844 | Toromont Cat

Cat Wheel Dozers offer high production capabilities, along with mobility and versatility. These outstanding utility machines are engineered for demanding work and are an excellent choice for applications including surface mining, cleanup, stock piles, road maintenance, reclamation and jobs where travel is required between multiple sites. The Cat Wheel Dozers line will keep your material moving with reliability, efficiency and low operating costs.

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Specifications

Air Conditioning System

Air Conditioning

The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. - If equipped with R134a (Global Warming Potential = 1430), the system contains 1.8 kg (3.9 lb) of refrigerant, which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons).
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Axles

Front

Fixed
{"Name":"Front","SpecificationId":null,"TextValue":"Fixed","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Axles","SortOrder":"80"}
Rear

Trunnion
{"Name":"Rear","SpecificationId":null,"TextValue":"Trunnion","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Axles","SortOrder":"81"}
Oscillation Angle

8.5 ° 8.5 °
{"Name":"Oscillation Angle","SpecificationId":null,"TextValue":null,"EnglishUnit":"°","EnglishValue":"8.5","MetricUnit":"°","MetricValue":"8.5","Type":"measurement","SpecificationGroup":"Axles","SortOrder":"82"}

Brakes

Brakes

Meets ISO 3540:2011
{"Name":"Brakes","SpecificationId":null,"TextValue":"Meets ISO 3540:2011","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Brakes","SortOrder":"90"}

Cab

ROPS/FOPS

ISO 3471:2008 and ISO 3449:2005 Level II Standards
{"Name":"ROPS/FOPS","SpecificationId":null,"TextValue":"ISO 3471:2008 and ISO 3449:2005 Level II Standards","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Cab","SortOrder":"120"}

Dimensions (Approximate)

Height - Top of ROPS

17.2 ft 5240 mm
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Height - Top of Exhaust Pipe

16.6 ft 5049 mm
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Height - Top of Hood

12.7 ft 3862 mm
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Ground Clearance

2 ft 596 mm
{"Name":"Ground Clearance","SpecificationId":null,"TextValue":null,"EnglishUnit":"ft","EnglishValue":"2","MetricUnit":"mm","MetricValue":"596","Type":"measurement","SpecificationGroup":"Dimensions (Approximate)","SortOrder":"133"}
Centerline of Front Axle to Hitch

7.5 ft 2300 mm
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Centerline of Rear Axle to Edge of Bumper

12.5 ft 3795 mm
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Wheel Base

15.1 ft 4600 mm
{"Name":"Wheel Base","SpecificationId":null,"TextValue":null,"EnglishUnit":"ft","EnglishValue":"15.1","MetricUnit":"mm","MetricValue":"4600","Type":"measurement","SpecificationGroup":"Dimensions (Approximate)","SortOrder":"136"}
Length - With Blade on Ground

36.5 ft 11120 mm
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Engine

Engine Model

Cat® C27
{"Name":"Engine Model","SpecificationId":null,"TextValue":"Cat® C27","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Engine","SortOrder":"1"}
Net Power - SAE J1349:2011 - Standard Ambient

732 hp 546 kW
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Rated Speed

1800 r/min 1800 r/min
{"Name":"Rated Speed","SpecificationId":null,"TextValue":null,"EnglishUnit":"r/min","EnglishValue":"1800","MetricUnit":"r/min","MetricValue":"1800","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"4"}
Emissions

Option 1 - U.S. EPA Tier 4 Final / EU Stage V
{"Name":"Emissions","SpecificationId":null,"TextValue":"Option 1 - U.S. EPA Tier 4 Final / EU Stage V","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Engine","SortOrder":"5"}
Engine Power - ISO 14396:2002

786 hp 586 kW
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Gross Power - SAE J1995:2014

801 hp 597 kW
{"Name":"Gross Power - SAE J1995:2014","SpecificationId":null,"TextValue":null,"EnglishUnit":"hp","EnglishValue":"801","MetricUnit":"kW","MetricValue":"597","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"7"}
Net Power - SAE J1349:2011 - High Ambient

681 hp 508 kW
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Emissions

Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2
{"Name":"Emissions","SpecificationId":null,"TextValue":"Option 2 - China Nonroad Stage III emissions standards, equivalent to U.S. EPA Tier 2","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Engine","SortOrder":"9"}
Engine Power - ISO 14396: 2002

752 hp 561 kW
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Gross Power - SAE J1995:2014

766 hp 571 kW
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Net Power - SAE J1349:2011 - Standard Ambient

