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M14 P Generator delivering low voltage

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tigeryak18t

Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE

Posted: Mon Mar 01, 2010 11:20 am Post subject: M14 P Generator delivering low voltage

Hello all,



I have a few questions concerning a 52 that has been hangared outside and not running at all during three years.

Here are some topics on which our lituanian mechanis has raised our attention and I don't know what to think about these or what to do to correct these topics...

  

1 Engine cylinder No.2 Exhaust is loose;

 2 Several cylinders are loosing oil from rocker covers;

 3 Generator low charging 26V; (???)

  

  What to think about the engine compression test:

 

  1. 80/75

 2. 80/72

 3. 80/74

 4. 80/76

 5. 80/72

 6. 80/70

 7. 80/73

 8. 80/74

 9. 80/77

 

Hope this is not to much questions but I must admit that for some (generator and compression) I really don't know what to think.

Could anyone please help me 



thanks a lot and have a good day

  

Kind regards



Didier



-- 

Didier BLOUZARD

didier.blouzard(at)gmail.com (didier.blouzard(at)gmail.com)

 0624243672

  [quote][b]

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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing

kregg(at)balancemyprop.co
Guest

Posted: Mon Mar 01, 2010 3:07 pm Post subject: M14 P Generator delivering low voltage

Oh my God…………….  I would remove that engine immediately and in a 400HP M14PF………………………..  

   

Just kidding.  As far as Yaks go if you only have these squawks , they are so minor they are hardly worth mentioning.  

   

The Compressions are ok.  They will probably improve on the engine has been flown a bit.  

   

Kregg   

   

   

Victory Aero LLC  

2502 John Montgomery Dr.  

San Jose, CA 95148  

408-836-5122  

www.balancemyprop.com  

     

From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Didier Blouzard

 Sent: Monday, March 01, 2010 11:12 AM

 To: yak-list(at)matronics.com

 Subject: M14 P Generator delivering low voltage  

  

   

Hello all,

 

 I have a few questions concerning a 52 that has been hangared outside and not running at all during three years.

 Here are some topics on which our lituanian mechanis has raised our attention and I don't know what to think about these or what to do to correct these topics...

 

 1 Engine cylinder No.2 Exhaust is loose;

 2 Several cylinders are loosing oil from rocker covers;

 3 Generator low charging 26V; (???)

 

   What to think about the engine compression test:

 

 1. 80/75

 2. 80/72

 3. 80/74

 4. 80/76

 5. 80/72

 6. 80/70

 7. 80/73

 8. 80/74

 9. 80/77

 

 

 

 Hope this is not to much questions but I must admit that for some (generator and compression) I really don't know what to think.

 Could anyone please help me 

 

 thanks a lot and have a good day

 

 Kind regards

 

 Didier

  

 -- 

 Didier BLOUZARD

 didier.blouzard(at)gmail.com (didier.blouzard(at)gmail.com)

 0624243672   	  Quote: 	
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       [quote][b]

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dsavarese0812(at)bellsout
Guest

Posted: Mon Mar 01, 2010 3:56 pm Post subject: M14 P Generator delivering low voltage

Didier,

 #1 - the exhaust collar and clamps can be tightened to fix  this

 #2 - replace the rocker cover gaskets with new gaskets -  and easy fix

 #3 - adjust the rheostat next to the front cockpit flap handle  to read 28V at 42% or more RPM while pressing the button in on the amp/volt  meter.

  

 Compressions all look very good.  Using a bore scope, it  would be a good idea to look inside some of the cylinders to see how much rust  has built up above the top of the piston when it is on TDC.  It will be  obvious.  There could also be internal corrosion on the  bearings which no one can see without disassembling the engine.   Unless the engine was properly preserved, I would exercise caution  regarding flying behind this engine without a thorough internal  inspection.  You may want to call Termikas and speak to their engine shop  manager and get his opinion since they see many, engines.  Some of which  have probably been idle for 3 or more years too. 

  

 The other things to be concerned about is the pneumatic system  components.  Particularly the air bottles.  They need to be removed,  cleaned and thoroughly inspected and pressure tested.  After 3 years of  inactivity, you can count on corrosion inside the undercarriage actuators  (3); the uplock actuators (3); the flap actuator (1); the undercarriage  selectors in both cockpits; the flap selectors in both cockpits; the air start  valve just in front of your left foot on the back side of the firewall; all of  the check valves should be overhauled as well.  All of the flexible hoses  should be replaced.  You will need to remove the bungee cords from the  canopies.  They will be dry-rotted.  Many of the bolts that secure the  tail sections to the airframe are probably serious rusted.  The elevator  trim roller should be carefully examined.  The control surface fabric most  likely will need replacing.  Look also at the canopy glass and the  rollers/bearings the canopies roll on.  All the bearings on the ailerons  including the inboard aileron bearings should be replaced as these will very  likely be rusted/corroded.  The undercarriage legs seals are probably in  poor shape as well.  Brake bladders might also be  questionable.

