TM 10-4320-344-24Figure 4-3.Chocking Cylinder Head Seating Surface, Models 609-C and US636HCCD-1.i .Valve Depth Measurement, Models 609-C and US636HCCD-1.seat and measure distance from crown of valve to cylinder head(Figure 4-4).If distance exceeds specifications on eitherh . I n s e r t v a l v e inseating surfacevalve, Tables 4-4 and 4-5, seat must be replaced.Check clearance of valve stems in guides of both valves. If it exceeds valuesspecified in Tables 4-4 and 4-5, replace valve guides.4-11F i g u r e 4 - 4 .
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