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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.
|Engine Model||Cat® CT13 Engine Cat® CT13 Engine||More Less|
|Horsepower @ 1700 rpm||365 - 430 hp (268 - 316 kW) 365 - 430 hp (268 - 316 kW)||More Less|
|Bore||4.96 in 12.6 cm||More Less|
|Engine Type||Diesel, 4-Cycle Diesel, 4-Cycle||More Less|
|Configuration||Inline 6-Cylinder Inline 6-Cylinder||More Less|
|Stroke||6.54 in 16.6 cm||More Less|
|Compression Ratio||17:1 17:1||More Less|
|Displacement||758.0 in3 12.4 L||More Less|
|Aspiration||Dual Series Turbochargers, Intercooler and Aftercooler Dual Series Turbochargers, Intercooler and Aftercooler||More Less|
|Combustion System||Direct Injection Direct Injection||More Less|
|Lubrication System Capacity||42.0 qt 40.0 l||More Less|
|Coolant Drain Interval||600,000 miles (965,606 km) 600,000 miles (965,606 km)||More Less|
|Total Engine Weight (Dry)||2400.0 lb 1089.0 kg||More Less|
|Width||37.0 in 94.0 cm||More Less|
|Length||59.0 in 150.0 cm||More Less|
|Height||49.0 in 125.0 cm||More Less|
|Valves||4 Valves Per Cylinder, Overhead Cam Actuated 4 Valves Per Cylinder, Overhead Cam Actuated||More Less|
|Peak Torque @ 1000 rpm||1550 lb-ft (2102 N-m) 1550 lb-ft (2102 N-m)||More Less|
|Maximum Gross Input Power||550.0 hp 410.0 kW||More Less|
|Maximum Gross Input Torque||1700.0 lb ft 2400.0 N·m||More Less|
|Transmission Model||Cat CX31® Automatic Transmission Cat CX31® Automatic Transmission||More Less|
|Speeds||6 forward/1 reverse 6 forward/1 reverse||More Less|
|Torque Converter:||Cast aluminum design with lock up clutch Cast aluminum design with lock up clutch||More Less|
|Clutches:||Electro-hydraulic fully modulated, oil cooled, multidisc Electro-hydraulic fully modulated, oil cooled, multidisc||More Less|
|Maximum Input Speed:||2500 rpm 2500 rpm||More Less|
|Length||35.3 in 896.0 mm||More Less|
|Overall Length with Retarder Option||39.4 in 1000.0 mm||More Less|
|Overall Weight (approx.)||906.0 lb 411.0 kg||More Less|
|Overall Weight with Retarder Option||1088.0 lb 494.0 kg||More Less|
|Power Take-Off||Two side locations and a Cat exclusive high output rear PTO Two side locations and a Cat exclusive high output rear PTO||More Less|
|Rear PTO Capacity (rotation opposite of engine, at 1.25 engine speed)||800.0 ft-lb 1356.0 N·m||More Less|
|Side PTO Capacity (rotation same as engine, ratio determined by PTO adaptor)||700.0 ft-lb 950.0 N·m||More Less|
The 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.
Our 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.
Comfortable 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.
Our 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.
Our tuned cab air suspension system, premium grade sound insulation kit, and durable routing and clipping wire system dramatically reduce vibration and cab noise.
Under 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.
Performance-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.)
Your 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.