 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
cjaviator(at)gmail.com
Guest
|
 Posted: Wed Mar 04, 2009 3:42 pm Post subject: Nanchang Generator problem |
 |
|
Hi all.
As generator theory is not my strong point I shall put forward the following problem in the hope someon can point me in the right direction (having read and digested the traffic early this week!)
We are preparing to put a factory 'overhauled' Nanchang back in the air after it has sat on the airfield here for 2 1/2 years. All works perfectly except the generator...
When the engine was first run it appeared to be fine. 2nd run and the generator light appeared to acting correctly at low RPM (on and off at (at)1000 RPM, but the ammeter was jumping all over the place. At higher RPMs the ammeter was jumping all over the place and the light was going on and off as it jumped around from load to unload.
After this run we sorted out a few other minor problems and checked the generator brushes and springs. All appears to be good with new brushes fitted, although one seemed a bit stiff in the housing.
After freeing it up we took it out and ran it again with the result that the generator light now stays on and steady at all RPMs.
Someone suggested that the generator might need flashing after having sat around for a long period of time, but I don't believe that this would be the case given that it was kind of operating to start with.
Any assistance here would be greatly appreciated
Regards, Jay
New Zeland
[quote][b]
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
 |
dhanshew(at)cinci.rr.com
Guest
|
| Posted: Wed Mar 04, 2009 3:55 pm Post subject: Nanchang Generator problem |
|
|
Flash it.
[quote] ---
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
talew(at)bellsouth.net
Guest
|
| Posted: Wed Mar 04, 2009 4:29 pm Post subject: Nanchang Generator problem |
|
|
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
cjaviator(at)gmail.com
Guest
|
| Posted: Thu Mar 05, 2009 11:59 am Post subject: Nanchang Generator Problem |
|
|
OK... if flashing the field is the answer, how does one go about it on the Nanchang?
I have done a conventional western generator/regualtor before by following the procedure in the A&P manuals but would like to know how to do the Nanchang!
Cheers, Jay
[quote][b]
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
yakplt(at)yahoo.com
Guest
|
| Posted: Thu Mar 05, 2009 3:27 pm Post subject: Nanchang Generator Problem |
|
|
I have never worked on a CJ in my life. I do not know beans about it.
There is nothing wrong with flashing your generator... this is usually done by applying a quick burst of battery voltage to the brushes (+ and - connections) with the generator spinning. Plus to plus mind you.
However, if it uses a generator, it has to have a cut out relay. Just a fact of generator design. Before you go nuts on this thing, check the voltage AT THE GENERATOR when it is running. Do not depend on "indicator lights" to determine whether a generator is putting out power, use a meter.
Rule of thumb about something that was sorta working and then stopped dead. Go to where the last human being l;aid their hands on it and look for problems there. As in... you messed with the brushes, you noticed something not quite right, you fixed it... now it does not work at all. If a commutator brush is not touching the commutator properly.... the generator will go dead.
Further, your problem sounds exactly like a problem with brushes and springs. I mean your FIRST problem.
At the risk of getting into another "discussion"... this does not sound like a generator that needs a flash.... but there are many ways to approach a problem and never forget I have way too much time on my hands.
Oh... by the way... a flash may indeed arc over to a poorly seated brush and voila, it starts working. Or it may not. If flashing it does not work... look at those brushes again. If that does not work.... read my last email.
Mark Bitterlich
N50YK
From: Jay McIntyre <cjaviator(at)gmail.com>
To: yak list <yak-list(at)matronics.com>
Sent: Thursday, March 5, 2009 2:55:53 PM
Subject: Nanchang Generator Problem
OK... if flashing the field is the answer, how does one go about it on the Nanchang?
I have done a conventional western generator/regualtor before by following the procedure in the A&P manuals but would like to know how to do the Nanchang!
Cheers, Jay
[quote][b][b]
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
dhanshew(at)cinci.rr.com
Guest
|
| Posted: Fri Mar 06, 2009 4:18 am Post subject: Nanchang Generator Problem |
|
|
Do it the same.
[quote] ---
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
