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Especificações 
3054C Engines for Caterpillar Built Machines
Número de Mídia -RENR2414-08 | Data de Publicação-01/10/2012 | Data de Atualização -02/10/2012 |

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i02551300 |
Cylinder Head Valves
SMCS - 1105
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Illustration 1 | g01277243 |
(1) Valve spring
Naturally aspirated engines
Length of the valve springs under test force ... 33.5 mm (1.318 inch)
Test forceof the valve springs ... 254 N (57.1 lb)
Turbocharged engines
Length of the valve springs under test force ... 34.5 mm (1.358 inch)
Test force of the valve springs ... 229 N (51.4 lb)
(2) Valvespring recess
(3) Valve guides
Inside diameter of valve guide ... 9.000 to 9.022 mm (0.3543 to 0.3552 inch)
Outside diameter of the exhaust valve guide ... 13.034 to 13.047 mm (0.5131 to 0.5137 inch)Outside diameter of the inlet valve guide ... 13.034 to 13.047 mm (0.5131 to 0.5137 inch)
Interference fit of valve guide in cylinder head ... 0.007 to 0.047 mm (0.0003 to 0.0019 inch)
Length ofValve guide ... 51.00 to 51.50 mm (2.018 to 2.027 inch)
Projection of the valve guide above the valve spring recess (2) ... 12.35 to 12.65 mm (0.486 to 0.498 inch)
Note: When new valve guides areinstalled, new valves and new valve seat inserts must be installed. The valve guides and the valve seat inserts are supplied as partially finished parts. The unfinished valve guides and unfinished valveseat inserts are installed in the cylinder head. Then, the guides and inserts are cut and reamed in one operation with special tooling. This procedure ensures the concentricity of the valve seat tothe valve guide in order to create a seal that is tight. Refer to the Disassembly and Assembly Manual for removal and installation procedures.
(4) Exhaust valve
Diameter of the exhaust valve stem...
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