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mnorman
Joined: 30 Nov 2010 Posts: 9
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Posted: Thu Apr 18, 2013 11:41 pm Post subject: Hydraulic lock? |
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Hi All,
I think I may have suffered the dreaded hydraulic lock! My Nanchang had sat idle for about 4 or 5 months. Before attempting to start it I pulled the lower plugs (front ones only), got a fair bit of oil out and pulled through about 12 to 15 blades. When I tried to start her the prop turned about a half dozen times with a bit of smoke and a bang as it started to fire then abruptly stopped. Checked the prop and it was locked solid. Fearing the worst I pulled all the front plugs and intake drains but I was surprised that no oil came out. Also the prop was still locked in position, I had assumed once the plugs were out the lock would release. Can anyone tell me, does this sound like hydraulic lock? How come no oil came out after and why is it still locked up with the plugs out?
Also if it is a hydraulic lock is the motor repairable or throw it away?
Thanks for any ideas or info.
Mark
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hess737(at)aol.com Guest
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Posted: Fri Apr 19, 2013 12:02 am Post subject: Hydraulic lock? |
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Broken master rod maybe??? Check no 4.
Richard Hess
President
International Jets, Inc.
Cell 404-964-4885
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richard.goode(at)russiana Guest
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Posted: Fri Apr 19, 2013 12:34 am Post subject: Hydraulic lock? |
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I would be almost certain that it is locked because a connecting rod bent;
the piston moved further up the cylinder and the oil control ring jumped
out, and it is now preventing the piston going back down the cylinder.
Sorry, so not good news. But, the motor is repairable, but should be very
carefully checked in case there has been a major strain on some component.
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
Im currently in Sri Lanka but this Mail is working,and my local phone is
+94 779 132 160.
--
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mnorman
Joined: 30 Nov 2010 Posts: 9
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Posted: Fri Apr 19, 2013 1:44 am Post subject: Re: Hydraulic lock? |
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Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
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Yakman
Joined: 04 Feb 2012 Posts: 10 Location: Auckland New Zealand
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Posted: Fri Apr 19, 2013 2:12 am Post subject: Hydraulic lock? |
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Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew ParkNew Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com
Subject: Yak-List: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
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richard.goode(at)russiana Guest
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Posted: Fri Apr 19, 2013 2:36 am Post subject: Hydraulic lock? |
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Unfortunately, I think a number of people would remove the cylinder in
question, and confirm that what I have suggested is correct; remove a couple
of other cylinders which will give you access to the crankcase; remove the
bent rod, which you can do unless it is the master rod; replace the rod and,
probably, piston and reassemble.
My personal view is that a hydraulic lock imposes quite significant strains
on the crankshaft and possibly crankcase, and I personally would want to see
the crankshaft and case being removed; x-rayed/crack tested; check that it
is completely "true" it is of course only pressed together; carefully
check that none of the other cylinders were affected, and then, very
importantly, make sure that the new piston and connecting rod weigh within
half a gram of the others.
Richard
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
Im currently in Sri Lanka but this Mail is working,and my local phone is
+94 779 132 160.
