TM 5-4610-218-12
water hose outlet. This may not be possible if the
(2) Unload and unpack the supporting equip
tanks are located on a raised platform.
ment such as the distribution pumps, hoses, lines,
collapsible tanks, and chemical supplies from the
(3) Prepare a level firm foundation free of
van body and cargo trailer (para 4-1 and 4-2).
sharp stones and other objects that may puncture or
damage the tanks. The foundation for both tanks
(3) Electrically ground the truck chassis by
should be on the same level. Cover the foundation
driving a 30-inch long (. 76 m) metal ground
with the ground cloths to help protect the tanks
rod (fig. 4-5) into the earth near the vehicle and
from mildew and mold or other damage. If the nec-
clear of working personnel and equipment. Connect
essary material is available, it is advisable to con-
the bare copper cable of the ground rod assembly to
struct a wooden platform for the tanks. A platform
the ground clip, located at the left front of the van
several feet of the ground is desirable because it al-
body. The ground cable should be about 10 feet (3.5
lows the water to be distributed by gravity.
m) long.
(4) Refer to applicable storage tank commer-
WARNING
cial manual for erection instructions and erect stor-
age tanks.
Static electricity and leakage cur-
g. Raw Water Pump.
rents from electrical equipment build
(1) Select a suitable location for the electric
up in the trailer truck, and van body,
driven raw water pump, not more than 50 feet (15
and can cause injury or death to per-
m) from the water purification unit. Secure the
sonnel by electric shock unless proper
pump on a firm, level foundation of planking or tim-
grounding is used.
bers to prevent shifting and settling while in oper-
ation.
d. Trailer Mounted Generator Set.
(1) Uncouple the trailer from the towing vehi-
(2) When the situation requires it, use two
cle, lower and pin the front caster in a verticle posi-
raw water pumps in series. The maximum suction
tion, and lock the trailer brakes.
lift for each pump must not exceed 20 feet (6 m).
(2) Position the generator set not more than
NOTE
50 feet (16 m) from the water purification unit.
Ordinarily an adapter (fig. 4-6) is in
Level the trailer to insure proper operation of the
the water pump intake flange. A lso a
generator set. Use blocking timbers at the wheels to
nipple, elbow, and adapter are in-
prevent settling and movement of the trailer.
stalled on the discharge side of the
(3) Roll the canvas end flaps up to permit ven-
pump. In case the above items are not
tilation for cooling the generator set. Lower the
installed, it will be necessary to in-
tailgate.
stall them before attaching the hoses.
(4) Ground the generator set by driving a 30-
h. Raw Water Supply Lines
inch (.76 m) long metal ground rod into the earth
(1) After the raw water pump has been posi-
and conneting a number 6 bare copper cable to the
tioned, connect as many 1-1/2 inch rubber hose as-
ground rod and the generator frame. The cable
semblies as necessary to reach the water source (fig.
should be about 10 feet (3.5 m) long.
4-5). Connect the female end of the hose line to the
e. Unloading and Unpacking Equipment. Un-
hose end of the pump adapter. Connect the strainer
load and unpack the equipment in the same manner
to the other end of this hose line.
as instructed in paragraph 4-1 and 4-2.
(2) Submerge the suction hose strainer well
f. Location and Erection of Storage Tanks.
below the surface of the water but keep it off the
(1) Select a location as near to the water puri-
bottom to prevent clogging. Attach the float to the
fication unit as possible on the filter effluent side.
suction hose using wire rope of sufficient length to
permit submerging of the strainer.
(2) Position the tanks so that water will flow
into them by gravity from the van body filtered
(3) If the water at the source is 6 feet deep
(1.8 m), submerge the suction strainer approxi-
mately 3 feet (.9 m) below the surface.
4-8
