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pnicholson
Joined: 04 Jun 2011
Posts: 46
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 Posted: Tue Jul 10, 2012 2:57 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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Gentlemen,
occasionally, I attempt to start my HS6A and am met with a 'psssst' and no prop turning. I'll move the prop, but same issue. If I put a battery charger on, the engine turns over easily. Main air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger problems afoot.
Thanks,
Phil Nicholson
C-FEPN
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byronmfox(at)gmail.com
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| Posted: Tue Jul 10, 2012 3:07 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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Perhaps your battery is too weak to throw the starter solenoid. By adding the charger, you temporarily solve the problem. A guess.
On Tue, Jul 10, 2012 at 3:57 PM, pnicholson <pednicholson(at)gmail.com (pednicholson(at)gmail.com)> wrote:
| Quote: | --> Yak-List message posted by: "pnicholson" <pednicholson(at)gmail.com (pednicholson(at)gmail.com)>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a 'psssst' and no prop turning. I'll move the prop, but same issue. If I put a battery charger on, the engine turns over easily. Main air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger problems afoot.
Thanks,
Phil Nicholson
C-FEPN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=377949#377949
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Byron M. Fox
80 Milland Drive
Mill Valley, CA 94941
415-307-2405
[quote][b]
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dougsappllc(at)gmail.com
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| Posted: Tue Jul 10, 2012 3:19 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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Phil,Your QDF-1 start valve is about TU.
It is an electro/pneumatic valve, meaning it has a solenoid in it which opens the valve and allows the air to get to the engine. Your solenoid works better with more charge (on the charger) because it is corroded and requires more power (amps) to open the valve.
However you might try flushing out the pneumatic side with WD-40, give me a call and I'll explain the process.
I have them in stock if needed.
Best,
Doug
509-826-4610
On Tue, Jul 10, 2012 at 3:57 PM, pnicholson <pednicholson(at)gmail.com (pednicholson(at)gmail.com)> wrote:
[quote]--> Yak-List message posted by: "pnicholson" <pednicholson(at)gmail.com (pednicholson(at)gmail.com)>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a 'psssst' and no prop turning. I'll move the prop, but same issue. If I put a battery charger on, the engine turns over easily. Main air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger problems afoot.
Thanks,
Phil Nicholson
C-FEPN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=377949#377949
===========
rget="_blank">http://www.matronics.com/Navigator?Yak-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
[b]
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dsavarese0812(at)bellsout
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| Posted: Tue Jul 10, 2012 3:27 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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Byron is correct. The air start solenoid is not fully opening because
of the weak battery OR there may be some gunk inside the solenoid that
is causing it not to fully open. Replace the batteries first and try
it. If it still acts up, I'm sure Doug has new air start solenoids in
stock.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/10/2012 6:05 PM, Byron Fox wrote:
| Quote: | Perhaps your battery is too weak to throw the starter solenoid. By
adding the charger, you temporarily solve the problem. A guess.
On Tue, Jul 10, 2012 at 3:57 PM, pnicholson <pednicholson(at)gmail.com
<mailto:pednicholson(at)gmail.com>> wrote:
<pednicholson(at)gmail.com <mailto:pednicholson(at)gmail.com>>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a
'psssst' and no prop turning. I'll move the prop, but same issue.
If I put a battery charger on, the engine turns over easily. Main
air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger
problems afoot.
Thanks,
Phil Nicholson
C-FEPN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=377949#377949
===========
rget="_blank">http://www.matronics.com/Navigator?Yak-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
--
... Blitz
Byron M. Fox
80 Milland Drive
Mill Valley, CA 94941
415-307-2405
*
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dougsappllc(at)gmail.com
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| Posted: Tue Jul 10, 2012 3:43 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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The "gunk" can be flushed with WD-40 as I suggested. The process is simple.
Doug
On Tue, Jul 10, 2012 at 4:24 PM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
[quote]--> Yak-List message posted by: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)>
Byron is correct. The air start solenoid is not fully opening because of the weak battery OR there may be some gunk inside the solenoid that is causing it not to fully open. Replace the batteries first and try it. If it still acts up, I'm sure Doug has new air start solenoids in stock.
Dennis
A. Dennis Savarese
[url=tel:334-285-6263]334-285-6263[/url]
[url=tel:334-546-8182]334-546-8182[/url] (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/10/2012 6:05 PM, Byron Fox wrote:
| Quote: | Perhaps your battery is too weak to throw the starter solenoid. By adding the charger, you temporarily solve the problem. A guess.
