Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sun, 06 Mar 2005 14:58:56 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d20.mx.aol.com ([205.188.139.136] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 772488 for lml@lancaironline.net; Sun, 06 Mar 2005 11:23:30 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.139.136; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d20.mx.aol.com (mail_out_v37_r3.8.) id q.2b.6e416cf3 (1320) for ; Sun, 6 Mar 2005 11:22:43 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <2b.6e416cf3.2f5c8853@aol.com> X-Original-Date: Sun, 6 Mar 2005 11:22:43 EST Subject: Re: [LML] Re: 360 Hydraulics Problem X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1110126163" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1110126163 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 3/6/2005 9:23:55 A.M. Central Standard Time, Mquinns@aol.com writes: After looking at the picture, it appears that the pump could use either side as the high pressure one, as long as one knew which way the "O" ring pointed. Is it possible the "reversed spool valve" was the design intention of the manufacturer? Could we (builders) or Lancair just be putting the pressure valves in the wrong ports? If I had your picture prior to putting the hydraulic system together I think I would have opened the pump up, ascertained which way the spool valve pointed and put the pressure switches in accordingly. Mark, Not quite as simple as that. Each pump port has an internal "relief" valve that is to be generally set to about 400 psi above what you want the port to deliver. If the hydraulic connections would be reversed, the down side would have a very high pressure safety relief valve and the up side wouldn't reach the required value of the pressure switch. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Fair and Balanced Opinions at No Charge! Metaphysical Monologues used at your own Risk. -------------------------------1110126163 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 3/6/2005 9:23:55 A.M. Central Standard Time,=20 Mquinns@aol.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>After=20 looking at the picture, it appears that the pump could use either side as=20= the=20 high pressure one, as long as one knew which way the "O" ring pointed. Is=20= it=20 possible the "reversed spool valve" was the design intention of the=20 manufacturer? Could we (builders) or Lancair just be putting the pressure=20 valves in the wrong ports? If I had your picture prior to putting the=20 hydraulic system together I think I would have opened the pump up, ascerta= ined=20 which way the spool valve pointed and put the pressure switches in=20 accordingly.
Mark,
 
Not quite as simple as that.  Each pump port has an=20 internal "relief" valve that is to be generally set to about 400 psi ab= ove=20 what you want the port to deliver.  If the hydraulic connections would=20= be=20 reversed, the down side would have a very high pressure safety relief valve=20= and=20 the up side wouldn't reach the required value of the pressure switch.=20
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fai= r=20 and Balanced Opinions at No Charge!
Metaphysical Monologues used at your=20= own=20 Risk.

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