The Cat® D8T has a long history of best-in-class versatility, productivity and resale value. Because it excels across a wide range of dozing tasks, customers choose the D8T for everything from dozing, ripping, scraper work and land clearing to rough finish grading. And with features designed for even greater comfort, productivity and fuel efficiency, today’s D8T does even more to help you meet your business objectives. The D8T meets U.S. Tier 4 Interim/EU Stage IIIB/Japan MLIT Step 4 emission standards.
D8T Track-Type Tractor
Overview
D8T Track-Type Tractor
The Cat® D8T has a long history of best-in-class versatility, productivity and resale value. Because it excels across a wide range of dozing tasks, customers choose the D8T for everything from dozing, ripping, scraper work and land clearing to rough finish grading. And with features designed for even greater comfort, productivity and fuel efficiency, today’s D8T does even more to help you meet your business objectives. The D8T meets U.S. Tier 4 Interim/EU Stage IIIB/Japan MLIT Step 4 emission standards.
Specifications
U.S. Tier 4 Interim/EU Stage IIIB/Japan MLIT Step 4
U.S. Tier 4 Interim/EU Stage IIIB/Japan MLIT Step 4
Net Power (Maximum) – ISO 9249/SAE J1349
333 hp
248 kW
Net Power (Maximum) – ISO 9249/SAE J1349 (DIN)
338 hp
248 kW
Net Power (Rated) – ISO 9249/SAE J1349
317 hp
237 kW
Net Power (Rated) – ISO 9249/SAE J1349 (DIN)
322 hp
237 kW
Service Refill Capacities
Fuel Tank
170 gal
643 L
Cooling System
20.3 gal
77 L
Engine Crankcase*
10 gal
38 L
Final Drives (each)
3.3 gal
12.5 L
Roller Frames (each)
17.2 gal
65 L
Pivot Shaft Compartment
10.6 gal
40 L
Hydraulic Tank
19.8 gal
75 L
Powertrain
41 gal
155 L
Weights
Operating Weight
87733 lb
39795 kg
Operating Weight – LGP
83324 lb
37795 kg
Operating Weight – Standard
87733 lb
39795 kg
Shipping Weight – LGP
74075 lb
33600 kg
Shipping Weight – Standard
67219 lb
30490 kg
Hydraulic Controls
Pump Type
Piston-type, Variable Displacement
Piston-type, Variable Displacement
Pump Output (Steering)
73 gal/min
276 L/min
Pump Output (Implement)
60 gal/min
226 L/min
Tilt Cylinder Rod End Flow
34 gal/min
130 L/min
Tilt Cylinder Head End Flow
45 gal/min
170 L/min
Bulldozer Relief Valve Setting
3480 psi
24000 kPa
Tilt Cylinder Relief Valve Setting
3480 psi
24000 kPa
Ripper (Lift) Relief Valve Setting
3480 psi
24000 kPa
Ripper (Pitch) Relief Valve Setting
3480 psi
24000 kPa
Steering
5700 psi
39200 kPa
Transmission
1 Forward
2.1 mph
3.4 km/h
2 Forward
3.8 mph
6.1 km/h
3 Forward
6.6 mph
10.6 km/h
1 Reverse
2.8 mph
4.5 km/h
2 Reverse
5 mph
8 km/h
3 Reverse
8.8 mph
14.2 km/h
1 Forward – Drawbar Pull (1000)
139 lbf
618.5 N
2 Forward – Drawbar Pull (1000)
76 lbf
338.2 N
3 Forward – Drawbar Pull (1000)
42 lbf
186.9 N
Blades
Capacity (SAE J1265)
6.1 yd3
4.7 m3
Type
8SU LGP
8SU LGP
Capacity (SAE J1265)
11.1 yd3
8.5 m3
Digging Depth
22.7 in
577 mm
Ground Clearance
48.1 in
1222 mm
Height
5.32 ft
1622 mm
Maximum Tilt
36 in
914 mm
Total Operating Weight** (with Blade and Single-Shank Ripper)
83324 lb
37795 kg
Weight* (without hydraulic controls)
11345 lb
5146 kg
Width (over end bits)
14.8 ft
4530 mm
Type
8SU
8SU
Capacity (SAE J1265)
11.4 yd3
8.7 m3
Width (over end bits)
12.9 ft
3940 mm
Height
5.5 ft
1690 mm
Digging Depth
22.6 in
575 mm
Ground Clearance
48.2 in
1225 mm
Maximum Tilt
34.8 in
883 mm
Weight* (without hydraulic controls)
10557 lb
