Today's Message Index:
----------------------
1. 06:13 AM - Re: Effects of air tool oil in a CJ pneumatic system (Warren Hill)
2. 06:37 AM - Re: Effects of air tool oil in a CJ pneumatic system (Jan Mevis)
Message 1
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| Subject: | Re: Effects of air tool oil in a CJ pneumatic system |
Jan,
We've been using 95% ethanol (Everclear) purchased from a local liquor store. One
advantage of this type of alcohol is that it has almost none of the common
impurities found in distilled alcohol known as congeners: acetone, acetaldehyde,
propanol, glycols and ethyl acetate. I guess the Russian mechanics found other
advantages as well.
Perhaps Doug Sapp could offer a few comments on the benefits of adding a small
amount of properly placed 90 to 100 weight oil based on his years of disassembling
/ examining pneumatic valves. Taking these valves apart is really the only
way to know what's happening and Doug probably has more experience than anyone.
The corrosion that I've seen in the Chinese valves after replacing every one in
my CJ was truly impressive. The inside of the main air on / off valve looked
like chocolate pudding mixed with fine sand.
Warren
On May 2, 2012, at 11:33 PM, Jan Mevis wrote:
> The Russians use a 50/50 (volume) mixture of pure glycerine (whatever that is)
and medicinal ethanol (as pure as you can get it).
> During Soviet times, they ordered higher quantities than necessary, allowing
the mechanics to build up a secret stock of alcohol
>
> At least that's what a knowledgeable Russian told me
>
> Jan
>
> From: "brian@lloyd.com" <brian@lloyd.com>
> Date: Thursday 3 May 2012 00:47
> To: "yak-list@matronics.com" <yak-list@matronics.com>
> Subject: Re: Yak-List: Effects of air tool oil in a CJ pneumatic system
>
>
>
> On Wed, May 2, 2012 at 12:36 PM, Bitterlich, Mark G CIV Det Cherry Point, MALS-14
64E <mark.bitterlich@navy.mil> wrote:
>
> They do (have a procedure for putting in glycerin and alcohol).
>
> However, the subject at hand is injecting pneumatic air tool oil.
>
> Something that people on this list have recommended on and off for
> decades.
>
> Glycerin/Alcohol
>
> Pneumatic Air Tool Oil.
>
> Two different topics.
>
> Uh, no. Here's how I read it:
>
> "I lubricated my pneumatic system with air tool oil. It hosed up all my check
valves by rotting out the rubber."
> <Natural follow on -- > "Here is the stuff we are supposed to be using as recommended
by the builders of the airplane -- glycerine and alcohol."
>
> See? Obvious connection. And I bet there were several people on here who didn't
realize that glycerine and alcohol is the proper lube for the pneumatic system.
The thing I didn't remember was the ratio of glycerine to alcohol and the
proper quantity to be injected into the system. I was hoping to jog someone's
memory into providing the missing piece.
>
> But I know that I have parroted the, "lube the pneumatic system with air-tool
oil," party line in the past. Bad on me. But I did remember that there was an
official alternative and thought I would remind people. Sorry. It was a case
of me stepping out of character and trying to be helpful. I'll shut up now. ;-)
>
> --
> Brian Lloyd, WB6RQN/J79BPL
> 3191 Western Dr.
> Cameron Park, CA 95682
> brian@lloyd.com
> +1.767.617.1365 (Dominica)
> +1.916.877.5067 (USA)
>
>
>
> ww.matronics.com/Navigator?Yak-List
> com
> ronics.com/contribution
>
>
>
>
>
> http://www.matronics.com/Navigator?Yak-List
>
> http://forums.matronics.com
>
> http://www.matronics.com/contribution
>
>
>
Message 2
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| Subject: | Re: Effects of air tool oil in a CJ pneumatic system |
Thanks for the information shared, Warren.
I can testify (I witnessed it several times) that the Russian and
Lithuanian mechanics use a 50/50 mixture, but in very small quantities,
about 1 or 2 cubic centimeters, and they inject it with a needle into the
actuators. The medicinal ethanol I referred to is what we buy in a
drugstore (pharmacy). It's 95% ethanol, indeed. I usually get the
glycerine from the same pharmacy or drugstore, but some time ago, someone
on this list mentioned the existence of quite a few different types or
qualities of glycerine.
