TM 10-4630-207-13&P
0019 00
6. Rinse with fresh water and clear assembly of obstructions that may prevent their proper functioning.
Inspect the primary shutoff mechanism, particularly the float ball (figure 3, item 1), ball cage lid mount
(figure 3, item 2), and seat (figure 3, item 3).
2
3
1
Figure 3. Primary Shutoff Mechanism
7. Replace a defective float ball, basket, or seat, if necessary, as described under REPLACE in this WP.
8. Re-install primary shutoff portal lid and isolation valve assembly as described under REPLACE in this
WP.
REPLACE
Replace the following parts as required:
1. Primary shutoff portal lid gasket.
a. Remove the primary shutoff portal lid and isolation valve assembly (figure 4, item 1) from the tank
as described under SERVICE in this WP.
WARNING
To prevent injuries from pinching, be careful when removing gasket with
needle nose pliers. Keep hands away from hatch lip.
b. Replace a hatch gasket (figure 4, item 2) by prying it from the portal lid (figure 4, item 3) using
long round nose pliers.
Remove remnants of the unserviceable gasket from the groove (figure 4, item 4) and clean
c.
groove before installing a new gasket.
d. Cut a 36-inch length of gasket and install in groove.
0019 00-3
