TM 10-4610-239-24
TM 08580B-24/3
DISASSEMBLY.
NOTE
Cover a 6-foot (1.83 m) square area of the floor in front of lower
flange cover to catch filtration material.
a. Remove eight nuts (1), flange cover (2), and gasket (3) from top handhole (4). Discard gasket.
WARNING
Weight of media is over 1000 pounds (454 kg). Remove flange
cover carefully to avoid personal injury from flange cover
movement.
b. Remove 12 nuts (5), flange cover (6) and gasket (7) from bottom handhole (8). Discard gasket.
CAUTION
Be careful while removing media not to damage laterals with
tools.
c.
Using a hold scoop, remove filtration material from multimedia filter (9) and discard.
d. Turn multimedia filter (9) on side and use garden hose to flu h out remaining media.
s
CLEANING.
a. Inspect inside and outside of multimedia filter for cracks, leaks, damage or excessive corrosion. Replace
damaged multimedia filter. Refer to paragraph 3-18.
b. Inspect all inside parts for corrosion and wear. Ensure diffuser tube vent lines and screens are not clogged.
ASSEMBLY
CAUTION
Pouring course gravel through upper handhole opening may
damage internal laterals.
a. Place a total 245 pounds (110.25 kg) of 1/4-inch medium underbed gravel in multimedia filte (9)
r
through lower handhole opening (8).
b. Use paddle or narrow board to level gravel.
c. On lower handhole opening (8), install new flange gasket (7), flange cover (6), 12 nuts (5).
NOTE
Steps a through i must be performed in sequence.
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