The 2015 Caterpillar CT660 dump truck is a robust and versatile vehicle designed for heavy-duty hauling and dumping applications. Here are its key specifications and features based on the provided information:

Engine:
Powered by a Caterpillar CT13 six-cylinder diesel engine with a displacement of 12.4 liters.
Generates 410 horsepower (HP) to tackle demanding tasks.
Equipped with an engine brake for enhanced control and safety during descents.
Transmission:
Fitted with an automatic transmission for smooth and efficient operation.
Transmission was rebuilt in October 2022, ensuring reliability and performance.
Chassis:
Features triple axles, including a pusher axle, to support heavy loads.
Full differential lock enhances traction in challenging terrain.
Utilizes a spring-over walking beam suspension system for stability and durability.
Equipped with air brakes for reliable stopping power.
PTO:
Includes a power take-off (PTO) system for additional functionality.
GVWR and Axle Ratings:

Gross Vehicle Weight Rating (GVWR) is 66,000 lbs.
Front Axle Weight Rating (FAWR): 20,000 lbs.
Inter-Axle Weight Rating (IAWR): 23,000 lbs.
Rear Axle Weight Rating (RAWR): 23,000 lbs.
Interior:
Offers a comfortable and functional interior with air conditioning (AC) and heating for operator comfort.
Features heated mirrors, power windows, and cruise control for convenience during operation.
Dump Bed:

Equipped with a Tebco dump bed with dimensions of 16 feet 6 inches in length and 96 inches in width.
The bed is constructed of steel for durability and strength.
Includes a roll tarp for covering the load and protecting it from the elements.
Features a single ram for lifting and an air-operated end gate for efficient unloading.
Tires:
Front tires: 425/65R22.5
Rear tires: 11R22.5
Lift axle tires: 255/70R22.5
Notes:
The roll tarp is noted as broken and may require repair or replacement for proper functionality.