4789 kg
Total Operating Weight** (with Blade and Single-Shank Ripper)
87733 lb
39795 kg
Type
8U
8U
Capacity (SAE J1265)
15.3 yd3
11.7 m3
Width (over end bits)
14 ft
4267 mm
Height
5.71 ft
1740 mm
Digging Depth
22.6 in
575 mm
Ground Clearance
48.2 in
1225 mm
Maximum Tilt
37.5 in
954 mm
Weight* (without hydraulic controls)
11800 lb
5352 kg
Total Operating Weight** (with Blade and Single-Shank Ripper)
88974 lb
40358 kg
Type
8A
8A
Width (over end bits)
16.3 ft
4990 mm
Height
3.85 ft
1174 mm
Digging Depth
24.7 in
628 mm
Ground Clearance
51.5 in
1308 mm
Maximum Tilt
28.7 in
729 mm
Weight* (without hydraulic controls)
12035 lb
5459 kg
Total Operating Weight** (with Blade and Single-Shank Ripper)
89210 lb
40465 kg
Rippers
Total Operating Weight* (with SU-Blade and Ripper)
89479 lb
40587 kg
Type
Single-Shank, Adjustable Parallelogram
Single-Shank, Adjustable Parallelogram
Number of Pockets
1
1
Maximum Clearance Raised (under tip, pinned in bottom hole)
25 in
636 mm
Maximum Penetration (standard tip)
44.4 in
1130 mm
Maximum Penetration Force (shank vertical)
28620 lb
127.3 kN
Pry out Force
50070 lb
222.7 kN
Weight (without hydraulic controls)
9005 lb
4085 kg
Total Operating Weight* (with SU-Blade and Ripper)
87733 lb
39795 kg
Type
Multi-Shank, Adjustable Parallelogram
Multi-Shank, Adjustable Parallelogram
Number of Pockets
3
3
Overall Beam Width
97 in
2464 mm
Maximum Clearance Raised (under tip, pinned in bottom hole)
23.35 in
593 mm
Maximum Penetration (standard tip)
30.7 in
780 mm
Maximum Penetration Force (shank vertical)
27920 lb
124.2 kN
Pry out Force (Multi-Shank Ripper with one tooth)
51230 lb
227.9 kN
Weight (one shank, without hydraulic controls)
10752 lb
4877 kg
Additional Shank
732 lb
332 kg
Winches
Winch Model
PA14OVS
PA14OVS
Weight*
3947 lb
1790 kg
Oil Capacity
4 gal
15 L
Increased Tractor Length
22.2 in
563 mm
Winch Case Width
45.6 in
1160 mm
Drum Width
12.6 in
320 mm
Flange Diameter
18 in
457 mm
Cable Ferrule Sizes – Length
2.76 in
70 mm
Cable Ferrule Sizes – Outside Diameter
2.36 in
60 mm
Drum Capacity – Optional Cable
193 ft
59 m
Drum Capacity – Recommended Cable Size
276 ft
84 m
Optional Cable Size
1.25 in
32 mm
Recommended Cable Size
1.13 in
29 mm
Winch Length
56.3 in
1430 mm
Standards
ROPS/FOPS
Standards
Standards
Sound
Standards
Standards
Brakes
Standards
Standards
Undercarriage – Standard
Ground Clearance
24.1 in
613 mm
Ground Contact Area
6060 in2
3.91 m2
Ground Pressure (ISO 16754)
13 psi
89.6 kPa
Grouser Height
3.1 in
78 mm
Length of Track on Ground
126 in
3206 mm
Pitch
8.5 in
216 mm
Shoe Type
Moderate Service
Moderate Service
Shoes/Side
44
44
Track Gauge
82 in
2083 mm
Track Rollers per Side
8
8
Width of Shoe
24 in
610 mm
Undercarriage – LGP
Ground Clearance
24.1 in
613 mm
Ground Contact Area
9593 in2
6.19 m2
Ground Pressure (ISO 16754)
7.8 psi
54 kPa
Grouser Height
3.1 in
78 mm
Length of Track on Ground
126 in
3206 mm
Pitch
8.5 in
216 mm
Shoe Type
Moderate Service
Moderate Service
Shoes/Side
44
44
Track Gauge
92 in
2337 mm
Track Rollers per Side
8
8
Width of Shoe
38 in
965 mm
Benefits & Features
The D8T cab is designed and equipped for operator productivity, safety and comfort. Large single-pane windows, tapered hood and notched fuel tank provide excellent visibility to all sides of the machine and around the job site. New standard and optional light packages extend the productive work day.
