X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 13 Feb 2012 09:23:38 -0500 Message-ID: X-Original-Return-Path: Received: from nm16.bullet.mail.ac4.yahoo.com ([98.139.52.213] verified) by logan.com (CommuniGate Pro SMTP 5.4.4) with SMTP id 5393214 for lml@lancaironline.net; Sun, 12 Feb 2012 12:50:56 -0500 Received-SPF: none receiver=logan.com; client-ip=98.139.52.213; envelope-from=chris_zavatson@yahoo.com Received: from [98.139.52.194] by nm16.bullet.mail.ac4.yahoo.com with NNFMP; 12 Feb 2012 17:50:20 -0000 Received: from [98.139.52.170] by tm7.bullet.mail.ac4.yahoo.com with NNFMP; 12 Feb 2012 17:50:20 -0000 Received: from [127.0.0.1] by omp1053.mail.ac4.yahoo.com with NNFMP; 12 Feb 2012 17:50:20 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 216517.93072.bm@omp1053.mail.ac4.yahoo.com Received: (qmail 62696 invoked by uid 60001); 12 Feb 2012 17:50:19 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=09NJ+u3iZWe7R21kt6y+h7j2A8p+IXmzS/oMeSZNhmGvPn4aDd2yutA/QZ4zcJwFk6gUPmxgk6svUmr+j6PKxa/UopmzBalf6BHYM96OZfBkihnlnIjGeI1V3boeP+Nlzd5qVSf9S9Rw6QQg9q99QXfFuX27hp8flmiRXwHp3Xg=; X-YMail-OSG: mPAUba4VM1lde2LfwBvZNeE.9kJNo9Os88HiROVBzEVWKvB y_IupNZV7bpud1Zes51EkZtW4JSoVlZPqf.SopQNGBJA8HjrHg8LCUPpVoYf O4Unk3Vcu1GvUiOi_zdZCpCJnLU8f1QYAOyveWOIF4lpS1DrP1UoMiY1Yk46 wM9LPnxhRhzY2d2h_ynpXOyBBwc_sGKtazs7X.50nV2eLJJUVYprqRvgp.lc Jd1aEvvv1aV7WX1CeQKvAlozL_rVjYP3Zi4zMNjTiVldF6UMJkyq0jZIQUEv Iaq3EGM5h5aZPkq.BOL0QlkA0Xd9u9zXvCSL7VcuCxjBfseh9rWUP.38t5W7 f904HlPELFlRfOmyWEcDz45aXcNyQ1TsZOHlFBSEtTpjMgVQTekIjoQK8NAh 1I_.av8OLWv2Ps0m2Q7ukmlKboFKVObijuO5SriFwO75kOeCPOmukmkGDEPN d9RYEBnvCxv8LEqv3RU7s0E5584JuhG4UWgGpJfc.a.8lvDOEo4Hz9EEZK3E LzveitKjW1_wzMvULtqTqsnHQqemcnl6Rb4C3LNgOo1UyTkylMuGkCN0oT1p J2eiS Received: from [99.152.23.138] by web36907.mail.mud.yahoo.com via HTTP; Sun, 12 Feb 2012 09:50:19 PST X-Mailer: YahooMailWebService/0.8.116.338427 References: X-Original-Message-ID: <1329069019.26746.YahooMailNeo@web36907.mail.mud.yahoo.com> X-Original-Date: Sun, 12 Feb 2012 09:50:19 -0800 (PST) From: Chris Zavatson Reply-To: Chris Zavatson Subject: Re: [LML] Re: hydraulic pump servicing X-Original-To: Lancair Mailing List In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-2114655128-1942796572-1329069019=:26746" ---2114655128-1942796572-1329069019=:26746 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Christian,=0AOperationally I have only ever changed poppets if they were pr= oven to leak.=A0 That has happened only once on one pump back in '99.=A0 Po= ppet leaks are=A0extremely rare compared with cylinder leaks.=A0 If it isn'= t leaking, I would leave it alone.=A0 To check the poppet sealing you need = a few feet of hose (to give the system a bit of compliance) connecting both= pump output ports together.=A0 You'll also want a pressure gauge in the li= ne to see the time history of any pressure changes.=0AAs far as O-rings are= concerned, changing the=A0O-rings on the spool is the most beneficial as i= t is a dynamic seal.=A0 If degraded enough, it could eventually affect pump= operation.=A0 As a data point, I tested the friction of an 'incorrect i.e.= wrong duronmeter' O-ring on a spool that had been in service for=A011 year= s.=A0 It=A0was still good - 13 g's to move it.=A0 =0AThe=A0poppet valve bod= y and hex plug=A0O-rings are static and see a lot of compression at install= ation. I rarely change these.=A0 If you do, be very carefull in the removal= process not to damage the sealing surfaces.=A0 Do not use metal tools=A0to= pry the O-rings out.=A0 They are hard to remove as they are=A0very stiff= =A0and sit in=A0a tight fitting groove.=0AThese pumps are immensely robust = and rarely require attention=0A=A0=0AIt is interesting how Oildyne/Parker s= ells these pumps to Lancair for use in aircraft, while a local distributor = will not sell you a part for that very same pump.=A0The last time I ordered= parts from a distributor, the end use never came up.