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Medium Wheel Dozers (Non Current)

Every operation is looking for high production support machines. Cat wheel dozers combine the production capabilities of track-type tractors with the mobility and versatility of wheel loaders to give you an outstanding utility machine.

834G Wheel Dozer

Engineered for demanding work in large dozing applications. The 834G Wheel Dozer combines increased power, mobility and operator comfort to provide a revolutionary advancement in the large wheel dozer design. The 834G is ideally suited for the rigorous earth moving duties of the mining and contracting industries.

  • Specification Summary

  • Engine ModelCat 3456 Diesel
  • Flywheel Power359.0 kW
  • Gross Power392.0 kW
  • Direct Drive Net Power – Caterpillar336.0 kW
  • Direct Drive Net Power – EEC 80/1269336.0 kW

Product Details


Engine Model Cat 3456 Diesel
Flywheel Power 359.0 kW
Gross Power 392.0 kW
Direct Drive Net Power – Caterpillar 336.0 kW
Direct Drive Net Power – EEC 80/1269 336.0 kW
Direct Drive Net Power – ISO 9249 336.0 kW
Direct Drive Net Power – SAE J1349 (JAN90) 333.0 kW
Converter Drive Net Power – Caterpillar 359.0 kW
Converter Drive Net Power – EEC 80/1269 359.0 kW
Converter Drive Net Power – ISO 9249 359.0 kW
Converter Drive Net Power – SAE J1349 (JAN90) 355.0 kW
Bore 140.0 mm
Stroke 171.0 mm
Displacement 15.8 L


Operating Weight 47106.0 kg

Blade Specifications

Blade Capacities 7.9 to 22.2 m3 10.3 to 29 yd3
Straight Blade - Capacity 7.9 m3
Moldboard Length 5700.0 mm
Straight Blade - Overall Width 5074.0 mm
Straight Blade - Height 1461.0 mm
Straight Blade - Digging Depth 557.0 mm
Maximum Lift Above Ground 1279.0 mm
Straight Blade - Ground Clearance 1279.0 mm
Straight Blade - Maximum Tilt 1270.0 mm
Straight Blade - Weight 3196.0 kg
Straight Blade - Total Operating Weight 47106.0 kg
Universal Blade - Capacity 11.13 m3
Universal Blade - Overall Width 5151.0 mm
Universal Blade - Height 1461.0 mm
Universal Blade - Digging Depth 557.0 mm
Universal Blade - Ground Clearance 1279.0 mm
Universal Blade - Maximum Tilt 1270.0 mm
Universal Blade - Weight 4554.0 kg
Universal Blade - Total Operating Weight 48464.0 kg
Coal Blade - Capacity 22.2 m3
Coal Blade - Overall Width 5677.0 mm
Coal Blade - Height 1956.0 mm
Coal Blade - Digging Depth 465.0 mm
Coal Blade - Ground Clearance 1178.0 mm
Coal Blade - Maximum Tilt 1482.0 mm
Coal Blade - Weight 4290.0 kg
Coal Blade - Total Operating Weight 48195.0 kg

Operating Specifications

Ground Clearance 541.0 mm


Number of Forward Speeds 4
Number of Reverse Speeds 3
Converter Drive – Forward 1 6.7 km/h
Converter Drive – Forward 2 11.8 km/h
Converter Drive – Forward 3 20.6 km/h
Converter Drive – Forward 4 35.8 km/h
Converter Drive – Reverse 1 7.0 km/h
Converter Drive – Reverse 2 12.3 km/h
Converter Drive – Reverse 3 21.6 km/h
Direct Drive – Forward 1 Lock-up Disabled in Forward 1
Direct Drive – Forward 2 12.3 km/h
Direct Drive – Forward 3 21.9 km/h
Direct Drive – Forward 4 38.7 km/h
Direct Drive – Reverse 1 7.2 km/h
Direct Drive – Reverse 2 12.9 km/h
Direct Drive – Reverse 3 23.0 km/h
Forward 1 6.9 km/h
Forward 2 12.4 km/h
Forward 3 22.1 km/h
Forward 4 38.5 km/h
Reverse 1 7.2 km/h
Reverse 2 13.0 km/h
Reverse 3 23.0 km/h


Standard Tire Size 35/65-33
Tires Four choices with others on request.

