X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 06 Nov 2006 12:00:55 -0500 Message-ID: X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop-Diagnostic: ########## X-Orig-Return-Path: glaznic@mccus.jnj.com X-PolluStop-Score: 1.00 X-PolluStop: Scanned with Niversoft PolluStop v2.3.4 X-SpamCatcher-Score: 10 [X] X-Original-Return-Path: Received: from [148.177.2.32] (HELO ncsusraimgo01-ext.na.jnj.com) by logan.com (CommuniGate Pro SMTP 5.1.1) with ESMTPS id 1531283 for marv@lancaironline.net; Mon, 06 Nov 2006 09:08:10 -0500 Received-SPF: none receiver=logan.com; client-ip=148.177.2.32; envelope-from=GLaznic@MCCUS.JNJ.com Received: from unknown (HELO NCSUSRAEXIMS2.na.jnj.com) ([10.4.20.170]) by ncsusraimgo01-ext.na.jnj.com with ESMTP; 06 Nov 2006 09:05:4 X-IronPort-AV: i="4.09,391,1157342400"; d="scan'208,217"; a="10510006:sNHT43844634" Received: by ncsusraexims2.na.jnj.com with Internet Mail Service (5.5.2658.3) id ; Mon, 6 Nov 2006 09:07:50 -0500 X-Original-Message-ID: <84C50C25120F254CACB81CDE4372EF4C83AA42@mccusfwexs2.na.jnj.com> From: "Laznicka, Garry [MCCUS]" X-Original-To: "'Sky2high@aol.com'" , "'christopher.zavatson@baesystems.com'" X-Original-Cc: "'marv@lancaironline.net'" Subject: [SPAM] L-360 Hydraulic System X-Original-Date: Mon, 6 Nov 2006 09:07:40 -0500 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2658.3) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C701AC.EBE06FD9" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C701AC.EBE06FD9 Content-Type: text/plain; charset="ISO-8859-1" Scott, Chris, I would like to follow up here on previous chain of mails concerning hydraulic-power-pack and its numerous glitches folks with L-320/360 have been experiencing and also your responds to some of those mails in August and September. My hydraulic system is freshly installed and tested. I was very happy with it since it was working great from the first with no problems initially,... me cycling it (plane on jacks) up/down for many times in past few weeks. Then I experienced the problem: when upon up (retraction) command gears went up 75% only, and rest of the movement was in 4 to 7 very short burps to reach full up. I increased the pressure setting on the "H" switch and that fixed the problem, but pressure was not 1000 - 1100psi any more but 1300 - 1400psi. I played with the system and identified that back pressure in the "low" lines are causing the pump to work hard upon "up" command is in fact due to back pressure within the power pack itself. If I disconnect "low" lines from power-pack right at the power-pack, with oil return by-passing the power-pack and with "H" switch set to its original setting, gears go up (as before) in one smooth motion and pressure stay locked at 1000psi. I have removed 2 cap screws (with small spring behind it) from power-pack, (looking at Scott's picture of spool parts from 8/29/06),... I was not able to remove rest of the spool components from the power-pack since I do not know how to do it properly. I suspect that my back pressure problem is due to spool or its "O" rings (or perhaps dirt) within the power-pack. Also, quote:" <> This is normal." End of quote. Well with my system, I am always able to move gears by hand if the dump valve is open. Does this indicate I have some other issue to worry about? Would much appreciate your opinions and help on these. Please write or feel free to call (215) 273-8343 Regards, Garry V. Laznicka L-360c 75% ------_=_NextPart_001_01C701AC.EBE06FD9 Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable L-360 Hydraulic System

Scott, Chris,
I would like to follow up here on = previous chain of mails concerning hydraulic-power-pack and its = numerous glitches folks with L-320/360 have been experiencing and also = your responds to some of those mails in August and = September.

My hydraulic system is freshly = installed and tested. I was very happy with it since it was working = great from the first with no problems initially,... me cycling it = (plane on jacks) up/down for many times in past few weeks.

Then I experienced the problem: when = upon up (retraction) command gears went up 75% only, and rest of the = movement was in 4 to 7 very short burps to reach full up. I increased = the pressure setting on the "H" switch and that fixed the = problem, but pressure was not 1000 - 1100psi any more but 1300 - = 1400psi.

 
I played with the system and = identified that back pressure in the "low" lines are causing = the pump to work hard upon "up" command is in fact due to = back pressure within the power pack itself. If I disconnect = "low" lines from power-pack right at the power-pack, with oil = return by-passing the power-pack and with "H" switch set to = its original setting, gears go up (as before) in one smooth motion and = pressure stay locked at 1000psi.

I have removed 2 cap screws (with = small spring behind it) from power-pack, (looking at Scott's picture of = spool parts from 8/29/06),... I was not able to remove rest of the = spool components from the power-pack since I do not know how to do it = properly. I suspect that my back pressure problem is due to spool or = its "O" rings (or perhaps dirt) within the = power-pack.

Also, quote:" <<The gear = could not be raised by hand even with the dump valve open.>> This = is normal." End of quote. Well with my system, I am always able to = move gears by hand if the dump valve is open. Does this indicate I have = some other issue to worry about?

Would much appreciate your opinions = and help on these. Please write or feel free to call (215) = 273-8343
Regards,
Garry V. Laznicka
L-360c 75%
 

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