CT6812024-01-17T17:44:02-06:00CT681CT681CaterpillarNoncurrentChasisSet-forward axle, 114-inch bumper to back of cab (BBC)12.25-inch rail size: 120,000 psi yield strengthAbove-rail radiatorAxlesMeritor & Dana options6x4 truck configurationFront SuspensionParabolic taper leaf for a smoother rideShock absorbers standardOptional two-stage, multi-leaf, shackle-type with shocksRear SuspensionHendrickson offerings: HMX, RT/RTE, RS, R & PriMaaxChalmers standard & high articulationCapacities from 40,000-85,000 lbs.Fuel Tank80-, 100- & 120-gallon capacitiesSingle left or dual under cab/back of cab optionsAluminum alloy constructionChassisIntegral Front Frame Extension (FFE)TransmissionCat CX31 Automatic TransmissionA variety of manual transmissions and the Ultrashift® Plus Vocational Transmission built by EatonOn-Board TechnologyVehicle Infotainment SystemBendix Tire Pressure Monitoring System1000030230product1000030229423Heavy-Hauling CapacityThe CT681's set-forward axle, rugged design and industrial styling make it ideal for hauling heavy loads or working in extreme conditions. Aluminum alloy cab construction reduces overall weight for maximum payloads.Attachment-Ready DesignOur integral Front Frame Extension (FFE) option makes it easy to mount attachments like snow plows, hose reels, winches and hydraulic pumps. Mixer installation is simple thanks to vertical tie-in plates mounted behind the cab.Shift-Long ProductivityComfortable drivers are safe, productive drivers. The CT681's wide, spacious cab is filled with ergonomic details to reduce fatigue and thoughtful features to enhance driver comfort, all shift long.Safer DrivingOur ergonomically designed dashboard and center stack layout give drivers complete command and control. All controls, levers, switches and gauges are positioned to maximize safety and minimize fatigue, so drivers can stay focused on the job at hand.Smooth, Quiet RideOur tuned cab air suspension system, premium grade sound insulation kit, and durable routing and clipping wire system dramatically reduce vibration and cab noise.Vocational-Specific PowerUnder the hood, the CT681 is powered by a Cat CT Series Vocational Truck Engine with ratings specific to vocational truck applications and a horsepower/torque combination to tackle the toughest jobs.Automatic ShiftingPerformance-matched with your engine to deliver rugged durability, smooth shifting and optimum power, the Cat CX31 Automatic Transmission will help you maximize your CT681's uptime, fuel economy and productivity. (Other transmission options are available.)Unmatched SupportYour CT681 comes with the best on-the-ground support team in the business. Your Cat dealer not only offers bumper-to-bumper service, but also can help you order the exact truck you need with expertise on custom options ranging from transmissions to suspensions and axles.CT681 On Highway TruckCT681 Product BrochureEngineHorse Power at 1700 rpm365 - 430 hp (268 - 316 kW)EngineEngine ModelCat® CT13 EngineEngineBore4.96in12.6cmEngineEngine TypeDiesel, 4-CycleEngineConfigurationInline 6-CylinderEngineStroke6.54in16.6cmEngineDisplacement758in³12.4lEngineCompression Ratio17:1EngineAspirationDual Series Turbochargers, Intercooler and AftercoolerEngineCombustion SystemDirect InjectionEngineLubrication System Capacity42qt (US)40lEngineCoolant Drain Interval600,000 miles (965,606 km)EngineTotal Engine Weight - Dry2400lb1089kgEngineWidth37in94cmEngineLength59in150cmEngineHeight49in125cmEngineValves4 Valves Per Cylinder, Overhead Cam ActuatedEnginePeak Torque - 1000 rpm1550 lb-ft (2102 N-m)TransmissionMaximum Gross Input Power550HP410kWTransmissionMaximum Gross Input Torque1700lb/ft2400N·mTransmissionTransmission ModelCat CX31® Automatic TransmissionTransmissionSpeeds6 forward/1 reverseTransmissionTorque ConverterCast aluminum design with lock up clutchTransmissionClutchesElectro-hydraulic fully modulated, oil cooled, multidiscTransmissionMaximum Input Speed2500 rpmTransmissionLength35.3in896mmTransmissionSide - PTO Capacity (Rotation Same as Engine, Ratio Determined by PTO Adaptor)700ft-lb950N·mTransmissionRear - PTO Capacity (Rotation Opposite of Engine, at 1.25 Engine Speed)800ft-lb1356N·mTransmissionOverall Weight - With Retarder Option1088lb494kgTransmissionOverall Length - With Retarder Option39.4in1000mmTransmissionOverall Weight - Approximate906lb411kgTransmissionPower Take-OffTwo side locations and a Cat exclusive high output rear PTOA natural extension of the Cat® product line, the Cat CT681 Vocational Truck delivers all the power, performance and productivity you expect from Caterpillar. This Class 8 set-forward axle model—ideal for hauling heavy loads—features a spacious and ergonomic cab, industrial styling, vocational-specific engine and transmission options, and bumper-to-bumper support across North America.A natural extension of the Cat® product line, the Cat CT681 Vocational Truck delivers all the power, performance and productivity you expect from Caterpillar. This Class 8 set-forward axle model—ideal for hauling heavy loads—features a spacious and ergonomic cab, industrial styling, vocational-specific engine and transmission options, and bumper-to-bumper support across North America.On Highway Truck2024-01-17T17:44:02-06:00