TM 10-3930-659-34 4-59.  PRIORITY VALVE REPAIR (Con’t). b.  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 1000F-1380F (380C-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 in dry cleaning solvent and allow to air dry. 2. Inspect parts for damage, burrs, and nicks. Replace damaged parts. 3. Inspect priority valve housing for cracks and other defects. Replace damaged priority valve housing. 4. Inspect  priority  valve  spool  for  damage.  Replace  priority  valve  spool  and  priority  valve  housing  if  priority  valve spool is damaged, c. ASSEMBLY 1. Secure priority valve housing (1) in machinist’s vise with vise jaw caps. 2. Install new preformed packing (3) and plug (2) on priority valve housing (1). 3. Install setscrew (4) on priority valve housing (1). 4. Install priority valve spool (5) and washer (6) on priority valve housing (1). 5. Install spring (7), new preformed packing (8), and relief valve housing (9) on priority valve housing (1). 6. Install new preformed packing (10) and relief valve cartridge (11) on relief valve housing (9). 7. Remove priority valve housing (1) from machinist’s vise. FOLLOW-ON TASKS: •    Install priority valve (see TM 10-3930-659-20). 4-223/(4-224 Blank)