X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 26 Mar 2013 12:41:24 -0400 Message-ID: X-Original-Return-Path: Received: from carbinge.com ([69.5.27.218] verified) by logan.com (CommuniGate Pro SMTP 6.0.2) with SMTP id 6141649 for lml@lancaironline.net; Tue, 26 Mar 2013 10:20:21 -0400 Received-SPF: none receiver=logan.com; client-ip=69.5.27.218; envelope-from=jbarrett@carbinge.com Received: (qmail 27098 invoked from network); 26 Mar 2013 14:19:46 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; h=X-Originating-IP:Reply-To:From:To:References:In-Reply-To:Subject:Date:Message-ID:MIME-Version:Content-Type:X-Mailer:Thread-Index:Content-Language; s=default; d=carbinge.com; b=TJyzkIbaPRxDD48OyFVJ6bXWkP5s20L21lOyQyyOiMObgJRkO9k3ADUv8rpCchrBau+RXLogwymkmRGKxMT7jvGAsYA2RLU5qhshyoPy12Q5pgbr+ibiHKRqskWij3r+KFkdFUsQMVz9h/A1EEopih6p/Uy+98hGirpmqtgM7GM=; X-Originating-IP: [66.235.58.245] Reply-To: From: "John Barrett" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Hydraulic gear pump failure - Relays X-Original-Date: Tue, 26 Mar 2013 07:19:46 -0700 X-Original-Message-ID: <003e01ce2a2c$f865ecc0$e931c640$@com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_003F_01CE29F2.4C0714C0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Ac4qK0djIZiUFuhbTZq/VV8H3P+D8QAAU6iw Content-Language: en-us This is a multi-part message in MIME format. ------=_NextPart_000_003F_01CE29F2.4C0714C0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit The only caveat with that fix, Fred, is that intermittent relays are there for a purpose. They are supposed to be the weak link in a circuit where a continuous stuck relay could result in greater problems than a failure. Does that protective function matter in this circuit? Should be considered. John From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Frederick Moreno Sent: Tuesday, March 26, 2013 7:07 AM To: Lancair Mail (lml@lancaironline.net) Subject: [LML] Hydraulic gear pump failure - Relays The relay on my Lancair IV hydraulic pump became intermittent after a few hundred gear cycles. Usually worked, but stopped and required recycling of gear handle and some pressure pulses to get it to work again. A good friend who used to run a marine supply and repair business said that in England where he used to live and here in Australia, only Cole Hersee relays were acceptable to marine authorities for critical ships power systems. Nothing else qualifies. Our local auto store sells both the cheapies and the Cole Hersee (seaport town), both intermittent for starters, and continuous for up to 80 amps. Removed the intermittent starter-style relay that came with the kit, put in the continuous duty (same external dimensions, configuration) since the circuit breaker on that circuit is 50 amps, had to rewire the relay (intermittent and continuous duty are wired differently - one grounds to case, other does not), and works fine so far. But they cost. Out here in Australia, figure about $80, but all that know their stuff in this area said it is well worth the money, and legally required off-shore. I note that URL for the relay vendor in one of the email carries Cole Hersee. Go for it. Fred Moreno ------=_NextPart_000_003F_01CE29F2.4C0714C0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

The only caveat with that fix, Fred, is that intermittent relays are = there for a purpose.  They are supposed to be the weak link in a = circuit where a continuous stuck relay could result in greater problems = than a failure.  Does that protective function matter in this = circuit?

Should be  considered.

John

 

From:= = Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of = Frederick Moreno
Sent: Tuesday, March 26, 2013 7:07 = AM
To: Lancair Mail (lml@lancaironline.net)
Subject: = [LML] Hydraulic gear pump failure - = Relays

 

The relay on my Lancair IV = hydraulic pump became intermittent after a few hundred gear = cycles.  Usually worked, but stopped and required recycling of gear = handle and some pressure pulses to get it to work again.  =

 

A good = friend who used to run a marine supply and repair business said that = in England where he used to live and here in Australia, only Cole = Hersee relays were acceptable to marine authorities for critical ships = power systems.  Nothing else qualifies.  =

 

Our = local auto store sells both the  cheapies and the Cole Hersee = (seaport town), both intermittent for starters, and continuous for up to = 80 amps.  Removed the intermittent starter-style relay that came = with the kit, put in the continuous duty (same external dimensions, = configuration) since the circuit breaker on that circuit is 50 amps, had = to rewire the relay (intermittent and continuous duty are wired = differently - one grounds to case, other does not), and works fine = so far. 

 

But = they cost.   Out here in  Australia, figure about $80, = but all that know their stuff in this area said it is well worth the = money, and legally required off-shore.  I note that URL for the = relay vendor in one of the email carries Cole Hersee.  Go for it. =

 

Fred = Moreno

 

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