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We didn't mess around when we set out to develop our new line of vocational trucks. We spent hundreds of hours on the road asking customers to describe the ideal truck. Our design team rode alongside drivers and gathered input on everything from specs and comfort to visibility and performance.


Engine Model Cat® CT13 Engine Cat® CT13 Engine Less
Horse Power at 1700 rpm 365 - 475 hp (268 - 349 kW) 365 - 475 hp (268 - 349 kW) Less
Bore 4.96 in 12.6 cm Less
Engine Type Diesel, 4-Cycle Diesel, 4-Cycle Less
Configuration Inline 6-Cylinder Inline 6-Cylinder Less
Stroke 6.54 in 16.6 cm Less
Compression Ratio 17:1 17:1 Less
Displacement 758.0 in³ 12.4 l Less
Aspiration Dual Series Turbochargers, Intercooler and Aftercooler Dual Series Turbochargers, Intercooler and Aftercooler Less
Combustion System Direct Injection Direct Injection Less
Lubrication System Capacity 42.0 qt (US) 40.0 l Less
Coolant Drain Interval 600,000 miles (965,606 km) 600,000 miles (965,606 km) Less
Total Engine Weight - Dry 2400.0 lb 1089.0 kg Less
Width 37.0 in 94.0 cm Less
Length 59.0 in 150.0 cm Less
Height 49.0 in 125.0 cm Less
Valves 4 Valves Per Cylinder, Overhead Cam Actuated 4 Valves Per Cylinder, Overhead Cam Actuated Less
Peak Torque - 1000 rpm 1250 - 1700 lb-ft (1695 - 2305 Nm) 1250 - 1700 lb-ft (1695 - 2305 Nm) Less


Maximum Gross Input Power 550.0 HP 410.0 kW Less
Maximum Gross Input Torque 1700.0 lb/ft 2400.0 N·m Less
Transmission Model Cat CX31® Automatic Transmission Cat CX31® Automatic Transmission Less
Speeds 6 forward/1 reverse 6 forward/1 reverse Less
Torque Converter Cast aluminum design with lock up clutch Cast aluminum design with lock up clutch Less
Clutches Electro-hydraulic fully modulated, oil cooled, multidisc Electro-hydraulic fully modulated, oil cooled, multidisc Less
Maximum Input Speed 2500 rpm 2500 rpm Less
Length 35.3 in 896.0 mm Less
Overall Length - With Retarder Option 39.4 in 1000.0 mm Less
Overall Weight - Approximate 906.0 lb 411.0 kg Less
Overall Weight - With Retarder Option 1088.0 lb 494.0 kg 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 Less
Rear - PTO Capacity (Rotation Opposite of Engine, at 1.25 Engine Speed) 800.0 ft-lb 1356.0 N·m Less
Side - PTO Capacity (Rotation Same as Engine, Ratio Determined by PTO Adaptor) 700.0 ft-lb 950.0 N·m Less

Cab Construction

Aluminum alloy cab construction reduces overall weight for maximum payloads

Body Design

Sloped hood increases visibility and decreases wind drag for improved fuel efficiency.

Modular Design

Modular design allows for quick, cost-effective replacement of damaged components.

Control Panel

The CT660's 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.

Operator Comfort

The CT660 cab is designed for comfort and functionality with its spacious wide cab design. Ergonomic details reduce driver fatigue and interior features enhance driver and jobsite safety and productivity.

Less vibration and noise

Premium design and materials dramatically reduce vibration and cab noise.

Vocational Applications

Aggregates, Agriculture, Asphalt, Concrete, Civil Construction, Forestry, Governmental, Heavy Haul, Landscaping, Lease/Rental, Manufacturing, Mining/Quarry, Oil & Gas, Paving, Pipeline, Public Services, Recovery, Road Construction, Sanitation/Refuse, Site Construction, Transportation, Utility, Wholesale & Retail

CAT® CT13 Engine

Under the hood, the CT660 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.

CAT CX31® Automatic Transmission

Used for years in vocational applications around the world, the Cat CX31 Automatic Transmission has a proven track record for quality and reliability that helps maximize uptime. And Cat dealers know the CX31 inside and out because they've been supporting it in various on-highway applications since 2006.

CT660 Standard Equipment

  • Set-Back Axle (SBA), 116-inch and 122-inch Bumper to Back of Cab (BBC)
  • Industry Leading Turning Radius
  • Durable, heat-treated alloy steel frame rails
  • 12.0-inch rail size: 110,000 and 120,000 psi yield strength
  • Length variable in 2.0-inch increments
  • Available with rail reinforcements: one or two frame reinforcements available
  • Superior routing and clipping of all hoses and wires

  • Meritor, Dana and Fabco options available

Front Suspension
  • Multileaf, shackle type, single or two-stage spring
  • Multileaf, slipper type
  • Compatible shock absorber selection

Rear Suspension
  • Hendrickson suspension offerings: HaulMaax, HN, RT/RTE, RS, R, PriMaax
  • Chalmers high articulation

Fuel Tanks
  • Fuel tanks available in 60, 80, 100 and 120 gallon capacities
  • Single left, single right or dual fuel tanks
  • Aluminum alloy construction

CT660 Optional Equipment

  • Cat CX31 Automatic Transmission
  • Manual and UltraShift Plus Vocational transmissions built by Eaton are also available as options on the CT660