MOUNT 2355027 - Caterpillar

Cylinder Block And Head
Illustration 1 g01123834
The cylinder block has seven main bearings. The main bearing caps are fastened to the cylinder block with two bolts per each cap.Removal of the oil pan allows access to the following components:
Crankshaft
Main bearing caps
Piston cooling jets
Oil pump
Illustration 2 g00748989
The cylinder head is separated from the cylinder block by a graphite gasket with a steel backing. Coolant flows out of the cylinder block through gasket openings and into the cylinder head. This gasket also seals the oil supply and drain passages between the cylinder block and the cylinder head. The air inlet ports are on the left side of the cylinder head, while the exhaust ports are located on the right side of the cylinder head. There are two inlet valves and two exhaust valves for each cylinder. Each set of inlet valves and each set of exhaust valves is actuated at the same time by the use of a valve bridge. The valve bridge is actuated by the pushrod. Replaceable valve guides are pressed into the cylinder head. The hydraulically actuated electronically controlled unit injector is located between the four valves. Fuel is injected directly into the cylinders at very high pressure. A pushrod valve system controls the valves. Piston, Rings And Connecting Rods
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(1) Piston (2) Piston cooling jet (3) Connecting rod High output engines with high cylinder pressures require two-piece articulated pistons. The two-piece articulated piston consists of a forged steel crown that is connected to an aluminum skirt by the piston pin. Refer to the Parts Manual in order to obtain information about the type of pistons that are used in a specific engine.
Illustration 4 g01123838
(4) Compression ring (5) Intermediate ring (6) Oil ring (7) Forged steel crown (8) Aluminum skirtAll of the rings are located above the piston pin bore. The compression ring is a Keystone ring. Keystone rings have a tapered shape. The action of the ring in the piston groove that is tapered helps prevent seizure of the rings. Seizure of the rings is caused by deposits of carbon. The intermediate ring is rectangular with a sharp lower edge. The oil ring is a standard type of ring or a conventional type of ring. Oil returns to the crankcase through holes in the oil ring groove.Oil from the piston cooling jets sprays the underside of the pistons. The spray lubricates the pistons and the spray cools the pistons. The spray also improves the piston's life and the spray also improves the ring's life.The connecting rod has a taper on the pin bore end. Two bolts hold the connecting rod cap to the connecting rod. The connecting rod can be removed through the cylinder.Crankshaft
Illustration 5 g01456633
(9) Crankshaft (10) GearThe crankshaft converts the linear motion of the pistons into rotational motion. A vibration damper is used at the front of the crankshaft to reduce torsional vibrations (twist on the crankshaft) that can cause damage to the engine.The crankshaft drives a group of gears on the front of the engine. The gear group