The lube oil strainer shown in the illustration is used on the reduction gear of a mid-size diesel engine. The strainer elements consist of __________. MO-0057

Correct Answer: Option D — metal disks

Edge-type mechanical filters utilize stacks of thin metal disks separated by scraper blades or spacers. Rotating the handle manually cleans trapped particulates from the disk edges without interrupting lube oil flow to reduction gears.