REFLECTOR: HYDRAULIC PUMP

[Tom Martino]

Thanks for the tip!
 
-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Laurence Coen
Sent: Sunday, July 16, 2006 9:56 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: HYDRAULIC PUMP
 
I'm talking about the emergency gear down handle.  The dump valve shaft
passes through a hex fitting much like you find on a sink faucet.  I
tightened it about 1/4 turn and now my gear will stay up for 24 hours
without cycling.
 
Larry Coen
	----- Original Message ----- 
	From: Tom Martino <mailto:tmartino at troubleshooter.com>  
	To: Velocity Aircraft Owners and Builders list
<mailto:reflector at tvbf.org>  
	Sent: Sunday, July 16, 2006 9:24 PM
	Subject: Re: REFLECTOR: HYDRAULIC PUMP
	 
	Could you elaborate?  I am not sure what you are calling the
"handle" ... and what a packing gland is ... sorry. 
	 
	-----Original Message-----
	From: reflector-bounces at tvbf.org
[mailto:reflector-bounces at tvbf.org] On Behalf Of Laurence Coen
	Sent: Sunday, July 16, 2006 5:43 PM
	To: Velocity Aircraft Owners and Builders list
	Subject: Re: REFLECTOR: HYDRAULIC PUMP
	 
	Tom,
	 
	There is a packing gland nut hiding under the handle.  Try
giving it a 1/4 turn before replacing the whole works.  It solved my
problem.
	 
	Larry Coen
	N136LC
	SE/RG Franklin/IVO
		----- Original Message ----- 
		From: Tom Martino <mailto:tmartino at troubleshooter.com>  
		To: reflector at tvbf.org 
		Sent: Sunday, July 16, 2006 3:14 PM
		Subject: REFLECTOR: HYDRAULIC PUMP
		 
		BACKGROUND:  This query comes as a result of my
hydraulic pump turning on and off quickly when gear was retracted.  A
gear retraction test revealed that the system is not holding pressure. 
		QUESTION:  Can anyone tell me the actual Manufacturer,
model and part number for our Hydraulic Pumps? (I realize I can get them
from Velocity, but I am curious about some other things and would like
to contact the manufacturer.)
		Also ... I am told there are "rebuild" kits for them.  I
know the rebuild kit includes "o" rings ... but they are for keeping the
fluid from leaking to the outside world.  
		My pump (and plumbing) had absolutely NO LEAKS -
anywhere.
		The only conclusion I could make is that the pressure
was "bleeding off" from the high side to the low side and the only parts
in the pump that maintain internal pressure are the "spring loaded
metal-seated cone check-valves" (one on each side).
		Do the rebuild kits include new springs and cones?
		Also ... has anyone ever had the "dump valve" leak
internally from high to low side?  Without showing any wear or exterior
leaking?  A local hydraulic shop tells me they hardly ever see those
simple quarter-turn vales go bad.
		Any help on any of this would be great!
		Tom
		
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