SHAFT ASSEM. 7K7614 - Caterpillar

The 3500 series engine and the 3500B series engine with EUI option are electronically controlled engines. The engines have electronic fuel injectors. The engines are equipped with either jacket water aftercooling (JWAC) or separate circuit aftercooling (SCAC). The following engine models are available: 8 cylinder, 12 cylinder and 16 cylinder.Engine efficiency and engine performance depend on adherence to proper operation and maintenance recommendations. Follow the recommended Maintenance Schedule and use the recommended lubrication oils, fuels, and coolants.Engine Specifications
Table 1
3500 Engine Specifications
Item 3508 Engine 3512 Engine 3516 Engine
Rated speed (rpm) 1000 to 1800
Cylinders and arrangement 60 degree Vee 8 60 degree Vee 12 60 degree Vee 16
Bore 170 mm (6.7 inch)
Stroke 190 mm (7.5 inch)
Type 4 stroke cycle
Compression ratio 13.5:1 (3500 Engines with EUI Option)
14:1 (3500B Engines)
Aspiration Turbocharged
Method of cooling the turbocharged air Separate circuit aftercooling (option)
Jacket water aftercooling
Displacement per cylinder 4.3 L (263 in3)
Total displacement 34.5 L (2105 in3) 51.8 L (3158 in3) 69.1 L (4210 in3)
Rotation (flywheel end) Counterclockwise rotation is standard.
Clockwise rotation is optional.
Fuel See this Operation and Maintenance Manual, "Refill Capacities and Recommendations" (Maintenance Section).
Method of fuel injection Electronic fuel injectors
Method of starting Air starting motor
Electric starting motor
Exhaust back pressure (design) 2.5 kPa (10 inches of H20)
Maximum allowable back pressure 5 kPa (20 inch of H2O)
Maximum inlet air Restriction 6.2 kPa (25 inches of H2O)
Illustration 1 g00308097
3508 Engine
(A) Inlet valves
(B) Exhaust valves
(C) Flywheel
Illustration 2 g00308167
3512 Engine
(A) Inlet valves
(B) Exhaust valves
(C) Flywheel
Illustration 3 g00308357
3516 Engine
(A) Inlet valves
(B) Exhaust valves
(C) Flywheel