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Piper Seneca,



 
 
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  #1  
Old December 30th 04, 11:00 AM
In Soo
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Default Piper Seneca,

I have a quick question regarding system on a piper seneca. IT is !!! what's
the pressure on Hydraulic system when the gear is uP? and how about when it
is going down?
I check with the Mainteneace today, they said somewhere around 600~800 PSI,
but I always thought it was somewhere around 1500s. So, if anyone knows the
answer, great! Thanks

In Soo hwang


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  #2  
Old December 30th 04, 02:25 PM
Thomas Lembessis
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Default

According to my M/M:
High Pressure (Gear UP) pump puts out 2000 psi. It is turned off,
however, by a pressure switch @ 1800 +/- 100 psi.
Low Pressure (Down) is 500-800 PSI, just as your Maintenance people said.

Interesting note: The POH for my Seneca has a schematic which shows the pump
(gear up) operation as being turned off by the up-limit switches. The M/M
correctly shows the pump being shut off by the pressure switch.

Just hope that you never have to replace that pressure switch. It cost me
over 400 bucks (USED), a few years ago
"In Soo" wrote in message
news:EkQAd.11650$c%[email protected]
I have a quick question regarding system on a piper seneca. IT is !!!

what's
the pressure on Hydraulic system when the gear is uP? and how about when

it
is going down?
I check with the Mainteneace today, they said somewhere around 600~800

PSI,
but I always thought it was somewhere around 1500s. So, if anyone knows

the
answer, great! Thanks

In Soo hwang




 




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