699 hp 521 kW
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Net Power - SAE J1349:2011 - High Ambient

648 hp 483 kW
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Bore

5.4 in 137.2 mm
{"Name":"Bore","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"5.4","MetricUnit":"mm","MetricValue":"137.2","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"14"}
Stroke

6 in 152.4 mm
{"Name":"Stroke","SpecificationId":null,"TextValue":null,"EnglishUnit":"in","EnglishValue":"6","MetricUnit":"mm","MetricValue":"152.4","Type":"measurement","SpecificationGroup":"Engine","SortOrder":"15"}
Displacement

1649.5 in³ 27.03 l
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Peak Torque - Speed

2624 lb/ft 3557 N·m
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Torque Rise

18 % 18 %
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Note

Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator.
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Hydraulic System - Lift/Tilt

Output at 2,000 rpm and 6900 kPa (1,000 psi)

82 gal/min 311 l/min
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Cylinders, Double Acting - Lift, Bore and Stroke

133 mm × 1535 mm (5.25 in × 60.4 in)
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Cylinder, Double Acting - Tilt and Tip, Bore and Stroke

210 mm × 188 mm (8.25 in × 7.4 in)
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Relief Valve Setting - Bulldozer (Large Pump)

2700 psi 18650 kPa
{"Name":"Relief Valve Setting - Bulldozer (Large Pump)","SpecificationId":null,"TextValue":null,"EnglishUnit":"psi","EnglishValue":"2700","MetricUnit":"kPa","MetricValue":"18650","Type":"measurement","SpecificationGroup":"Hydraulic System - Lift/Tilt","SortOrder":"43"}
Relief Valve Setting - Tilt Cylinders (Small Pump)

2920 psi 20150 kPa
{"Name":"Relief Valve Setting - Tilt Cylinders (Small Pump)","SpecificationId":null,"TextValue":null,"EnglishUnit":"psi","EnglishValue":"2920","MetricUnit":"kPa","MetricValue":"20150","Type":"measurement","SpecificationGroup":"Hydraulic System - Lift/Tilt","SortOrder":"44"}

Hydraulic System - Steering

Steering System - Circuit

Pilot, load sensing
{"Name":"Steering System - Circuit","SpecificationId":null,"TextValue":"Pilot, load sensing","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"50"}
Steering System - Pump

Piston, variable displacement
{"Name":"Steering System - Pump","SpecificationId":null,"TextValue":"Piston, variable displacement","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"51"}
Minimum Turning Radius - Over Blade

34 ft 10369 mm
{"Name":"Minimum Turning Radius - Over Blade","SpecificationId":null,"TextValue":null,"EnglishUnit":"ft","EnglishValue":"34","MetricUnit":"mm","MetricValue":"10369","Type":"measurement","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"52"}
Total Steering Angle

35 ° 35 °
{"Name":"Total Steering Angle","SpecificationId":null,"TextValue":null,"EnglishUnit":"°","EnglishValue":"35","MetricUnit":"°","MetricValue":"35","Type":"measurement","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"53"}
Maximum Flow

94.3 gal/min 357 l/min
{"Name":"Maximum Flow","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal/min","EnglishValue":"94.3","MetricUnit":"l/min","MetricValue":"357","Type":"measurement","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"54"}
Relief Valve Setting

4500 psi 31000 kPa
{"Name":"Relief Valve Setting","SpecificationId":null,"TextValue":null,"EnglishUnit":"psi","EnglishValue":"4500","MetricUnit":"kPa","MetricValue":"31000","Type":"measurement","SpecificationGroup":"Hydraulic System - Steering","SortOrder":"55"}

Operating Specifications

Operating Weight

165089 lb 74883 kg
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Blade Capacity Range

20.8 yd³ 15.9 m³
{"Name":"Blade Capacity Range","SpecificationId":null,"TextValue":null,"EnglishUnit":"yd³","EnglishValue":"20.8","MetricUnit":"m³","MetricValue":"15.9","Type":"measurement","SpecificationGroup":"Operating Specifications","SortOrder":"20"}

Service Refill Capacities

Fuel Tank - Standard

286.6 gal (US) 1085 l
{"Name":"Fuel Tank - Standard","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"286.6","MetricUnit":"l","MetricValue":"1085","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"60"}
Cooling System

54.9 gal (US) 208 l
{"Name":"Cooling System","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"54.9","MetricUnit":"l","MetricValue":"208","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"61"}
Crankcase

20 gal (US) 76 l
{"Name":"Crankcase","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"20","MetricUnit":"l","MetricValue":"76","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"62"}
Transmission