The D8T features an updated in-dash display with new functionalities. An improved Advisor Monitoring System tracks machine operating conditions in real time. An integrated grade control system display mount puts job site data conveniently in front of the operator.
Operators will enjoy comfort features like standard air-ride suspension seat, adjustable armrests and well-positioned air vents. The cab is radio ready and includes a personal music player jack. A power converter supplies supplemental power for cellular phones and computers. New finishes make the cab easier to clean.
The D8T features a Cat® C15 ACERT™ engine and a Cat Clean Emissions Module to deliver the performance and efficiency that customers demand, while meeting U.S. EPA Tier 4 Interim/EU Stage IIIB/Japan MLIT Step 4 emission standards.
The six-cylinder electronic engine is turbocharged and aftercooled. The displacement produces better lugging capability, lower internal stresses and longer component life.
ACERT Technology is a combination of building blocks that includes electronics, fuel systems, air management systems and aftertreatment components. The system is optimized based on engine size, the type of application and the geographic location in which it will work. The technologies are applied systematically and strategically to meet high customer expectations for productivity, fuel efficiency, reliability and service life.
The Cat NOx Reduction System captures and cools a small quantity of exhaust gas, then routes it into the combustion chamber where it drives down combustion temperatures and reduces NOx emissions.
Aftertreatment Technologies
To meet Tier 4 Interim/Stage IIIB/Japan MLIT Step 4 emission standards and beyond, Cat aftertreatment components have been designed to match application needs. System components include a Diesel Oxidation Catalyst (DOC), which uses a chemical process to convert regulated emissions in the exhaust system, and a Diesel Particulate Filter (DPF) that traps particulate matter that is carried into the exhaust stream.
The DOC, DPF and Cat Regeneration System are contained in a Caterpillar designed Clean Emissions Module (CEM) that protects the components, minimizes the aftertreatment footprint and simplifies maintenance. An optional insulated Clean Emissions Module is available for high debris applications that require thermal shields on exhaust components.
Cat Regeneration System
The Cat Regeneration System is designed to work transparently, without any interaction needed from the operator. Under most operating conditions, engine exhaust is hot enough to oxidize soot through passive regeneration. If supplemental regeneration is needed, the Cat Regeneration System elevates exhaust gas temperatures to burn off soot in the Diesel Particulate Filter (DPF). This is a process that happens automatically, but the operator can initiate the cycle when convenient or interrupt regeneration as needed. A soot level monitor and regeneration indicator lights are integrated into the D8T dash display.
Delayed Engine Shutdown
Delayed Engine Shutdown feature is available to allow the machine to cool immediately after a heavy work load or regeneration cycle.
Engine Idle Shutdown Timer
An optional Engine Idle Shutdown timer will sound a warning and shut down the engine after the machine has been idling for a pre-set period of time.
From engine to transmission to final drives, the D8T powertrain is designed to turn power into productive work. The D8T offers unmatched lugging capability and smooth shifting when changing gears under varying loads. The 3-speed forward, 3-speed reverse transmission, backed by differential steering, offers excellent run out speeds and accurate steering capability.
Torque Divider
A robust, high efficiency torque divider provides high torque multiplication to move heavy loads, while shielding the drive train from sudden torque shocks and vibration.
Differential Steering System
Differential steering maintains full power to both tracks for best-in-class turning under load. When one track speeds up, the other slows down an equal amount. Maneuverability – especially with large blade loads – is improved, as well as cycle times in some applications. Greater load capacity, power and speed control are possible in soft underfoot conditions on steep slopes because both tracks are powered during turns.
Planetary Power Shift Transmission
The planetary power shift transmission offers smooth shifting and quick speed and directional changes for maximum productivity. The transmission is built for long life, and a modular design allows for ease of service without removing other components.
Enhanced Auto Shift
The new Enhanced Auto Shift feature uses the simple “shift up, idle back” principle during forward and reverse travel to save fuel and improve overall dozing cycle fuel efficiency.
Auto-Shift/Auto-Kickdown
Auto-shift allows the operator, by just making a directional change, to go from preset forward to preset reverse gears. Auto‑kickdown automatically downshifts the transmission when significant load increases are detected. These features are especially useful when backfilling or rough grading. Operators can select from a variety of settings, and can override the automatic shift features at any time.
A new steering tiller is ergonomically designed to improve operator comfort. The new thumb roller on the steering control shifts the electronically controlled powershift transmission. The tiller allows precise steering in close areas with the finest modulation in the industry.
