TM 5-5430-212-13P
.k.
After pressure reading has been taken, open the 4" filler/discharge valve on the tank and resume filling to
2-3 PSIG.
l.
Open the relief valve on the top of the tank until water flows from the valve.
m.
The belts should now be tightened with the ratchet handle. Tighten belts to the maximum possible with
one hand on the ratchet handle. The second hand should be used to steady the ratchet assembly so that
the belt will wind flat and true. After tightening each ratchet assembly, see that the ratchet handle has
dropped securely into the locking mechanism. When all ratchet assemblies have been tightened
uniformly, the pressure in the tank will be increased approximately 1 PSI.
NOTE:
If the tank ends are not level with the floor of the trailer the tank may be leveled by releasing the
ratchet on one side of the tank and then taking up the slack by tightening the opposite ratchet.
n.
After filling the tank to correct pressure, shut off filling line valve first, then shut off tank filler/discharge
valve. Disconnect filling line. Some loss of water between the valves will be experienced at this point.
Material is under pressure between the valves; low pressure if the filling line valve is shut off first as
directed above, and high pressure if the tank valve is shut off first.
NOTE:
The closed system of filling a tank allows the pressure to build up very rapidly as the tank reaches
full capacity. It is recommended that tank containers be filled to a final minimum pressure of 4
PSI and a maximum of 6 PSI.
o.
Keep pressure gage valve (3 Fig. 2-4) open to allow continual observation of tank pressure.
p.
Tank is now properly filled and secured for transportation. Regular periodic checks for tight belts is
recommended. They should be tightened at least every two hours. Tank must be transported only when
completely full or empty.
2-12.
Emptying
a.
The tank can be emptied either by gravity or by the use of a pump.
WARNING
DO NOT EMPTY TANK WITH AIR PRESSURE
2-9
