Today's Message Index:
----------------------
1. 01:27 AM - Re: CJ6 Nose strut Oleo kit (maggieannya)
2. 05:39 AM - Hoses (Jill Gernetzke)
3. 07:52 AM - Re: Hoses (Bitterlich, Mark G CIV NAVAIR, WD)
4. 08:52 AM - Re: Re: CJ6 Nose strut Oleo kit (doug sapp)
5. 09:26 AM - Re: Re: Aeroquip Hose (Jim)
6. 05:32 PM - Re: CJ6 Nose strut Oleo kit (Ttail)
7. 10:29 PM - Re: Re: Aeroquip Hose (Walter Lannon)
Message 1
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| Subject: | Re: CJ6 Nose strut Oleo kit |
Ttail wrote:
> Chasing a Nose Gear oleo Seal kit ... can anyone help ? Doug is out of stock
at the moment.
Pls kindly contact me at purchase1@ato-group.com
I will quote for you the exactly price.
--------
This is Maggie from Xi'an Li Chuang Electronics.
We are Nanchang aircraft parts trader in China
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=430957#430957
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Group,
We make complete hose sets for the Yak 52, exchange only.
We also do CJ and Wilga hoses. We do not do L39 or MiG hoses.
We have 3 sets of mandrels for the different fitting/insert combinations we
encounter. The investment in the proper tooling to do the job correctly is
not worth it to most people.
Jill
M-14P, Inc.
Message 3
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Jill, do you flow test the hoses you build? Or do you examine them with a bore-scope?
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of Jill Gernetzke
Sent: Tuesday, September 23, 2014 8:37 AM
Subject: Yak-List: Hoses
Group,
We make complete hose sets for the Yak 52, exchange only.
We also do CJ and Wilga hoses. We do not do L39 or MiG hoses.
We have 3 sets of mandrels for the different fitting/insert combinations we encounter.
The investment in the proper tooling to do the job correctly is not worth
it to most people.
Jill
M-14P, Inc.
Message 4
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| Subject: | Re: CJ6 Nose strut Oleo kit |
All,
I expect the nose gear o/h parts to arrive in 5-7 days, so we should be
able to ship late next week.
Doug
On Tue, Sep 23, 2014 at 1:26 AM, maggieannya <annya_2008@yahoo.com.cn>
wrote:
>
>
> Ttail wrote:
> > Chasing a Nose Gear oleo Seal kit ... can anyone help ? Doug is out of
> stock at the moment.
>
> Pls kindly contact me at purchase1@ato-group.com
> I will quote for you the exactly price.
>
> --------
> This is Maggie from Xi'an Li Chuang Electronics.
> We are Nanchang aircraft parts trader in China
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=430957#430957
>
>
Message 5
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| Subject: | Re: Aeroquip Hose |
I went to a hose place and had them find a straight steel fitting in the
proper metric size for the Chinese hose end. I then inserted a drill bit
shank through the center hole snug (tried different long drill bits
until one fit snugly) with the smooth part exiting out the flare. Then
I welded the bit to the fitting on the pipe thread inlet side (i.e. the
"other side" opposite the flare). I smoothed the end of the extended
bit to a rounded point for inserting into the new hose. Woola. I had a
mandrel for the metric nut with the proper flare that would insert into
the 303 hose. I will post a picture of it after I get out to the hangar.
Jim
On 9/22/2014 10:38 AM, A. Dennis Savarese wrote:
> OH! NOW I see what Bill meant. Thanks for picking that up. Sorry I
> missed it.
> Dennis
> A. Dennis Savarese
> 334-285-6263
> 334-546-8182 (mobile)
> www.yak-52.com
> Skype - Yakguy1
> On 9/22/2014 11:32 AM, Walter Lannon wrote:
>> Hi Dennis;
>> I think you may have missed Bill's point here. If you are
>> assembling an Aeroquip 303 (Parker 111) hose assy. with the 491
>> fitting MODIFIED by replacing the AN "B" nut with a metric "B" nut
>> you will not be able to use the standard mandrel as the threads will
>> not mate.
>> Cheers;
>> Walt
>> PS: Over the years I have replaced (or attempted to replace!) every
>> hose used on the CJ with the MIL-H-8794 standard ( Aeroquip 303 /
>> Stratoflex 111). Each size presents different challenges and
>> different methods of accomplishment. I have not commented on this
>> subject up to now since I would need to review my experience with the
>> --4 size. Suffice to say that Doug's caution is very appropriate
>> and there are numerous other factors that must be considered.
