4-39. 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.
Cleaning Components or Assemblies (excluding hose assemblies).
Chemical protective gloves should be worn to prevent skin irritation from detergent and hot water.
Disassemble components down to the smallest parts. Separate soft goods and clean as specified in
Clean each component by scrubbing with a non-ionic detergent solution (1/2 teaspoon 2.4 mL)
detergent to 1 gallon (3.8 L) water using a nylon bristle brush and clean cloths.
Rinse with distilled water at 125 degrees F (54 degrees C) until effluent shows no visible signs of
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.
Purge with dry, oil-free nitrogen until visually dry, or allow to air dry. The following dated and signed
records shall be maintained:
Identification of all parts cleaned.
Results of shake test.
Reassemble as outlined on assembly or component drawing.
Double bag all components in plastic and close securely.
Cleaning Hose Assemblies.
Clean hose assemblies in accordance with the following steps using the specific materials and utilizing
proper equipment. Pre-clean hose assemblies outside the clean area by rinsing externally with
Most hose assemblies will not lend themselves to disassembly. Disassemble to maximum extent
without removing fittings or clamps.
The cleaning solution shall be made by adding 1/2 ounce (14.7 mL) non-ionic detergent to each 80
gallons (302.8 L) or distilled water.
Heat the cleaning solution to 120 degrees F (49 degrees C) and circulate through the hose assembly
for 30 minutes at a flow rate of not less than 1 gallon (3.8 L) per minute.