PLUNGER-RELIEF 2W8078 - Caterpillar

Engine Description
Note: When you are ordering new parts, refer to the engine identification number in order to receive the correct parts.The C1.5 marine engine and the C2.2 marine engine are controlled electronically with a mechanically actuated fuel injection pump. The engine cylinders are arranged in-line.The cylinder head assembly has one inlet valve and one exhaust valve for each cylinder. Each cylinder valve has a single valve spring. The pistons have two compression rings and an oil control ring.It is important to ensure the correct piston height so that the piston does not contact the cylinder head. The correct piston height also ensures the efficient combustion of fuel which is necessary in order to conform to requirements for emissions. End play is controlled by thrust washers that are located on the rear main bearing.The timing gears are stamped with timing marks in order to ensure the correct alignment of the gears during assembly. When the No. 1 piston is at top center compression stroke, the teeth that are stamped on the crankshaft gear and the camshaft gear will be in alignment with the idler gear.The crankshaft gear turns the idler gear which then turns the camshaft gear.The fuel injection pump and the fuel transfer pump are mounted on the cylinder block. The fuel injection pump is operated by lobes on the camshaft. The fuel transfer pump is operated by a camshaft eccentric.The fuel injection pump conforms to requirements for emissions. Adjustments to the fuel injection pump timing and high idle should only be made by trained personnel. The fuel injection pump has an electronic governor that controls the engine rpm. If the electronic governor cannot control the engine speed, a mechanical governor will control the engine speed in order to prevent damage.The engine oil pump is a gerotor type pump. The engine oil pump is located in the center of the idler gear. The engine oil pump sends lubricating oil to the main oil gallery through an oil relief valve. The oil relief valve is located on the right side of the cylinder block. The rocker arms receive pressurized oil through an externally located oil line. The oil line runs from the main oil gallery to the cylinder head.Coolant from the header tank passes through the heat exchanger. The coolant is cooled by the heat exchanger and the temperature is regulated by a water temperature regulator. After the coolant leaves the heat exchanger, the coolant goes to the water pump. From the water pump, the coolant is distributed to the engine.Lifting the Engine
Failure to follow recommended procedures for handling or transporting engines can lead to engine damage.To avoid possible engine damage, use the following procedure.
When you are lifting or moving the engine, use the following procedures in order to prevent engine damage.
Do not tilt the engine to an extreme angle unless the lubricating oil is first drained