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