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Re: Continuous running hydraulic
pump
More observation:
If I leave my flap lever in the neutral position, the hydralic
reservoir remains fully pressurized, and next time I fly there's no
need for the pump to come on during power up to recharge the system.
I understand that some planes/pilots must leave their flap lever
in the UP position, or the DOWN position to retain hydralic pressure
until the next flight. If I did this, all pressure would be
released. Why the difference with what is the same valve?
I also have seen the flaps move (briefly) in the opposite
direction if lever is positioned just slightly off of neutral, during
routine operations; I agree that this is a quirk in the internal
valve.
Jeff Liegner
LIVP
This is case
of creating a problem that wasn't there. My experience might
ease someone's tension in the future.
While
practicing an approach I got a "check engine" from the
Chelton. The indication was low voltage. I quickly saw the
hydraulic pump was running continuously. I pulled the hydraulic
pump breaker. I got a "gear transition" light so I
suspected no hydraulic pressure which was confirmed when I looked at
the gauge.
I figured
the best thing to do was to leave everything as it was and hand
pump the gear down and land. This worked just
fine.
Now the
problem was that for the first time in over 600 hours of flying this
thing, when I had set the flaps at 10 degrees I had left the flap
handle a little out of the detent and the valve was just
dumping the high side pressure to the low side and just kept the
hydraulic pump running.
Some days I
think that if every thing is going well I just create a problem for
the practice. At least my rebuild of the gear hand pump worked
well.
Dan
Reagan
IVP 650
hours
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