--
| - The Matronics Yak-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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richard.goode(at)russiana Guest
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Posted: Fri Apr 19, 2013 3:02 am Post subject: Hydraulic lock? |
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The longer you leave the engine, the greater amount of oil is likely to migrate down from the tank. Also, I noted that he only pulled one lot of plugs; you can get oil in the intake tubes (but more likely with a tail – wheel aircraft); you can have oil stuck in the bottom of the inverted piston etc. After that length of time, I would turn it through at least 50/60 blades with the plugs removed. Also, it is a very good practice to make a note of the oil level on shutting down, and leave that in the aircraft. When you come back, you will then know how much oil has gone into the engine!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of andrew.park
Sent: Friday, April 19, 2013 3:40 PM
To: Yak
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
http://www.matronics========================<http://forums.matronics.com
_p; - List Contribution bsp; -Matt Dralle, List href="http://www.matronics.com/contribution">http://www.matronics.com/c=================
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ky螛"ͭZ+Ӎ4Ӈڱ稺wr꓅暐IQh锱롸ƭⲂⲑ^j۫zÚ(肇隟"ⲛX묹ȚIJ欲*'[1]!܄:0Zwڈ肇Eᢚ,ުwfȦȦ۩0¦ⲇ(تBⲘmÌ&jڨ',r5h.+-M $NECIʧ魪[(j庸yh鬪mߢfⲇ(mߢfⲇ(B{kֹ䡪y2稯*.z.˩m⢲Н)چ۩0¦ⲇ(⮫bxmÌ&jڨ',rr'۽'k{ᶩ
[quote][b]
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mnorman
Joined: 30 Nov 2010 Posts: 9
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Posted: Fri Apr 19, 2013 3:35 am Post subject: Re: Hydraulic lock? |
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Thanks for all the info Richard, its much appreciated. Is there an easy way to tell which piston is the problem? Also how do you think it would compare price wise between doing the work you have suggested and replacing the engine.
Anyone know the going price for a replacement HS-6A?
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dsavarese0812(at)bellsout Guest
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Posted: Fri Apr 19, 2013 3:45 am Post subject: Hydraulic lock? |
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Typically not a master rod. But definitely could be a bent link rod in probably #5 or #6 cylinder. If the link rod is bent, it will jam up against the sleeve of the cylinder.
Dennis
From: Richard Hess <hess737(at)aol.com>
To: yak-list(at)matronics.com
Sent: Fri, April 19, 2013 3:02:32 AM
Subject: Re: Hydraulic lock?
Broken master rod maybe??? Check no 4.
Richard Hess
President
International Jets, Inc.
Cell 404-964-4885
--
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dsavarese0812(at)bellsout Guest
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Posted: Fri Apr 19, 2013 3:57 am Post subject: Hydraulic lock? |
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Many CJ owners do not install intake drain kits on the Housai engines. Most likely because the Housai engine does not have intake plugs on the #4,5 and 6 cylinders as does the M14 engine. Oil does collect in the intake tubes and it does thicken while it lays in the intake tubes. If a glob of oil gets sucked into the cylinder, it could be enough oil to cause the dreaded hydraulic lock and also cause a link (connecting) rod to bend.
Therefore, one of the ways to help prevent hydraulic lock, besides pulling the plugs and pulling through, is to install an intake drain kit. Leave the intake drain kit open when the aircraft is parked. During the preflight prep, with the intake drain open, pump a few shots of prime and watch for the fuel to eventually run CLEAR out of the intake drain. This helps flush the oil from the intake tubes. Then pull the blades with the intake drain open.
Also, because the airplane sits at a slightly nose high attitude on the ground, it is always recommended to pull the rear spark plugs because the oil typically rests at the rear of the cylinder due to the nose high attitude. Most importantly, pull the rear plugs from 4, 5, and 6. Even #7 can't hurt.
Dennis
From: andrew.park <andrew.park(at)xtra.co.nz>
To: Yak <yak-list(at)matronics.com>
Sent: Fri, April 19, 2013 5:13:09 AM
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew ParkNew Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
http://www.matronics.com/Naviga= lable via the Web ef="http://forums.matronics.com">http://forums.matronics.comhttp://www.matronics.com/co===================
¦·›~‰í²,Þg(–ŠÓM4ÓGÚqü¢êâz¹ÞÁÊ.®'«8^a©ŠËD™¨¥Šî�,zØ^1«k¢xœ°¸¬´Wš¶êÞ°Ö¯Š¢»hnº0±í…隟"â²ÛŠX‰ë,¹ÈZ°¸¬µIÿJæìr¸©¶*'
[quote][b]
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gord(at)thedampub.ca Guest
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Posted: Fri Apr 19, 2013 4:08 am Post subject: Hydraulic lock? |
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Am I to understand that it is advisable to do this procedure even if intake drains have been installed?
Thanks Richard
Gordon Price
Canada
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Richard Goode
Sent: April-19-13 7:00 AM
To: yak-list(at)matronics.com
Subject: RE: Re: Hydraulic lock?
