ENGINE AR-PRIMARY 2224743 - Caterpillar

Illustration 1 g00903737
Typical example
(1) Valve springStandard free length for C1.1, C1.5, and C2.2 ... 35.0 mm (1.378 inch)Service limit for the standard free length for C1.1, C1.5, and C2.2 ... 33.5 mm (1.319 inch)Standard test force for C1.1, C1.5, and C2.2 ... 79 N (17.8 lb)Service limit for the standard test force for C1.1, C1.5, and C2.2 ... 68.6 N (15.4 lb)Length under test force for C1.1, C1.5, and C2.2 ... 30.4 mm (1.197 inch) (2) Valve guide seal for the exhaust valveIdentification ... Black garter springLabel on the black garter spring ... "EX" (3) Valve guide seal for the inlet valveIdentification ... Silver garter spring (4) Valve spring recess for the valve spring
Illustration 2 g00903744
Typical example
(5) Exhaust valve guide (A) Clearance between the exhaust valve and the valve guideC1.1 ... 0.045 to 0.072 mm (0.0020 to 0.0030 inch)C1.5 and C2.2 ... 0.050 to 0.075 mm (0.0020 to 0.0030 inch)Service limit (All models) ... 0.25 mm (0.010 inch) (6) Inlet valve guide (A) Clearance between the inlet valve and the valve guideC1.1 ... 0.025 to 0.052 mm (0.0010 to 0.0020 inch)C1.5 and C2.2 ... 0.030 to 0.060 mm (0.0012 to 0.0024 inch)Service limit (All models) ... 0.2 mm (0.008 inch) (7) Exhaust valve stemDiameter of the exhaust valve stem for C1.1, C1.5, and C2.2 ... 6.940 to 6.955 mm (0.2732 to 0.2738 inch)Service limit ... 6.84 mm (0.269 inch) (8) Inlet valve stemDiameter of the inlet valve stem for C1.1, C1.5, and C2.2 ... 6.955 to 6.970 mm (0.27382 to 0.27441 inch)Service limit ... 6.89 mm (0.271 inch)
Illustration 3 g00845823
Typical example
(B) Thickness of the valve head ... 0.925 to 1.075 mm (0.03642 to 0.04232 inch)Service limit ... 0.5 mm (0.020 inch)
Illustration 4 g00903773
Typical example
(C) Valve depth below the cylinder head faceExhaust valveC1.1 ... 0.85 to 1.15 mm (0.0335 to 0.0453 inch)Inlet valveC1.1 ... 0.65 to 0.95 mm (0.0256 to 0.0374 inch)Inlet and exhaust valvesC1.5 ... 0.65 to 0.95 mm (0.0256 to 0.0374 inch)Inlet and exhaust valvesC2.2 ... 0.65 to 0.95 mm (0.0256 to 0.0374 inch)Service limit (All models) ... 1.8 mm (0.071 inch)
Illustration 5 g00903760
Typical example
(D) Valve seat angle ... 45 degrees (E) Contact faceExhaust valveC1.1 ... 1.70 to 2.10 mm (0.0670 to 0.0830 inch)C1.5 ... 1.66 to 1.73 mm (0.0653 to 0.0681 inch)C2.2 ... 1.94 to 2.16 mm (0.0764 to 0.0850 inch)Service limit (All models) ... 2.5 mm (0.098 inch)Inlet valveC1.1 ... 1.70 to 2.10 mm (0.0670 to 0.0830 inch)C1.5 ... 1.66 to 1.87 mm (0.0653 to 0.0736 inch)C2.2 ... 1.50 to 2.00 mm (0.0591 to 0.0790 inch)Service limit (All models) ... 2.5 mm (0.098 inch)