BRAKE SYSTEMS
• Engine Type: Diesel, 4-cycle
• Configuration: Inline 6-cylinder
• Displacement: 12.4 L (758 cu. in.)
• Bore and Stroke: 4.96 inches & 6.54 inches (12.6 cm & 16.6 cm)
• Compression Ratio: 17:1
• Aspiration: Dual series turbochargers, intercooler & aftercooler
• Combustion System: Direct injection
• Lubrication System Capacity: 42 quarts (40 L)
• Coolant Drain Interval: 600,000 miles (965,606 km)
• Total Engine Weight (Dry): 2400 lbs. (1089 kg)
• Dimensions: L 59 inches x W 37 inches x H 49 inches (L 150 cm x W 94 cm x H 125 cm)
• Valves: 4 valves per cylinder, overhead cam actuated
• Horsepower: 365-430 hp (268-316 kW) @ 1700 rpm
• Peak Torque: 1250-1550 lb-ft (1695-2102 Nm) @ 1000 rpm
CAT CT13 ENGINE SPECIFICATIONS
BRAKE SYSTEMS
Horsepower
(bhp @ 1700 rpm)
Torque Peak
(lb-ft @ 1000 rpm)
Gov. Speed
(rpm)
Fully Developed Torque
(lb-ft @ 800 rpm)
365 1250 2100 686
370 1350 2100 770
390 1450 2100 811
410 1450 2100 828
430 1550 2100 868
CAT CT13 ENGINE PERFORMANCE DATA
» DRIVE ENGINE POWER to your attachments
with our Front Engine Power Take-Off (FEPTO).
» REDUCE GEAR SHIFTING with our advanced
air management system, which allows for fewer
downshifts up steep grades.
» ACHIEVE PRECISE INJECTION TIMING and optimal
combustion with our high-pressure, common-rail fuel
system that features ideal injection pressures.
» GET BROAD PEAK TORQUE characteristics
with our dual sequential turbochargers
and high-pressure injection system.
» EASILY ACCESS KEY SYSTEMS and components
from valve cover to oil filter to fuel filter.
UNDER THE HOOD, your CT681 is powered by a Cat CT Series Vocational Truck Engine with ratings
from 365–430 bhp and 1,250–1,550 lb-ft of peak torque. Designed specifically for vocational applications,
it features an ideal match of power and performance to tackle the toughest jobs.
» MEET EMISSIONS STANDARDS with our highly
efficient Selective Catalytic Reduction (SCR) solution,
featuring upgraded in-cylinder technology and proven
aftertreatment system.
» REDUCE DIAGNOSTIC AND MAINTENANCE TIME
with our single Electronic Control Module (ECM)
and fewer electrical connections.
» SAVE WEIGHT up to 200 pounds compared to standard
iron—with our compacted graphite iron block.
» FLUID FREE HEAD GASKET with no risk of coolant
leaking into engine oil or exhaust gases into cooling
system—reliability.
