Today's Message Index:
----------------------
1. 04:21 AM - Re: Generator Won't Generate (A. Dennis Savarese)
2. 04:47 AM - Re: Generator Won't Generate (Rob Rowe)
3. 06:08 AM - No Spartanburg show. (cjpilot710@aol.com)
4. 07:03 AM - Re: Prop seal replacement and subsequent vibration (flir47)
5. 07:25 AM - Re: No Spartanburg show. (Hank Gibson)
6. 09:43 AM - Re: Generator Won't Generate (Walter Lannon)
7. 11:29 AM - Re: No Spartanburg show. (Drew Blahnick)
8. 01:16 PM - Re: Re: Prop seal replacement and subsequent vibration (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
9. 01:25 PM - Re: Generator Won't Generate (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
10. 01:37 PM - Re: Re: Prop seal replacement and subsequent vibration (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
11. 02:15 PM - Re: Generator Won't Generate (Mike Bell)
12. 02:32 PM - Re: Re: Generator Won't Generate (Walter Lannon)
13. 03:02 PM - Re: Re: Generator Won't Generate (doug sapp)
14. 03:36 PM - Re: Re: Generator Won't Generate (Ron Davis)
15. 03:44 PM - Re: Re: Generator Won't Generate (Walter Lannon)
16. 05:46 PM - Re: Re: Prop seal replacement and subsequent vibration (Roger Kemp)
17. 05:59 PM - Re: Prop seal replacement and subsequent vibration (flir47)
18. 06:09 PM - Re: Prop seal replacement and subsequent vibration (Scooter)
19. 07:45 PM - Re: Re: Prop seal replacement and subsequent vibration (cjpilot710@aol.com)
20. 11:41 PM - Re: Re: Generator Won't Generate (ggg6@att.net)
Message 1
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "A. Dennis Savarese" <dsavarese@elmore.rr.com>
When you initially turn the battery switch on do you hear a "click" like
relay contacts closing?
Dennis
----- Original Message -----
From: "Mike Bell" <yakflyr@comcast.net>
Sent: Monday, September 04, 2006 9:45 PM
Subject: Yak-List: Generator Won't Generate
> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>
> Test ran my Yak-52 after months of work only to find the "Generator
> Damage" light is on and ammeter confirms. Run-up to 70% doesn't make a
> difference. I have checked the overvoltage button (not popped), looked
> around in the "power supply" box (wiggled the fuses, and continuity
> confirmed on the big 30 amp fuses). I pulled the perfectly-running
> generator a few months ago to replace the brushes. Measured wrong and the
> old brushes were OK but since it was off put in new ones. My recollection
> is that I ran it and the generator was fine but now I'm not positive about
> that. The 3 wires to the generator are in correctly. Lots of activity
> around the engine lately with new hoses and all, but no wiring touched.
>
> An old post mentioned the DMP-200D reverse current relay can fail, same
> with the voltage regulator or the TS-9M-2 transformer.
>
> Surely there is a logical way to pin down the problem without replacing
> components one at a time. Could the generator need the field flashed, or
> is that just urban legend? Appreciate any advice. Once this is fixed it
> will finally be flying again.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=59518#59518
>
>
>
Message 2
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Rob Rowe" <yak-list@robrowe.plus.com>
Mike,
FWIW - couple of other quick checks;
- make sure the over-voltage protection relay -2 has not tripped. Reset the external
trip-button ... box just above your feet.
- be aware that if using external power the generator is forced offline until the
powered external connector is removed (even when you've switched over to battery).
Guess the tell-tale generator warning light helps prevent pilots aero-towing
their GPUs ;-)
Rob
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59564#59564
Message 3
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| Subject: | No Spartanburg show. |
Troops,
Just called the Spartanburg airport.
They are not having a show on Sept 14 - 17.
Some please remove that info from the calendar.
All RPA pilot stand down.
Jim "Pappy' Goolsby
Message 4
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| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "flir47" <me262pilot@comcast.net>
Scooter,
I had the same issue pop up on one of the Yaks I own. I have pics of the check
that Dennis mentioned. E-mail me and Ill send them to you. If anyone else is interested
let me know and Ill send them. In my case the tube appears to have been
manufactured poorly. Because the miss-alignment happens so close to the center
of the axis it can be interesting to track down. This was a new prop from
overhaul in Romania. I straightened the tube and solved the vibration and the
subsequent leak too! Wonderful Russian quality.
