TM  10-3930-638-24&P 4-4. TRANSMISSION MAINTENANCE (cont) k. Modulation Valve Assembly (cont). STEP LOCATION ITEM ACTION REMARKS DISASSEMBLY 1  Modulation a. Four piston seals (1) valve body (8) b. Four O-rings (2) c. Two accumulator valves (3) d. Two outer accumu- lator  springs  (4) e. Two inner accumu- lator  springs  (5) f. Two regulator springs  (6) g. Two regulator spools  (7) Remove Remove  and discard Remove Remove Remove Remove Remove CLEANING WARNING Dry cleaning solvent (P-D-680), used to clean parts is toxic and flammable. Wear protective goggles and gloves and use only in a well ventilated area. Avoid contact with skin, eyes, and clothes and don’t breathe vapors. Do not use near open flame or exces- sive heat and don’t smoke when using it. Failure to do so could cause serious injury. If you become dizzy while using cleaning solvent, get fresh air immediately, and get medical attention. If contact with skin or clothes is made, flush with large amounts of water. If contact with eyes is made, wash eyes with water immedi- ately,  and  obtain  medical  aid  immediately. WARNING Wear safety glasses when drying parts with compressed air. Fail- ure to do so could cause serious injury to eyes and possible blind- ness. If you hurt your eyes or if a foreign object is blown into your eyes, seek medical attention immediately. 2 AH  parts Clean Use  cleaning  solvent  P-D-680.  Immerse parts in cleaning solvent and move slowly up  and  down  until  parts  are  thoroughly cleaned. Dry parts thoroughly using com- pressed air or clean cloths INSPECTION 3 Modulation  valve Inspect Replace if worn, damaged or distorted, or body  (8) if spool bores cracked or worn 4-235