TM 5-3825-229-14&P6-5. TAPPETS (cont)a. Removal.(1) Tappets (1) are positioned in the crankcase above the camshaft (2). The top of each tappet is machined toaccept a push rod. Tappets ride on intake and exhaust camshaft lobes.(2) Remove tappets (1) and identify them as to location in crankcase.b. Inspection.(1) Inspect tappet faces that contact camshaft lobes for roughness, scuffing or concave wear. Replace any worntappets. If tappets are worn, replace camshaft.(2) If the clearance between tappet and bore in crankcase exceeds 0.0022-0.0039 in. (0.055-0.100 mm), replacetappet.(3) Measure outside diameter of tappets with a micrometer. Minimum diameter of tappet should be 1.0236 to1.0242 in. (26.00-26.015 mm).(4) Measure valve tappet bore in crankcase. Valve tappet bore diameter should be 1.0263 to 1.0276 in. (26.070-26.100 mm). Tappet clearance in bore should be 0.022 to 0.039 in. (0.055-0.100 mm).6-8
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