Van's Air Force
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How in the world do you safety this?
- Thread starter cjensen
- Start date
Fuel Drain
I went to my local Aviation Store(AutoZone) and picked up a small mixed bag of fuel hose clips. You know, the type that you slide over the hose holding the clip open with a pair of pliers. When you position it, release the pliers, no possibility of cutting the hose or working loose. Bag of 10 was $4.99.
Mike H 9A/8A
It's shown right on the plans drawing to safety the plastic tubing for the fuel pump overflow/drain tube. But how do you do it?
I went to my local Aviation Store(AutoZone) and picked up a small mixed bag of fuel hose clips. You know, the type that you slide over the hose holding the clip open with a pair of pliers. When you position it, release the pliers, no possibility of cutting the hose or working loose. Bag of 10 was $4.99.
Mike H 9A/8A
David-aviator
Well Known Member
Yep, and if the clamp is a small OETIKER clamp it will never come off for sure.
Sam Buchanan
been here awhile
It's shown right on the plans drawing to safety the plastic tubing for the fuel pump overflow/drain tube. But how do you do it?
You could just eliminate the aluminum tubing and run the nylon tubing all the way to the exit.
Brantel
Well Known Member
Don't want to hijack this thread but exactly what does that overflow do for you? I mean what is its function and how does it work?
Just by looking at it and without taking the pump apart, it looks like some sort of relief in case the diaphram pops in the pump?
What happens if this happens? Stream all your fuel out or ?
Just by looking at it and without taking the pump apart, it looks like some sort of relief in case the diaphram pops in the pump?
What happens if this happens? Stream all your fuel out or ?
IowaRV9Dreamer
Well Known Member
tie wrap on mount?
I don't want to hijack anything either.... but is it "OK" to put tiewraps directly on the engine mount? My A&P uses ADEL clamps there. I asked and he said under vibration they can actually wear the mount tubes. Bogus, or real?
No criticism, just trying to learn
I don't want to hijack anything either.... but is it "OK" to put tiewraps directly on the engine mount? My A&P uses ADEL clamps there. I asked and he said under vibration they can actually wear the mount tubes. Bogus, or real?
No criticism, just trying to learn
az_gila
Well Known Member
It is not good practise...
...to use any ty-raps directly on steel in the engine compartment.
These Piper owners would definitely disagree with your "bogus" claim.
http://forums.piperowner.org/read/4/77290/107867/page=2
Use a wrap of good vinyl tape around the mount before attaching the ty-rap.
...to use any ty-raps directly on steel in the engine compartment.
These Piper owners would definitely disagree with your "bogus" claim.
http://forums.piperowner.org/read/4/77290/107867/page=2
Use a wrap of good vinyl tape around the mount before attaching the ty-rap.
cjensen
Well Known Member
I do wonder why the plans don't point this out...
That is a much better way to do it. Though if the tie is tight, it's not gonna vibrate in to the steel.
Would UHMW tape be appropriate?
cytoxin
Well Known Member
only when the boost pump is on. otherwise it will just trickle.
Actually not bogus. Oil and dirt will eventually wear through the tubing under a tie wrap. I've used a piece of UHMW tape in each location a tie wrap is used on my engine mount. Anyone that has tried to cut or shape UHMW knows how well it resists any kind of wear.
Not bogus,I just put adel clamps on my cessna after finding wear from tye wraps on the motor mount. the tye had worn into the metal enough to leave imprints of the little lines that are on the strap. You can see it and feel it. MY AP/IA said it is NOT a good practice. Looking at the paint removed by the tye and the imprints left by it, even I can tell this is not a good way to fasten stuff to the motor mount. Gene
Here's the deal. Tye/Tie wraps on the engine mount directly are just flatly a NO-NO. If you don't put some chafe tape of some sort under the zip tie, sooner or later it'll start wearing...I can guarantee you that.
So, whether you think it's bogus or not...you can use them on engine mount tubes - BUT do NOT do it direct on the metal. Put a layer of chafe tape under it.
Generally accepted practice by most A&P's is to either avoid zip ties on the engine mounts, or if they do they usually apply some tape under them.
My 2 cents as usual.
Cheers,
Stein
So, whether you think it's bogus or not...you can use them on engine mount tubes - BUT do NOT do it direct on the metal. Put a layer of chafe tape under it.
Generally accepted practice by most A&P's is to either avoid zip ties on the engine mounts, or if they do they usually apply some tape under them.
My 2 cents as usual.
Cheers,
Stein
Shrink Tube
An excellent way to "protect" metal (or anything else) from a tie-wrap is to put shrink tubing over the usable length on the TW before tightening. Add about 1/4" to allow for shrinkage, slip TW in shrink tube, hold at TW clamp end, heat, cool, install.
ff
An excellent way to "protect" metal (or anything else) from a tie-wrap is to put shrink tubing over the usable length on the TW before tightening. Add about 1/4" to allow for shrinkage, slip TW in shrink tube, hold at TW clamp end, heat, cool, install.
ff
Robert M
Well Known Member
It's shown right on the plans drawing to safety the plastic tubing for the fuel pump overflow/drain tube. But how do you do it?
Okay, I'm not this far along in my build but getting closer, what exactly is the game here? Are we trying to keep the protective outter plastic tubing from sliding on the aluminum tubing in order to keep the aluminum tubing from rubbing against the motor mount?
cjensen
Well Known Member
cjensen
Well Known Member
Today I redid the tie wrap in this location with UHMW tape underneath it, and I also figured out the safety wire on the plastic tubing...
Also, taking heed to the advice given in this thread, I removed all the tie wraps that I had on the engine mount (green arrows show where I had tie wraps), and replaced them with Adel clamps...
Thanks all!!
Also, taking heed to the advice given in this thread, I removed all the tie wraps that I had on the engine mount (green arrows show where I had tie wraps), and replaced them with Adel clamps...
Thanks all!!
Here's how I made this drain hose. David Domeier will recognize the hose-barb-to-flare-nut adapter and Oetiker clamps I had left over from my alternative engine days:
This is 3/16" ID automotive fuel hose, not very heavy.
Adel clamps on the engine mount, no tie wraps.
This is a few ounces heavier, I'm sure, but I'm happy with the result. Like Rivethead said, there a bunch of ways to do this.
cheers,
mcb
This is 3/16" ID automotive fuel hose, not very heavy.
Adel clamps on the engine mount, no tie wraps.
This is a few ounces heavier, I'm sure, but I'm happy with the result. Like Rivethead said, there a bunch of ways to do this.
cheers,
mcb
RV7Guy
Well Known Member
I bought a couple of rolls of the silicone tape. A couple of wraps and you're good to go. I even used it under adels.
As I said in a previous post about this very subject, I've had to replace engine mounts in aircraft because of the wear caused by zipties/tywraps secured directly to the mount.
Quoting my own post:
