TM 5-4610-218-12
Section XIII. MAINTENANCE OF THE INFLUENT LAUNDER,
REFLUENT LAUNDER CONNECTING TUBE, ADJUST SUPPORT
RODS AND SLUDGE CONCENTRATOR VALVE
(3) Replace any unserviceable parts.
WARNING
Dry cleaning solvent, P-D-680, used to
the connecting tube.
clean parts, is potentially dangerous.
Avoid repeated and prolonged
4-55. Effluent Launder Adjustable Support
breathing of the vapors and skin con-
Rods.
tact with the liquid. Do not use near
a. General. The three adjustable support rods
open flame or excessive heat. Use in a
are used to support and adjust the effluent launder.
well-ventilated area. The flash-point
The effluent launder must be supported in some
of P-D-680 is 100-138 F (38-59 C).
manner before removing the rods.
4-53. Influent Launder.
adjustable support rods.
a. General. The influent launder is of one-piece
c. Clean, Inspect and Repair.
construction and is attached to the bridge rail as-
(1) Clean all parts with dry cleaning solvent
sembly. The raw water is introduced into the influ-
P-D-680.
ent launder, through the aspirators, from where is
overflows into the downcomer tube, or mixing zone.
(2) Inspect the rods for cracks, breaks, and
damaged threads.
b. Removal. Remove the aspirator manifold as-
sembly and influent launders as illustrated in fig-
(3) Replace any damaged or defective parts.
ure 4-55.
c. Clean, Inspect and Replace.
the adjustable support rods.
(1) Clean the launders with dry cleaning sol-
vent P-D-680.
4-56. Sludge Concentrator Valves and Piping.
(2) Inspect for cracks, breaks, and distortion.
a. General. The sludge concentrator valves and
piping are mounted in the sludge concentrator tank.
(3) Replace a damaged influent launder.
They are used to fill the sludge concentrator tank
d. Installation. Install the influent launders
and allow clear water to flow through the adjust-
and the aspirator manifold assembly as shown in
able orifice to the wet well tank.
sludge concentrator valves and piping.
4-64. Connecting Tube Between Effluent Laun-
der and Wet Well.
semble the sludge concentrator valves and piping.
a. General. The effluent launder and wet well
d. Clean, Inspect and Repair.
are connected by a plastic tube. Clear water col-
lected by the effluent launder flow through the tube
(1) Clean all parts with dry cleaning solvent
to the wet well.
P-D-680.
(2) Inspect the pins and pin holes in the rods
connecting tube.
and handwheels for wear.
c. Clean, Inspect and Replace.
(3) Inspect the orifice plug for cracks and pit-
ted seating surfaces.
(1) Clean the plastic tube with dry cleaning
solvent P-D-680 or soap and water.
(4) Inspect the block for cracks and worn or
pitted orifice plug seating surfaces.
(2) Inspect the tube for cracks and deterio-
ration and the clamps for cracks and damaged
(5) Inspect all threaded parts for damage.
threads.
4-100
