TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
Page 452 of 1176
TM 9-2320-361-24-1 0034 00 0034 00-2 VALVE TAPPETS MAINTENANCE (Contd) REMOVAL WARNING Skysol 100 solvent is combustible; DO NOT use or store near heat, sparks, flame, or other ignition sources. Use mechanical ventilation whenever product is used in a confined space, heated above ambient temperatures, or agitated. Keep container sealed when not in use. Contact with Skysol 100 may cause skin irritation. Use chemical- resistant gloves. In case of skin contact, remove any contaminated clothing and wash skin thoroughly with soap and water.Wash contaminated clothing before reuse. Eye contact may cause irritation, tearing, or blurring of vision. Use face shield or goggles when eye contact may occur. In case of eye contact, flush eyes with large amounts of water for at least 15 minutes or until irritation subsides. Inhalation may cause irritation to upper respiratory passages. DO NOT have food or drink in the vicinity. Failure to comply may result in injury to personnel. CAUTION Camshaft and tappets are a matched set. All tappets removed must be tagged for installation. Failure to do this may result in damage to tappets or camshaft. NOTE Sludge from engine oil may build upon external surfaces of tappets. When this condition exists, Skysol 100 solvent maybe applied to tappets while working tappets up and down to loosen sludge and aid removal. Remove and tag twelve tappets (2) from tappet bores (1) in engine block (3). CLEANING AND INSPECTION 1. For general cleaning instructions, refer to WP 0021 00. NOTE Normal tappet and camshaft lobe wear is indicated by a slight inward coning or dishing effect of the cam contact surface on tappets. 2. Inspect tappets (2) for coned, scored, or grooved cam contact. Minor surface coning is acceptable when cam contact surface is free of grooving and scoring, otherwise replace. 3. Inspect machined sides of twelve tappets (2) for grooving or scoring. Replace if defective. 4. If tappets (2) need replacement, inspect twelve tappet bores (1) and lobe surfaces of camshaft. Refer to TM 9-2815-210-34-2-2 for inspection. INSTALLATION CAUTION Tappets exterior must be coated with new engine oil prior to installation. This provides for initial lubrication when engine is started. Failure to oil tappets may result in damage to tappet bores, tappets, or camshaft lobes. 1. Coat twelve tappets (2) with new engine oil. 2. Install and seat twelve tappets (2) in tappet bores (1) of engine block (3). 3. Install rocker arms and pushrods (WP 0031 00). 4. Install tappet chamber cover (WP 0033 00).