> Hi guys,
>
,
> the pressure switch that should deactivate the gear motor when the
> required 1500 PSI is reached remains closed, meaning that the motor
> remains on. Eventually, the motor will burn out from this. This is
> apparently what happened to the previous motor. The bottom line is that
> you need a working pressure switch to resolve the problem. This is where
> it gets ugly. The switch assembly, now only available through Ratheyon, is
> $6K US.

*** Another killer part! It's not quite up to the $17,000 gascolator, but
it's up there.....

I wish that when Raytheon decides they're not going to sell any more of
something, they'd just take it off the @#$# parts list. That way, one
could go to the FSDO with a clear heart with plans for a substitute.

A quick web search for "Pressure Switch" revealed that such are a
standard industrial item. A 1500-PSI switch can be bought off the
shelf.

Compatibility worries would include

* Vibration: can it take the guff?
* Is the diaphragm compatible with aircraft hydraulic fluid?
* adapting the fluid fitting to the military-style stuff used in
aircraft...

- Jerry Kaidor ( jerry@tr2.com )




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