TM 10-4930-204-134-28.SIGHT GAGE, DIFFERENTIAL PRESSURE GAGE, PRESSURE VENT VALVE,AND DRAINCOCK.a.Removal.(1) Open pressure vent valve by depressing and locking it(fig. 4-26).(2) Open filter/separator draincock (fig. 4-27) and drainsolution into suitable container.Figure 4-27.Filter/Separator Gages and Valves, Removal andInstallation.(3) Remove two screws and washers and remove sight gage,gasket and float ball.(4) Disconnect flare nut couplings from differentialpressure gage.4-52
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