TM 55-1930-208-10
2- 11. PREPARATION TO UNLOAD - Continued.
(8) Adjust valve to tank 5 for a discharge rate that will insure most of the cargo in tank 5 remains when tank 6
is empty.
(9) Empty and strip tank 6 by methods described using tank 5 to prime the pump.
NOTE
At this point, tank 5 will be the only tank containing cargo.
(10) Open valve to tank 5. When tank is almost empty, throttle down engine to approximately 500 rpm.
Throttle down valve to tank 5.
Complete closing of the valve to tank 5 can only be for a few seconds.
(11) When the sucking of air is heard from tank 5, close valve completely for a few seconds.
(12) Repeat opening and closing of valve to tank 5 until it is impossible to remove any more cargo.
The cargo pump is lubricated internally by the cargo passing through it. Do not operate the pump dry for
any length of time. Damage to pump will result.
(13) Clear the cargo lines and hose if necessary. Operate cargo pump with suction valve wide open for a short
period of time. Do not overheat cargo pump.
(14) Disengage clutch. Adjust engine speed to 500 rpm and allow engine to idle five minutes. Refer to figure
w. The following information is provided as guidance for unloading mixed loads.
(1) Every precaution must be taken to avoid mixing and contaminating the various products.
(2) Insure no cargo leaks through valves or bulkheads.
(3) Keep a constant check during operations to insure all valves are set properly.
(4) Do not use dissimiliar products for stripping tanks.
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