M978 Tanker Maintenance Instructions (Cont)
On some tanks, there is no pipe
extending from the return port. On
these tanks, install seal into end
Some tanks have pipes permanently
welded. On some tanks the pipe is
Apply grease to seal (1) and install over
return port (2).
Position drop tube (3) inside tank (4) so
hook bracket (5) is around brace (6).
Do not overtighten end fitting or seal
damage will result.
Turn end-fitting (7), first by hand, then
using a pipe wrench until seal (1) is
squeezed out between return port (2)
and end-fitting (7).
Apply thread locking compound to set
screw threads (8) and tighten.
When the drop tube seal is properly installed, fuel should not spray from the seal
area when evacuating hoses. This can be observed by opening the manhole and watching for spraying
fuel during hose evacuation.
Follow-on Maintenance. Install tank filler lid (para 16-49).
END OF TASK