Motor cat c9

Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved.
MCA 330C EXCAVATOR Systems Operation Media Number SENR9501-06 Publication Date 2003/03/01 Update Date 2003/03/14

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Engine Design
SMCS Code: 1000

Illustration 1

Cylinder and Valve Location (A) Exhaust valves (B) Inlet valves Bore . . . 112.0 mm (4.41 inch) Stroke . . . 149.0 mm (5.87 inch) Displacement . . . 8.8 L(537 in 3 ) Cylinder arrangement . . . In-line

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09/10/2003

Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved. Valves per cylinder . . . 4 Wet liners midsupported design Length . . . 1078 mm (42 inch) Height . . . 954 mm (38 inch) Weight . . . 661 kg (1458 lb) Type of combustion . . . Direct Injection Firing Order . . . 1 - 5 - 3 - 6 - 2 - 4 Thecrankshaft rotation is viewed from the flywheel end of the engine. Crankshaft rotation . . . counterclockwise

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Note: The front end of the engine is opposite of the flywheel end of the engine. The left side of the engine and the right side of the engine are viewed from the flywheel end of the engine. The No. 1 cylinder is the front cylinder. Copyright 1991, 2003 Caterpillar Inc. AllRights Reserved.

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Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved.
MCA 330C EXCAVATOR Systems Operation Media Number SENR9501-06 Publication Date 2003/03/01 Update Date 2003/03/14

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Basic Engine
SMCS Code: 1200

Cylinder Block And Head

Illustration 31

The cylinder block has seven main bearings. The mainbearing 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

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Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved.

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· Piston cooling jets · Oil pump

Illustration 32

The camshaft is supported bybearings that are pressed into the cylinder block. There are four camshaft bearings.

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Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved.

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Illustration 33

The cylinder head is separated from the cylinder block by a nonasbestos fiber gasket with a steel backing. Coolant flows out of the cylinder block through gasketopenings 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 exhaustvalves 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, RingsAnd Connecting Rods

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Copyright 1991, 2003 Caterpillar Inc. All Rights Reserved.

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Illustration 34

(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 toan 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.

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Illustration 35

(4) Compression ring (5) Intermediate ring (6) Oil ring (7) Forged steel crown (8)...