Review on Sunsong 3403738 Steering Return Assembly by Bryan Aleman

I replaced the hard hose with this plus an o-ring and now my power steering pump is silent. No more whining. I wasn't sure what the yellow cap was for until some oil came out of the connector after I removed the hose. I assume the little yellow cap is for temporarily shutting off the system to prevent contamination or oil leakage when changing hoses.