On Tue, Jul 10, 2012 at 3:57 PM, pnicholson <pednicholson(at)gmail.com (pednicholson(at)gmail.com) <mailto:pednicholson(at)gmail.com (pednicholson(at)gmail.com)>> wrote:
--> Yak-List message posted by: "pnicholson"
<pednicholson(at)gmail.com (pednicholson(at)gmail.com) <mailto:pednicholson(at)gmail.com (pednicholson(at)gmail.com)>>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a
'psssst' and no prop turning. I'll move the prop, but same issue.
If I put a battery charger on, the engine turns over easily. Main
air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger
problems afoot.
Thanks,
Phil Nicholson
C-FEPN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=377949#377949
===========
rget="_blank">http://www.matronics.com/Navigator?Yak-List
===========
http://forums.matronics.com
===========
le, List Admin.
="_blank">http://www.matronics.com/contribution
===========
--
.. Blitz
Byron M. Fox
80 Milland Drive
Mill Valley, CA 94941
[url=tel:415-307-2405]415-307-2405[/url]
*
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rget="_blank">http://www.matronics.com/Navigator?Yak-List
====================================
http://forums.matronics.com
====================================
le, List Admin.
="_blank">http://www.matronics.com/contribution
====================================
[b]
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brian(at)lloyd.com
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| Posted: Tue Jul 10, 2012 3:48 pm Post subject: QDF-1 AIR START SOLENOID VALVE |
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On Tuesday, July 10, 2012, pnicholson wrote:
| Quote: | --> Yak-List message posted by: "pnicholson" <[url=javascript:;]pednicholson(at)gmail.com[/url]>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a 'psssst' and no prop turning. I'll move the prop, but same issue. If I put a battery charger on, the engine turns over easily. Main air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger problems afoot. |
Byron pointed you in the right direction. Look at the voltmeter when you are starting. If it is at 24v (it should be) and you have the problem , you are looking at either a bad start valve or bad connections to the start valve. If the voltage is below 24 volts then either your a
Battery is bad or the battery is not charging properly. Make sure you have 28v when the generator comes on-line.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
[quote][b]
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GeorgeCoy
Joined: 02 Dec 2010
Posts: 310
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| Posted: Wed Jul 11, 2012 7:29 am Post subject: QDF-1 AIR START SOLENOID VALVE |
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I have found the Yak units to be very voltage sensitive. They become very marginal below 24 volts and usually will not work at all below 20 volts.
George Coy
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Brian Lloyd
Sent: Tuesday, July 10, 2012 7:46 PM
To: yak-list(at)matronics.com
Subject: Re: QDF-1 AIR START SOLENOID VALVE
On Tuesday, July 10, 2012, pnicholson wrote:
--> Yak-List message posted by: "pnicholson" <[url=javascript:;]pednicholson(at)gmail.com[/url]>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a 'psssst' and no prop turning. I'll move the prop, but same issue. If I put a battery charger on, the engine turns over easily. Main air pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger problems afoot.
Byron pointed you in the right direction. Look at the voltmeter when you are starting. If it is at 24v (it should be) and you have the problem , you are looking at either a bad start valve or bad connections to the start valve. If the voltage is below 24 volts then either your a
Battery is bad or the battery is not charging properly. Make sure you have 28v when the generator comes on-line.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA) | Quote: | | http://www.matronics.com/Navigator?Yak-List |
01234567
[quote][b]
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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Jul 11, 2012 7:37 am Post subject: QDF-1 AIR START SOLENOID VALVE |
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Completely agree with George. Even at 22 volts, many of the air start
solenoids struggle.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 7/11/2012 10:27 AM, George Coy wrote:
| Quote: |
I have found the Yak units to be very voltage sensitive. They become
very marginal below 24 volts and usually will not work at all below 20
volts.
George Coy
*From:*owner-yak-list-server(at)matronics.com
[mailto:owner-yak-list-server(at)matronics.com] *On Behalf Of *Brian Lloyd
*Sent:* Tuesday, July 10, 2012 7:46 PM
*To:* yak-list(at)matronics.com
*Subject:* Re: QDF-1 AIR START SOLENOID VALVE
On Tuesday, July 10, 2012, pnicholson wrote:
<javascript:;>>
Gentlemen,
occasionally, I attempt to start my HS6A and am met with a
'psssst' and no prop turning. I'll move the prop, but same issue. If
I put a battery charger on, the engine turns over easily. Main air
pressure is high and constant both tries.
Should I just replace the valve or are there possibly larger
problems afoot.
