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Randy, I'm confused. I'll keep this on a technical
focus.
Your gear operation modifications include replacing the HI
pressure switch, adding a second pressure switch to the LO circuit and doing
some re-wiring of the gear circuit.
The result is that when flying along with the gear UP
and hydraulic pressure happens to build in the LO side, your
modification will drive the pump to start LOWERING the gear while the gear
switch is still in the UP position. This is alarming! This will of course reduce
the pressure in the HI side causing the HI pressure switch to trip which
now reverses the pump and drives the gear back up, finally reducing
the pressure in the LO side. With the immediate reversing of the motor, surge
currents will be excessive and could possibly trip the pump circuit
breaker.
What manner of experience and/or engineering allows you to
consider this operation a good idea ?
Additionally, when on the ground, gear down, and the HI side
happens to build too much pressure (which prevents raising the gear), your
modification is not able to offer any help.
- - - - - - - - - - - - - - - -
The fix I developed does not require any re-plumbing, just
adding a small module at the existing pressure switches without requiring any
tools to install the push-on connectors. When necesssary, it runs the pump in
the direction selected by the current position of the gear switch which relieves
the pressure in the opposite side. Also, the module is fully
symetric and offers help with both HI side and LO side undesired pressure build
up.
Wolfgang
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