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Many years ago I had a Cub that would loose oil pressure when left for a few weeks. I went and bought
some STP . The stuff I am referring to is a thickener which I suspect is the same material in diluted form
that oil blending plants add to light oil to make Multi Viscosity product. Before ever trying it, mix it first
with some warm oil otherwise it will go to the bottom of the oil tank and for certain there will not be any
oil pressure. It had to be mixed well with oil first. I would think that the problem that you speak of would be
improved upon simply by using a heavier weight oil and letting your engine idle longer so as to cool the oil .
It is my understanding that these old engines were never built as tight as say a new automobile engine,
therefore a single grade of heavier weight engine oil is my own preference for my aircrafts.
Ron Hynes
-------Original Message-------
Roy
I had a similar problem with my Ercoupe C-90 with a spin on filter. I was on the way to Oshkosh and stopped for fuel. When I restarted the motor I had 0 oil pressure. I tried to pressurize the oil pressure line, refilled the filter with oil, added more oil to the tank. Nothing worked. I waited 4 hours and tried it again and I had full pressure. It happened again and I was starting to worry about my motor. When I got to Oshkosh, I went to the Continental booth and ask to speak to someone who could give me technical advice. I told him the story and he said
"yeah, sometimes they do that". I said what do you mean by that? He told me that the engines will do that when they sit for a long time or when they are hot. He said I was the 4th person to tell him the same story that day. I ask him what to do and he said "when its hot, you wait till it cools, if its cold you fill the filter with oil and it will pick up the pressure. I ask about rebuilding the pump and he told me it could still do it after. He also said that most of the engines never have this problem. I still dont know the answer to the problem.
Bill
----- Original Message -----
From: Roy Stubbs
Sent: Monday, August 07, 2006 10:12 AM
Subject: [COUPERS-TECH] Help needed
----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- My aircraft has not been started since mid-May (just before my lower back surgery). When I went to check it out and started the engine the oil pressure stays at zero. It has oil in it. This has never happened in five years and 400+ hours of short hop (i.e., a lot of cycles) flying. It has sat for longer periods without start up. It is a C-85-12 with spin-on oil filter. Has anyone had any similar experience? Suggestions? Thanks, Hello Glenn,
I don't know if this information will help but here it is. I thought I would bounce your brake problem off my AP during coffee at the airport yesterday. The rebuilt $2400 master cyl may be good. My AP said "the Hayes are very tricky to bleed". Try this it may work until you get the Clevelands on at the other airport. Here is a follow up E-mail he sent me:
jim
didn't get your e-mail about the brakes but if its like the older expander tube brakes you had to pressurize the system at the wheel bleeder fitting until the brakes lock up then remove the hyd pressure pot and bleed off the pressure at the bleeder fitting until wheel turns free and you should have a hard pedal.
norm
Gang As some of you may know, I use my Ercoupe to teach people with disabilities to fly. One of my students, Ed Granato, has recently purchased an Ercoupe of his own to complete his training. We flew it together from Florida to New York three months ago. As soon as we got to NY, the brakes ceased to work. It has the old Hayes brakes. The local mechanic at HPN said he has Ercoupe experience and offered to fix the problem. He rebuilt the master cylinder and bled the brakes. He then presented Ed with a bill for $2400.00! It gets worse. The following day, we flew together. After a couple of landings, the brakes failed again. The mechanic took a look and said he would bleed the brakes again. He did that and we got in the plane to find we still had no brakes. He threw up his hands and said he didn't know what else to do. No refund was offered. Now we get to our need for help.
Ed has decided to replace the brakes with Clevelands. He has located a shop about 60 miles away that will do the work. We need some brake power to leave HPN and fly to the airport where the work will be done. We want to install a replacement master cylinder, a Scott 4350, just for the ferry flight. Then we will remove that master cylinder and have the Cleveland conversion done. Does anyone have a working Scott 4350 we can use for about a week to get Ed's plane out of HPN and to the airport where the conversion will be done. As soon as we get to the airport, we will remove the borrowed Scott master cylinder and return it to you. We will gladly pay for shipping both ways and guarantee you will get your master cylinder back in a timely fashion and in the same condition as we receive it. You can email or call me at 551 358 2600.
Thanks
Glen Davis CFII Grumman Tiger N70GD 1946 Ercoupe N3103H www.ishootpictures.com 551 358 2600 |-----| _________(*)_________ ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm | |||
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