Hydraulic System

Gear pump output at 1,900 rpm and 24 000 kPa (3,480 psi) 188.0 L/min
Lift cylinder, bore and stroke 139.75 mm x 1021 mm 5.5 in x 40.2 in
Steering cylinder, bore and stroke 114.3 mm x 740 mm 4.5 in x 29.1 in
Right tilt and tip, bore and stroke 152.4 mm x 276 mm 6 in x 10.9 in
Left tilt and tip, bore and stroke 139.75 x 276 mm 5.5 x 10.9 in
Relief valve setting 29000.0 kPa


Brakes Meet SAE/ISO 3450 1996.


Front Fixed axle
Rear Oscillating +/-13°
Maximum single-wheel rise and fall 448.3 mm


Steering Meets SAE J1511 FEB94/ISO 5010:1992 stds.
Turning radius with straight blade 8899.0 mm


Height to Top of Cab 4104.0 mm
Wheelbase 4550.0 mm
Length with Blade on Ground 9883.0 mm


Cab ROPS/FOPS is standard.
Sound Performance Levels Meets ANSI/SAE, SAE and ISO standards.
ROPS/FOPS Meets SAE and ISO standards.

Service Refill Capacities

Fuel Tank – standard 795.0 L
Cooling System 94.0 L
Crankcase 60.0 L
Transmission 72.0 L
Hydraulic Tank 140.0 L
Differentials and Final Drives – Front 186.0 L
Differentials and Final Drives – Rear 186.0 L

Power Train

The 834G power train components deliver dependable, reliable performance customers expect from Cat Wheel Dozers.

1 Caterpillar 3456 Diesel Engine

Is based on one of the most successful engines offered by Caterpillar, the 3406E. The 3456 is Tier 2 compliant and features increased horsepower and efficient fuel management for quick response, high productivity and exceptional service life. A new, sculptured cylinder block provides greater strength and is lighter weight.

• ADEM™ III (Advanced Diesel Engine Management III) System

Controls the fuel injector solenoids to start and stop fuel injection. This system provides automatic altitude compensation, air filter restriction indication and will not allow the engine to fire until it has oil pressure, acting as a cold start protection and a form of pre-lube.

• Air to Air Aftercooler (ATAAC) System

Provides a separate cooling system for the intake manifold air. The ATAAC system routes hot compressed air from the turbo and cools it with a single pass, air-to-air aluminum heat exchanger. The cooled, compressed air greatly reduces the emissions produced, meeting Tier 2 requirements.
  • Airflow matched turbocharger with power rating helps reduce emissions.
  • 19 percent more bearing area allows the engine to operate at the maximum cylinder pressure.
  • Higher cylinder pressure capability helps reduce fuel consumption and improves high altitude operation.
  • Cylinder head exhaust port sleeves reduce heat rejection which results in less heat transfer into the water jacket system.

2 Separate Engine Cooling System

Isolates the radiator and fan from the engine compartment for more efficient cooling and allows for a sloped hood for increased viewing.

Advanced Modular Cooling System (AMOCS)

Improves cooling capabilities by using a parallel flow system with 10 cores. Serviceability is improved with AMOCS as there is no top tank to remove.

3 Electronically Controlled Caterpillar Planetary Power Shift Transmission

Features preimeter-mounted, large diameter clutch packs that control inertia for smooth shifting and increased component life.

4 Impeller Clutch Torque Converter

Combined with the Rimpull Control System (RCS) allows the operator maximum flexibility in modulating rimpull.
  • The torque converter is equipped with a standard lock-up clutch for direct drive efficiency.
  • Improved calibration procedure
  • Improved left pedal modulation
  • Compensates for wear by providing the ability to recalibrate for optimum left pedal modulation regardless of torque converter wear
  • Uses the left brake pedal to modulate rimpull from 100 percent to 20 percent for reslippage. After 20 percent is achieved, further pedal travel applies the brake.
  • RCS allows the operator to select from four preset rimpull settings (low, medium, high and maximum).

5 Heavy-Duty Axles

Feature optional axle oil coolers, permanently lubed universal joints and stronger axle components in both the differentials and final drives for increased performance, serviceability and durability. Conventional differential is standard.

• Free-Floating Axle Shafts

Can be removed independent of the wheels and planetaries for quick and easy serviceability.

• Optional Axle Oil Cooling System

Features two circuits that circulate oil from the differentials through an oil-to-air cooler and a filter back to the brakes. This system provides increased oil life and improves component performance and durability. The system automatically turns on and off at a preset oil temperature.