Dozer Control Lever
The D8T features an ergonomically designed dozer lever with low effort, electro-hydraulic controls for added operator comfort, ease of operation and precise work tool control. Features such as blade response, blade float, auto blade pitch and spread rate can be set up and adjusted using the Advisor panel. When equipped, single-handle convenience also controls functions like AccuGrade and Dual Tilt.
Electronic Ripper Control
A rigidly mounted handgrip provides firm support for the operator even when ripping in the roughest terrain. Thumb and fingertip controls direct ripper functions. Programmable features like Auto Lift, Shank-Out, Auto Stow and Automatic Ripper Control help increase operator efficiency.
Throttle Rocker Switch
One touch of the throttle rocker switch automatically adjusts engine speed to high or low idle. A new feature allows the operator to press and hold until desired engine speed is reached, then release for the machine to maintain the new chosen speed.
Implement and Steering Controls
Ergonomically designed for ease of operation »Learn More
Caterpillar is the only manufacturer to offer fully-integrated electronic technology solutions that enable greater accuracy, higher productivity, lower operating costs and more profitability.
Cat AccuGrade™
AccuGrade uses laser, optical and satellite guidance technologies, machine sensors, and automatic blade control to help operators get to grade faster, easier and more efficiently. Digital design plans, real-time cut/fill data, and in-cab guidance give operators detailed information to work more confidently and achieve greater accuracy, in fewer passes, using less material. Operators can stay on grade and improve productivity and accuracy by nearly 50 percent over conventional methods. Grade stakes and checkers are minimized, helping to make the work site safer, more efficient, and more cost effective.
The D8T comes standard with wiring harnesses routed through the machine during assembly to protect from wear and simplify installation of the AccuGrade system. Deep integration optimizes machine and system performance and provides optimal mounting locations for easy operator interaction. Brackets and hardware are provided with the optional AccuGrade Ready Option (ARO).
Computer Aided Earthmoving System (CAES)
CAES uses satellite guidance technology, machine sensors, a radio network, and office management software to deliver real-time grading and productivity information to operators. Accurate cut and fill data ensures proper grade control and targeted removal of overburden in stockpile and quarrying operations. Data collection capabilities enable accurate recordkeeping of material placement and validation.
Cat Product Link™
Product Link helps take the guesswork out of equipment management with remote monitoring capabilities for one machine or your entire fleet. Track asset location, hours, fuel usage, diagnostic codes, idle time and more through the secure VisionLink™ user interface. Knowing where your equipment is, what it’s doing and how it’s performing enables you or your Cat dealer to manage your fleet in real-time so you can maximize efficiency, improve productivity, and lower operating costs.
VIMS™
VIMS uses deeply integrated sensors in the brake, transmission and engine systems to constantly provide machine condition and performance information. Actionable reports give you insight to proactively manage maintenance and repairs to help you maximize machine availability and uptime for greater fleet productivity and profit.
Integrated Technologies
Solutions to make work easier and more efficient »Learn More
Bulldozers
High tensile strength steel with a strong box-section design stands up to the most severe applications. Heavy moldboard construction and hardened bolt-on cutting edges and end bits add strength and durability. Optional rock guards and deflector shields help protect cylinders. High-Capacity Universal, Semi-Universal and Angle Blades are available, as well as special configurations for coal and woodchip stockpile applications.
Optional Dual Tilt
Dual Tilt improves load control and allows the operator to optimize the blade pitch angle for better balance and productivity. Tilt the blade forward for better penetration, then tilt back to increase carrying capacity.
Optional Auto Blade Assist
Auto Blade Assist automates blade pitch and lift control during a typical dozing cycle to help reduce operator fatigue.
Rippers
The standard D8T implement valve is ready for ripper installation, giving you the flexibility to use one, two or three shanks. A Single-Shank Ripper is recommended in severe applications. A Multi-Shank Ripper is best in less severe applications or if ripping near a high wall.
Hydraulics
Field-proven load-sensing hydraulics continually respond to operating requirements by automatically adjusting attachment hydraulic power for maximum efficiency. High efficiency, variable displacement pumps supply maximum flow rates for tough applications, implement power on demand, and consistent pressure output for quick response. Variable flow design minimizes hydraulic oil temperatures and helps save fuel.
Rear Counterweights
Rear counterweights provide proper tractor balance to maximize dozing production and are recommended when tractor is not equipped with any other rear attachment.
