inspection, repair and replacement, and assembly instructions for the third stage trap assembly. a. Disassembly.  Disassemble the third stage trap assembly only to the extent necessary to repair or replace a defective part or parts. (1) Remove tubing elbow (1), tubing elbow (2), tubing adaptor (3) and bleed valve assembly (4) from strainer (9). NOTE Refer to BLEED VALVE SUBASSEMBLY (Section VI) for bleed valve repair instructions. (2) Remove reducing nipple (5) and line strainer (6) from trap body (12). (3) To disassemble strainer assembly (6), remove plug and screen assembly (7) and o-ring packing (8) from strainer body (9). (4) Unscrew and remove trap filter assembly (10) and o-ring packing (11) from trap body (12). b. Cleaning.  Refer to paragraph 6-3.a for general cleaning instructions. Take care not to damage the fine mesh filter screen. NOTE Do not allow parts to remain in dry cleaning solvent for extended periods of time or rust spots may form. (1) Thoroughly wash filter screen in solvent, per Federal Specification P-D-680, Type II1.  Allow filters to air dry. NOTE For best results.  use ultrasonic cleaner, USN 4940-00-164-8977.  (Table 2-1).  to clean the ,trainer filter screen. (2) Wipe out cavity of trap bodies with a line- free cloth dampened in solvent, per Federal Specification 1P-I)60O.  Type II. Allow bodies to air dry. c. Inspection.  Refer to paragraph 6-3.b for general inspection instructions. (1) Check the filter screen for damage such as breaks and plugging due to corrosion. (2) Check o-ring for deterioration, cuts, or other damage. d. Repair or Replacement.  Refer to paragraph 6- 3.c for general repair or replacement instructions. Do not allow solder to foul filter screw threads. (1) If screen is undamaged  and screen-to- screw solder joint is broken, use a gas torch to silver solder screen to screw.  Use rosin residue remover to remove solder flux residue oil, and grease from trap filter. (2) If filter screen is damaged, replace the trap filter subassembly. (3) Replace  all  threaded  parts  having  worn, stripped, or damaged threads. (4) Replace damaged or defective fittings. (5) Replace a damaged or defective strainer. (6) Replace a damaged or defective continuous bleed valve. (7) Replace all parts that are worn or damaged to an extent that will impair their normal function. e. Assembly.  To assemble the third stage trap assembly, proceed as follows: (1) Assemble o-ring (11) and trap filter assembly 4(10) in top of trap body (12). Assemble o-ring (8) and the plug and screen assembly (7) into strainer body (9). (2) Install the reducer nipples (5) in strainer body (9). (3) Assemble the continuous bleed valve assembly (4) on reducing nipple (5) and install tubing adaptor (3) in bleed valve outlet. 6-33