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Hydraulic lock?
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mnorman

Joined: 30 Nov 2010
Posts: 9

Posted: Thu Apr 18, 2013 11:41 pm Post subject: Hydraulic lock?

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

hess737(at)aol.com
Guest

Posted: Fri Apr 19, 2013 12:02 am Post subject: Hydraulic lock?

Broken master rod maybe??? Check no 4.

  

   Richard Hess

   President

   International Jets, Inc.

   Cell 404-964-4885

 

  

  

  --

richard.goode(at)russiana
Guest

Posted: Fri Apr 19, 2013 12:34 am Post subject: Hydraulic lock?

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

I’m currently in Sri Lanka but this Mail is working,and my local phone is

+94 779 132 160.

--

mnorman

Joined: 30 Nov 2010
Posts: 9

Posted: Fri Apr 19, 2013 1:44 am Post 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

Yakman

Joined: 04 Feb 2012
Posts: 10
Location: Auckland New Zealand

Posted: Fri Apr 19, 2013 2:12 am Post subject: 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: 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

Posted: Fri Apr 19, 2013 2:36 am Post subject: Hydraulic lock?

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

I’m currently in Sri Lanka but this Mail is working,and my local phone is

+94 779 132 160.

--

richard.goode(at)russiana
Guest

Posted: Fri Apr 19, 2013 3:02 am Post subject: 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 â€“ 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

Iâ€™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=================





-- 

This message has been scanned for viruses and 

dangerous content by MailScanner, and is 

believed to be clean. 

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  [quote][b]

mnorman

Joined: 30 Nov 2010
Posts: 9

Posted: Fri Apr 19, 2013 3:35 am Post subject: Re: Hydraulic lock?

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?

dsavarese0812(at)bellsout
Guest

Posted: Fri Apr 19, 2013 3:45 am Post subject: Hydraulic lock?

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

  --

dsavarese0812(at)bellsout
Guest

Posted: Fri Apr 19, 2013 3:57 am Post subject: 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 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===================



Â¦Â·â€º~â€°ÃÂ²,Ãžg(â€“Å Ã“M4Ã“GÃšqÃ¼Â¢ÃªÃ¢zÂ¹ÃžÃÃŠ.Â®'Â«8^aÂ©Å Ã‹Dâ„¢Â¨Â¥Å Ã®ï¿½,zÃ˜^1Â«kÂ¢xÅ“Â°Â¸Â¬Â´WÅ¡Â¶ÃªÃžÂ°Ã–Â¯Å ÂÂ¢Â»hnÂº0Â±Ãâ€¦Ã©Å¡Å¸"Ã¢Â²Ã›ÂÅ XÂâ€°Ã«,Â¹ÃˆZÂ°Â¸Â¬ÂµIÃ¿JÃ¦Ã¬rÂ¸Â©Â¶*'



    

 [quote][b]

gord(at)thedampub.ca
Guest

Posted: Fri Apr 19, 2013 4:08 am Post subject: Hydraulic lock?

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 [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 â€“ 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  

Iâ€™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=================

 

 

 

 

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á¢š,ÞªwfÈ¦È¦Û©0Â¦â²‡(óš¾¨ØªBâ²˜mÃŒ&jÚ¨',r5â«h.+-M $NECIÊ§éª[(jí¹‰íµ¦åº¸yhé¬ªÞ¾mß¢fâ²‡(mß¢fâ²‡(í·¬íº‹B{kÖ¹ä¡ªy2ç¨¯*.z.Ë©í±«m â¢²Ð)Ú†Û©0Â¦â²‡(í½¡í¾šâ®«bxmÃŒ&jÚ¨',rrí®¦î¶ª'Û½'k{í¹£í·¯á¶©    	  Quote: 	
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viperdoc(at)mindspring.co
Guest

Posted: Fri Apr 19, 2013 4:15 am Post subject: Hydraulic lock?

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

 

  

  

  --

richard.goode(at)russiana
Guest

Posted: Fri Apr 19, 2013 4:23 am Post subject: Hydraulic lock?

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

Iâ€™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 â€“ 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

Iâ€™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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  [quote][b]

viperdoc(at)mindspring.co
Guest

Posted: Fri Apr 19, 2013 4:25 am Post subject: 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]       v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}  <![endif]-->     st1\:*{behavior:url(#default#ieooui) }  <![endif]-->       <![endif]-->       <![endif]-->       

Am I to understand that it is advisable to do this procedure even if intake drains have been installed?Ã‚    

   

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 Ã¢â‚¬â€œ 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  

IÃ¢â‚¬â„¢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

 

 

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GeorgeCoy

Joined: 02 Dec 2010
Posts: 310

Posted: Fri Apr 19, 2013 4:54 am Post subject: Hydraulic lock?

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 â€Old Timersâ€ Â (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?Ã‚  

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 Ã¢â‚¬â€œ 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

IÃ¢â‚¬â„¢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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  [quote][b]

wlannon(at)shaw.ca
Guest

Posted: Fri Apr 19, 2013 8:39 am Post subject: Hydraulic lock?

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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[/b]   [quote][b]

dsavarese0812(at)bellsout
Guest

Posted: Fri Apr 19, 2013 9:06 am Post subject: Hydraulic lock?

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

Posted: Fri Apr 19, 2013 9:29 am Post subject: Hydraulic lock?

There is an ad on Barnstormers.com for a HS-6A engine and 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

 &gt==

  [quote][b]

bwade154(at)yahoo.com
Guest

Posted: Fri Apr 19, 2013 10:08 am Post subject: Hydraulic lock?

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 engine and 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

 

 

==

 

 

 


	




[quote]



-4>Un/Subscription,

ore:

 	  Quote: 	
		  Dralle, List Admin.


	


[b]

mark.bitterlich(at)navy.m
Guest

Posted: Fri Apr 19, 2013 10:17 am Post subject: Hydraulic lock?

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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