Fittings Leaking

TM 5-3835-222-BD

enough to fit. Torn or cut O-rings can be replaced using a larger O-ring and cutting it to length. If

an adhesive is available, glue the cut ends together. O-rings with small cuts can be coated with a

silicone gasket sealer to seal the leakage caused by the cut, if it is not sealing against overtightening.

Leaking fittings should first be tightened to attempt an easy repair.

5-13. Fittings Leaking. Flared fuel fittings will start to leak because of engine vibrations or

overtightening. Leaking fittings should first be tightened to attempt stopping the leak If tightening

does not stop the leak, string can be used to push the flared tubing more firmly against the

connecting surface. Coating the string with a gasket sealing compound will aid in stopping leaks

in a low pressure fuel line.

Personnel/Time Required:

1 soldier - 30 minutes - 1.0 hr.

Materials/Tools:

Sealant, Fuel Resistant

String (appendix C, section II, item 39) Or Cord, Light Tie (appendix C, section II, item 10)

Procedural Steps:

a. Remove coupling flange nut.

b. Slide coupling flange nut up, away from flared end.

c. Clean grease, oil and fuel from flared end.

d. Wrap string around flared end of line.

e. Coat string liberally with fuel resistant sealant.

f. Reinstall line and tighten nut securely.

g. Check for leaks. If still leaking, repeat procedure using more string.

Record the BDAR action taken. When the mission is completed, as soon as practicable, repair

the equipment using standard maintenance procedures.

5-8