Return-Path: Received: from mail.thenuthouse.com ([209.26.43.20]) by truman.olsusa.com (Post.Office MTA v3.1.2 release (PO203-101c) ID# 0-44819U2500L250S0) with SMTP id AAA19276 for ; Sun, 11 Oct 1998 20:01:52 -0400 Received: from default [209.26.43.180] by mail.thenuthouse.com with ESMTP (SMTPD32-4.06) id A747A32700F2; Sun, 11 Oct 1998 20:03:19 EDT Reply-To: From: "jimsol" To: Subject: Hydraulics... Date: Sun, 11 Oct 1998 20:00:44 -0400 X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> Here's a puzzler for those who are already flying 320/360's. It concerns the hydraulic system (!@#$%^&*). Master Switch On.. pressure OK Start up...pressure OK Taxi ...pressure OK Takeoff....Retract....pressure OK Flying....pressure OK Return to airport...lower gear....(Down and locked) PUMP Recyles every 3 secs, for approx. 30 secs. Pump stops. Land....pressure OK Taxi back to hangar...pressure OK Hmmmmmm.......Only after a flight, on the Low Pressure side. The consensus opinion leans towards an air bubble somewhere in this "...self bleeding" hydraulic system. I loosened the fitting at the Low Pressure switch, and re-tightened it. Went up again....the pump only came on 3 times (!) then stopped. Lesson: The hydraulic switches are the 'high points' of the system. Air bubbles would NOT be able to migrate back to the reservoir if they got to the switches. Jim Solensky p.s. I've already had to rebuild both retract cylinders in less than 100 hrs. That's probably how the bubble got in the system.