter, 10/15 amp, 24V to 12V
  • Lighting system, (LED work lights, access and service platform lighting)
  • Starting and charging system, 24V
  • Starter emergency start receptacle
  • Air conditioner
  • Cab, sound suppressed and pressurized
  • Cab, sound suppressed and pressurized, integrated rollover protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
  • Cat Vision, rear-vision camera system
  • Graphical information display, displays real time operating information, performs calibrations and customizes operator settings
  • Tilt, tip controls
  • Heater and defroster
  • Horn, electric
  • Light, cab (dome)
  • Lights, directional
  • Lunchbox and beverage holders
  • Monitoring system (VIMS 3G)
  • Radio, AM/FM/CD/MP3 Bluetooth®
  • Instrumentation, gauges: - coolant temperature, engine hour meter, hydraulic oil temperature, powertrain oil temperature
  • Mirrors, rearview (externally mounted)
  • Rimpull control system (RCS)
  • Seat, deluxe
  • Seat belt, retractable, 76 mm (3 in) wide
  • Steering and transmission integrated control (STIC™) system
  • UV glass
  • Operator presence
  • Wet-arm wipers/washers (front and rear)
  • Intermittent front and rear wipers
  • Brakes, oil-cooled, multi-disc, service/secondary
  • Automatic retarding controls
  • Case drain screens
  • Engine, Cat C18 MEUI™, diesel, turbocharged/aftercooled
  • Antifreeze, premixed 50% concentration of extended life coolant with freeze protection to -34°C (-29°F)
  • Parking brake
  • Turbine precleaner, engine air intake
  • Radiator, Aluminum Modular Radiator (AMR)
  • Manual switch and automatic fuel priming
  • Starting aid (ether) automatic
  • Throttle lock, electronic
  • Torque converter, impeller clutch with lock-up control system and rimpull control system (switch and dial in cab)
  • Transmission, planetary, power shift (4F/3R) electronic control
  • Doors, service access (locking)
  • Hitch, drawbar with pin
  • Oil sampling valves
  • Stairway, left side (rear access)
  • Steering, load sensing
  • Vandalism protection caplocks

Optional Equipment

  • Standard and optional equipment may vary. Consult your Cat dealer for details.
  • -50° C (-58° F) antifreeze
  • Engine oil change system, high speed, Wiggins
  • Engine brake
  • High ambient cooling-software
  • Turbine precleaner, engine air intake dual stage
  • Axle oil cooler
  • Crankcase guards
  • Cab precleaner
  • Radio, AM/FM/CD/MP3 Bluetooth with Satellite SiriusXM
  • Satellite Sirius radio with Bluetooth
  • LED warning strobe
  • CB radio ready
  • Window pull down visor
  • Cat Detect (object detection system)
  • Front and rear roading fenders
  • Fast fill fuel system (Shaw-Aero)