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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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 Posted: Fri Feb 24, 2006 3:54 pm Post subject: Hose Clamps |
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| For those who have not yet used safety wire for hose clamps.
Folks,
If the proper size and type hose clamp is used for the application,
the hose clamp will work much better than safety wire.
SS hose clamps come in different diameters, but they also come in
different width bands. Doesn't take a whole lot to properly clamp a
hose is it is done correctly.
john h
MKIII/912ULS (with hose clamps) 
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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rsanoa
Joined: 10 Jan 2006
Posts: 71
Location: Bell Buckle,TN
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| Posted: Fri Feb 24, 2006 4:19 pm Post subject: Hose Clamps |
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Gotta agree with John. I get nervous thinking about using safety wire on plastic hose. Pick your clamp carefully to size and width as J. says and you will never have a problem. Don't go to Wal mart and a limited selection. Go to a large hardware or a major Auto Supply house and you should find the exact number needed.
John Hauck <jhauck(at)elmore.rr.com> wrote:
| For those who have not yet used safety wire for hose clamps.
Folks,
If the proper size and type hose clamp is used for the application,
the hose clamp will work much better than safety wire.
SS hose clamps come in different diameters, but they also come in
different width bands. Doesn't take a whole lot to properly clamp a
hose is it is done correctly.
john h
MKIII/912ULS (with hose clamps)
---------------------------------
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Ray S.Anderson |
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slyck(at)frontiernet.net
Guest
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| Posted: Fri Feb 24, 2006 4:42 pm Post subject: Hose Clamps |
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If fastidiously (hoo boy, got by spel chek) done, safety wire will do
a safe
clamp job. Spiral clamps are a whole lot easier, especially if you
want to
disconnect the joint with any frequency. Go to the plumbing dept at
Lowes.
They have the narrow band type in "all stainless". The cheaper ones
have a plated worm that may rust. I replace my throw-away gas filter
from
Auto Zone every year. Two clamps.
-BB do not archive
On 24, Feb 2006, at 6:54 PM, John Hauck wrote:
| Quote: |
| For those who have not yet used safety wire for hose clamps.
Folks,
If the proper size and type hose clamp is used for the application,
the hose clamp will work much better than safety wire.
SS hose clamps come in different diameters, but they also come in
different width bands. Doesn't take a whole lot to properly clamp a
hose is it is done correctly.
john h
MKIII/912ULS (with hose clamps)
|
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Fri Feb 24, 2006 6:32 pm Post subject: Hose Clamps |
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If you are talking about using hose clamps on rubber fuel line then you
are correct.
If you are talking about using hose clamps on urethane fuel line tubing,
then I disagree. Hose clamps will not work better.
The worm gear hose clamp will always have a portion of the clamping arc
that does not properly conform to the rigid tube that the clear urethane
tubing is being clamped to. Even the smallest worm gear hose clamps are
designed for fuel tubing fittings larger than the 1/4" size that is
commonly used on many Rotax fuel systems. This is an inherent design
flaw of a worm gear hose clamp.
I just came back from the garage where I have a box full of hose clamps
that came off my Kolb. Some of the say "TRIDON", some them have no name,
and some say "MEXICO." Slipped them over a fresh length of 1/4" yellow
Tygon fuel line and ran them down until they just got snug, slipped them
off and looked at them. None of them are round, they all want to deform.
All of them have about 20% of their arc that is the wrong diameter arc,
that is where the worm gear is. On a larger diameter fuel line, they
would not do this as badly. But on a 1/4" fuel line, they distort badly.
Stainless safety wire is the best way to secure clear (or colored - ie
Tygon) fuel tubing. As Jack Hart points out in his post on the topic, it
is easy enough to add more than one wire wrap per fitting, as some
fittings have several barbs, and having a separate wire wrap per barb
becomes totally fail safe.
One final note - Good quality black rubber fuel line lasts longest. And
works well with hose clamps. If you use clear fuel tubing, use only use
clear urethane fuel tubing, or tygon fuel tubing, or fuel tubing sold as
such by reputable u/l dealers. Using clear vinyl or plastic tubing sold
in hardware stores is a good way to get killed. It is also possible to
buy nylon locking fuel line clamps that you squeeze into place around
the tubing, and the little teeth of the clamp slip over each other and
lock together - these are susceptible to getting brittle and breaking -
with no advance warning. Avoid them like the plague.