Anyway this may help.
Mark
--------
It's not a real world war untill France surenders!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59598#59598
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| Subject: | Re: No Spartanburg show. |
Hi,
FNG here. Since Sartanburg is cancelled; Any lead and/or check pilots willing
to meet and fly some FAST training sorties in the SE for myself and maybe two
others weekend of Sep 16th? Pls contact off list.
Hank "Hoot" Gibson
cjpilot710@aol.com wrote:
Troops,
Just called the Spartanburg airport.
They are not having a show on Sept 14 - 17.
Some please remove that info from the calendar.
All RPA pilot stand down.
Jim "Pappy' Goolsby
Hank Gibson
904-994-6005 Mobile
912-484-6001 Home
hkgibby@yahoo.com
---------------------------------
Get your email and more, right on the new Yahoo.com
Message 6
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
No wive's tale. Residual magnetism is depleted over time if not in use.
Flash the field.
Did you seat the new brushes? If not you may have some erratic operation
initially. Brushes on these generators will last for many years.
Walt
----- Original Message -----
From: "Mike Bell" <yakflyr@comcast.net>
Sent: Monday, September 04, 2006 7:45 PM
Subject: Yak-List: Generator Won't Generate
> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>
> Test ran my Yak-52 after months of work only to find the "Generator
> Damage" light is on and ammeter confirms. Run-up to 70% doesn't make a
> difference. I have checked the overvoltage button (not popped), looked
> around in the "power supply" box (wiggled the fuses, and continuity
> confirmed on the big 30 amp fuses). I pulled the perfectly-running
> generator a few months ago to replace the brushes. Measured wrong and the
> old brushes were OK but since it was off put in new ones. My recollection
> is that I ran it and the generator was fine but now I'm not positive about
> that. The 3 wires to the generator are in correctly. Lots of activity
> around the engine lately with new hoses and all, but no wiring touched.
>
> An old post mentioned the DMP-200D reverse current relay can fail, same
> with the voltage regulator or the TS-9M-2 transformer.
>
> Surely there is a logical way to pin down the problem without replacing
> components one at a time. Could the generator need the field flashed, or
> is that just urban legend? Appreciate any advice. Once this is fixed it
> will finally be flying again.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=59518#59518
>
>
>
Message 7
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| Subject: | Re: No Spartanburg show. |
Rogo Jim,
Drew
cjpilot710@aol.com wrote:
Troops,
Just called the Spartanburg airport.
They are not having a show on Sept 14 - 17.
Some please remove that info from the calendar.
All RPA pilot stand down.
Jim "Pappy' Goolsby
---------------------------------
Message 8
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| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E" <mark.bitterlich@navy.mil>
Not to disagree with anyone's suggestions (all good), but the first
thing I would do would be to either purchase or borrow an Infra Red
Temperature gun.... Run the engine for awhile and then go shoot each
cylinder and check for close to the same readings on each one. It might
be something so simple as a dead cylinder. Compression checks to
follow.
Or ... Do the following first:
Take a REALLY close look at your intake drain system. A lot of these
systems were installed with #4 AN fittings and soft aluminum lines.
Over time theses things are prone to crack and break, leaving you with a
rather large leak in the intake system, which makes the engine run rough
just as you have described. The best solution here of course is to use
flexible steel braided lines. I've seen this one nail four people so
far... Me being one of them of course.
Best of luck,
Mark Bitterlich
N50YK
Message 9
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| Subject: | Generator Won't Generate |
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E" <mark.bitterlich@navy.mil>
Flashing a brand new generator is not urban legend as anyone who is old
enough to have driven a car with a real generator to can attest.
However... replacing the brushes would not result in a situation that
would require that. Before looking into the reverse current relay,
voltage regulator, or anything else for that matter.. There are a few
things I would check first.
First, (and this failure happened to me)...pull the engine through and
make sure the generator is actually turning. No, I am not kidding.
The generator uses a drive shaft that is intended to shear under load
instead of transferring a jam up to the accessory drive system of the
engine, which could be catastrophic. Since you recently had the
generator either out of the engine, OR just changed the brushes... It is
possible that something got screwed up somehow in that process and the
generator itself jammed. If it did, you will have sheared the shaft and
you will be able to notice this either by pulling the generator and
turning it by hand or simply looking at it and seeing that it is not
turning at all with the engine either running or by pulling it through.
If that happened, buy a new generator. You can usually get a used one
for $100 or less from someone who replaced it with a B&C system.