The longer you leave the engine, the greater amount of oil is likely to migrate down from the tank. Also, I noted that he only pulled one lot of plugs; you can get oil in the intake tubes (but more likely with a tail – wheel aircraft); you can have oil stuck in the bottom of the inverted piston etc. After that length of time, I would turn it through at least 50/60 blades with the plugs removed. Also, it is a very good practice to make a note of the oil level on shutting down, and leave that in the aircraft. When you come back, you will then know how much oil has gone into the engine!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of andrew.park
Sent: Friday, April 19, 2013 3:40 PM
To: Yak
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
<bnbsp; - The Yak-List Email Forum href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics========================<http://forums.matronics.com
_p; - List Contribution bsp; -Matt Dralle, List href="http://www.matronics.com/contribution">http://www.matronics.com/c=================
--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.
ky螛"ͭZ+Ӎ4Ӈڱ稺wr꓅暐IQh锱롸ƭⲂⲑ^j۫zÚ(肇隟"ⲛX묹ȚIJ欲*'[1]!܄:0Zwڈ肇E
ᢚ,ުwfȦȦ۩0¦ⲇ(تBⲘmÌ&jڨ',r5h.+-M $NECIʧ魪[(j庸yh鬪mߢfⲇ(mߢfⲇ(B{kֹ䡪y2稯*.z.˩m ⢲Н)چ۩0¦ⲇ(⮫bxmÌ&jڨ',rr'۽'k{ᶩ Quote: | [b]http://www.matronics.com/Navigator?Yak-List[b] | 0123456789
[quote][b]
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viperdoc(at)mindspring.co Guest
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Posted: Fri Apr 19, 2013 4:15 am Post subject: Hydraulic lock? |
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As well as what Richard said. The 5th ring counting from the top of the piston, with the connecting rod bent, on down stroke slipped out of the neck of the cylinder. On up stroke that ring jams on the throat of the cylinder locking the engine.
Doc
Sent from my iPad
On Apr 19, 2013, at 6:43 AM, "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
[quote]Typically not a master rod. But definitely could be a bent link rod in probably #5 or #6 cylinder. If the link rod is bent, it will jam up against the sleeve of the cylinder.
Dennis
From: Richard Hess <hess737(at)aol.com (hess737(at)aol.com)>
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Sent: Fri, April 19, 2013 3:02:32 AM
Subject: Re: Hydraulic lock?
Broken master rod maybe??? Check no 4.
Richard Hess
President
International Jets, Inc.
Cell 404-964-4885
--
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richard.goode(at)russiana Guest
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Posted: Fri Apr 19, 2013 4:23 am Post subject: Hydraulic lock? |
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If you have left it for several months, in my view, definitely yes.
Richard
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of gord
Sent: Friday, April 19, 2013 5:35 PM
To: yak-list(at)matronics.com
Subject: RE: Re: Hydraulic lock?
Am I to understand that it is advisable to do this procedure even if intake drains have been installed?
Thanks Richard
Gordon Price
Canada
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of Richard Goode
Sent: April-19-13 7:00 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: RE: Re: Hydraulic lock?
The longer you leave the engine, the greater amount of oil is likely to migrate down from the tank. Also, I noted that he only pulled one lot of plugs; you can get oil in the intake tubes (but more likely with a tail – wheel aircraft); you can have oil stuck in the bottom of the inverted piston etc. After that length of time, I would turn it through at least 50/60 blades with the plugs removed. Also, it is a very good practice to make a note of the oil level on shutting down, and leave that in the aircraft. When you come back, you will then know how much oil has gone into the engine!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of andrew.park
Sent: Friday, April 19, 2013 3:40 PM
To: Yak
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
<bnbsp; - The Yak-List Email Forum href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics========================<http://forums.matronics.com
_p; - List Contribution bsp; -Matt Dralle, List href="http://www.matronics.com/contribution">http://www.matronics.com/c=================
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This message has been scanned for viruses and
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ᢚ,ުwfȦȦ۩0¦ⲇ(تBⲘmÌ&jڨ',r5h.+-M $NECIʧ魪[(j庸yh鬪mߢfⲇ(mߢfⲇ(B{kֹ䡪y2稯*.z.˩m⢲Н)چ۩0¦ⲇ(⮫bxmÌ&jڨ',rr'۽'k{ᶩ 012345678901234567
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[quote][b]
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viperdoc(at)mindspring.co Guest
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Posted: Fri Apr 19, 2013 4:25 am Post subject: Hydraulic lock? |
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The YAK maintenance manual calls for this if the engine sits idle for thirty days. "Drive out the intake plugs and spark plugs". They also recommend that if the engine sits longer than five days to pull blades periodically to clear any accumulated oil.
