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VALVE, BREATHER ANTIDRAIN 7097059C1 - Caterpillar

7097059C1 VALVE, BREATHER ANTIDRAIN Caterpillar parts VALVE
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The cast iron cylinder head is fastened to the cylinder block by ten flanged bolts. The cylinder head gasket has a soft outer surface with an inner steel core. The inlet and exhaust ports are designed to improve air flow.The cylinder head assembly has two overhead valves for each cylinder. Each valve is held in place by a single coil spring, a cap, and two collets. The cylinder head has steel valve seat inserts for both the inlet and exhaust valves. The valves move in steel valve guides. Each valve guide is equipped with a synthetic rubber oil seal. The exhaust valve guides have a counterbore in order to prevent seizure of the valve stem that is caused by a buildup of carbon underneath the head of the valve. Both the valve seat inserts and the valve guides can be renewed.The overhead valves are operated by a rocker shaft assembly that is installed under a composite valve mechanism cover. The forged steel rocker arms are operated by cold drawn pushrods with hardened heads. The rocker shaft is supported by steel brackets that support the rocker shaft between each pair of valves. The rocker shaft assembly and valve components are lubricated by an oil flow from the hollow rocker shaft. The rocker shaft receives a reduced oil flow from the oil feed of the camshaft.Valve lash is adjusted by adjustment screws and locknuts at the pushrod end of each rocker arm.The inlet manifold and the water temperature regulator housing are integral within the cylinder head. The valve mechanism cover also contains the crankcase breather and breather pipe.Pistons
Illustration 3 g01366733
The pistons have a FASTRAM combustion chamber in the top of the piston. The piston crater ensures an efficient mix of fuel and air.The pistons have two compression rings and an oil control ring. The groove for the top ring has a hard metal insert that reduces wear of the groove. The piston skirt has a layer of graphite in order to improve the wear characteristics. The fully floating piston pin is held in an axial location by circlips. The piston pin is placed off-center in order to reduce the noise level.The piston cooling jets spray lubricating oil onto the inner surface of the piston in order to cool the piston.The piston height is adjustable. The correct piston height is important in order to ensure that the piston does not contact the cylinder head and that the fuel has efficient combustion.Connecting Rods
Illustration 4 g01366735
Connecting rod
The pistons and the connecting rods are matched to each cylinder. The piston height is controlled by the length of the connecting rods. The piston pin bearing in the connecting rod is machined off-center in order to obtain the different length grades. There are six different length grades of connecting rods that are used in order to obtain the correct piston height.
Illustration 5 g01139993
Fracture split end of the connecting rod
The connecting rod is a one-piece forging that is fractured hydraulically in order to split the big end cap from the

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