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thuqbah1(at)yahoo.com
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 Posted: Mon Oct 04, 2010 6:39 am Post subject: Checking for leaks from F/R gear actuators |
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The leakage on my 52 has gone from a couple of days to one day from full to almost zero after removing and hydroing both air tanks.
I can't detect any leaks on the firewall or tank fittings. I guess the next suspect area is the gear selectors. What is the best way to detect a leak from these valves? I am about to do a gear retraction test on jacks and will use the front and rear emergency retraction as well as normal up/down.
Regards,
Scott Miller N6203Y
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george.coy(at)gmail.com
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| Posted: Mon Oct 04, 2010 6:49 am Post subject: Checking for leaks from F/R gear actuators |
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It is probably one of the check valves.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Scott Miller
Sent: Monday, October 04, 2010 10:26 AM
To: yak-list(at)matronics.com
Subject: Checking for leaks from F/R gear actuators
The leakage on my 52 has gone from a couple of days to one day from full to almost zero after removing and hydroing both air tanks.
I can't detect any leaks on the firewall or tank fittings. I guess the next suspect area is the gear selectors. What is the best way to detect a leak from these valves? I am about to do a gear retraction test on jacks and will use the front and rear emergency retraction as well as normal up/down.
Regards,
Scott Miller N6203Y
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dsavarese0812(at)bellsout
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| Posted: Mon Oct 04, 2010 7:34 am Post subject: Checking for leaks from F/R gear actuators |
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Scott,
The only time the any air will leak from the gear selectors is with the main air valve turned on. If the air is leaking down in the tanks with the main and emergency air valves turned off, the problem is very likely the O-ring seals under the large nuts on the top of the air tanks where the flare fittings are screwed into. Contact Jill at M14P for the correct O ring for the tank. Without the proper O ring, the tanks will leak down rather quickly. Basically, with the air valves closed, the leaks have to be between the air valve and the bottle with one exception.
Remove the external air fill port cover and spray some soapy water on the hole. If there is air leaking out, the soapy water will bubble up. If both air bottles are leaking down, it is possible you have two check valves hanging up. One is on the inside of the fuselage right behind the external air fill port. This one is for the emergency air tank. The other check valve is on the firewall and is on the left side of the T where the pop off valve is. This is the check valve for the main air bottle.
If you need more help, just let me know.
Dennis
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