2-11. PREPARATION TO UNLOAD - Continued.
o. If a full unmixed cargo is to be unloaded, set the valves after the engine is running satisfactorily. (Refer to figure
(1) Open valves to tanks 1 thru 6 (1).
(2) Open suction valve (2).
(3) Open discharge valve (3).
(4) Close filling valve (4).
(5) Close bypass valve (5).
(6) Open discharge valve (6).
Figure 2-6. Cargo Unloading Control Valves.
p. Notify dock personnel that the vessel is prepared to unload cargo.
q. Adjust engine speed to approximately 500 rpm. Engage clutch to start pump.
r. Insure no leaks exist at hose and other connection points on deck.
If leaks exist, stop pump and do not restart operations until all deficiencies have been corrected.
s. Check pump room for leaks, particularly the pump seals. Recheck at least once every hour during unloading
operations. If leakage is excessive, the seals must be replaced.