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Re: REFLECTOR: Gear down hydraulic pressure.


I also had gone through a series of pressure measurments with the basic end
result the same as you.  I made some postings to the Reflector about this
about six months ago.  After discussing with the folks at Velocity (and at
their suggestion) I sent my switches back to VEP for recalibration (at my
expense of $45) with no net effect.

Contrary to the implication in the manual, the srews apparently adjust
bandwidth, with greatest effect on the "turn on" pressure.  My conclusion
finally was that the "turn off" pressure is determined more by the time
delay in the mechanical relays and pump inertia than by the pressure switch

Although the resulting pressures are obviously way beyond that needed for
gear down, and do result in unnecessary stresses in the system; they
apparently also do not result in any damage.  So, I guess, go fly and forget
about it; or consider solid state switches.

Al Gietzen  RGE

-----Original Message-----
From: MelBina@aol.com <MelBina@aol.com>
To: Reflector@awpi.com <Reflector@awpi.com>
Date: Saturday, September 12, 1998 10:34 AM
Subject: REFLECTOR: Gear down hydraulic pressure.

>Has anyone checked the gear down hydraulic pressure?  My gear is operating
>nicely, but the gear down pressure is 1000 psi, the same as the gear up
>pressure.  I found that by adjusting the two screws on top of the switch
>the "turn on" pressure changed, but not the "turn off" pressure.  I called
>Scott Swing and we assumed that I had received a switch that was
>marked and he sent me a new one.  The new switch also turns off at 1000 psi
>the gear down cycle.  I reported this to Scott this morning and he said
>he has never checked the down side pressure so he can't verify the
>of the switch.
>     Scott also says that there is nothing wrong with 1000 psi on the down
>side so I am about to forget the problem and move on.  Can any of you add
>info on this subject?
>Mel Bina     STD  RG