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Housai Oil Pressure

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727gs

Joined: 11 May 2016
Posts: 16
Location: Wadsworth

Posted: Sat Aug 26, 2017 9:58 am Post subject: Housai Oil Pressure

After starting my stock CJ-6, I noticed that the oil pressure needle on the triple gauge would bounce from normal pressure to 0 and back very quickly, like there was an electrical ground or connection that was intermittent. No real pattern to it and it went away when the power was advanced. All other indications were normal. I reseated the canon plugs on the back of the instrument to no avail and have no idea where the oil pressure probe on the engine is located.



Any ideas? Thanks in advance.



Steve Jones

near Chicago

_________________
Steve near Chicago

dsavarese0812(at)bellsout
Guest

Posted: Sat Aug 26, 2017 10:28 am Post subject: Housai Oil Pressure

Two things

- Did you check to see if you have the same indication in the rear cockpit?

- The oil pressure senders are on the back side of the firewall.  Look for two round devices about 2 1/4" in diameter, painted brown on the side facing away from the firewall.  Those are the oil pressure senders.



I'd recommend removing the inspection cover on the port side between the instrument panel and the firewall to see them.

Dennis



       From: 727gs <727gs(at)att.net>

 To: yak-list(at)matronics.com 

 Sent: Saturday, August 26, 2017 1:59 PM

 Subject: Housai Oil Pressure

  

 

--> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>



After starting my stock CJ-6, I noticed that the oil pressure needle on the triple gauge would bounce from normal pressure to 0 and back very quickly, like there was an electrical ground or connection that was intermittent. No real pattern to it and it went away when the power was advanced. All other indications were normal. I reseated the canon plugs on the back of the instrument to no avail and have no idea where the oil pressure probe on the engine is located.



Any ideas? Thanks in advance.



Steve Jones



near Chicago



--------



Steve near Chicago



Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=472217#472217



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Clouddog

Joined: 02 Jun 2016
Posts: 117
Location: Lebanon, TN

Posted: Sat Aug 26, 2017 1:36 pm Post subject: Housai Oil Pressure

Steve, inside the engine compartment on the right side you will see several cannon plugs. My recommendation is u remove them one at a time, and hose them down with an electrical contact spray cleaner. Very few engines are super clean. Over the years oil works itself into cannon plugs and crazy things happen. I had issues with my tach generator plug and a bouncy rpm gage until I cleaned out the oil. Give it a try, can't hurt.



Greg "Clouddog" Wrobel

AA Retired

On Aug 26, 2017 1:08 PM, "727gs" <727gs(at)att.net (727gs(at)att.net)> wrote: 	  Quote: 	
		  --> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>

 

 After starting my stock CJ-6, I noticed that the oil pressure needle on the triple gauge would bounce from normal pressure to 0 and back very quickly, like there was an electrical ground or connection that was intermittent. No real pattern to it and it went away when the power was advanced. All other indications were normal. I reseated the canon plugs on the back of the instrument to no avail and have no idea where the oil pressure probe on the engine is located.

 

 Any ideas? Thanks in advance.

 

 Steve Jones

 near Chicago

 

 --------

 Steve near Chicago

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=472217#472217

 

 

 

 

 

 

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dsavarese0812(at)bellsout
Guest

Posted: Sat Aug 26, 2017 2:03 pm Post subject: Housai Oil Pressure

But the oil pressure sender cannon plugs are behind the firewall.  I seriously doubt oil would be getting into those cannon plug connectors.  What is in the engine compartment is the oil pressure line to the oil pump.

Dennis

       From: Greg Wrobel <clouddog22(at)gmail.com>

 To: yak-list(at)matronics.com 

 Sent: Saturday, August 26, 2017 5:37 PM

 Subject: Re: Yak-List: Housai Oil Pressure

Steve, inside the engine compartment on the right side you will see several cannon plugs. My recommendation is u remove them one at a time, and hose them down with an electrical contact spray cleaner. Very few engines are super clean. Over the years oil works itself into cannon plugs and crazy things happen. I had issues with my tach generator plug and a bouncy rpm gage until I cleaned out the oil. Give it a try, can't hurt.

Greg "Clouddog" Wrobel

AA Retired

On Aug 26, 2017 1:08 PM, "727gs" <727gs(at)att.net (727gs(at)att.net)> wrote:

 	  Quote: 	
		  --> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>

 After starting my stock CJ-6, I noticed that the oil pressure needle on the triple gauge would bounce from normal pressure to 0 and back very quickly, like there was an electrical ground or connection that was intermittent. No real pattern to it and it went away when the power was advanced. All other indications were normal. I reseated the canon plugs on the back of the instrument to no avail and have no idea where the oil pressure probe on the engine is located.

 Any ideas? Thanks in advance.

 Steve Jones

 near Chicago

 --------

 Steve near Chicago

 Read this topic online here:

 http://forums.matronics.com/ viewtopic.php?p=472217#472217

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n13472(at)aol.com
Guest

Posted: Sat Aug 26, 2017 4:01 pm Post subject: Housai Oil Pressure

Oli press sensors are NOT in the engine compartment.