6 Axle-Shaft, Oil Disk Brakes

Are adjustment-free, fully hydraulic and completely sealed. Disc face grooves provide cooling, even when brakes are applied, for a long, fade-resistant service life.
  • Location of the brakes improves serviceability. The axle-shaft brake design allows brake service while leaving the final drive intact.
  • Axle-shaft brakes require less force by operating on the low torque side of the axle. Combined with improved axle oil circulation for increased cooling, the oil-enclosed, multiple-disc brake design improves durability.
  • Parking brake is spring-applied, oil-released and dry disc. It is mounted on the transmission transfer gear output shaft. Manual override is possible to allow movement of the machine.

• Secondary Brakes

Are fully modulated and the front and rear service brake circuits are isolated so one circuit can operate if pressure drops in the other circuit.

• Service Brakes

Are four wheel, hydraulic, oil dipped multiple disc brakes that are adjustment-free, completely enclosed and allow modulated engagement without slack adjusters.

• Parking Brake

Is spring-applied, oil-released and dry disc. It is mounted on the transmission transfer gear output shaft. Manual override is possible to allow movement of the machine.


Well-balanced hydraulics deliver precise, low-effort control and trouble-free operation.

1 Electro-Hydraulic Control System

Increases hydraulic efficiency and enhances operator comfort through low-effort fingertip controls. XT-3 and XT-5 hose combine with reliable components to help reduce the risk of leaks and blowing lines.

2 Blade Control

A floor mounted single-lever, fingertip control for lift/lower/tilt/tip sends electronic signals to a main hydraulic valve positioned outside the cab. This eliminates sound, heat and control effort associated with in-cab hydraulic valve systems.

Tilt/Tip Circuit

Features fingertip control for ease of operation. Lift circuit features:
  • Four positions: raise, hold, lower and float
  • Detente hold on float

3 Load Sensing Steering

With the STIC control system, integrates steering and transmission into a single controller. The steering system utilizes a variable displacement pump for maximum machine performance by directing power through the steering system only when needed.

Electronic Monitoring System III (EMSIII)

Continually monitors various machine systems through three instrument clusters and provides a three-level warning system to alert the operator of immediate or pending problems. EMS III shares information with the engine, hydraulic and transmission controls that can be used during servicing to simplify service and troubleshooting. EMS III allows for new software to be uploaded in the cab.

Demand Fan

Is a speed controlled, hydraulic fan that provides maximum cooling efficiency by directing the appropriate amount of power through the fan system based on coolant temperature.

4 Case Drain Filtration

The 834G has two case drain filters that protect the steering and fan pumps from contamination with easy access for service.

Caterpillar Monitoring System (EMS-III)

Continually monitors various machine systems through three instrument clusters and provides a three-level warning system to alert the operator of immediate or pending problems. It shares information with the engine, hydraulic and transmission controls that can be used during servicing to simplify service and troubleshooting. The Caterpillar Monitoring System allows for new software to be uploaded in the cab.

Case Drain Filtration

The 834G has two case drain filters that protect the steering and fan pumps from contamination with easy access for service.


Advanced design and materials provide superior strength.

Structure Construction

Combine the use of robotic welding on up to 90 percent of the 834G while castings in several areas to increase strength by helping to spread the loads and reduce the number of parts. This provides highly consistent welds with deep plate penetration and excellent plate fusion. The benefit is increased durability and fatigue strength. The computer controlled machining ensures the alignments of pin bore, axle pad, cab mount and transmission/engine components.

1 Box-Section Engine End-Frame

Is designed to resist twisting and torsional forces and to provide a solid foundation for axles, engine and transmission.

2 Two-Plate Front Frame

Provides maximum structural strength during dozing applications for improved stability.

3 Spread-Hitch Design

Is large and improves load distribution by reducing loads to the hitch bearings. The large center hitch design improves hydraulic line routing and makes service access easier.

Upper and Lower Hitch Pins

Pivot on double-tapered roller bearings. Box-style sections in the hitch pins and cross member assembly improve strength of the frame structure.

Engine and Transmission Mounts

Use a rubber, mushroomed, cup-shaped design to reduce noise and vibration.

Frame Design

Straight side rail design improves torsional strength, shock load absorption and frame alignment. It is specifically designed with fewer parts to improve quality and reliability.

Operator Station

A new industry standard for comfort and efficiency.

World Class Cab

With over 3.18 m3 (112 ft3) of volume incorporates innovations for operator comfort, maneuverability and productivity. Features include outstanding viewing area, improved cab ventilation, interior sound levels below 77 dB(A), standard coat hook, cup holder, storage bin, intermittent wet-arm wipers, room for a large lunch cooler and radio-readiness.

