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  #11  
Old 12-31-2015, 11:12 AM
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az_gila az_gila is offline
 
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Quote:
Originally Posted by jetjok View Post
In addition to excellent advice already stated by Vic, I wanted to point out that Lycoming SI 480E addresses checking the suction screen.
As I seem to be not clever enough to post the .pdf link, I have added the germane section. There is more info included in the document.
...
To help you out, the entire document...

http://www.lycoming.com/Portals/0/te...Inspection.pdf
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  #12  
Old 01-01-2016, 08:41 AM
T.O.Craig T.O.Craig is offline
 
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Default Location

Might sound stupid, but my 540 has not run yet, and I am not at the airport, but where is the pre-filter located????
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  #13  
Old 01-01-2016, 08:50 AM
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If its a parallel valve 540, then the screen is probably at the rear of the sump, offset to the right. Looks like a drain plug. If it is an angle valve, the screen is likely located on the left side wall of the sump.
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  #14  
Old 01-01-2016, 09:00 AM
T.O.Craig T.O.Craig is offline
 
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Thanks so much.. I will look for it this afternoon
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  #15  
Old 01-01-2016, 05:09 PM
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Default How well does that engine run?

I have to ask...with those compression numbers, does it use a lot of oil, and does it make expected power? Rick
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  #16  
Old 01-01-2016, 05:51 PM
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Quote:
Originally Posted by vic syracuse View Post
I come across many RV's whose operators forget to check the oil screen on the engine. It should be checked at least once per year during the annual or whenever the internal health of the engine is in question. Here is a picture of one I removed from an RV10 yesterday that should drive the message home. IO-540 with 10:1 pistons and only 600 hours. I don't know when the screen was last checked, but clearly there is lots of blowby. All of the chunks were carbon, the screen was about 50% blocked, with one cylinder at 48/80 and 54/80 and all of the leakage going by the rings.


From what I remember, the pickup screen in the oil sump should have the dirt on the outside. Is this the filter on the back of the engine? (screen instead of spin-on filter) If the photo is of the pickup screen, what was found in the spin-on or filter on the accessory case?

If this is the screen on the accessory case (instead of spin-on filter) shouldn't the crud be on the outside of the screen? IIRC, the oil flow is from the outside to the inside of the filter.
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  #17  
Old 01-01-2016, 06:15 PM
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This is the suction screen, in the sump. And it flows from inside to out.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

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1984 L39C
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  #18  
Old 01-02-2016, 03:23 AM
penguin penguin is offline
 
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Quote:
Originally Posted by Toobuilder View Post
This is the suction screen, in the sump. And it flows from inside to out.
See page 3 of this link Christen Oil Sump Mods
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  #19  
Old 01-02-2016, 05:44 AM
N427EF N427EF is offline
 
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Default Crush washer part#

Does anyone have the part number for the
oil screen crush washer?
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  #20  
Old 01-02-2016, 06:09 AM
vic syracuse vic syracuse is offline
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Default AN900-16

Is the part number for the suction screen gasket referenced in this thread. Yes, the oil flows from the inside to the outside. Here's a picture of the outside of the screen. Yes, there were particles in the filter, albeit much finer and smaller.



It did not impress me as making rated power, either. It is stamped at 317 HP by Lyon. Personally, I doubt that. But I figured the takeoff would be exhilarating if it truly had that much difference in HP. However, having just performed a top overhaul on mine and being impressed with the pickup in take-off acceleration and cruise speed, it actually seemed less than mine.
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