INTRODUCTION This presentation is about the 3500 Series Engine. One arrangement of the 3516 Vehicular Engine is used for most illustrations. The 3500 Series Engine is a diesel engine with a 4-stroke cycle. It has a 60 degree “Vee” angle between the cylinders of the block. The cylinder bore is 170 mm (6.7 inch) and the piston stroke is 190 mm (7.5 inch). Each cylinder has approximately 4310 cu. cm. (263 cu. in.). Standard engine rotation is counterclockwise. See the Service Manual for Firing under specs (V8 and V16). ORIENTATION Looking at the right side of the engine, we see the: 1. cylinder heads, block and oil pan 2. valve covers 3. rear lifting eye 4. turbocharger (one of two) 5. oil cooler and oil pump 6. fuel priming pump, two secondary fuel filters, and fuel transfer pump 7. crankcase filler opening and dipstick 8. air starting motor 9. water pump; and 10. alternator NOTE: This is the first Caterpillar engine designed to metric dimensions. All engines in the series have the same bore and stroke and have the push rod valve design. All engines are turbo charged and aftercooled. All 3500 Series Engines have direct injection combustion systems with a unit injector fuel system. On the front of the engine, we see: 1. the Caterpillar 3161 governor 2. the water pump and the line to the aftercooler 3. the thermostat housing and the bypass line 4. the vibration damper, and crankshaft pulley The fan pulley and idler pulley is driven from the crankshaft pulley belts. The fan pulley and idler pulley each have an adjustment to adjust the tension of the fan (drive) belts. The plates shown on the right can be removed to install other accessories on the auxiliary drives. The governor and crankcase breather can be installed on either the left side or right side. On the left side we see: 1. the oil supply line (arrow) 2. the oil filter base/housing and four oil filters 3. the oil supply and oil drain for the turbocharger 4. the fume disposal group Also on the rear we see three auxiliary drives above the flywheel housing. Two turbochargers are installed on this engine. This is the location of the turbochargers on the vehicle arrangements. Turbochargers can also be installed above the rear of the engine for industrial generator set and marine engines (shown later) BASIC ENGINE This is the flywheel housing and the flywheel. The standard vehicular flywheel housing is SAE No. “O”. The flywheel housing for the Marine, Industrial, and Generator Set is SAE “OO”. The SAE No. “O” is available for Marine, Industrial, and Generator Set engines. The starting motor is normally installed on the right side of the engine. An air starting motor is shown. There are two optional locations for the starting motors. . . . on the left side. The two plates cover the openings for the optional locations for the starting motors. Air or electric starting motors are also available. SERIAL NUMBER PLATE The serial number plate is on the left side of the camshaft compartment near the rear of the engine block. Also you can see the location of the camshaft compartment covers and the crankcase compartment covers. The serial number plate has the model number, serial number, arrangement number, and modification number. All numbers must be included on Service Reports with warranty claims and when ordering parts. INFORMATION PLATE This information plate is on the right side of the engine. On later engines, the plate is on the left-hand side in front of the cylinder head. This plate has the high idle rpm, full load rpm, power setting and other important engine information. Other plates and transfers (not shown) give you information about valve adjustment.