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.
Horse Power at 1700 rpm | 365 - 430 hp (268 - 316 kW) |
Engine Model | Cat® CT13 Engine |
Maximum Gross Input Power | — |
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.
Horse Power at 1700 rpm | 365 - 430 hp (268 - 316 kW) |
Engine Model | Cat® CT13 Engine |
Bore | — |
Engine Type | Diesel, 4-Cycle |
Configuration | Inline 6-Cylinder |
Stroke | — |
Displacement | — |
Compression Ratio | 17:1 |
Aspiration | Dual Series Turbochargers, Intercooler and Aftercooler |
Combustion System | Direct Injection |
Lubrication System Capacity | — |
Coolant Drain Interval | 600,000 miles (965,606 km) |
Total Engine Weight - Dry | — |
Width | — |
Length | — |
Height | — |
Valves | 4 Valves Per Cylinder, Overhead Cam Actuated |
Peak Torque - 1000 rpm | 1550 lb-ft (2102 N-m) |
Maximum Gross Input Power | — |
Maximum Gross Input Torque | — |
Transmission Model | Cat CX31® Automatic Transmission |
Speeds | 6 forward/1 reverse |
Torque Converter | Cast aluminum design with lock up clutch |
Clutches | Electro-hydraulic fully modulated, oil cooled, multidisc |
Maximum Input Speed | 2500 rpm |
Length | — |
Side - PTO Capacity (Rotation Same as Engine, Ratio Determined by PTO Adaptor) | — |
Rear - PTO Capacity (Rotation Opposite of Engine, at 1.25 Engine Speed) | — |
Overall Weight - With Retarder Option | — |
Overall Length - With Retarder Option | — |
Overall Weight - Approximate | — |
Power Take-Off | Two side locations and a Cat exclusive high output rear PTO |
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.
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