Doc
Sent from my iPad
On Apr 19, 2013, at 7:04 AM, "gord" <gord(at)thedampub.ca (gord(at)thedampub.ca)> wrote:
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Am I to understand that it is advisable to do this procedure even if intake drains have been installed?Â
Thanks Richard
Gordon Price
Canada
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of Richard Goode
Sent: April-19-13 7:00 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: RE: Re: Hydraulic lock?
The longer you leave the engine, the greater amount of oil is likely to migrate down from the tank. Also, I noted that he only pulled one lot of plugs; you can get oil in the intake tubes (but more likely with a tail – wheel aircraft); you can have oil stuck in the bottom of the inverted piston etc. After that length of time, I would turn it through at least 50/60 blades with the plugs removed. Also, it is a very good practice to make a note of the oil level on shutting down, and leave that in the aircraft. When you come back, you will then know how much oil has gone into the engine!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of andrew.park
Sent: Friday, April 19, 2013 3:40 PM
To: Yak
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
<bnbsp; - The Yak-List Email Forum href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics========================<http://forums.matronics.com
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GeorgeCoy
Joined: 02 Dec 2010 Posts: 310
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Posted: Fri Apr 19, 2013 4:54 am Post subject: Hydraulic lock? |
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Well guys, We parked our DC3 last October and carefully installed drip pans. In March when it was time to get her going again, we removed all the bottom plugs pulled her through then started it up without the bottom plugs installed. Ran funny and shot a lot of oil across the ramp, but no hydro-lock. I learned this trick from some ”Old Timers” (as I am approaching 70 myself, that means anyone who is older than me!)
George
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Roger Kemp M.D.
Sent: Friday, April 19, 2013 8:23 AM
To: yak-list(at)matronics.com
Subject: Re: Re: Hydraulic lock?
The YAK maintenance manual calls for this if the engine sits idle for thirty days. "Drive out the intake plugs and spark plugs". They also recommend that if the engine sits longer than five days to pull blades periodically to clear any accumulated oil.
Doc
Sent from my iPad
On Apr 19, 2013, at 7:04 AM, "gord" <gord(at)thedampub.ca (gord(at)thedampub.ca)> wrote:
Quote: |
Am I to understand that it is advisable to do this procedure even if intake drains have been installed?Â
Thanks Richard
Gordon Price
Canada
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of Richard Goode
Sent: April-19-13 7:00 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: RE: Re: Hydraulic lock?
The longer you leave the engine, the greater amount of oil is likely to migrate down from the tank. Also, I noted that he only pulled one lot of plugs; you can get oil in the intake tubes (but more likely with a tail – wheel aircraft); you can have oil stuck in the bottom of the inverted piston etc. After that length of time, I would turn it through at least 50/60 blades with the plugs removed. Also, it is a very good practice to make a note of the oil level on shutting down, and leave that in the aircraft. When you come back, you will then know how much oil has gone into the engine!
Richard Goode
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
United Kingdom
Tel: +94 (0) 81 241 5137 (Sri Lanka)
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
I’m currently in Sri Lanka but this Mail is working,and my local phone is +94 779 132 160.
