TM 5-5420-226-20-2
FUEL-WATER SEPARATOR OPERATIONAL TESTS (Sheet 5 of 11)
Automatic Drain Test (Sheet 2 of 2)
7. Using crescent wrench, remove pipe plug
from upper sensor hole (L).
CAUTION
Be very careful not to disturb center filter element.
The center filter element must be replaced if disturbed
in any way.
8. Using 7/16 inch wrench, remove eight screws,
lockwashers, and flat washers (M) securing
cover to separator (P). Remove cover (N) from
separator (P).
9. Add fuel to fuel-water separator (P)
until fluid level is above upper sensor
hole (L).
10.
Using adjustable wrench, install pipe plug
into upper sensor hole (L).
Place cover (N) in position and, using
11.
7/16 inch wrench, install eight screws,
lockwashers, and flat washers (M).
12.
Hold tips of upper (G) and lower (H)
sensor probes in water in metal con-
tainer (A).
NOTE
Remove both upper (G) and lower (H) sensor probes
from water in metal container (A) as soon as fluid
begins draining from drain tube (B).
13. Listen for solenoid drain valve (Q)
to click and watch for fluid to begin
draining from solenoid drain valve
drain tube (B).
14. If fluid does not begin draining,
refer to troubleshooting procedures.
15. If fluid does begin draining, go on to
15-second drain test on next page.
TA107841
Go on to Sheet 6
7-234