29.1 gal (US) 110 l
{"Name":"Transmission","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"29.1","MetricUnit":"l","MetricValue":"110","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"63"}
Differential - Final Drives - Front

71.6 gal (US) 271 l
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Differential - Final Drives - Rear

68.9 gal (US) 261 l
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Hydraulic System - Implement and Hydraulic Fan

68.9 gal (US) 261 l
{"Name":"Hydraulic System - Implement and Hydraulic Fan","SpecificationId":null,"TextValue":null,"EnglishUnit":"gal (US)","EnglishValue":"68.9","MetricUnit":"l","MetricValue":"261","Type":"measurement","SpecificationGroup":"Service Refill Capacities","SortOrder":"66"}
Hydraulic System - Steering and Braking

34.9 gal (US) 132 l
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Sound Performance - Tier 2

Operator Sound Pressure Level (ISO 6396:2008)

72 dB(A) 72 dB(A)
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Machine Sound Power Level (ISO 6395:2008)

116 dB(A) 116 dB(A)
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Operator Sound Pressure Level (ISO 6396:2008)*

72 dB(A) 72 dB(A)
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Machine Sound Power Level (ISO 6395:2008)*

114 dB(A) 114 dB(A)
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Note (1)

*Sound suppression equipped
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Note (2)

The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
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Note (3)

The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
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Note (4)

Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.
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Sound Performance - Tier 4 Final / Stage V

Operator Sound Pressure Level (ISO 6396:2008)

72 dB(A) 72 dB(A)
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Machine Sound Power Level (ISO 6395:2008)

116 dB(A) 116 dB(A)
{"Name":"Machine Sound Power Level (ISO 6395:2008)","SpecificationId":null,"TextValue":null,"EnglishUnit":"dB(A)","EnglishValue":"116","MetricUnit":"dB(A)","MetricValue":"116","Type":"measurement","SpecificationGroup":"Sound Performance - Tier 4 Final / Stage V","SortOrder":"101"}
Operator Sound Pressure Level (ISO 6396:2008)*

72 dB(A) 72 dB(A)
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Machine Sound Power Level (ISO 6395:2008)*

114 dB(A) 114 dB(A)
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Note (1)

*Sound suppression equipped
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Note (2)

The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
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Note (3)

The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed.
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Note (4)

Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment.
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Transmission

Transmission Type

Cat Planetary Power Shift
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Converter Drive - Forward 1

4.5 mile/h 7.3 km/h
{"Name":"Converter Drive - Forward 1","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"4.5","MetricUnit":"km/h","MetricValue":"7.3","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"31"}
Converter Drive - Forward 2

8.3 mile/h 13.3 km/h
{"Name":"Converter Drive - Forward 2","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"8.3","MetricUnit":"km/h","MetricValue":"13.3","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"32"}
Converter Drive - Forward 3

14.2 mile/h 22.9 km/h
{"Name":"Converter Drive - Forward 3","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"14.2","MetricUnit":"km/h","MetricValue":"22.9","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"33"}
Converter Drive - Reverse 1

4.9 mile/h 7.9 km/h
{"Name":"Converter Drive - Reverse 1","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"4.9","MetricUnit":"km/h","MetricValue":"7.9","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"34"}
Converter Drive - Reverse 2

9.1 mile/h 14.7 km/h
{"Name":"Converter Drive - Reverse 2","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"9.1","MetricUnit":"km/h","MetricValue":"14.7","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"35"}
Converter Drive - Reverse 3

15.5 mile/h 24.9 km/h
{"Name":"Converter Drive - Reverse 3","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"15.5","MetricUnit":"km/h","MetricValue":"24.9","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"36"}
Direct Drive - Forward 1

Lock-up disabled
{"Name":"Direct Drive - Forward 1","SpecificationId":null,"TextValue":"Lock-up disabled","EnglishUnit":null,"EnglishValue":null,"MetricUnit":null,"MetricValue":null,"Type":"text","SpecificationGroup":"Transmission","SortOrder":"37"}
Direct Drive - Forward 2

8.5 mile/h 13.7 km/h
{"Name":"Direct Drive - Forward 2","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"8.5","MetricUnit":"km/h","MetricValue":"13.7","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"38"}
Direct Drive - Forward 3

15.2 mile/h 24.5 km/h
{"Name":"Direct Drive - Forward 3","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"15.2","MetricUnit":"km/h","MetricValue":"24.5","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"39"}
Direct Drive - Reverse 1