Here in Europe we have to overhaul these actuators on a regular basis (600
hours or 5 years, I think).
Jan
On 03/05/12 15:10, "Warren Hill" <k7wx@earthlink.net> wrote:
>
>Jan,
>
>We've been using 95% ethanol (Everclear) purchased from a local liquor
>store. One advantage of this type of alcohol is that it has almost none
>of the common impurities found in distilled alcohol known as congeners:
>acetone, acetaldehyde, propanol, glycols and ethyl acetate. I guess the
>Russian mechanics found other advantages as well.
>
>Perhaps Doug Sapp could offer a few comments on the benefits of adding a
>small amount of properly placed 90 to 100 weight oil based on his years
>of disassembling / examining pneumatic valves. Taking these valves apart
>is really the only way to know what's happening and Doug probably has
>more experience than anyone.
>
>The corrosion that I've seen in the Chinese valves after replacing every
>one in my CJ was truly impressive. The inside of the main air on / off
>valve looked like chocolate pudding mixed with fine sand.
>
>Warren
>
>
>On May 2, 2012, at 11:33 PM, Jan Mevis wrote:
>
>> The Russians use a 50/50 (volume) mixture of pure glycerine (whatever
>>that is) and medicinal ethanol (as pure as you can get it).
>> During Soviet times, they ordered higher quantities than necessary,
>>allowing the mechanics to build up a secret stock of alcohol
>>
>> At least that's what a knowledgeable Russian told me
>>
>> Jan
>>
>> From: "brian@lloyd.com" <brian@lloyd.com>
>> Date: Thursday 3 May 2012 00:47
>> To: "yak-list@matronics.com" <yak-list@matronics.com>
>> Subject: Re: Yak-List: Effects of air tool oil in a CJ pneumatic system
>>
>>
>>
>> On Wed, May 2, 2012 at 12:36 PM, Bitterlich, Mark G CIV Det Cherry
>>Point, MALS-14 64E <mark.bitterlich@navy.mil> wrote:
>>Point, MALS-14 64E" <mark.bitterlich@navy.mil>
>>
>> They do (have a procedure for putting in glycerin and alcohol).
>>
>> However, the subject at hand is injecting pneumatic air tool oil.
>>
>> Something that people on this list have recommended on and off for
>> decades.
>>
>> Glycerin/Alcohol
>>
>> Pneumatic Air Tool Oil.
>>
>> Two different topics.
>>
>> Uh, no. Here's how I read it:
>>
>> "I lubricated my pneumatic system with air tool oil. It hosed up all my
>>check valves by rotting out the rubber."
>> <Natural follow on -- > "Here is the stuff we are supposed to be using
>>as recommended by the builders of the airplane -- glycerine and alcohol."
>>
>> See? Obvious connection. And I bet there were several people on here
>>who didn't realize that glycerine and alcohol is the proper lube for the
>>pneumatic system. The thing I didn't remember was the ratio of glycerine
>>to alcohol and the proper quantity to be injected into the system. I was
>>hoping to jog someone's memory into providing the missing piece.
>>
>> But I know that I have parroted the, "lube the pneumatic system with
>>air-tool oil," party line in the past. Bad on me. But I did remember
>>that there was an official alternative and thought I would remind
>>people. Sorry. It was a case of me stepping out of character and trying
>>to be helpful. I'll shut up now. ;-)
>>
>> --
>> Brian Lloyd, WB6RQN/J79BPL
>> 3191 Western Dr.
>> Cameron Park, CA 95682
>> brian@lloyd.com
>> +1.767.617.1365 (Dominica)
>> +1.916.877.5067 (USA)
>>
>>
>>
>> ww.matronics.com/Navigator?Yak-List
>> com
>> ronics.com/contribution
>>
>>
>>
>>
>>
>> http://www.matronics.com/Navigator?Yak-List
>>
>> http://forums.matronics.com
>>
>> http://www.matronics.com/contribution
>>
>>
>>
>
>
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