If that is ok, and the generator is actually turning, start the engine
with the wire cover off the connections and check the output voltage of
the generator and the field winding, and report what voltages you get.
This will help narrow down what is happening.
Good Luck,
Mark Bitterlich
N50YK
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mike Bell
Sent: Monday, September 04, 2006 22:46
Subject: Yak-List: Generator Won't Generate
--> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
Test ran my Yak-52 after months of work only to find the "Generator
Damage" light is on and ammeter confirms. Run-up to 70% doesn't make a
difference. I have checked the overvoltage button (not popped), looked
around in the "power supply" box (wiggled the fuses, and continuity
confirmed on the big 30 amp fuses). I pulled the perfectly-running
generator a few months ago to replace the brushes. Measured wrong and
the old brushes were OK but since it was off put in new ones. My
recollection is that I ran it and the generator was fine but now I'm not
positive about that. The 3 wires to the generator are in correctly. Lots
of activity around the engine lately with new hoses and all, but no
wiring touched.
An old post mentioned the DMP-200D reverse current relay can fail, same
with the voltage regulator or the TS-9M-2 transformer.
Surely there is a logical way to pin down the problem without replacing
components one at a time. Could the generator need the field flashed,
or is that just urban legend? Appreciate any advice. Once this is fixed
it will finally be flying again.
--------
Mike Bell
Yak 52
Elk Grove, CA
yakflyr@comcastdotnet
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59518#59518
Message 10
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| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E" <mark.bitterlich@navy.mil>
But with all that said, my money is "the bent oil tube" suggestion.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich,
Mark G CIV Det Cherry Point, MALS-14 64E
Sent: Tuesday, September 05, 2006 16:15
Subject: RE: Yak-List: Re: Prop seal replacement and subsequent
vibration
--> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry
--> Point, MALS-14 64E" <mark.bitterlich@navy.mil>
Not to disagree with anyone's suggestions (all good), but the first
thing I would do would be to either purchase or borrow an Infra Red
Temperature gun.... Run the engine for awhile and then go shoot each
cylinder and check for close to the same readings on each one. It might
be something so simple as a dead cylinder. Compression checks to
follow.
Or ... Do the following first:
Take a REALLY close look at your intake drain system. A lot of these
systems were installed with #4 AN fittings and soft aluminum lines.
Over time theses things are prone to crack and break, leaving you with a
rather large leak in the intake system, which makes the engine run rough
just as you have described. The best solution here of course is to use
flexible steel braided lines. I've seen this one nail four people so
far... Me being one of them of course.
Best of luck,
Mark Bitterlich
N50YK
Message 11
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
Thank you all for the tips. There is a definite click when the batt switch comes
on. I checked the overvoltage regulator red reset button and it's not tripped.
I asked before on this forum about seating the brushes and was told not to
worry about it. The Yak manual mentions a break-in procedure to be done on the
bench but no specifics. If that's the problem it may cure itself. The generator
is turning when I move the prop. I will check some voltages the next time I
run it.
Does anyone know how to flash the field on this specific generator? My IA is pulling
out some old books to check on it. I have read all kinds of conflicting
methods. My guess is disconnect the 3 wires from the generator so as not to fry
anything else, then touch 24V positive from the battery to the field terminal
(the little one in the middle). Some sources say to repeat it 5 times. hold
it 30 seconds, brushes must be out, garlic around neck, etc.
--------
Mike Bell
Yak 52
Elk Grove, CA
yakflyr@comcastdotnet
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59720#59720
Message 12
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
Mike;
Just remove the wire from the field terminal, find a source of 24v from the
batt bus and contact the field terminal for 1 second. Brushes do not need to
be removed.
You did say the generator has been idle for "months". That is a likely
reason to lose the residual magnetic field.
Walt
----- Original Message -----
From: "Mike Bell" <yakflyr@comcast.net>
Sent: Tuesday, September 05, 2006 2:14 PM
Subject: Yak-List: Re: Generator Won't Generate
> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>
> Thank you all for the tips. There is a definite click when the batt switch
> comes on. I checked the overvoltage regulator red reset button and it's
> not tripped. I asked before on this forum about seating the brushes and
> was told not to worry about it. The Yak manual mentions a break-in
> procedure to be done on the bench but no specifics. If that's the problem
> it may cure itself. The generator is turning when I move the prop. I will
> check some voltages the next time I run it.
>
> Does anyone know how to flash the field on this specific generator? My IA
> is pulling out some old books to check on it. I have read all kinds of
> conflicting methods. My guess is disconnect the 3 wires from the generator
> so as not to fry anything else, then touch 24V positive from the battery
> to the field terminal (the little one in the middle). Some sources say to
> repeat it 5 times. hold it 30 seconds, brushes must be out, garlic around
> neck, etc.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=59720#59720
>
>
>
Message 13
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|
| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "doug sapp" <rvfltd@televar.com>
All smoke and mirrors, My CJ5 was in storage for 17 years, generator worked
perfectly when the engine was started. Don't get me wrong, I'm not saying
that this is not the problem, only that I don't unnastan?? How many engines
have come out of 4-5 years of storage after overhaul and the gens are gening
just fine??
Always Yakin,
Doug Sapp
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com]On Behalf Of Walter Lannon
Sent: Tuesday, September 05, 2006 2:30 PM
Subject: Re: Yak-List: Re: Generator Won't Generate
--> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
Mike;
Just remove the wire from the field terminal, find a source of 24v from the
batt bus and contact the field terminal for 1 second. Brushes do not need to
be removed.
You did say the generator has been idle for "months". That is a likely
reason to lose the residual magnetic field.
Walt
----- Original Message -----
From: "Mike Bell" <yakflyr@comcast.net>
Sent: Tuesday, September 05, 2006 2:14 PM
Subject: Yak-List: Re: Generator Won't Generate
> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>
> Thank you all for the tips. There is a definite click when the batt switch
> comes on. I checked the overvoltage regulator red reset button and it's
> not tripped. I asked before on this forum about seating the brushes and
> was told not to worry about it. The Yak manual mentions a break-in
> procedure to be done on the bench but no specifics. If that's the problem
> it may cure itself. The generator is turning when I move the prop. I will
> check some voltages the next time I run it.
>
> Does anyone know how to flash the field on this specific generator? My IA
> is pulling out some old books to check on it. I have read all kinds of
> conflicting methods. My guess is disconnect the 3 wires from the generator
> so as not to fry anything else, then touch 24V positive from the battery
> to the field terminal (the little one in the middle). Some sources say to
> repeat it 5 times. hold it 30 seconds, brushes must be out, garlic around
> neck, etc.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=59720#59720
>
>
Message 14
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Ron Davis" <L39parts@hotmail.com>
It depends on whether the plane was put in sorage pointed north or south.
----- Original Message -----
From: "doug sapp" <rvfltd@televar.com>
Sent: Tuesday, September 05, 2006 3:01 PM
Subject: RE: Yak-List: Re: Generator Won't Generate
> --> Yak-List message posted by: "doug sapp" <rvfltd@televar.com>
>
> All smoke and mirrors, My CJ5 was in storage for 17 years, generator
> worked
> perfectly when the engine was started. Don't get me wrong, I'm not saying
> that this is not the problem, only that I don't unnastan?? How many
> engines
> have come out of 4-5 years of storage after overhaul and the gens are
> gening
> just fine??
>
> Always Yakin,
> Doug Sapp
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com]On Behalf Of Walter Lannon
> Sent: Tuesday, September 05, 2006 2:30 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Generator Won't Generate
>
>
> --> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
>
> Mike;
>
> Just remove the wire from the field terminal, find a source of 24v from
> the
> batt bus and contact the field terminal for 1 second. Brushes do not need
> to
> be removed.
>
> You did say the generator has been idle for "months". That is a likely
> reason to lose the residual magnetic field.
>
> Walt
> ----- Original Message -----
> From: "Mike Bell" <yakflyr@comcast.net>
> To: <yak-list@matronics.com>
> Sent: Tuesday, September 05, 2006 2:14 PM
> Subject: Yak-List: Re: Generator Won't Generate
>
>
>> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>>
>> Thank you all for the tips. There is a definite click when the batt
>> switch
>> comes on. I checked the overvoltage regulator red reset button and it's
>> not tripped. I asked before on this forum about seating the brushes and
>> was told not to worry about it. The Yak manual mentions a break-in
>> procedure to be done on the bench but no specifics. If that's the problem
>> it may cure itself. The generator is turning when I move the prop. I will
>> check some voltages the next time I run it.