1 STIC Control System

Combines gear selection and steering into one control lever that requires less effort and provides smooth shifting. Side-to-side motions for steering, finger operated direction control and thumb operated buttons for gear selection combine to provide a fluid motion that reduces effort and allows the operator to work the machine for long periods of time with little or no fatigue.

2 Left Pedal

Operates the Impeller Clutch Torque Converter. Within the first one and a half inches of pedal travel, rimpull can be controlled from 100 percent to 20 percent. Fully depressing the pedal applies the brake. The right pedal allows standard braking.

3 Comfort Series Seat

With air suspension and retractable seat belt is designed for increased comfort and support. Seat cushions reduce pressure on the lower back and thighs while allowing increased arm and leg movement.

4 Electro-Hydraulic Blade Controls

Are adjustable fore and aft, with a height-adjustable armrest so operators of any size can find a comfortable position. Single lever control allows operator to control blade functions: lift/lower, tip and tilt.

5 Tilt/Tip Switch

Allows operators to select tilt or tip control for dozing.

6 Electronic Monitoring System III (EMSIII)

Provides information on the machine's major components and systems.
  • Gauges display fuel tank level and temperatures for engine coolant, power train and hydraulic oil. The tachometer is an analog gauge with digital readout for gear selection and ground speed.
  • The main module consists of ten fault indicators and one display panel. Alerts occur for engine oil pressure, parking brake status, brake oil pressure, charging system, coolant flow status, hydraulic filter status, steering pressure, axle oil temperature, engine overspeed, machine hours, digital engine speed, odomoeter and faults.
  • Alerts the operator if transmission is engaged while parking brake is applied or if pressure drops, the brake is applied.

7 Throttle Lock

Allows the operator to pre-set the engine speed for a variety of applications, resulting in faster cycle times and increased productivity.

8 Rimpull Control System (RCS)

Has four factory preset rimpull settings (low, medium, high and maximum) that can be modified by the dealer for operator preference or to better match ground conditions.

9 Autoshift

Allows the operator to set the maximum gear into which the transmission will be allowed to shift. This feature allows additional comfort and focus on the job. The switch also offers a manual position for operator controlled shifting.

10 Lock-Up Clutch Torque Converter Switch

Activates lock-up clutch for direct drive efficiency.

11 Front and Rear Window Wiper/Washers

Are within easy reach to maintain a clear field of vision.

12 Viewing Area

Is improved with bonded front windshield that eliminate distracting metal frames for excellent bucket and work site visibility. An internal ROPS improves peripheral viewing by eliminating the large structure outside the cab.

13 Electro-Hydraulic Lock-Out Switch

Disables hydraulic controls.


Caterpillar blades are available to match many dozing requirements.

Caterpillar Blades

Are resilient and durable and designed with excellent dozing and rolling characteristics.
  • Capacities and widths are set to achieve increased productivity.
  • Special design allows for spreading of cover material as well as dozing of heavier loads.
  • High-strength, pressed rib construction.
  • Large, bolt-on cutting edges are DH-2 steel. End bits are DH-3 to provide maximum service life in tough materials.
  • Blades are fitted with Caterpillar standard hardware and Ground Engaging Tools (G.E.T.).
  • Cat blades are rebuildable for extended service life.

1 Straight Blade

Is designed for production dozing in stockpiled material and general earthmoving.

2 Universal Blade

Is designed for moving large loads over long distances in mining applications.

3 Coal Blade

Is designed for precise and productive dozing while helping to retain load control with increased capacity for lighter materials. Wing angles help retain the load while dozing.


For the straight blade and universal blade consist of the blade, push arms, hydraulic lift, tip and tilt cylinders, trunnion mounting and hydraulic line guards.


Simplified service means more production time.

Easy Maintenance

In addition to the servicing features built into the engine, the 834G includes:

Customer Support

Cat dealer services help keep machine operating longer with lower costs.

Machine Selection

Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventative maintenance cost and the true cost of lost production.


Look past initial price. Consider the financing options available as well as the day-to-day operating costs. Look at dealer services that can be included in the cost of the machine to yield lower equipment owning and operating costs over the long run.

Customer Support Agreements

Cat dealers offer a variety of product support agreements and work with you to develop a plan that best meets specific needs. These plans can cover the entire machine, including work tools, to help protect your investment.

