SMTA hydraulic pump

Hayfarmer · Jul 14, 2018

I ordered a new hydraulic pump for my SMTA from this site. On the top of the pump there is a plug with a spring under it. My old pump didn't have it so wondering what it is for?

Tom Dowling · Jul 14, 2018

thinking it's a relief/bypass

Janicholson · Jul 14, 2018

My thoughts as well. It has been used as a purging/priming port many times. It may relieve end frame leakage by reducing the effective pressure in the seal area. The seals are for sure not rated at system pressure. The spring is not strong enough to resist even modest pressure, and I think it is ported into the suction side. Jim

SMTA hydraulic pump

Hayfarmer

Well-known Member

Tom Dowling

Member

Janicholson

Well-known Member

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