>> *rom:* A. Dennis Savarese <mailto:dsavarese0812@bellsouth.net>
>> *Sent:* Monday, September 22, 2014 4:37 AM
>> *To:* yak-list@matronics.com <mailto:yak-list@matronics.com>
>> *Subject:* Re: Yak-List: Re: Aeroquip Hose
>> Bill,
>> The mandrels for the 491-x fittings have absolutely nothing to do
>> with the B nuts. The mandrel is used to assist in fitting the barrel
>> into the hose. The B nuts that come in the package with the 491-x
>> fittings are loose B nuts that slide over the barrel of the fitting.
>> If you look closely at the fitting, you will see that the B nut is
>> loose. You simply slide the AN B nut off the barrel and replace it
>> with the metric B nut. Enlarge the photo in the link and you will see
>> the B nut is loose on the barrel.
>> http://www.aircraftspruce.com/catalog/appages/aq491.php
>> .
>> I have made dozens of these hoses using the Aeroquip 491-4 and -5
>> fittings with the appropriate size Aeroquip 303-4 and -5 hose and
>> appropriate mandrel.
>> http://www.aircraftspruce.com/catalog/appages/aqmandrel.php
>> Dennis
>>
>> ------------------------------------------------------------------------
>> *From:* Bill vH <billvh@beanddi.com>
>> *To:* yak-list@matronics.com
>> *Sent:* Sunday, September 21, 2014 12:58 PM
>> *Subject:* Yak-List: Re: Aeroquip Hose
>>
>> <mailto:billvh@beanddi.com>>
>>
>> Dennis,
>> I have looked all over (including ACS) and have never found any
>> assembly mandrels that have metric threads allowing you to thread on
>> the metric B-nut and then thread that into the hose.
>> I guess I don't understand why you would even buy a AN 491-X fitting
>> if you were going to use the metric B-nut. I just made my own
>> assembly mandrel with an appropriate size metric bolt on a lathe.
>> What am I missing here?
>> Bill
>>
>>
>> [quote="dsavarese0812(at)bellsout"]Use Aeroquip 303 hose with AN491-x
>> fitting. Throw away the AN nut from the 491-x and use the metric
>> B-nut on the 491-x fitting. Use the appropriate size mandril for the
>> 491-x fitting available from Spruce if you don't already have them.
>> Dennis
>>
>>
>> On Sep 20, 2014, at 3:26 PM, Ernest Martinez wrote:
>>
>>
>>
>>
>> > Has anyone been able to use the Chinese B-Nuts on Flexible hose
>> like Aeroquip 666? I'd like to know what mandrels, etc I would need
>> to make this work.
>> >
>> > Thanks
>> >
>> >
>> > Ernie
>> >
>> >
>> > >
>> > >
>> > >
>> > >
>> >
>> >
>> *
>>
>> href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
>> href="http://forums.matronics.com">http://forums.matronics.com
>> href="http://www.matronics.com/contribution">http://www.matronics.com/c
>> *
>> *
>>
>>
>> *
>
> *
>
>
> *
Message 6
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| Subject: | Re: CJ6 Nose strut Oleo kit |
Goodo Doug
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=431011#431011
Message 7
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| Subject: | Re: Aeroquip Hose |
Hi Dennis, et al;
Did some research to refresh my memory on the CJ air system hose &
fittings, etc. Hard to believe but it was 20 years ago (1994) when
there was no new Chinese hose available.
The above hose & fittings are identified as a size 4. The rationale
for that number is the ID of the hose and the ID of the standard al.
alloy tubing (6 mm X 1 mm) used in the system. Both are 4 mm.
The AN/MS designation of dash (-) 4 might suggest that these are of the
same size and in fact the ID=99s of hose and tubing are indeed
similar to the above. In this case the =93 4 represents the OD
of the standard al. alloy tubing in 1/16th increments.
There the similarity ends.
The Chinese hose is designed for an operating press. to 750 psi. and
likely will approach 1500 before failure. To achieve this without a
steel mesh requires a number of fabric layers and a much larger outer
diameter.
The MIL-H-8794-4 (303-4/ 111-4) is designed principally for medium
press. hydraulics to 1500 psi. with an ultimate in excess of 3000 psi.
These numbers of course decreasing with increasing diameter.
Due to the much larger OD and the corresponding larger size of the
fitting components, replacing the AN nut with the metric nut will
result in a structurally unsafe assembly. The axial load produced by
the internal pressure is reacted at the bearing area of the nut on the
nipple. This is a circular contact surface with an outer dia. of
approx. 3/8=9D and a width of approx. 1/16=9D+ in the
original configuration. That width is reduced to 0.016=9D
(1/64=9D) with the metric nut on the AN nipple. I have not
calculated the actual area reduction but it is severe and unacceptable.
