Frequency of filter replacement is
determined by the contamination
level of your fuel. Replace filter
every 500 hours, every other oil
change, when vacuum gauge
(optional) reads between 7 to
10 inches of mercury (inHg), if
power loss is noticed, or annually,
whichever occurs first.
Note—always carry extra
replacement filters as one tankful
of excessively dirty fuel can plug
a filter.
Use only genuine Racor Aquabloc
®
replacement filters—see
Part List
.
All Applications
1. Isolate the filter assembly with
bypass or shut-off valves, if
applicable.
2. Remove T-handle and lid.
3. Remove filters by holding bail
handles and slowly pulling
upward with a twisting motion.
Dispose properly according to
local regulations.
4. Remove and discard old lid
gasket and T-handle O-ring and
clean seal glands of any dirt or
debris. Lubricate new gasket
and seal (supplied with new
filter) with motor oil or diesel
fuel before installation.
5. Refer to Priming Instructions,
otherwise, fill unit with clean
fuel, replace lid and T-handle
and tighten snuggly by hand
only—
do not use tools.
6. Open any closed valves; if
applicable.
Note—above ground tanks or
transfer pump applications may
use head pressure to prime filter
assembly.
Filter Replacement
Troubleshooting
Replace filter every 500 hours, every
other oil change, annually, or at first
indication of power loss, whichever
occurs first. For Construction and
Agricultural use, change filter every
300 hours.
Do not over tighten self-tapping
capscrews to avoid stripping out
body threads. After disassembly, start
threads by hand prior to using tools.
Tighten to 55-65 in. lbs.
The hollow aluminum checkball floats
up against the seal when fuel is
stopped, preventing fuel bleed-back.
If unit looses prime, inspect upstream
hose connections first, disassemble
unit to inspect seal and ball. (It’s normal
to hear a "rattling" sound at any time).
Air bubbles or fuel leakage appearing
from drain may indicate drain is not
closed completely or seal has been
clogged with contaminants. Tighten or
disassemble and inspect. Tighten to
30-35 in. lbs.
If filter is changed or assembly drained
for any reason, reprime assembly. Fill to
just above top of filter before replacing
lid. It is normal for the fuel level to drop
during use. This is especially apparent
at filter element change-out.
Hand tighten only! Do not use tools for
leverage. Tighten 70 to 90 in. lbs.
SAE O-ring ports should have a smooth
angled seat for sealing. Do not scratch
this surface. Check O-ring for damage.
Damaged, worn, or dirty seals will allow air ingestion. Inspect and replace all seals as
needed. Clean the sealing surfaces of dirt or debris every time the filter is replaced.
Optional heater port—not used on
marine models. O-ring must not be
damaged or swollen. Tighten to 15-20
in. lbs.
Air bubbles appearing from turbine
are an indication of an upstream leak
between Racor inlet and fuel tank pick-
up tube.
A plug is installed if the water sensor
option is not selected. Tighten to 15-20
in. lbs.
The water sensor, if equipped, is used
in conjunction with a water detection
amplifier and should activate when
water contacts the tips. Air bubbles
or fuel leakage appearing from sensor
may indicate it is loose or O-ring is
damaged. Tighten to 15-20 in. lbs.
Drain water (if present) before it
gets to this level. At some time, the
contaminant collection bowl may
become dirty on the inside. Remove the
four bowl ring capscrews and drop the
bowl. Clean the inside with hot soapy
water, dry off and re-install. Ensure
bowl gasket is cleaned, and lubricate
with silicone grease prior to reuse.
Replace T-handle o-ring and lid gasket
with each filter element replacement.
