You can test it by hand. A vacuum gauge works best but not nessesary. mount it in a vise. Hold your finger over the inlet port. Work the lever. You should feel a suction or the gauge should show a vacuum. The vacuum ought to last for a few seconds. Put your finger on the outlet side & work the lever. It should build up pressure. This is pretty general. It still might leak when on the engine.
Last edited by Wrenchbender Ret.; 12/06/2009 6:01 PM.
