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8/10/2019 D8T Introduction
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D8T Introduction Sales Model D8T S/N Prefix KPZ (EP)
J8B (CBL) Pilot Production MAY04 Full Production OCT04 Replaces D8R Series II
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Serv Comm 2003 Caterpillar Confidential: Yellow
D8T Introduction
D8R Series I D8R Series II D8TModel Name 3406C 3406E C-15Displacement 14.6L I-6 14.6L I-6 15.2L I-6Emission Compliance EPA Tier I EPA Tier 2 EPA Tier 3
EU Stage II EU Stage IIIA
Net Flywheel Power 305 HP 310 HP 310 HPRated Engine Speed 2100 rpm 2000 rpm 1850 rpmFuel System pump & lines MEUI MEUI w/ ACERTEngine Control mechanical ADEM II A4Turbo water-cooled (opt) water-cooled water-cooled
wastegatedPriming Pump Mechanical Mechanical ElectricStarting Assist Ether Ether Ether
JW Heater (opt) JW Heater (opt) JW Heater (opt)Thermal Shield hard wrap (opt) hard wrap (opt) soft wrap (opt)Oil Change Interval 250 hr 500 hr (CG or better) 500 hr (CH or better)
Engine Comparison
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Ether Aid
Engine Oil Fill, Filter & Gage
Underhood Service Light
Electric Fuel Priming Pump
Serv Comm 2003 Caterpillar Confidential: Yellow
Left Hand Engine Serviceability
D8T Introduction
Primary Fuel Filter w/ Water Separator
Coolant Level Sight Gage
Air Filter
Jump Start Receptacle
High Speed Engine & Powertrain OilChange (option)
Water Heater Receptacle (option)
Secondary Fuel Filter
Engine Oil Pressure & SOS Ports
Coolant Sampling Port
Larger Hinged Enclosure Door
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Serv Comm 2003 Caterpillar Confidential: Yellow
D8T IntroductionCooling System Hydraulically Driven Fan
Optional Reverse to Purge Valve
Hydraulic Cooler
A/C Condenser
Aluminum ATAAC
Coolant Modules
Shunt Tank
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Serv Comm 2003 Caterpillar Confidential: Yellow
D8T Introduction
D8R Series I D8R Series II D8TImplement Valve Cat "B" Valve Cat "B" Valve Cat "B" Valve
direct actuation pilot control E/H controlImplement Pump Vickers 131cc Vickers 131cc Rexroth 140cc
variable piston variable piston variable pistonload-sensing load-sensing load-sensing
Steering Pump Rexroth 180cc Rexroth 180cc Rexroth 180ccvariable piston variable piston variable piston
pilot control pilot control E/H controlSteering Motor Rexroth 180cc Rexroth 180cc Rexroth 180cc
fixed piston fixed piston fixed pistonw/ speed sensor
Fan Pump ---- ---- Rexroth 45cc
---- ---- variable piston---- ---- E/H controlFan Motor ---- ---- Rexroth 45cc
---- ---- fixed pistonFiltration tank, steering
chargetank + steering
chargetank + steering charge +
implement pilot
Hydraulic Comparison
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D8T IntroductionPowertrain Changes
PTO Lines Simplification case-mounted PTO pump relocated priority valve
Minor torque converter and transmission changes to
accommodate lower rated engine speed Common XMSN and Brake Top Pressures
Eliminates Individual Clutch Calibration Eliminate Intermediate Speed Sensors Remote Clutch Pressure Taps (change to Series II in 2003) Full 6-micron filtration with additional media capacity A4 replaces MAC14 Electronic Control
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D8T IntroductionHydraulic and Powertrain Layout
Case Mounted Powertrain Pump
Relocated Charge Filter
Rexroth Impl Pump w/ Thru Drivefor PTO Pump
Integral Powertrain Priority Valve& Filter Base
Relocated Implement Valve withIntegral Pilot Filter and Lockout
Case Mounted Powertrain Pump
Rexroth Steering/Fan Tandem Pump
Relocated Steering Charg Filter
New Hydraulic Tank
Rexroth Fan Motor
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Basic EngineThrottle/Decel
Altitude DerateFuel Temp CompDemand FanReversing Fan
Ether AssistElevated IdleSync Clock MasterPrelubDiagnostics
XMSN ClutchesService BrakesParking Brake
Auto-Brake (D8)(EngineOverspeed
Protection)E/H Diff SteerNeutral Start LogicMachine SecurityDiagnostics
Blade ControlRipper ControlWinch ControlImpl LockoutQuick Drop (D9)Pump Overspeed
Protection Auto-CarryE/H Diff Steer
Auto-Brake Advanced Blade
Control InterfaceDiagnostics
MonitoringWarning MessagesOperator InputOperator SettingsService InfoGages
Coolant TempHyd TempTCO TempFuel LevelHourmeterTachGear Indicator
Indicator Status
Events and StatusMachine ConfigFlash SoftwareSync Clock AdjustHistogram Download
D8T/D9T Electronic SystemOptional Advanced Blade Control Devices
D8T Introduction
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D8T Introduction
Improved corner casting transition
Wider Pin Spread Reduces Load & Wear
8mm Aperature Plate IncreasesStiffness Significantly
Deeper Box Sections
Open top for shunt tank and core removal
Radiator Guard Durability
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Crossbeam moved forward tofacilitate hydraulic pumpremoval
Pinned Crossbeam
Supports
Serv Comm 2003 Caterpillar Confidential: Yellow
Fender and Support Durability
D8T Introduction
Fender Clearance Increase
Crossbeam serves as supportfor rear of hood
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D8T IntroductionTrack Roller Frame Changes
Integral Carrier RollerMounting Provision
Additional Track Adjustmentto 120% U/C Wear
Rear Frame -- Two-piececasting replaces three piececasting
Increased Recoil Force
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D8T IntroductionOther Changes
Larger Cab with Wider Seat Well Area ROPS, Fuel Tank, Hydraulic Tank, Fender, Battery Box Changes to
Accommodate Larger Operator Station Slight Increase in Fender Clearance Relocated HVAC from Dash to RH Side Rear Hood Support Mounted to Crossbeam Instead of Platform Compound-Angled Engine Enclosures for Visibility Polyvee Alternator and A/C Compressor w/ Auto Tensioner Removable Tool Box
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D8T IntroductionServiceability Improvements
No tools for access to maintenance points with 1000 hr intervals or less Grouped pressure and sampling ports Color-coded fluid level check and fill points Electric fuel priming pump Reduced hydraulic and PTO lines congestion under the operator station Improve access to area under the operator station with larger platform panels Advisor Instrumentation
On-board diagnostics in text and graphics Programmable features with menu based format
Diagnostic info on engine, powertrain, and hydraulics systems aid introubleshooting Continued progression of metric fasteners Underhood Service Light Greatly improved access for valve lash adjustment or injector R&I
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D8T Introduction Sales Model D8T S/N Prefix KPZ (EP)
J8B (CBL) Pilot Production MAY04 Full Production OCT04 Replaces D8R Series II