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Yak Stuck Out... It's a BAD relay!

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Ernie

Joined: 11 Jan 2006
Posts: 513

Posted: Fri Feb 10, 2006 5:12 pm Post subject: Yak Stuck Out... It's a BAD relay!

This was a great thread, but a little foreign to me. Does the CJ have

a similar system?????



Ernie



On 2/10/06, MajorGoofinoff(at)aol.com <MajorGoofinoff(at)aol.com> wrote:

 	  Quote: 	
		   OK,



    Here is the answer as to why my Yak would not fire the booster coil or

 the Air Solenoid.

 The IGNITION RELAY -TKE52- in the relay box at station 6 is BAD.



    The relay box is located behind the rear instrument panel.  I

 disconnected the instrument air and power lines then removed the center

 instruments.  If you have not notice when you undo the two thumb screws at

 the top of the instruments the panel will fold down and out.  Down on the

 left and right hinges that the panel rotates on, you will find that each has

 a removable pin.  This will allow you to pull the complete instrument

 package out of the way, with the exception of the heading compass. Just

 remove the three screws holding it in, and leave it there.



     The relay box is located in the upper right hand side.  Has two cannon

 plugs on the bottom, one large and one small, and lots of Russian safety

 wire.  Remove the two cannon plugs, then remove the four screws holding the

 box to the bulkhead.  Take box out and cut safety wire. Once you have done

 all of this, getting to the relay inside is easy.



     After I sorted out what was what on the relay I reconnected the cannon

 plugs and powered up the airplane.  Just as I expected my multi-meter show

 that 28 V power from the 10 Amp ignition breaker switch (the one down by the

 battery switch) was feeding into the relay and was ready and waiting to

 power the air solenoid and shower of sparks.



 .  Next I checked that each starter button when pressed would send power to

 the relay and they worked fine.  From the bench check I did I suspected that

 the starter button power was not making it through the relay and in turn was

 not pulling the relay closed.  I checked the ground terminal to make sure

 that the wire had good continuity and of course it did.



     Only one thing left to due and that was jump the 28 V feed line to the

 air solenoid line.  When I turned on the battery and flipped the ignition

 switch on the air solenoid made that lovely POP and sent air to spin the

 prop.

    After having pulled this box, I would not want to do this in the field.

 I will keep that extra booster coil with the pig tail handy.  Once you got

 the tool, its a quick fix.



 Scott.

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brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Sat Feb 11, 2006 2:16 pm Post subject: Yak Stuck Out... It's a BAD relay!

Ernest Martinez wrote:

 	  Quote: 	
		   

 

 This was a great thread, but a little foreign to me. Does the CJ have

 a similar system?????


	


Yes and no. There is no relay in the CJ6A. The start button carries the

whole load. The bus feeds the ignition toggle switch which then feeds

the start button. That splits and drives the air start solenoid and the

boost coil in parallel.



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

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_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

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