CT681
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.
- Technical Specs
- Standard Equipment
- Optional Equipment
- Engine Model
- Cat® CT13 Engine
- Horsepower @ 1700 rpm
- 365 - 430 hp (268 - 316 kW)
- Bore
- 4.96 in
- Engine Type
- Diesel, 4-Cycle
- Configuration
- Inline 6-Cylinder
- Stroke
- 6.54 in
- Compression Ratio
- 17:1
- Displacement
- 758.0 in3
- Aspiration
- Dual Series Turbochargers, Intercooler and Aftercooler
- Combustion System
- Direct Injection
- Lubrication System Capacity
- 42.0 qt
- Coolant Drain Interval
- 600,000 miles (965,606 km)
- Total Engine Weight (Dry)
- 2400.0 lb
- Width
- 37.0 in
- Length
- 59.0 in
- Height
- 49.0 in
- Valves
- 4 Valves Per Cylinder, Overhead Cam Actuated
- Peak Torque @ 1000 rpm
- 1550 lb-ft (2102 N-m)
- Maximum Gross Input Power
- 550.0 hp
- Maximum Gross Input Torque
- 1700.0 lb ft
- 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
- 35.3 in
- Overall Length with Retarder Option
- 39.4 in
- Overall Weight (approx.)
- 906.0 lb
- Overall Weight with Retarder Option
- 1088.0 lb
- Power Take-Off
- Two side locations and a Cat exclusive high output rear PTO
- Rear PTO Capacity (rotation opposite of engine, at 1.25 engine speed)
- 800.0 ft-lb
- Side PTO Capacity (rotation same as engine, ratio determined by PTO adaptor)
- 700.0 ft-lb
-
Chasis
- Set-forward axle, 114-inch bumper to back of cab (BBC)
- 12.25-inch rail size: 120,000 psi yield strength
- Above-rail radiator
-
Axles
- Meritor & Dana options
- 6x4 truck configuration
-
Front Suspension
- Parabolic taper leaf for a smoother ride
- Shock absorbers standard
- Optional two-stage, multi-leaf, shackle-type with shocks
-
Rear Suspension
- Hendrickson offerings: HMX, RT/RTE, RS, R & PriMaax
- Chalmers standard & high articulation
- Capacities from 40,000-85,000 lbs.
-
Fuel Tank
- 80-, 100- & 120-gallon capacities
- Single left or dual under cab/back of cab options
- Aluminum alloy construction
-
Chassis
- Integral Front Frame Extension (FFE)
-
Transmission
- Cat CX31 Automatic Transmission
- A variety of manual transmissions and the Ultrashift® Plus Vocational Transmission built by Eaton
-
On-Board Technology
- Vehicle Infotainment System
- Bendix Tire Pressure Monitoring System