TM 10-3930-659-20 7-13. TRANSMISSION THERMAL BYPASS VALVE MAINTENANCE (Con't). c. CLEANING AND INSPECTION WARNING Dry cleaning solvent, P-D-680, Is toxic and flammable.  Always wear protective goggles and gloves, and use only In a well-ventilated area.  Avoid contact with skin, eyes, and clothes, and DO NOT breathe vapors.  DO NOT use near open flame or excessive heat.  The solvent's flash point is 100°F-138°F (38°C-590C). If  you  become  dizzy  while  using  cleaning  solvent,  Immediately  get  fresh  air and  medical  help.  If  solvent  contacts  eyes,  immediately  wash  your  eyes  and get medical aid. 1. Clean parts with dry cleaning solvent and dry with clean rags. 2. Inspect parts for damage.  Replace damaged parts. d. ASSEMBLY 1. Install new seal (18), new valve element (16), and new spring (19) on valve body (17). 2. Install two new preformed packings (15) on end caps (11). 3. Install two end caps (11) on valve body (17) with four screws (14) and nuts (20). 4. Install two new preformed packings (21) and elbow (22) on valve body (17). 5. Install four new preformed packings (12) and two adapters (13) on end caps (11). 7-41

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