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of andrew.park
Sent: Friday, April 19, 2013 3:40 PM
To: Yak
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au (mark(at)albanyproperty.com.au)>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
<bnbsp; - The Yak-List Email Forum href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics========================<http://forums.matronics.com
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wlannon(at)shaw.ca Guest
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Posted: Fri Apr 19, 2013 8:39 am Post subject: Hydraulic lock? |
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Hi Dennis;
The Huosai does indeed have intake drain plugs on 4, 5 & 6. These are identical to the ones on the EARLY M14P with one major exception. The plug bosses on the Huosai intake pipes are welded directly to the pipe with no re-inforcing doubler as you will find on the M14P.
As a result the addition of a drain system introduces the possibility of cracking around the boss unless the pipes are modified to the same standard as the M14P.
Cheers;
Walt
From: A. Dennis Savarese (dsavarese0812(at)bellsouth.net)
Sent: Friday, April 19, 2013 4:54 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Re: Hydraulic lock?
Many CJ owners do not install intake drain kits on the Housai engines. Most likely because the Housai engine does not have intake plugs on the #4,5 and 6 cylinders as does the M14 engine. Oil does collect in the intake tubes and it does thicken while it lays in the intake tubes. If a glob of oil gets sucked into the cylinder, it could be enough oil to cause the dreaded hydraulic lock and also cause a link (connecting) rod to bend.
Therefore, one of the ways to help prevent hydraulic lock, besides pulling the plugs and pulling through, is to install an intake drain kit. Leave the intake drain kit open when the aircraft is parked. During the preflight prep, with the intake drain open, pump a few shots of prime and watch for the fuel to eventually run CLEAR out of the intake drain. This helps flush the oil from the intake tubes. Then pull the blades with the intake drain open.
Also, because the airplane sits at a slightly nose high attitude on the ground, it is always recommended to pull the rear spark plugs because the oil typically rests at the rear of the cylinder due to the nose high attitude. Most importantly, pull the rear plugs from 4, 5, and 6. Even #7 can't hurt.
Dennis
From: andrew.park <andrew.park(at)xtra.co.nz>
To: Yak <yak-list(at)matronics.com>
Sent: Fri, April 19, 2013 5:13:09 AM
Subject: Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use for 4-5 months or is this just a coincedence. If Mark has pulled thru and pulled plugs, what more should be done?
Andrew Park New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com
Subject: Re: Hydraulic lock?
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au>
Hi Richard,
If it is a bent rod as you've suggested, what work is required to repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
ttp://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Naviga= lable via the Web ef="http://forums.matronics.com">http://forums.matronics.comhttp://www.matronics.com/co===================
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dsavarese0812(at)bellsout Guest
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Posted: Fri Apr 19, 2013 9:06 am Post subject: Hydraulic lock? |
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Ahhh....learn something new every day. The reason I said what I did was
because of the many CJ's I have seen, very rarely was there any intake
drains installed. Now I understand why.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 4/19/2013 11:36 AM, Walter Lannon wrote:
Quote: | Hi Dennis;
The Huosai does indeed have intake drain plugs on 4, 5 & 6. These are
identical to the ones on the EARLY M14P with one major exception. The
plug bosses on the Huosai intake pipes are welded directly to the pipe
with no re-inforcing doubler as you will find on the M14P.
As a result the addition of a drain system introduces the possibility
of cracking around the boss unless the pipes are modified to the same
standard as the M14P.
Cheers;
Walt
*From:* A. Dennis Savarese <mailto:dsavarese0812(at)bellsouth.net>
*Sent:* Friday, April 19, 2013 4:54 AM
*To:* yak-list(at)matronics.com <mailto:yak-list(at)matronics.com>
*Subject:* Re: Re: Hydraulic lock?
Many CJ owners do not install intake drain kits on the Housai engines.
Most likely because the Housai engine does not have intake plugs on
the #4,5 and 6 cylinders as does the M14 engine. Oil does collect in
the intake tubes and it does thicken while it lays in the intake
tubes. If a glob of oil gets sucked into the cylinder, it could be
enough oil to cause the dreaded hydraulic lock and also cause a link
(connecting) rod to bend.
Therefore, one of the ways to help prevent hydraulic lock, besides
pulling the plugs and pulling through, is to install an intake drain
kit. Leave the intake drain kit open when the aircraft is parked.
During the preflight prep, with the intake drain open, pump a few
shots of prime and watch for the fuel to eventually run CLEAR out of
the intake drain. This helps flush the oil from the intake tubes. Then
pull the blades with the intake drain open.
Also, because the airplane sits at a slightly nose high attitude on
the ground, it is always recommended to pull the rear spark plugs
because the oil typically rests at the rear of the cylinder due to the
nose high attitude. Most importantly, pull the rear plugs from 4, 5,
and 6. Even #7 can't hurt.
Dennis
------------------------------------------------------------------------
*From:* andrew.park <andrew.park(at)xtra.co.nz>
*To:* Yak <yak-list(at)matronics.com>
*Sent:* Fri, April 19, 2013 5:13:09 AM
*Subject:* Re: Re: Hydraulic lock?
Richard, do you think this problem has been caused by the lack of use
for 4-5 months or is this just a coincedence. If Mark has pulled thru
and pulled plugs, what more should be done?
Andrew Park
New Zealand
-------- Original message --------
From: mnorman <mark(at)albanyproperty.com.au>
Date: 19/04/2013 9:44 PM (GMT+12:00)
To: yak-list(at)matronics.com
Subject: Re: Hydraulic lock?
Hi Richard,
If it is a bent rod as you've suggested, what work is required to
repair the likely damage?
Thanks
Mark
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398935#398935
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tmckeon79(at)hotmail.com Guest
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Posted: Fri Apr 19, 2013 9:29 am Post subject: Hydraulic lock? |
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There is an ad on Barnstormers.com for a HS-6A engineand exhaust for $3,500. If I were you I'd jump on that right away, youwon't find a better deal. I had basically the same thing happento me a few months ago. I'm still dealing with it.
Quote: | Subject: Re: Hydraulic lock?
From: mark(at)albanyproperty.com.au
Date: Fri, 19 Apr 2013 04:35:10 -0700
To: yak-list(at)matronics.com
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au>
Thanks for all the info Richard, its much appreciated. Is there an easy way to tell which piston is the problem? Also how do you think it would compare price wise between doing the work you have suggested and replacing the engine.
Anyone know the going price for a replacement HS-6A?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398939#398939
>==
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bwade154(at)yahoo.com Guest
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Posted: Fri Apr 19, 2013 10:08 am Post subject: Hydraulic lock? |
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Mark if you would like to know which piston it is just put a rod in through the spark plug hole longest one wins pull cylinder.
Bill
From: Thomas McKeon <tmckeon79(at)hotmail.com>
To: "yak-list(at)matronics.com" <yak-list(at)matronics.com>
Sent: Friday, April 19, 2013 1:27 PM
Subject: RE: Re: Hydraulic lock?
There is an ad on Barnstormers.com for a HS-6A engineand exhaust for $3,500. If I were you I'd jump on that right away, you won't find a better deal. I had basically the same thing happen to me a few months ago. I'm still dealing with it.
Quote: | Subject: Re: Hydraulic lock?
From: mark(at)albanyproperty.com.au
Date: Fri, 19 Apr 2013 04:35:10 -0700
To: yak-list(at)matronics.com
--> Yak-List message posted by: "mnorman" <mark(at)albanyproperty.com.au>
Thanks for all the info Richard, its much appreciated. Is there an easy way to tell which piston is the problem? Also how do you think it would compare price wise between doing the work you have suggested and replacing the engine.
Anyone know the going price for a replacement HS-6A?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=398939#398939
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mark.bitterlich(at)navy.m Guest
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Posted: Fri Apr 19, 2013 10:17 am Post subject: Hydraulic lock? |
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The M-14 Engine has slightly different "stroke" lengths, and I would
guess so would the Housai. You cannot rely on that method all the time.
Just sayin. It sounds good in theory, and with a V-8 Chevy it would
work. Not so this engine.
Mark
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