REFLECTOR: Hydraulic switch for gear doors

[Laurence Coen]

Jeff,

I believe the sequence valve for the gear doors acts like a check valve when 
not activated and is open in both directions when activated. You'll have to 
get oily for sure.

Larry Coen
N136LC

----- Original Message ----- 
From: "Jeff Clough" <jclough at gci.net>
To: <reflector at awpi.com>
Sent: Monday, February 28, 2005 7:20 PM
Subject: REFLECTOR: Hydraulic switch for gear doors


> OK folks...gotta question for ya......I recently reworked my correctly 
> operating hydraulic retract system to correct some poor workmanship 
> (Mine)....I also wanted to move the gear down dump handle. When all was 
> said and done I wound up reversing the connections on the hydraulic switch 
> which closes the gear doors. (I didn't THINK it mattered) Well, it seems 
> this switch may act a  bit like a diode in an electrical circuit in that 
> when pressure is applied to retract the gear, the nose gear doors start to 
> close before the switch is contacted...like there is some leak of 
> hydraulic pressure/fluid through the switch in this direction....did not 
> happen before when the system was working but plumbed differently...before 
> I get myself all oily and try to reverse the plumbing (I have the old 
> style location for this switch deep in the center console)...is this going 
> to fix this problem?  Anybody seen similar actions when the switch is 
> plumbed with the high pressue side different than plans? The switch 
> plunger  does not appear to be sticking ....it  slides in and out 
> easily......
>  Guess I am going to get all oily anyway....just wondering      Jeff 
> Clough
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