>>
>> Does anyone know how to flash the field on this specific generator? My IA
>> is pulling out some old books to check on it. I have read all kinds of
>> conflicting methods. My guess is disconnect the 3 wires from the
>> generator
>> so as not to fry anything else, then touch 24V positive from the battery
>> to the field terminal (the little one in the middle). Some sources say to
>> repeat it 5 times. hold it 30 seconds, brushes must be out, garlic around
>> neck, etc.
>>
>> --------
>> Mike Bell
>> Yak 52
>> Elk Grove, CA
>> yakflyr@comcastdotnet
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=59720#59720
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 15
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| Subject: | Re: Generator Won't Generate |
--> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
Very true Doug;
I have had the same experience but also a few that did not generate. Most of
these were immediately "fixed" by flashing. This is over a 40 year period
mostly with Bendix/Eclipse and Leece Neville generators all virtually
identical to the Chinese (or Russian) variety.
There may be another problem but this is the first, and easiest, possible
corrective action.
Cheers;
Walt
----- Original Message -----
From: "doug sapp" <rvfltd@televar.com>
Sent: Tuesday, September 05, 2006 3:01 PM
Subject: RE: Yak-List: Re: Generator Won't Generate
> --> Yak-List message posted by: "doug sapp" <rvfltd@televar.com>
>
> All smoke and mirrors, My CJ5 was in storage for 17 years, generator
> worked
> perfectly when the engine was started. Don't get me wrong, I'm not saying
> that this is not the problem, only that I don't unnastan?? How many
> engines
> have come out of 4-5 years of storage after overhaul and the gens are
> gening
> just fine??
>
> Always Yakin,
> Doug Sapp
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com]On Behalf Of Walter Lannon
> Sent: Tuesday, September 05, 2006 2:30 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: Re: Generator Won't Generate
>
>
> --> Yak-List message posted by: "Walter Lannon" <wlannon@cablerocket.com>
>
> Mike;
>
> Just remove the wire from the field terminal, find a source of 24v from
> the
> batt bus and contact the field terminal for 1 second. Brushes do not need
> to
> be removed.
>
> You did say the generator has been idle for "months". That is a likely
> reason to lose the residual magnetic field.
>
> Walt
> ----- Original Message -----
> From: "Mike Bell" <yakflyr@comcast.net>
> To: <yak-list@matronics.com>
> Sent: Tuesday, September 05, 2006 2:14 PM
> Subject: Yak-List: Re: Generator Won't Generate
>
>
>> --> Yak-List message posted by: "Mike Bell" <yakflyr@comcast.net>
>>
>> Thank you all for the tips. There is a definite click when the batt
>> switch
>> comes on. I checked the overvoltage regulator red reset button and it's
>> not tripped. I asked before on this forum about seating the brushes and
>> was told not to worry about it. The Yak manual mentions a break-in
>> procedure to be done on the bench but no specifics. If that's the problem
>> it may cure itself. The generator is turning when I move the prop. I will
>> check some voltages the next time I run it.
>>
>> Does anyone know how to flash the field on this specific generator? My IA
>> is pulling out some old books to check on it. I have read all kinds of
>> conflicting methods. My guess is disconnect the 3 wires from the
>> generator
>> so as not to fry anything else, then touch 24V positive from the battery
>> to the field terminal (the little one in the middle). Some sources say to
>> repeat it 5 times. hold it 30 seconds, brushes must be out, garlic around
>> neck, etc.
>>
>> --------
>> Mike Bell
>> Yak 52
>> Elk Grove, CA
>> yakflyr@comcastdotnet
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=59720#59720
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
Message 16
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| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "Roger Kemp" <viperdoc@mindspring.com>
Mark,
I have left my intake drain open a couple of times. I did notice it
misssing but not a violent vibration. If that is what Scooter was trying to
relate.
Doc
> [Original Message]
> From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E
<mark.bitterlich@navy.mil>
> To: <yak-list@matronics.com>
> Date: 9/5/2006 3:31:20 PM
> Subject: RE: Yak-List: Re: Prop seal replacement and subsequent vibration
>
> --> Yak-List message posted by: "Bitterlich, Mark G CIV Det Cherry Point,
MALS-14 64E" <mark.bitterlich@navy.mil>
>
>
> Not to disagree with anyone's suggestions (all good), but the first
> thing I would do would be to either purchase or borrow an Infra Red
> Temperature gun.... Run the engine for awhile and then go shoot each
> cylinder and check for close to the same readings on each one. It might
> be something so simple as a dead cylinder. Compression checks to
> follow.