So much for the AN =934 size.
On the other hand the 303-5/111-5 I believe can be quite safely used as
a replacement hose but only using the complete Chinese fitting assembly
and only if the socket and nipple of that assembly are of the later
design as shown in the attached photo. In this configuration with the
slightly smaller OD nipple (8 mm compared to approx. 9 mm for the AN
nipple) the 3000 psi minimum may be compromised a bit.
In the bad old days the hoses always leaked from the socket area after
they had some time on them. The reason was the 7 mm nipple was just
too small. The Chinese tried to fix that by wrapping the nipple with
fabric before screwing it in.
So the =935 will work - with the Chinese fitting! It could be
done with the metric nut on the AN nipple BUT that requires increasing
the hole dia. in the nut and decreasing the OD of the nipple head
resulting in the same problem as the =934 size though not quite as
bad. Not a good idea and why bother! New hoses are available at a
fraction of the price of the AN/MS stuff and are more than adequate for
the rather minimal pressure they are subject to.
I don=99t know when the =9Cnew=99 nipple arrived,
maybe back in the seventies (Doug?) They are a huge improvement and
are probably on all the new stock hoses. I think they are on mine - all
new from Doug and haven=99t leaked YET???
Walt
From: A. Dennis Savarese
Sent: Monday, September 22, 2014 9:38 AM
Subject: Re: Yak-List: Re: Aeroquip Hose
OH! NOW I see what Bill meant. Thanks for picking that up. Sorry I
missed it.
Dennis
A. Dennis Savarese
334-285-6263
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1On 9/22/2014 11:32 AM, Walter Lannon wrote:
Hi Dennis;
I think you may have missed Bill=99s point here. If you are
assembling an Aeroquip 303 (Parker 111) hose assy. with the 491 fitting
MODIFIED by replacing the AN =9CB=9D nut with a metric
=9CB=9D nut you will not be able to use the standard mandrel
as the threads will not mate.
Cheers;
Walt
PS: Over the years I have replaced (or attempted to replace!) every
hose used on the CJ with the MIL-H-8794 standard ( Aeroquip 303 /
Stratoflex 111). Each size presents different challenges and different
methods of accomplishment. I have not commented on this subject up to
now since I would need to review my experience with the =934 size.
Suffice to say that Doug=99s caution is very appropriate and
there are numerous other factors that must be considered.
rom: A. Dennis Savarese
Sent: Monday, September 22, 2014 4:37 AM
To: yak-list@matronics.com
Subject: Re: Yak-List: Re: Aeroquip Hose
Bill,
The mandrels for the 491-x fittings have absolutely nothing to do with
the B nuts. The mandrel is used to assist in fitting the barrel into
the hose. The B nuts that come in the package with the 491-x fittings
are loose B nuts that slide over the barrel of the fitting. If you look
closely at the fitting, you will see that the B nut is loose. You
simply slide the AN B nut off the barrel and replace it with the metric
B nut. Enlarge the photo in the link and you will see the B nut is
loose on the barrel.
http://www.aircraftspruce.com/catalog/appages/aq491.php
.
I have made dozens of these hoses using the Aeroquip 491-4 and -5
fittings with the appropriate size Aeroquip 303-4 and -5 hose and
appropriate mandrel.
http://www.aircraftspruce.com/catalog/appages/aqmandrel.php
Dennis
-------------------------------------------------------------------------
-----
From: Bill vH mailto:billvh@beanddi.com
To: yak-list@matronics.com
Sent: Sunday, September 21, 2014 12:58 PM
Subject: Yak-List: Re: Aeroquip Hose
Dennis,
I have looked all over (including ACS) and have never found any
assembly mandrels that have metric threads allowing you to thread on the
metric B-nut and then thread that into the hose.
I guess I don't understand why you would even buy a AN 491-X fitting
if you were going to use the metric B-nut. I just made my own assembly
mandrel with an appropriate size metric bolt on a lathe.
What am I missing here?
Bill
[quote="dsavarese0812(at)bellsout"]Use Aeroquip 303 hose with
AN491-x fitting. Throw away the AN nut from the 491-x and use the
metric B-nut on the 491-x fitting. Use the appropriate size mandril for
the 491-x fitting available from Spruce if you don't already have them.
Dennis
On Sep 20, 2014, at 3:26 PM, Ernest Martinez wrote:
> Has anyone been able to use the Chinese B-Nuts on Flexible hose like
Aeroquip 666? I'd like to know what mandrels, etc I would need to make
this work.
>
> Thanks
>
>
> Ernie
>
>
> >
> >
> >
> >
>
>
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics
.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
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