Product Support

You will find nearly all parts at our dealer parts counter. Cat dealers use a world-wide computer network to find in-stock parts to minimize machine down time. Save money with genuine Cat Remanufcatured parts. You receive the same warranty and reliability as new products at cost savings of 40 to 70 percent.


Improving operating techniques can boost profits. Your Cat dealer has training videotapes, literature and other ideas to help increase productivity.

Maintenance Services

More and more equipment buyers are planning for effective maintenance before buying equipment. Choose from your dealer's wide range of maintenance services at the time you purchase your machine. Repair option programs guarantee the cost of repairs up front. Diagnostic programs such as S·O·SSM and Coolant Sampling and Technical Analysis help you avoid unscheduled repairs.


Repair, rebuild or replace? Your Cat dealers can help you evaluate the costs involved so you can make the right choice.
  • Electrical
    •  Alarm, back-up
    •  Alternator (100-amp)
    •  Batteries, maintenance-free
    •  Deutsch terminal connectors
    •  Diagnostic connector, starting and charging systems
    •  Electrical converter (12-volt)
    •  Electrical system (24-volt)
    •  Lighting system, halogen (front and rear)
    •  Starter, electric (heavy-duty)
    •  Starting receptacle for emergency start
  • Operator Environment
    •  Air conditioner
    •  Cigar lighter and ashtray
    •  Coat hook
    •  Heater and defroster
    •  Horn, electric
    •  Hydraulic controls (floor mounted)
    •  Light, dome (cab)
    •  Lunchbox and beverage holders
    •  Monitoring system (EMS III)
    •  Mirror, rearview (externally mounted)
    •  Seat, Cat Comfort (cloth) air suspension
    •  Seatbelt, retractable, 76 mm (3 in) wide
    •  STIC control system with steering lock
    •  Tinted glass
    •  Transmission gear (indicator)
    •  Wet-arm wipers/washers (front and rear)
  • Air conditioner
    • Cigar lighter and ashtray
      • Coat hook
        • Heater and defroster
          • Horn, electric
            • Hydraulic controls (floor mounted)
              • Light, dome (cab)
                • Lunchbox and beverage holders
                  • Monitoring system (EMS III)
                    • Mirror, rearview (externally mounted)
                      • Seat, Cat Comfort (cloth) air suspension
                        • Seatbelt, retractable, 76 mm (3 in) wide
                          • STIC control system with steering lock
                            • Tinted glass
                              • Transmission gear (indicator)
                                • Wet-arm wipers/washers (front and rear)
                                  • Power Train
                                    •  Brakes, full hydraulic, ADMETM III, enclosed, wet multiple disc service brakes
                                    •  Engine, Cat 3456 EUI direct injected diesel
                                    •  Full priming pump
                                    •  Muffler, under hood
                                    •  Parking brake
                                    •  Precleaner, engine air intake
                                    •  Radiator, Advanced Modular Cooling System (AMOCS)
                                    •  Rimpull control
                                    •  Separated cooling system
                                    •  Starting aid (ether)
                                    •  Throttle lock
                                    •  Torque Converter, Impeller Clutch with lock-up control system
                                    •  Transmission, planetary, auto-shift (4F/3R)
                                  • Other Standard Equipment
                                    •  Cab tilt support
                                    •  Demand fan
                                    •  Doors, service access (locking)
                                    •  Engine, crankcase, 600-hour interval with CH4 oil
                                    •  Hitch, drawbar with pin
                                    •  Oil sampling valves
                                    •  Stairway, left side (rear access)
                                    •  Vandalism protection and caplocks
                                    •  Venturi stack
                                  • Cab tilt support
                                    • Demand fan
                                      • Doors, service access (locking)
                                        • Engine, crankcase, 600-hour interval with CH4 oil
                                          • Hitch, drawbar with pin
                                            • Oil sampling valves
                                              • Stairway, left side (rear access)
                                                • Vandalism protection and caplocks
                                                  • Venturi stack
                                                    • Bulldozer
                                                      •  Bull dozer is not included in the standard equipment
                                                    • Bull dozer is not included in the standard equipment
                                                      • Hydraulics
                                                        •  Hydraulic oil cooler
                                                        •  Case drain filtration
                                                      • Hydraulic oil cooler
                                                        • Case drain filtration
                                                          • Tires, Rims and Wheels
                                                            •  A tire must be selected from the mandatory attachments section and base machine price includes a tire allowance
                                                          • Antifreeze
                                                            •  Premixed 50 percent concentration of Extended Life Coolant with freeze protection to -34° C (-29° F)

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