5.4 mile/h 8.7 km/h
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Direct Drive - Reverse 2

9.6 mile/h 15.4 km/h
{"Name":"Direct Drive - Reverse 2","SpecificationId":null,"TextValue":null,"EnglishUnit":"mile/h","EnglishValue":"9.6","MetricUnit":"km/h","MetricValue":"15.4","Type":"measurement","SpecificationGroup":"Transmission","SortOrder":"41"}
Direct Drive - Reverse 3

16.4 mile/h 26.4 km/h
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Note

Travel speeds based on 45/65-45 L-5 46 ply tires.
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Benefits

The full box-section rear frame resists torsional shock and twisting forces.
Solid through-width push beams transfer and absorb stresses through a larger portion of the frame.
Robust structures withstand the toughest conditions and multiple lifecycles to help improve your bottom line.
Resilient, durable blades are designed with excellent dozing and rolling characteristics.
Optimized axle mounting helps result in increased structural integrity.
Castings in the engine and frame are used in high stress areas to spread high loads.
One-piece castings help enhance strength in key pin areas.

Experience reliable efficiency with complete control over injection timing, duration, and pressure with Mechanically Actuated Electronic Unit Injection (MEUI™).
World-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) help 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 helps protect investment and helps lengthen lifecycle.

Battery disconnect, emergency engine shutdown, and stairway light switch are accessed through the ground level power service center.
Optional Cat Detect with Object Detection System (rearview camera and radar) or Vision (rearview camera) help increase operator awareness around the machine.
Cab-mounted LED strobes provide warning for others near the machine.
Wider stairs with reduced stair angles help increase safety for operators.
Access stairs via a powered platform from cab or ground level and have emergency exit access.

Integrated technologies assist with monitoring, managing, and enhancing your jobsite operations.
Product Link™ remote monitoring helps provide 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™) 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 help enhance awareness of the environment around the machine for increased safety.

Steering and Transmission Integrated Control System (STIC™) combines directional selection, gear selection, and steering into a single lever, helping to maximize 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 seat-mounted implement and steering controls.
Reduced interior sound levels help keep operators comfortable throughout their entire shift.

Meets U.S. EPA Tier 4 Final emissions standards or equivalent to U.S. EPA Tier 2.
Automatic Engine Idle Shutdown helps conserve 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 percent cost savings.
Retrofit packages from Caterpillar deliver new features to older machines to get the most from your investment.

Swing-out fuel, hydraulic oil coolers, and condenser allow for easy access cleanout.
Machine features ground level or platform access to easily reach daily service points.
Swing-out doors on either side of the engine compartment help provide easy access to critical daily service checks.
Optional tire pressure monitoring system provides real-time information to the operator in the cab for optimized tire life.
Electronics bay is conveniently located inside the cab.
Sight gauges offer quick visual inspection to help minimize fluid contamination.
Lighting inside the engine compartment helps improve visibility to service points.
Ecology drains help prevent spills and allow for easier service.
500-hour engine oil and filter change interval with S•O•S oil sampling analysis.
Service center includes drain and fill, electronic technician connection, and fluid level status.
Axle oil cooler and Automatic Retarder Control helps prevent unnecessary wear from accelerating down declines.

Dependable blades are designed for mining with press rib construction and optimized widths and capacities for excellent dozing and rolling.
Heavy-Duty Semi-U blade includes a Hardox 400 Liner plate, side plates, and additional reinforcements at the bottom of the blade.
Equipped with the Cat MineStar System, a suite of integrated mine operations and mobile equipment technologies.
Cat MineStar’s capabilities help manage all aspects of operation.
Fleet provides remote machine tracking capabilities.
Terrain for Loading helps enable high precision management of load management.
Detect assists the operator with areas of limited visibility.
Health delivers machine condition and operating data and diagnostic tools for a long machine lifecycle.

Equipment Info

NOTE

Standard and optional equipment may vary. Consult your Cat dealer for details.

TRAMMING

Front fenders

ELECTRICAL AND LIGHTING

Alternator, 150 amp

POWERTRAIN

Brakes, oil cooled, multi-disc, service/secondary

OPERATOR ENVIRONMENT

Advisor display, displays real time operating information, performs calibrations and customizes operator setting

SAFETY

Alarm, back-up

SERVICE

Axle ecology drains

COOLING

Standard ambient package (recommended for site conditions that do not exceed 43°C (110°F)

COLD WEATHER

Heated seat

EFFICIENCY

Economy mode with on demand throttle

Product Brochures

Product Brochure #1

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