TM 5-4220-233-14
b. Installation or Reinstallation .
(1) The new component or cleaned pipe shall be wrapped or double bagged. If not, the item
shall be returned for cleaning.
(2) The component or piping shall be removed from bagging and shall be inspected for damage
at the mating surfaces, threads, or connecting surfaces and any primary surface. Inspect for
dust or minor particle contamination, and remove with lint-free rag (Item 4, Appendix D).
(3) Mating components and pipe shall have protection materials or plugs removed.
(4) Mating surfaces, O-rings and threads shall be coated lightly with an approved lubricant.
Threaded surfaces must be coated to prevent galling of threads at assembly.
(5) A pressure test shall be performed to verify that there are no leaks and that the correct
fittings have been installed in the system.
4-69. PRE-CLEANING OF COMPONENTS OR PIPING .
Upon receipt of new component not cleaned or components and pipe removed from the system for cleaning,
the item shall be pre-cleaned. Doing this shall prepare the component for final cleaning. Pre-cleaning will be
accomplished in an area separate from the clean area. The pre-cleaning will include but is not limited to the
following:
a. All wrapping shall be removed.
b. Loose paint, rust, brackets, panels, tags, supports and other such items shall be removed.
c. If hydrocarbons and /or other contaminants are known to have been introduced into the component or
piping, a thorough degreasing procedure shall be initiated Trisodium phosphate (TSP) (Item 17,
Appendix D) or non-ionic detergent (NID) (Item 8, Appendix D) may be used.
d. Visually inspect the pre-cleaned articles under bright light to ensure that all gross contamination has
been removed.
e. Bag all components and ends of pipe with plastic to await cleaning.
4-70. CLEANING METHOD - NON-IONIC DETERGENT .
This method outlines the cleaning procedures for oil-free cleaning of metallic/nonmetallic components or
assemblies using non-ionic detergent. This procedure is only to be used if there is no equipment available to
conduct the TSP cleaning method.
a. Cleaning Components or Assemblies (excluding hose assemblies).
CAUTION
Chemical protective gloves should be worn to prevent skin irritation from detergent
and hot water.
(1) Disassemble components down to the smallest parts. Separate soft goods and clean as
specified in paragraph 4-65.
(2) Clean each component by scrubbing with a non-ionic detergent (Item 8, Appendix D) solution
(1/2 teaspoon 2 4 mL) detergent to 1 gallon (3 8 L) water using a nylon bristle brush (Item 3,
Appendix D) and clean cloths (Item 4, Appendix D) .
(3) Rinse with distilled water at 125 degrees F (54 degrees C) until effluent shows no visible
signs of detergent.
(4) Collect some of the water rinsed over the items in a flask that can be fitted with a rubber
stopper. Shake the flask for a few seconds and If any bubbles form and remain on the
surface of the water in the flask, continue to rinse item until no bubbles form and remain in
the sample flask.
(5) Purge with dry, oil-free nitrogen until visually dry, or allow to air dry. The following dated and
signed records shall be maintained:
(a) Identification of all parts cleaned.
(b) Results of shake test.
(6) Reassemble as outlined in specific component maintenance procedures (Chapter 4 or
Chapter 5).
(7) Double bag all components in plastic (Item 2, Appendix D) and close securely.
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