REFLECTOR: Landing Gear Pump Not Holding Pressure

[Scott Derrick]

far as I know there is down and up pressure...

Scott

-------- Original Message --------
Subject: Re: REFLECTOR: Landing Gear Pump Not Holding Pressure
From: Doug Kanczuzewski <doug at customstudio.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 01/06/2013 04:25 PM

> When gear is down you should not have any pressure and pump would not run. It only runs to maintain pressure when up.
>
> Doug
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Darrell & Nora Kufalk
> Sent: Sunday, January 06, 2013 3:21 PM
> To: 'Velocity Aircraft Owners and Builders list'
> Subject: Re: REFLECTOR: Landing Gear Pump Not Holding Pressure
>
> I didn't explain that very well.  The switches were still connected.  I capped the 2 lines going through canard bulkhead and I have the mechanical door actuator.  The switches are working correctly.  As soon as the pump stops, the pressure bleeds off somehow.
>
>
>
> -----Original Message-----
> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Carl Hoffman
> Sent: Sunday, January 06, 2013 3:53 PM
> To: Velocity Aircraft Owners and Builders list
> Subject: Re: REFLECTOR: Landing Gear Pump Not Holding Pressure
>
> Something is not making sense here. If both outlet tubes are capped off, where are the pressure switches that would cause the pump to cycle?
> One of the outlets is for the up side, and the other is for the down side.
> Maybe you just have a faulty down side pressure switch somewhere causing it.
> Over the past 12 1/2 years I've replaced mine twice.
>
>
> On 1/6/2013 3:10 PM, Darrell & Nora Kufalk wrote:
>> I was testing my landing gear on jack stands and gear pump began
>> cycling every few seconds.  It would only do it in the down position.
>> I traced it down to the pump itself.  With both outlet tubes caped off
>> it still cycles once or twice per second.  I pulled the pump out and
> removed the reservoir.
>> I took apart what looks like 2 check valves and they look ok to me.
>> I'm not sure what to do next.
>>
>> Anyone else have a problem like this?
>>
>> Darrell Kufalk
>>
>>
>>
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