Installing And Bleeding Pressure Gauge And Valve

NOTE: Before any pressure tests can be completed, it is necessary to install and bleed air from a gauge and valve, such as VW1318 or P378.

Although pressure testing valves and gauges may appear identical to those pictured in this article, DISREGARD handle position shown when making pressure tests on fuel system.
NOTE: Valves from the same manufacturer may appear the same, but may vary in interior design. When checking rest pressure or control pressure (either cold or warm), be sure valve on tester is OPEN. When checking system (line) pressure, be sure valve is CLOSED.
Install gauge and valve between control pressure regulator and fuel distributor, with valve toward control pressure regulator.
To bleed air from valve, hang gauge downward below valve and connecting lines. Open and close valve 4 or 5 times at 10 second intervals. Raise gauge so that it is now above valve and lines and proceed with testing.