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Desmontagem e Montagem 3306 VEHICULAR ENGINE FOR 966R WHEEL LOADER  

Crankshaft Main Bearings

SMCS - 1219-10

Remove And Install Crankshaft Main Bearings

start by:

a) remove oil pump

b) remove oil pan plate

1. Remove the No. 1, 3, 5 and 7 main bearing caps (1). Remove the crankshaft thrust bearing from the No. 7main bearing.

2. Remove the lower half of the main bearing from the main bearing caps.

Fechar o SIS

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produtos: ENGINE - MACHINEModelo: 3306 ENGINE - MACHINE 58ZConfiguração: 966R WHEEL LOADER 58Z00001-UP (MACHINE) POWERED

BY 3306 ENGINE

Número de Mídia -SENR2410-00 Data de Publicação -01/08/1981 Data de Atualização -11/10/2001

 

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3. Install tool (A) in the oil hole in the crankshaft journal and remove the upper half of the main bearing asthe crankshaft is turned and the main bearing is moved out of the cylinder block.

NOTE: Install the main bearings dry when the clearance checks are made. Put clean engine oil on the main bearings for final assembly.

4. Install new lower half of main bearings (2) in the main bearing caps. Use tool (A) and install the upperhalf of the main bearings in the cylinder block.

5. Put clean oil on the thrust bearing and install a new thrust bearing for the No. 7 main bearing. Install thethrust bearing with the identification "BLOCK SIDE" toward the cylinder block.

NOTE: When the bearing clearance is checked and the engine is in a vertical position, such as in the

vehicle, the crankshaft will have to be lifted up and held against the upper halves of the main bearings to geta correct measurement with the Plastigage. The Plastigage will not hold the weight of the crankshaft andgive a correct indication. If the engine is in a horizontal position, it is not necessary to hold the crankshaftup. Do not turn the crankshaft when the Plastigage is in position to check clearances.

6. Check the main bearing clearances with Plastigage (B) as follows:

a) Put a piece of Plastigage (B) on the surface of the lower half of the main bearing.

NOTICE

If the crankshaft is turned in the wrong direction, the tab on bearingwill be pushed between the crankshaft and bearing area in block whichcan cause damage to the block or crankshaft.

NOTICE

Make sure the upper and lower halves of the main bearings areinstalled so the bearing tabs fit into the notch in cylinder block and themain bearing caps.

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TYPICAL EXAMPLE 

9. Check the crankshaft end play with tooling (C). The end play is controlled by the thrust bearings on the No. 7 main bearing. End play with new bearings is .0025 to .0145 in. (0.064 to 0.368 mm). The maximum permissible end play with used bearings is .025 in. (0.64 mm).

end by:

a) install oil pan plate

b) install oil pump

Direitos Autorais 1993 - 2009 Caterpillar Inc.Todos os Direitos Reservados.Rede Particular Para Licenciados SIS.

Thu Jan 29 16:13:22 UTC-0300 2009

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