Table 3-2.
Troubleshooting.
Table 3-2. Troubleshooting.
M A L F U N C T I O N
TEST OR INSPECTION
CORRECTIVE ACTION
1. F l o w L i m i t e r S h u t s O f f L i q u i d F l ow
Step 1. Pump is pumping fuel too fast for
filter-separator.
Reduce pump speed
2. D i f f e r e n t i a l P r e s s u r e I n d i c a t o r B u t t o n A c t i-
vated.
Step 1. Filter elements require changing.
Change elements (para 3-2d)
Step 2. Pump operating too fast.
Check pump, reduce speed
Step 3. Discharge line obstructed or kink.
Straighten line, clear obstruction, or
r e p l a c e h o s e.
3 . I n a d e q u a t e P e r f o r m a n ce
Step 1. Canister screen coated or clogged.
Remove canister and clean screen
with solvent and compressed air.
M A L F U N C T I O N
TEST OR INSPECTION
CORRECTIVE ACTION
Do not use metal scraper or wire
brush on teflon coated screen.
CAUTION: Prior to using compressed air
flush lines and port with fresh
water.
Step 2. Filter elements dirty
Change elements (para 3-2d).
Step 3. Pumps not operating properly.
Check pump rate flow and perform-
ance.
Step 4. Air vent line or valve clogged.
Apply compressed air to line from in-
side head.
4. Inadequate Drainage
Drain line or valve clogged.
Remove valve (para 4-10).
Section IV.
MAINTENANCE PROCEDURES
3 - 1 . G e n e r a l
The instructions in this section are published
f o r t h e i n f o r m a t i o n a n d g u i d a n c e o f t h e o p e r-
ator to maintain the filter-separator.
3-2. Filter-Separator Service
a. I f t h e d i f f e r e n t i a l p r e s s u r e i n d i c a t o r b u t-
t o n i s r a i s e d ( f i g . 2 - 1 ) t h i s i n d i c a t e s a
d e f e c t i v e f i l t e r . R e m o v e H e a d ( f i g . 3 - 2 ) . R e f er
to figure 3-1 and remove the elements.
W A R N I NG
Drain water from the sump, vent air
from unit, and wait 5 minutes before
servicing the unit.
b . I n s p e c t i o n . I n s p e c t t a n k c o v e r f o r c r a c ks
o r o t h e r d a m a g e.
I n s p e c t g a s k e t f o r t e a r s or
other damage. Inspect canister to determine if
screen has become clogged.
Pay particular at-
tention to wave spring. Inspect elements for a
d i r t y c o n d i t i o n . I n s p e c t b a n d c l a m p f o r v i s i b le
signs of damage.
c . R e p a i r .
If tank cover is cracked or dam-
aged in any way, it must be replaced. The gas-
ket is routinely replaced each time canisters are
m o v e d a n d i n s p e c t e d.
T h e c a n i s t e r s w i l l b e
c l e a n e d w i t h P D - 6 8 0 c l e a n i n g s o l v e n t i f f o u nd
t o b e d i r t y . D a m a g e d w a v e s p i n g s w i l l b e r e-
p l a c e d b y o r g a n i z a t i o n a l m a i n t e n a n c e . T h e e l e -
ments will be replaced if found to be dirty. Re-
place band clamp if damaged in any way.
d . I n s t a l l a t i o n.
I n s t a l l e l e m e n t a s s h o w n o n
figure 3-1 and tighten head bolts as shown on
figure 3-2.
3-2