=0A=A0=0AChris Zavatso= n=0AN91CZ=0A360std=0Awww.N91CZ.net=0A=0AFrom: Christian Meier =0ATo: lml@lancaironline.net =0ASent: Sunday, February 12, 2012 8:33 A= M=0ASubject: [LML] Re: hydraulic pump servicing=0A=0A=0AChris, =0A=0AI trie= d to get a poppet valve from Oildyne in Austria. They told me that they won= t sell it because it is an Aircraft part. It will be sold only in a special= "priced" kit :-((=0A=0AAs my pump is from 97 I will soon change the O ring= s. Should I change every single O ring, or just the one on the spool. Does = the poppet need to be changed?=0AMy pump works well. There is only a small = internal leak on the low pressure side.=0AI have the asymmetric spool and n= o springs installed. I upgraded to the -32 pump-gear.=A0=0A=0AChristian=0A= =0Awww.lancair.at=0A=0A=0A=0A=0A=0AAm 12.02.2012 upm 02:50 schrieb Chris Za= vatson:=0A=0AJack,=0A>Ouch! That hurts to hear about the rebuild kits getti= ng so expensive.=A0 The good news:=A0The only critical part in the kit is t= he poppet valve, so you only need a kit if the poppet valve is leaking.=0A>= The O-ring designations I provided are the industry designation: =0A>013N90= =0A>014N90=0A>908=0A>These are for the hex plugs, poppet valve bodies, and = spool.=0A>=A0=0A>Chris Zavatson=0A>N91CZ=0A>360std=0A>www.N91CZ.net=0A>=A0= =0A>=0A>=0A>From: "marv@lancair.net" =0A>To: lml@yahoo.co= m =0A>Sent: Friday, February 10, 2012 7:26 AM=0A>Subject: [LML] Re: hydraul= ic pump servicing=0A>=0A>=0A>=0A>Posted for JON ADDISON = :=0A>=0A>=A0=0A>=A0Chris=0A>=A0The Parker pump kit (634412) went from $60 t= o now $123.=A0=A0In a direct email to =0A>me you indicated the o-rings of i= nterest are 013N90, 014N90 and 908 durometer =0A>90 (from McMaster) Thought= I'd try and share that info with the rest.=0A>=A0It appears a blackish see= page is emanating from the top of the pump itself =0A>and running down the = side of the pump into the reservoir. I haven't =0A>investigated it yet by t= aking it off the adapter.=0A>=A0Also, been looking at gages.=A0=A0So far 1 = 1/4 inch is the smallest and =0A>electric/sensor driven.=A0=A0Hydraulic dri= ven directly at that size only goes to =0A>2000psi and only good for 115% o= ver pressure.=A0=A0 It appears to me that with =0A>over temps driving, we w= ould best have at least 3000psi capability.=A0=A0 What =0A>have others foun= d??=A0=A0 Also, if hydraulic-direct gage is used with a 3 foot =0A>line wil= l the air purge itself out since there is no return line??=0A>=A0Jack Addis= on360JS=0A>=A0=0A>=A0=0A>=0A>=0A>--=0D=0DFor archives and unsub http://mail= .lancaironline.net:81/lists/lml/List.html=0A>=0A> ---2114655128-1942796572-1329069019=:26746 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Christian,
Operationally I have= only ever changed poppets if they were proven to leak.  That has happ= ened only once on one pump back in '99.  Poppet leaks are extreme= ly rare compared with cylinder leaks.  If it isn't leaking, I would le= ave it alone.  To check the poppet sealing you need a few feet of hose= (to give the system a bit of compliance) connecting both pump output ports= together.  You'll also want a pressure gauge in the line to see the t= ime history of any pressure changes.
As far as O-rings ar= e concerned, changing the O-rings on the spool is the most beneficial = as it is a dynamic seal.  If degraded enough, it could eventually affe= ct pump operation.  As a data point, I tested the friction of an 'inco= rrect i.e. wrong duronmeter' O-ring on a spool that had been in service for=  11 years.  It was still good - 13 g's to move it. 
The poppet valv= e body and hex plug O-rings are static and see a lot of compression at= installation. I rarely change these.  If you do, be very carefull in = the removal process not to damage the sealing surfaces.  Do not use me= tal tools to pry the O-rings out.  They are hard to remove as the= y are very stiff and sit in a tight fitting groove.
These pumps are imme= nsely robust and rarely require attention
 
