rightwinger

A few weeks ago I had changed out my lift pump, and every since then I cannot get the banjo fitting on the back side of the fuel bowl to stop leaking. I am afraid to crank on it anymore for fear I'll break something. Do you have to replace these washers everytime you remove a banjo fitting? Someone please help me out, this is very frusterating and painting my garage floor in diesel every night is starting to make the wife cranky....ha ha.

Dieselbuilder

Yes and no but if it leaks change the gasket it does no take a lot to tighten it

gorms

Sometimes it works to back the bolt off, then tight again a few times to help seat the washers.

hhrumph

Standard aircraft practice is to replace the washers (o-ring) EVERYTIME the nut or bolt is removed. The reason is just as you mentioned. With a new washer, just snug the torque up until it bottoms out then no more then 1/4 to 1/2 turn more. What happens is you end up warping the sealing surface and the o-ring can not compsenate for the change. They are not that expensive to replace. I had a "old aircraft mechanic" ask me one time, how is it that we never have time to do it right the first time, but we always have time to do it over again ?
Just my $.02
Good Luck.

KATOOM

Torque for those banjo fittings is 18 lbs. Some washers are all copper and some have a rubber center. If the leak then do as advised or replace the washers. You made sure you have one on "each side" of the banjo, right.....?