  

 These are just a few of the things that immediately come to  mind.   I'm sure others on the list can contribute 

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cjpilot710(at)aol.com
Guest

Posted: Mon Mar 01, 2010 4:14 pm Post subject: M14 P Generator delivering low voltage

If I am not mistaken, to see if a cylinder needs a ring job, you take the average of the pressures and any cylinder that is more than 10% of the average needs either rings or valve seats done.  If true than your average is 73.6/80 which means your lowest cylinder would need to be lower than 66/80.

 

   Maybe you real mechanics out there can verify that?

    

   Jim "Pappy" Goolsby

 

   

 

 

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tigeryak18t

Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE

Posted: Wed Mar 03, 2010 3:05 pm Post subject: M14 P Generator delivering low voltage

Dennis, Jim and all the other contributors,



jesus that's a lot of job. But the good news is that the plane is still overhaulable.... (is this an americafrench word????)

I will have all the actutors overhauled and all the hoses (by Ricardas). Then I will setup tha alternator by myself (Thanks a lot Dennis) and certainly have all the bearings changed. Dennis I will need these overhaul kit for the check valves. The one you sent worked perfectly well.

  The only job that looks prety difficult is the bottles inspection and overhaul.

But a thourough inspection will be done. And you are right the canopy and the bungies are really in a poor shape. This I will do also.

  Aileron bearings and tail inspection also will be done.

THEN with the agreement of FLA (Andrei Gloukhov) this beautifull bird will fly again.Any advice is still very welcome.

Dennis I will come back to you soon.

  

Thanks a lot guys and a good evening (on this side of the world)



kind rega



2010/3/1 A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)>

  [quote]       Didier,

 #1 - the exhaust collar and clamps can be tightened to fix  this

 #2 - replace the rocker cover gaskets with new gaskets -  and easy fix

 #3 - adjust the rheostat next to the front cockpit flap handle  to read 28V at 42% or more RPM while pressing the button in on the amp/volt  meter.

  

 Compressions all look very good.  Using a bore scope, it  would be a good idea to look inside some of the cylinders to see how much rust  has built up above the top of the piston when it is on TDC.  It will be  obvious.  There could also be internal corrosion on the  bearings which no one can see without disassembling the engine.   Unless the engine was properly preserved, I would exercise caution  regarding flying behind this engine without a thorough internal  inspection.  You may want to call Termikas and speak to their engine shop  manager and get his opinion since they see many, engines.  Some of which  have probably been idle for 3 or more years too. 

  

 The other things to be concerned about is the pneumatic system  components.  Particularly the air bottles.  They need to be removed,  cleaned and thoroughly inspected and pressure tested.  After 3 years of  inactivity, you can count on corrosion inside the undercarriage actuators  (3); the uplock actuators (3); the flap actuator (1); the undercarriage  selectors in both cockpits; the flap selectors in both cockpits; the air start  valve just in front of your left foot on the back side of the firewall; all of  the check valves should be overhauled as well.  All of the flexible hoses  should be replaced.  You will need to remove the bungee cords from the  canopies.  They will be dry-rotted.  Many of the bolts that secure the  tail sections to the airframe are probably serious rusted.  The elevator  trim roller should be carefully examined.  The control surface fabric most  likely will need replacing.  Look also at the canopy glass and the  rollers/bearings the canopies roll on.  All the bearings on the ailerons  including the inboard aileron bearings should be replaced as these will very  likely be rusted/corroded.  The undercarriage legs seals are probably in  poor shape as well.  Brake bladders might also be  questionable.

  

 These are just a few of the things that immediately come to  mind.   I'm sure others on the list can contribute 

 [quote]   ---

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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing

dsavarese0812(at)bellsout
Guest

Posted: Wed Mar 03, 2010 3:23 pm Post subject: M14 P Generator delivering low voltage

Tell Andrei that Dennis says hello and I look forward to  seeing him again in the near future.

 Dennis

  

 [quote]   ---

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tigeryak18t

Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE

Posted: Wed Mar 03, 2010 5:55 pm Post subject: M14 P Generator delivering low voltage

I'll tell him. I wil certainly eat with him this friday

I'll give him your regards

Didier



Didier Blouzard06 24 24 36 72

Le 4 mars 2010 Ã  00:09, "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> a Ã©crit :



[quote]  Tell Andrei that Dennis says hello and I look forward to  seeing him again in the near future.

 Dennis

  

 [quote]   ---

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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing

talew(at)bellsouth.net
Guest

Posted: Wed Mar 03, 2010 6:20 pm Post subject: M14 P Generator delivering low voltage

From: Didier.blouzard <didier.blouzard(at)gmail.com>

To: "yak-list(at)matronics.com" <yak-list(at)matronics.com>

Sent: Wed, March 3, 2010 7:10:54 PM

Subject: Re: M14 P Generator delivering low voltage



 I'll tell him. I wil certainly eat with him this friday

 I'll give him your regards

 



 Didier

 

Didier Blouzard  06 24 24 36 72



 

Le 4 mars 2010 à 00:09, "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> a écrit :

 

 [quote]  Tell Andrei that Dennis says hello and I look forward to seeing him again in the near future.

 Dennis

  

 [quote] ---

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