eliasafr Posted July 30, 2025 Share Posted July 30, 2025 (edited) During starting while no2&3 eng running, after switch off hyd pump switch low press worning light goes on but press shows 2200psi on booster press indicator. With no 3eng shutdown press goes zero. Its for C-130B ac. Any suggestion please Edited July 30, 2025 by eliasafr Quote Link to comment Share on other sites More sharing options...
hehe Posted August 11, 2025 Share Posted August 11, 2025 Need a better description of which engines are running, which switches are being energized, and what the other pressure indications display. For example: is #4 running or shut down? what pressure does rudder pressure indicate on panel and in the back near rudder? Which engines hyd switch are on/off? Are all engines upsped or downsped Is the elevator on or off the stop? Down or pulled up to neutral? What does the booster accumulator pressure read? Does the light come on when engines are shutdown? Please provide more details Quote Link to comment Share on other sites More sharing options...
victorp1 Posted September 27, 2025 Share Posted September 27, 2025 On baseline C-130 aircraft when an engine driven hydraulic pump switch is placed in the OFF position that low pressure will illuminate because the switch supplies a ground for the low-pressure light, regardless of the hydraulic system pressure. Quote Link to comment Share on other sites More sharing options...
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