LCC20 113: Lube Oil

Question 1

purpose of Lube Oil

Answer 1

Heat removal and lubrication to the bearings and gears of the main reduction gears

Question 2

types of Lube oil pumps

Answer 2

Attached Lube Oil Pump (ALOP)
Standby Lube Oil Pump (SLOP)
Emergency Lube Oil Pump (ELOP)

Question 3

Lube Oil Cooler

Answer 3

single pass, shell and tube heat exchanger. maintains temp between 120-130 degrees. Uses seawater to cool oil. Seawater pressure is maintained at 6-8psi and L/O pressure is maintained at 12-14psi to ensure if any leakage, L/O leaks into water and not the other way around.

Question 4

L/O Strainer

Answer 4

fine mesh metal screen with two magnetic baskets to trap metal particles that can indicate issues with bearings or gears

Question 5

L/O purifier

Answer 5

Removes both water and sediments. one disk type that uses centrifugal force to remove sediment. sediment is clarified and water is separated

Question 6

L/O Storage

Answer 6

Three 760 gallon tanks store good oil.

Two 788 gallon tanks store bad oil.

Question 7

Attached Lube Oil Pump (ALOP)

Answer 7

Attached to Reduction Gear. used when shaft is turning greater than 94rpm. Pumps at 430gpm

Question 8

Standby Lube Oil Pump (SLOP)

Answer 8

Delivers oil to the main engine when the shaft is turning less than 94rpm. Pumps at 400gpm

Question 9

Emergency Lube Oil Pump (ELOP)

Answer 9

Used as a back up for the SLOP. Used at start up and shutdown of main engines. Pumps at 275gpm