Return-Path: Received: from neti.saber.net ([205.139.65.2]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-52269U2500L250S0V35) with ESMTP id com for ; Mon, 21 Jun 1999 01:15:12 -0400 Received: from default (o-s8-p2-85160.saber.net [205.139.85.160]) by neti.saber.net (8.8.6/8.8.6) with ESMTP id WAA23802 for ; Sun, 20 Jun 1999 22:18:09 -0700 (PDT) Message-Id: <199906210518.WAA23802@neti.saber.net> From: "fred" To: "Lancair List" Subject: Intermittant Hyd Pump Cycling Date: Sun, 20 Jun 1999 21:06:12 -0700 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Bob Jude has problems with intermittanf Hyd. pump cycling. Boy, have I had this one!!!! The first thing to change, whether you think it is the problem or not, is the damm dump valve (ddv). The ddv is very cheap,(that is why it fails) and can be changed in about 30 min. I know because I have done it 3 times.If that doesn't solve your problem (90 % of the time it will ) , then remove your seats and get a fitting that will seal each main wheel cylinder on the inside of the seat bulkhead, each gear door cylinder on the up-side, and then the nose wheel on the up-side ( I forget exactly where I did that one). Essentially you are isolatting each cylindar, one at a time while you do a retract test. When you find one that stops the cycling, you have a beer and replace the seals in the cylinder. But you never got this far because the DDV was the problem. Sincerely, Fred 9BF ( don't fly like my brother) >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML homepage: http://www.olsusa.com/Users/Mkaye/maillist.html