VALVES, CAMSHAFT, AND TIMING GEARS (CONT)

VALVES, CAMSHAFT, AND TIMING GEARS (CONT) - TM-5-4320-300-14_453

TM-5-4320-300-14 Pump Centrifugal Self-Priming Gasoline Engine Driven; 6-Inch 1500 GPM Capacity At 60 Foot Head Manual
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TM 5-4320-300-14 6-9. VALVES, CAMSHAFT, AND TIMING GEARS (CONT) Location/Item Action Remarks WARNING Dry cleaning solvent is flammable and potentially dangerous to people and property. Do not use near open flame, sparks, excessive heat, or on hot sur- faces. Flash point of P-D-680 solvent is 100° to 138° F (38° to 59°C). Use solvent in a well-ventilated area, and avoid inhaling fumes. If repeatedly ex- posed to fumes, seek fresh air and immediate medical help. Avoid prolonged exposure of skin to solvent. Wash exposed skin immediately and thoroughly. Compressed air used for cleaning shall not exceed 100 psi (690 kPa). Use goggles or face shield for eye protection. Do not direct airstream against skin. 35. Valve seat Clean seat inserts with P-D-680 dry insert and cleaning solvent and dry with com- counterbore pressed air. Inspect counterbores for cleaning and cleanliness, roundness, and flatness; inspection inspect for cracks and other damage. 36. Valve seat If counterbores are clean, round, flat and un- insert in- damaged, immerse the cylinder head for 30 stallation minutes in water heated to 180° to 200°F (82° to 93°C). CAUTION Damage to valve insert may result if insert is installed after the cylinder head has cooled. Install valve seat inserts immediately after removing head from water bath. Remove cylinder head from water bath and rest it bottom side up on a bench. Place an insert in the counterbore valve seat side up. This must be done quickly while cylinder head is still hot and insert is cold (room temperature). Drive insert in place until it seats solidly in the cylinder head. 6-68

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