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SPECIAL AR 3157452 - Caterpillar



3157452 SPECIAL AR Caterpillar parts SPECIAL
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16
Alternative (cross code) number:
CA3157452
315-7452
3157452
Caterpillar 3157452 SPECIAL AR

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Illustration 1 g02542076
(1) Exhaust valve
(2) Inlet valve Note: The inlet and exhaust valve stems must be coated with clean unused engine oil prior to installation in the cylinder head.Note: The tips of the inlet and exhaust valves must be coated with 8T-2998 Lubricant. The lubricant must be applied after assembly of the retainer.
Table 1
Specification for 219-5846 Cylinder Head Gp
Item Qty Part Specification Description
1 6 147-8211 Exhaust Valve Diameter is 9.441 0.010 mm (0.3717 0.0004 inch).
Minimum diameter of a valve stem that is worn for exhaust valve stems is 9.408 mm (0.3704 inch).
Diameter of the head is 43.00 0.13 mm (1.693 0.005 inch)
2 12 145-7390 Inlet Valve Diameter is 8.000 0.008 mm (0.3150 0.0003 inch)
Minimum diameter of a valve stem that is worn for Inlet valve stems is 7.965 mm (0.3136 inch).
Diameter of the head is 40.00 0.13 mm (1.575 0.005 inch)
3 6 137-6718 Spring Length under test force is 80.27 mm (3.160 inch).
Test force is 662 33 N (149 7 lb).
Approximate free length after test is 92.08 mm (3.625 inch).
4 12 140-6188 Spring Length under test force is 60.4 mm (2.38 inch).
Test force is 302.5 18.0 N (68.0 4.0 lb).
Approximate free length after test is 67.5 mm (2.66 inch).
5 6 147-8220 Valve Guide Outside diameter is 16.000 0.008 mm (0.6299 0.0003 inch).
Bore is 9.512 0.013 mm (0.3745 0.0005 inch)
6 12 140-9670 Valve Guide Outside diameter is 13.030 0.008 mm (0.5130 0.0003 inch).
Bore is 8.072 0.013 mm (0.3178 0.0005 inch)
A - - Height to the top of the valve guides after installation:
1. Inlet valve guide is 23.0 0.5 mm (0.91 0.02 inch).
2. Exhaust valve guide is 17.8 0.5 mm (0.70 0.02 inch)
B 6 147-8218 Valve Seat Insert Outside diameter is 46.000 0.013 mm (1.81102 0.00051 inch)
Inside diameter is 39.50 0.13 mm (1.55512 0.00512 inch)
Diameter of the bore in cylinder head for the valve seat insert is 45.931 0.013 mm (1.8083 0.0005 inch)
Depth of the bore that is machined into the cylinder head for the valve seat insert is 10.00 0.05 mm (0.394 0.002 inch)
Angle of the valve seat insert is 45.50 0.25 degrees.
The valve seat insert must be shrunk by reduced temperature before the valve seat insert is installed in the head.
12 217-5213 Valve Seat Insert Outside diameter is 42.000 0.13 mm (1.65354 0.00512 inch)
Inside diameter is 35.80 0.13 mm (1.40945 0.00512 inch)
Diameter of the bore in cylinder head for the valve seat insert is 41.931 0.013 mm (1.6508 0.0005 inch)
Depth of the bore that is machined into the cylinder head for the valve seat insert is 9.00 0.05 mm (0.354 0.002 inch)
Angle of the valve seat insert is 30.25 0.25 degrees.
The valve seat insert must be shrunk by reduced temperature before the valve seat insert is installed


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