The fluid used as a source of actuating power against the underside of the unloader power element piston of the refrigeration compressor capacity control mechanism illustrated is obtained from where? Illustration GS-RA-13

Illustration GS-RA-13: the U.S. Coast Guard has not released this illustration.

Question

The fluid used as a source of actuating power against the underside of the unloader power element piston of the refrigeration compressor capacity control mechanism illustrated is obtained from where? Illustration GS-RA-13

Illustration GS-RA-13: the U.S. Coast Guard has not released this illustration.

Accepted Answer

Option B: discharge of the compressor lube oil pump. Hydraulic capacity control mechanisms on multi-cylinder marine refrigeration compressors utilize high-pressure lubricating oil discharged directly from the compressor lube oil pump as the actuating power source for the unloader pistons.