Open the lower right side pnl on the fuselage they are mounted on the back side of the firewall

note the front and rear oil press gauges and sensor are independent of each other.

 

 

Tom Elliott

CJ-6A NX63727

777 Quartz Ave

PMB 7004

Sandy Valley NV.

89019

Cell 541-297-5497

N13472(at)AOL.COM

 

 

 

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

Sent: Saturday, August 26, 2017 2:35 PM

To: yak-list(at)matronics.com

Subject: Re: Housai Oil Pressure

 

Steve, inside the engine compartment on the right side you will see several cannon plugs. My recommendation is u remove them one at a time, and hose them down with an electrical contact spray cleaner. Very few engines are super clean. Over the years oil works itself into cannon plugs and crazy things happen. I had issues with my tach generator plug and a bouncy rpm gage until I cleaned out the oil. Give it a try, can't hurt.

 



 



Greg "Clouddog" Wrobel



AA Retired

 

On Aug 26, 2017 1:08 PM, "727gs" <727gs(at)att.net (727gs(at)att.net)> wrote:

--> Yak-List message posted by: "727gs" <727gs(at)att.net (727gs(at)att.net)>



After starting my stock CJ-6, I noticed that the oil pressure needle on the triple gauge would bounce from normal pressure to 0 and back very quickly, like there was an electrical ground or connection that was intermittent. No real pattern to it and it went away when the power was advanced. All other indications were normal. I reseated the canon plugs on the back of the instrument to no avail and have no idea where the oil pressure probe on the engine is located.



Any ideas? Thanks in advance.



Steve Jones

near Chicago



--------

Steve near Chicago





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=472217#472217

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wlannon(at)shaw.ca
Guest

Posted: Sat Aug 26, 2017 5:22 pm Post subject: Housai Oil Pressure

That certainly sounds like an electrical problem.  A defective Cannon plug 

is a very real possibility;  either dirty contacts, broken wire making 

intermittent contact, etc.  Could be at the guage or the transmitter.  The 

oil press. transmitters (one for each cockpit) are mounted on frame 1.  The 

firewall is frame 0 and the FUEL press. transmitters are mounted on  the aft 

side of that- see photo.  Oil press. units are the same but colour coded 

brown rather than yellow.  Sorry, no photo for those!



Check continuity to determine correct transmitter.  Good luck.



Walt



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Harv

Joined: 01 Jul 2010
Posts: 170

Posted: Tue Aug 29, 2017 5:06 am Post subject: Re: Housai Oil Pressure

Tom



Your CJ maybe like mine and the oil pressure senders are not located on the rear of the engine firewall but the secondary frame wall/cockpit area one. 



The pic that Walt posted shows the approximate type and shape of the sender's but those I believe are the fuel ones and the oil senders (Transducers if you prefer) have a brown case covers.



On my aircraft they are located in the front cockpit and bolt through the panel (you may call is a secondary firewall or forward frame) just above the STB rudder pedal area.



Now its interesting you mention the issue you are having as my CJ oil pressure went exactly the same in the front cockpit and after alot of messing about I traced it to a faulty sender (swapping cannon plugs identified where the issue lay) which when opened up looked like it had been full of water??. I managed to rinse the muck out of it and clean up the delicate internals and it now works but I had to fabricate a new spring to return the potentiometer arm to zero.



Hope this helps.

GeorgeCoy

Joined: 02 Dec 2010
Posts: 308

Posted: Tue Aug 29, 2017 5:22 am Post subject: Housai Oil Pressure

We have spare transducers  if needed.

George Coy



--

wlannon(at)shaw.ca
Guest

Posted: Tue Aug 29, 2017 9:18 am Post subject: Housai Oil Pressure

Harv;



Did you read the text?   Or do you just look at pictures?



Walt



--

Harv

Joined: 01 Jul 2010
Posts: 170

Posted: Tue Aug 29, 2017 9:56 am Post subject: Re: Housai Oil Pressure

Yes I did but making doubly sure the op is without doubt about colours and location of senders as there seems to be some confusion earlier in this post.



 Moreover hopefully my matching symptoms/mode of failure will provide a steer as to the possible issue he's having

wlannon(at)shaw.ca
Guest

Posted: Tue Aug 29, 2017 5:25 pm Post subject: Housai Oil Pressure

A simple apology would have been in order but you don't appear to understand 

that either.



Walt



--

Harv

Joined: 01 Jul 2010
Posts: 170

Posted: Wed Sep 06, 2017 9:03 am Post subject: Re: Housai Oil Pressure

Sorry Walt, 



Rgs

Harv

wlannon(at)shaw.ca
Guest

Posted: Wed Sep 06, 2017 12:01 pm Post subject: Housai Oil Pressure

Many thanks Harv.



Best;

Walt



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