M978 Tanker Maintenance Instructions (Cont)
Hold V17 GRAVITY VALVE (9)
in place and remove two nuts
(10), screws (11), and coupling
Remove V17 GRAVITY VALVE
(9) and coupling gasket (13)
from pipe (14).
There are two types of handles. The
newest type of handle is shown.
Install coupling gasket (1) on pipe (2).
Position V17 GRAVITY VALVE (3) on
Do not tear or otherwise damage coupling
gaskets during installation. If coupling
gaskets are damaged, piping connections will
Do not pinch or pull coupling gaskets
off-center while installing coupling halves. If
coupling gaskets are damaged or moved out of
position, piping connections will leak.
Hold V17 GRAVITY VALVE (3) in place and position coupling gakset (1) over connection of
valve and pipe (2).