TM 10-410-221-24
Section XIII. SHELTER WATER SYSTEM
replace damaged screen. Clean screen assembly by
General
washing with clean water under slight pressure and
hitting against a solid surface using care not to dam- age
This section provides instructions for repair and
screen assembly.
replacement of those items considered as part of the
c. Installation. Install drain sump assembly in
shelter water system.
Items of the water system
reverse order of removal procedure using figure 2-14 as
repairable or replaceable at organizational level
a guide and observing the following.
maintenance consist of a drain sump assembly,
(1) Position the sump legs over the inserts in
centrifugal sump pump assembly, check valve and
the floor and secure in place using bolts (17) and
miscellaneous fittings and clamps (fig. 2-14).
washers (18, 19).
(2) Install tee and new packing (14) in outlet
Drain Sump Assembly
boss. Tighten nut (13). Install union (15) and new
packing (16) in vent boss.
a.
Removal.
(3) Connect float switch electrical -leads.
(4) Connect and tighten plumbing line to
Caution: Turn off power to shelter before
sump.
disconnecting electrical leads from float switch.
Centrifugal Pump Assembly
(1) Disconnect vent and drain inlet lines from
side of drain sump (20, fig. 2-14). Disconnect outlet line
a. Removal.
Remove damaged or defective
from bottom of sump (20).
pump assembly according to sequence of index
(2) Loosen nut (13) and remove tee from
numbers assigned to figure 2-14 and observing the
outlet drain boss; remove packing (14). Remove union
following.
(15) from vent boss on sump (20) and remove packing
(16). If applicable, remove union from inlet boss and
(1) Disconnect inlet and outlet lines from
remove packing.
pump (4, fig. 2-14) located inside water service inlet box.
(3) Disconnect float switch electrical leads.
(2) Disconnect electrical connector from end
(4) Remove bolts (17) and washers (18, 19)
of pump (4).
from drain sump legs and remove sump (20).
(3) Remove nuts (2) and washers (3)
b. Repair. Repair the shelter sump assembly as
securing the pump to the pump mounting bracket.
required to return to a serviceable condition as follows.
(4) Loosen and slide off clamp (1) securing
(1) Inspect drain sump assembly for dam-
pump (4) to pump mounting bracket.
aged threads, nicks, dents, or burrs. If possible, dress
(5) Remove pump (4) from water service inlet
all nicks and burrs with emery cloth assuring that enough
box.
wall thickness of sump remains to assure sufficient
b. Installation. Install centrifugal pump assembly
strength. Minor dents in :the sump assembly are
(4, fig. 2-14) in reverse order of removal procedure
acceptable so long as the function or fit is not affected.
using figure 2-14 as a guide and observing the following.
Dress minor damage to threads with emery cloth and
Caution: Be sure electrical source is off
no leaks present. If methods listed above cannot return
before , connecting electrical leads.
the sump assembly to serviceable condition, replace the
sump assembly.
(1) Position pump (4) in proper position and
secure with nuts (2) and washers (3).
(2) Remove clamp which secures cover assembly
to sump and inspect filter screen for damage or dirt,
