D342 INDUSTRIAL & MARINE ENGINES Caterpillar


Valves

Usage:

(1) 9M5350 Spring for valve (outer):

Length under test force ... 2.219 in.(56.36 mm)

Test force ... 65 ± 3 lb.(29.5 ± 1.4 kg)

Free length after test ... 2.574 in.(65.38 mm)

Outside diameter ... 1.713 in.(43.51 mm)

(2) 9M5349 Spring for valve (inner):

Length under test force ... 1.791 in.(45.49 mm)

Test force ... 20 ± 1 lb.(9.1 ± 0.5 kg)

Free length after test ... 2.179 in.(55.35 mm)

Outside diameter ... 1.125 in.(28.58 mm)

(3) Diameter of valve stem ... .4955 ± .0005 in.(12.586 ± 0.013 mm)

Minimum permissible diameter of valve stem ... .4935 in.(12.535 mm)

Bore in valve guide with guide installed in the head:

Exhaust valve ... .5010 ± .0010 in.(12.725 ± 0.025 mm)

Intake valve ... .4995 ± .0010 in.(12.687 ± 0.025 mm)

Maximum permissible diameter of bore in valve guide:

Exhaust valve ... .5025 in.(12.764 mm)

Intake valve ... .5025 in.(12.764 mm)

(4) Thickness of valve lip:

Exhaust valve, minimum permissible ... .094 in.(2.39 mm)

Intake valve, minimum permissible ... .141 in.(3.58 mm)

(5) Diameter of valve head:

Exhaust valve ... 2.282 ± .005 in.(57.96 ± 0.13 mm)

Intake valve ... 2.343 ± .005 in.(59.51 ± 0.13 mm)

(6) Angle of valve face ... 441/4°

(7) Depth of bore in head for valve seat insert ... .509 ± .001 in.(12.93 ± 0.03 mm)

(8) Diameter of valve seat insert ... 2.5030 ± .0005 in.(83.576 ± 0.013 mm)

Bore in head for valve seat insert ... 2.5000 ± .0005 in.(83.500 ± 0.013 mm)

(9) Angle of face of valve seat insert ... 45°

(10) Maximum permissible width of valve seat:

Exhaust valve ... .185 in.(4.70 mm)

Intake valve ... .145 in.(3.68 mm)

(11) Dimension from top of closed valve to face of head:

Maximum permissible dimension for Exhaust Valve ... .130 in.(3.30 mm)

Minimum permissible dimension for Exhaust Valve ... .076 in.(1.93 mm)

Maximum permissible dimension for Intake Valve ... .185 in.(4.70 mm)

Minimum permissible dimension for Intake Valve ... .134 in.(3.40 mm)

(12) Outside diameter of the face of the valve seat insert:

Exhaust seat ... 2.2665 in.(57.569 mm)

Maximum permissible, exhaust seat ... 2.291 in.(58.19 mm)

Intake seat ... 2.3195 in.(58.915 mm)

Maximum permissible, intake seat ... 2.343 in.(59.51 mm)

(13) Angle to grind seat face of the insert to get a reduction of maximum seat diameter ... 15°

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