Byron pointed you in the right direction. Look at the voltmeter when
you are starting. If it is at 24v (it should be) and you have the
problem , you are looking at either a bad start valve or bad
connections to the start valve. If the voltage is below 24 volts then
either your a
Battery is bad or the battery is not charging properly. Make sure you
have 28v when the generator comes on-line.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com <mailto:brian(at)lloyd.com>
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
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mark.bitterlich(at)navy.m
Guest
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| Posted: Wed Jul 11, 2012 8:26 am Post subject: QDF-1 AIR START SOLENOID VALVE |
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As everyone else has already pointed out, there are probably "larger
problems afoot".
Lots of folks replace original Russian or Chinese batteries with a pair
of 12 volt Gel Cells. But after doing so, they rarely check the
condition of those batteries until something ugly happens.
My personal recommendation is that everyone check their batteries with
some kind of load test every Conditional Inspection as a minimum. This
can be something so simple as a 28 volt landing light with two big
alligator clips on it.
You connect a good meter to the battery.. digital volt-meter, what-ever.
Read the voltage. It should be 24 volts DC or even as high as 25.5
volts or so. Do not go out and put a battery charger on your batteries
before you do this test, unless you constantly keep a Battery-Minder on
it anyway. Hook up your landing light to the two batteries at the 24
VDC output. A 250 watt landing light bulb will draw roughly 10 amps.
Leave that light connected and burning bright for about 2-5 minutes.
Watch that digital meter while you are doing this. If after 2-3 minutes
your voltage is down to 18 VDC or less, then your batteries are trashed,
get new ones. Don't replace just one, replace them as a pair.
Lastly, if by some accident, you run your batteries all the way down to
"nothing" (leave the Master Switch on, etc), do NOT "jump start the
airplane", or some other "let's just go flying" excuse. If you take
this kind of short-cut, you stand a good chance of burning something up.
Especially with CJ's equipped with the solid state voltage regulator.
When you do this, the batteries will draw a large amount of current, the
gell cells are not designed for high current rapid charging. You will
damage the batteries, possibly blow some fuses, and also possibly blow
your voltage regulator. This is not conjecture. It's already happened.
Instead use a limited current charger to bring them back, realizing that
even then the batteries are probably not going to work as well as before
you did this move.
This is not a correction to anything anyone else said. All of those
recommendations were valid and spot on.
This is just an addendum with a tad more detail.
Mark
--
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jan.mevis(at)informavia.b
Guest
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| Posted: Wed Jul 11, 2012 9:56 am Post subject: QDF-1 AIR START SOLENOID VALVE |
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Thanks Mark!
Jan
On 11/07/12 18:23, "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E"
<mark.bitterlich(at)navy.mil> wrote:
[quote]
MALS-14 64E" <mark.bitterlich(at)navy.mil>
As everyone else has already pointed out, there are probably "larger
problems afoot".
Lots of folks replace original Russian or Chinese batteries with a pair
of 12 volt Gel Cells. But after doing so, they rarely check the
condition of those batteries until something ugly happens.
My personal recommendation is that everyone check their batteries with
some kind of load test every Conditional Inspection as a minimum. This
can be something so simple as a 28 volt landing light with two big
alligator clips on it.
You connect a good meter to the battery.. digital volt-meter, what-ever.
Read the voltage. It should be 24 volts DC or even as high as 25.5
volts or so. Do not go out and put a battery charger on your batteries
before you do this test, unless you constantly keep a Battery-Minder on
it anyway. Hook up your landing light to the two batteries at the 24
VDC output. A 250 watt landing light bulb will draw roughly 10 amps.
Leave that light connected and burning bright for about 2-5 minutes.
Watch that digital meter while you are doing this. If after 2-3 minutes
your voltage is down to 18 VDC or less, then your batteries are trashed,
get new ones. Don't replace just one, replace them as a pair.
Lastly, if by some accident, you run your batteries all the way down to
"nothing" (leave the Master Switch on, etc), do NOT "jump start the
airplane", or some other "let's just go flying" excuse. If you take
this kind of short-cut, you stand a good chance of burning something up.
Especially with CJ's equipped with the solid state voltage regulator.
When you do this, the batteries will draw a large amount of current, the
gell cells are not designed for high current rapid charging. You will
damage the batteries, possibly blow some fuses, and also possibly blow
your voltage regulator. This is not conjecture. It's already happened.
Instead use a limited current charger to bring them back, realizing that
even then the batteries are probably not going to work as well as before
you did this move.
This is not a correction to anything anyone else said. All of those
recommendations were valid and spot on.
This is just an addendum with a tad more detail.
Mark
--
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