Winches
Please consult your Cat dealer for available winch options.
The engine radiator, Air To Air After Cooler (ATAAC) and hydraulic oil cooler are packaged in a single plane. Aluminum bar plate construction aids durability and allows for higher heat transfer and superior corrosion resistance. The standard cores feature 6 fins per inch to allow debris to pass through and reduce plugging concerns.
In cooler conditions, a Hydraulically Driven Demand Fan reduces speed to conserve power, save fuel, and decrease sound levels.
An optional Reversing Fan can be set to change air flow direction, efficiently removing debris from the cooling cores without the operator leaving the cab. To improve core serviceability, the cooling package also includes air wand or brush access slots. The ROPS mounted air conditioning system works with the reversing fan for optimum fan purging and ambient cooling capability.
The D8T is available in Standard and Low Ground Pressure (LGP) configurations to suit your application needs.
The machine features the Cat elevated sprocket design that isolates final drives, axles, and steering components from harsh impacts. The modular design aids serviceability to help reduce maintenance costs. A variety of undercarriage configurations and track shoe designs help optimize performance and undercarriage life.
Heavy Duty Undercarriage with Positive Pin Retention Moderate Service Sealed and Lubricated Track is standard. This undercarriage is well suited to aggressive applications like land clearing, side-slopes, or working in rocky or uneven terrain. Components are designed for extended wear life in abrasive conditions and high impact applications.
SystemOne™ Undercarriage is available as an option and can help reduce total undercarriage owning and operating costs in many applications. SystemOne features lifetime sealed and lubricated cartridges to eliminate bushing turns, and sprockets require no replacement during the life of the chain. All SystemOne undercarriage components are designed to work and wear as a system for longer track life.
The D8T mainframe is built industry-leading tough – heavy steel castings, full box section frame rails and continuous rolled sections on top and bottom frame rails provide the strength to absorb high impact shock loads and twisting forces.
The D8T pivot shaft runs through the mainframe and connects to the roller frames, allowing independent oscillation. The full-length pivot shaft distributes impact loads throughout the case, reducing the bending stress on the case. The Tag-Link brings the blade closer to the machine for more precise dozing and load control. The design provides solid lateral stability and better cylinder positions for constant break out force, independent of blade height.
Cat track-type tractor frames set the industry standard for durability. Major structures and components are built to be rebuilt, reducing waste and replacement costs.
Structures
Engineered for maximum production and service life »Learn More
Features like Enhanced Auto Shift and a Hydraulic Demand Fan help decrease overall fuel consumption.
Technologies like AccuGrade and Product Link help improve overall efficiency, saving fuel and fluids, as well as wear and tear.
New grab handles, steps, lighting packages and a ground level service center help enhance job site safety.
Major components are built to be rebuilt, eliminating waste and saving customers money by giving the machine a second – and even third – life.
Approximately 98% of machine materials can be recycled (ISO 16714), conserving valuable natural resources and further enhancing machine end-of-life value.
The D8T offers full left-side engine serviceability, including fill tube, dipstick, air cleaner, fuel filters, oil filter and coolant level check. Cooling system access is also improved for inspection and cleaning. To reduce maintenance cost and time, the D8T features a new high capacity filter element and improved powertrain filter bypass strategy to extend service intervals. The in-cab monitoring system also provides electronic fluid level verification at startup for the coolant, powertrain and engine oil systems.
Ground Level Service Center
The new ground level service center is accessible on the left hand fender without setting foot on the machine, giving easy access to the battery disconnect, secondary engine shutdown and access light switches. A digital hour meter is also available.
Access/Egress
Newly designed steps and handrails make climbing on and off the tractor easier than ever. An access light switch turns on the cab or exterior light for night time visibility when mounting/dismounting the machine.
An Operator Not Present Monitoring system allows the machine to idle when an operator is not in the seat. The system locks out the powertrain so any unintentional movements during ingress or egress will not physically move the machine.
Renowned Cat Dealer Support
From helping you choose the right machine to knowledgeable ongoing support, Cat dealers provide the best in sales and service. Manage costs with preventive maintenance programs like Custom Track Service, Scheduled Oil Sampling (S·O·SSM) analysis, and guaranteed maintenance contracts. Stay productive with best-in-class parts availability. Cat dealers can even help you with operator training to help you boost your profits.
And when it’s time for machine replacement, your Cat dealer can help you save even more with Genuine Cat Reman parts. Receive the same warranty and reliability as new products at cost savings of 40 to 70 percent for powertrain and hydraulic components.
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