TM 5-3805-255-14
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VALVE RECONDITIONING CONTINUED
Refacing Valve Seats and Seat Inserts Continued
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Figure 20. Narrowing Valve Seat Width.
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Valve Springs
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1. Check for proper valve spring compression with spring tester No. PLT-100 (Figure 21).
Outside diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.289 in. (32.74 mm)
Free length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.302 to 2.382 in. (58.47 to 60.50 mm)
Test length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.350 in. (34.29 mm)
Test load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115 to 125 lb (512 to 556 Nm)
Figure 21. Checking Valve Spring Tension.
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