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mdnanwelch7(at)hotmail.co
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 Posted: Sat Feb 05, 2011 10:53 am Post subject: Kolb list: brake capliper |
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Mr. Bob,
Hmmm? You might have mentioned this earlier!! haha Yep, that's what I did, use the
teflon tape. I think one thing that compounded the problem is that the "puck housing"
was a cast unit, and when it was machined for the various needs like mountig holes, puck
recepicle, etc., they drilled out the NPT holes too close to the edge.
This only left about 1/16" of meat on the sides of the hole.
I suppose this might be beefy enough if you knew when to stop cranking in the fitting,
of if you knew that the casting was going to crack, you could stop, but unfortunately
you don't know this stuff until it's too late. The squirting brake fluid is a dead give-away!!
The good news is it's a really simple part. The original piece is a cast unit, but carving
a new one out of solid aluminum ought to be fairly easy. Since the puck simply presses
on the back of flat brake pad, if it's off by a 1/16" in any direction, it isn't going to hurt a thing.
Plus, when I duplicate the part, I'm going to be sure and give the NPT holes some extra
edge distance....more like 3/16" minimum.
Plus, next time, I'll find my container of pipe thread sealer, too!!
Mike W
From: slyck(at)frontiernet.net
Subject: Re: Kolb list: Pitot probe
Date: Sat, 5 Feb 2011 13:18:11 -0500
To: kolb-list(at)matronics.com
A word of caution to those who may encounter it: (Mike, not necessarily you). ---never use teflon tape on a tapered, pipe type fitting going into a casting. I learned that painful lesson many years ago.
Stick with old fashioned permatex or a similar product.
BB
On 5, Feb 2011, at 9:36 AM, Mike Welch wrote:
[quote] Pat,
Cutting off the probe is not possible. I have a Dynon EFIS probe, with the
built-in AOA sensor port. It is exactly like this one;
http://www.dynonavionics.com/images/AOA_new_unheated.jpg
I added my own extension, to get it down low enough to not
be affected by diverted air from the nosecone. (see photo)
Besides, I've already relocated it.
Now, I'm on to my next fiasco!!! My brake caliper leaked yesterday when I
tried to bleed the brake system on the left one. The 1/8" NPT ports cracked
as I tried to tighten the fittings. Crap!! Plus, the discs brakes have NO identifying
marks, writing, numbers, anything. I suspect my disc brakes are from a company
no longer in business. I got the complete kit; discs, rotors, axles, bearings, wheels, etc)
I got them in trade a few years ago. Nice parts, and all, but
there is no way of knowing who the company is that made them!!
Doesn't look like it should be too hard to duplicate the "puck holder" as they call it.
I've got master machinist Rick G giving me pointers.
>Pat
<airspeed pitot mount 003.jpg>
arget=_blank>http://www.matronics.com/Navigator?Kolb-List
ttp://forums.matronics.com
=_blank>http://www.matronics.com/contribution
[b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sat Feb 05, 2011 11:55 am Post subject: Kolb list: brake capliper |
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Stick with old fashioned permatex or a similar product.
BB
BB/Gang:
I have been using Aviation Permatex No. 2 since my Model A Ford days in the
mid-1950's. Probably same formula. Sure has the same look and smell as it
did back then, 55 years ago.
Had to run downstairs and check - Permatex Form-A-Gasket Part No. 2B, in a
tube. I also have a 16 oz container of Aviation For-A-Gasket Sealant
Liqauid Part No. 3B. I intend to use the 3B to put a 1936 John Deere D
radiator and engine back together. Probably take the whole 16 oz. The
engine is a 520 cu in two cylinder. That's 260 cubes a cylinder. High idle
and max power is obtained at 900 rpm. Yes, it is hand start. Only thing
electric on it is the spark the magneto generates. Sorry. Got carried
away. Easy to do with something you love.
I also use Permatex on my airplane and 912ULS.
john h - Wishing for Spring.
mkIII
Titus, Alabama
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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slyck(at)frontiernet.net
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| Posted: Sat Feb 05, 2011 2:13 pm Post subject: Kolb list: brake capliper |
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AHA! gotcha!. the offishall Kolb PC police hereby declare that post not entirely true to our bylaws.
well, sure I gotta backtrack a little, as I was the instigator. Truth is that old permatex, in spite of it being made of mostly
pine resins and alcohol, has never failed me. Low tech.
BB, geothermal heat pump compressor crapped out early this morning. Space heater time.
good thing the refrigeration supply was open. Getting a little old for this kind of thing.
ouch, my achin' back
MkIII, covered with sawdust
On 5, Feb 2011, at 2:38 PM, John Hauck wrote:
| Quote: |
Stick with old fashioned permatex or a similar product.
BB
BB/Gang:
I have been using Aviation Permatex No. 2 since my Model A Ford days in the
mid-1950's. Probably same formula. Sure has the same look and smell as it
did back then, 55 years ago.
Had to run downstairs and check - Permatex Form-A-Gasket Part No. 2B, in a
tube. I also have a 16 oz container of Aviation For-A-Gasket Sealant
Liqauid Part No. 3B. I intend to use the 3B to put a 1936 John Deere D
radiator and engine back together. Probably take the whole 16 oz. The
engine is a 520 cu in two cylinder. That's 260 cubes a cylinder. High idle
and max power is obtained at 900 rpm. Yes, it is hand start. Only thing
electric on it is the spark the magneto generates. Sorry. Got carried
away. Easy to do with something you love.
I also use Permatex on my airplane and 912ULS.
john h - Wishing for Spring.
mkIII
Titus, Alabama
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sat Feb 05, 2011 2:36 pm Post subject: Kolb list: brake capliper |
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Truth is that old permatex, in spite of it being made of mostly
pine resins and alcohol, has never failed me. Low tech.
BB
BB/Kolbers:
As the matter of fact, the cleanup method for permatex is 188 proof
denatured alcohol.
I know it is difficult to get it off your hands. Usually wears off
eventually. Of course, I have never tried to use 188 proof denatured
alcohol.
john h
mkIII
Titus, Alabama
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Roger Lee
Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.
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| Posted: Sun Feb 06, 2011 8:13 am Post subject: Re: Kolb list: brake capliper |
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Matco (brake company) recommends and uses Loctite 567. It is specifically for tapered threads for your application. I have used it for years on all my tapered threads and have never had a leak.
http://www.rshughes.com/products/079340_56707.html
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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056 |
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