Richard Pike
MKIII N420P (420ldPoops)
John Hauck wrote:
| Quote: |
| For those who have not yet used safety wire for hose clamps.
Folks,
If the proper size and type hose clamp is used for the application,
the hose clamp will work much better than safety wire.
SS hose clamps come in different diameters, but they also come in
different width bands. Doesn't take a whole lot to properly clamp a
hose is it is done correctly.
john h
MKIII/912ULS (with hose clamps)
|
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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Possum
Joined: 12 Jan 2006
Posts: 112
Location: Georgia
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| Posted: Fri Feb 24, 2006 7:21 pm Post subject: Hose Clamps |
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At 09:29 PM 2/24/2006, you wrote:
| Quote: |
The worm gear hose clamp will always have a portion of the clamping arc
that does not properly conform to the rigid tube that the clear urethane
tubing is being clamped to. Even the smallest worm gear hose clamps are
designed for fuel tubing fittings larger than the 1/4" size that is
commonly used on many Rotax fuel systems. This is an inherent design
flaw of a worm gear hose clamp.
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I found some small "t-bolt clamps" that won't pinch the fuel line
like these: but smaller.
http://store.qualitydist.net/tboltclamps.html
I'll have to look at the hanger and see if I can find the box.
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beauford(at)tampabay.rr.c
Guest
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| Posted: Sat Feb 25, 2006 6:38 am Post subject: Hose Clamps |
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Kolbers:
This thread raises a couple of questions I haven't seen addressed yet...
1. I have read that black rubber lines are fine with pure gasoline, but not
OK with pre mix...
The inner lining eventually delaminates and then disintegrates. I
personally experienced this
with a Gates rubber line... it put a large number of tiny black rubber
particles and several
good size (matchead size) chunks of rubber into the clear plastic fuel
filter when it began to break down...
Had I not been using a clear filter, I never would have caught it. The line
was in service
about 8 months when this happened.
2. Re stainless safety wire... Haven't seen anyone mention putting short
protective sleeves
of the next larger size tubing... an inch or so long... over the
connections of urethane or tygon
before wrapping them with the safety wire. An Aircraft Spruce guy suggested
this to me
one time... He said it was widely done with good results and gave stout
connections without
the danger of cutting into the line... I'm doing it... I tested the lines
by pulling on them.
They will literally break before they can be pulled off...
Whaddya think...?
Beauford
FF #076
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jbhart(at)onlyinternet.ne
Guest
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| Posted: Sat Feb 25, 2006 7:04 am Post subject: Hose Clamps |
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At 09:44 AM 2/25/06 -0500, you wrote:
| Quote: |
Kolbers:
This thread raises a couple of questions I haven't seen addressed yet...
1. I have read that black rubber lines are fine with pure gasoline, but not
OK with pre mix...
......................>
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Beauford
If the hose rubber is made from Neoprene, it will not be affected by pre mixed fuels.
Jack B. Hart FF004
Winchester, IN
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by0ung(at)brigham.net
Guest
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| Posted: Sun Feb 26, 2006 7:59 am Post subject: Hose Clamps |
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1. I have read that black rubber lines are fine with pure gasoline, but not
OK with pre mix...
The inner lining eventually delaminates and then disintegrates. I
personally experienced this
with a Gates rubber line... it put a large number of tiny black rubber
-------------------------
The black rubber fuel line that came with my boat has been in service for
over 15 years. When I have removed it from one of the fittings and looked in
side it looks like new. For a while I ran a clear fuel screen between the
squeeze pump and the engine and used some black fuel line purchased at the
local auto supply store. It would break down in short order, a year or two
is all I could get out of it. I never noticed the delamination, but it
would start to leak with pinholes through the sidewalls of the tubing. I
tried a few times then went back to the original tubing and have not had
trouble since.
I guess the moral of the story is ,,,,,, if you are using premix, buy
your fuel line at a marine supplier. And tell them it is for premix.
Boyd Young
mkIII
Utah
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