It is interesting ho= w Oildyne/Parker sells these pumps to Lancair for use in aircraft, while a = local distributor will not sell you a part for that very same pump. Th= e last time I ordered parts from a distributor, the end use never came up.<= /SPAN>
 
Chris Zavatson
N91CZ
360std

From:= Christian Meier <lancair@meier.cc>
To: lml@lancaironline.net
Sent: Sunday, February 12, 2012 8:33 AMSubject: [LML] Re: hydrau= lic pump servicing

Chris,

I tried to get a poppet valve from Oildyne in Austria. They told me th= at they wont sell it because it is an Aircraft part. It will be sold only i= n a special "priced" kit :-((

As my pump is from 97 I will soon change the O rings. Should I change = every single O ring, or just the one on the spool. Does the poppet need to = be changed?
My pump works well. There is only a small internal leak on the low pre= ssure side.
I have the asymmetric spool and no springs installed. I upgraded to th= e -32 pump-gear. 

Christian





Am 12.02.2012 upm 02:50 schrieb Chris Zavatson:

Jack,
Ouch! That hurts to hear about the rebuild kits getting so expen= sive.  The good news: The only critical part in the kit is the po= ppet valve, so you only need a kit if the poppet valve is leaking.
The O-ring designations I provided are the industry designation:=
013N90
014N90
908
These are for the hex plugs, poppet valve bodies, and spool.
 
Chris Zavatson
N91CZ
360std
 

From: "marv@lancair.net" <marv@lancai= r.net>
To: lml@yahoo.com
= Sent: Friday, February 10, 2012 7:26 AM
Subject: [LML] Re: hydraulic pump servicing
<= /FONT>


Posted for JON ADDISON <jraddison@msn.com>:

 
 Chris
 Th= e Parker pump kit (634412) went from $60 to now $123.  In a direc= t email to
me you indicated the o-rings of interest are 013N90, 014N90 = and 908 duromete= r
90 (from McMaster) Thought I'd try and share that info with the rest. It appears a blackish seepage is emanating from the top of the pump= itself
and running down the side of the pump into the reservoir. I hav= en't
investigated it yet by taking it off the adapter.
 Also, b= een looking at gages.  So far 1 1/4 inch is the smallest and
electric/sensor driven.  Hydraulic driven directly at that s= ize only goes to
2000psi and only good for 115% over pressure. &nb= sp; It appears to me that with
over temps driving, we would best have a= t least 3000psi capability.   What
have others found?? &= nbsp; Also, if hydraulic-direct gage is used with a 3 foot
line will th= e air purge itself out since there is no return line??
 Jack Addiso= n360JS 
 

--

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