>
> Or ... Do the following first:
>
>
> Take a REALLY close look at your intake drain system. A lot of these
> systems were installed with #4 AN fittings and soft aluminum lines.
> Over time theses things are prone to crack and break, leaving you with a
> rather large leak in the intake system, which makes the engine run rough
> just as you have described. The best solution here of course is to use
> flexible steel braided lines. I've seen this one nail four people so
> far... Me being one of them of course.
>
> Best of luck,
>
> Mark Bitterlich
> N50YK
>
>
Message 17
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|
| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "flir47" <me262pilot@comcast.net>
Hey doc me too! and also the cracked elbow. On shutdown caused a diesel condition.
Thats about it though. How violent is violent??? hummmmmm :?
--------
It's not a real world war untill France surenders!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59794#59794
Message 18
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| Subject: | Re: Prop seal replacement and subsequent vibration |
--> Yak-List message posted by: "Scooter" <yakk52@verizon.net>
Thanks for all the suggestions. I think I've checked just about everything mentioned.
I ran it again today and I can quantify the vibration a bit better.
It seems to have several resonant frequencies. At 44% the instrument panel shakes
to a blur. At 50% the pilot shakes (and everything blurs). It is substantial.
I am again thinking it must be the prop. I pulled all the plugs, cleaned them
and did a "finger" check on compression. Seemed fine (nothing stuck open).
At this point I'm thinking the next step is to make a jumbo prop wrench, take the
blades off, clean out the oil, grease, etc. and replace the seals while i'm
at it.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=59798#59798
Message 19
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|
| Subject: | Re: Prop seal replacement and subsequent vibration |
Have you check to make sure your primer is closed and locked? Also at least
a Chinese primer, once had a broken spring in the bottom which allowed it to
stay open.
The primer line goes into the case right near #9 cylinders. It will flood
out that cylinder. Vibration can be quite as you describe.
Jim "Pappy" Goolsby
Message 20
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| Subject: | Re: Generator Won't Generate |
Mike You can flash the field without removing the brushes, and it only takes a
couple of times to apply voltage to the field, I never hold the hot wire on the
field, only strike it for a second then off, it does not take much. Basically
just arc the field terminal quickly... Gary..
-------------- Original message from "Mike Bell" <yakflyr@comcast.net>: --------------
> --> Yak-List message posted by: "Mike Bell"
>
> Thank you all for the tips. There is a definite click when the batt switch comes
> on. I checked the overvoltage regulator red reset button and it's not tripped.
I
> asked before on this forum about seating the brushes and was told not to worry
> about it. The Yak manual mentions a break-in procedure to be done on the bench
> but no specifics. If that's the problem it may cure itself. The generator is
> turning when I move the prop. I will check some voltages the next time I run
it.
>
> Does anyone know how to flash the field on this specific generator? My IA is
> pulling out some old books to check on it. I have read all kinds of conflicting
> methods. My guess is disconnect the 3 wires from the generator so as not to fry
> anything else, then touch 24V positive from the battery to the field terminal
> (the little one in the middle). Some sources say to repeat it 5 times. hold it
> 30 seconds, brushes must be out, garlic around neck, etc.
>
> --------
> Mike Bell
> Yak 52
> Elk Grove, CA
> yakflyr@comcastdotnet
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=59720#59720
>
>
>
>
>
>
>
>
>
>
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<DIV></DIV>Mike You can flash the field without removing the brushes, and
it only takes a couple of times to apply voltage to the field, I never hold the
hot wire on the field, only strike it for a second then off, it does not take
much. Basically just arc the field terminal quickly... Gary.. <BR>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px
solid">-------------- Original message from "Mike Bell" <yakflyr@comcast.net>:
-------------- <BR><BR><BR>> --> Yak-List message posted by: "Mike
Bell" <YAKFLYR@COMCAST.NET><BR>> <BR>> Thank you all for the tips. There
is a definite click when the batt switch comes <BR>> on. I checked the
overvoltage regulator red reset button and it's not tripped. I <BR>> asked
before on this forum about seating the brushes and was told not to worry <BR>>
about it. The Yak manual mentions a break-in procedure to be done on the
bench <BR>> but no specifics. If that's the problem it may cure itself. The
generator is <BR>> turning when I move the prop. I will check some voltages
the next time I run it. <BR>> <BR>> Does anyone know how to flash the
field on this specific generator? My IA is <BR>> pulling out some old books
to check on it. I have read all kinds of conflicting
<BR>&
are, a
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