Return-Path: Received: from smtp7.gateway.net ([208.230.117.251]) by ns1.olsusa.com (Post.Office MTA v3.5.3 release 223 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Wed, 24 May 2000 03:06:07 -0400 Received: from oemcomputer (1Cust202.tnt1.coeur-dalene.id.da.uu.net [63.27.107.202]) by smtp7.gateway.net (8.9.3/8.9.3) with SMTP id DAA19969 for ; Wed, 24 May 2000 03:12:04 -0400 (EDT) Message-ID: <001001bfc550$2e081380$ca6b1b3f@oemcomputer> Reply-To: "dfs" From: "dfs" To: "Lancair List" Subject: Hydro cylinder rebuild Date: Wed, 24 May 2000 00:17:53 -0700 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> As mentioned here in the last few weeks, I've had a retract cylinder internal leakage problem that resulted in hydro pump "pulses" every few seconds. After isolating the offending cylinder (the right main) and obtaining the required rebuild kits from Lancair, I proceeded to undertake the rebuild of that cylinder. After disassembling the offending unit, I started the overhaul process. All went OK until I tried to insert the main piston in the barrel. On each side of the "T" shaped main seal, very thin split keepers (phenolic maybe) are installed that are about the same thickness as the snap-ring grooves in the cylinder ID. Sliding the new seal and keepers into the cylinder, the "keepers" would inevitably pop into the grooves and the piston would go no further without damaging the keepers. After sacrificing the first set, trying to get the keepers past the grooves, I installed the set from my second rebuild kit and after about an hour of twisting and cussing, they finally slid past and into the cylinder bore. A test of the rebuilt cylinder shows that the internal leak is fixed and the gear works properly - however - is anyone out there knowlegable on the correct technique for getting the cylinder back together without this problem? I'm sure that it's just a matter of time before I will need to overhaul another cylinder - and I really don't want to have the same reassembly problems I have had with this one. Dan Schaefer >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html LML Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>