How to lock these together

[dmartin1]

Mods, feel free to move this, I didnt know where to post.


Does anyone have an idea how to lock these nuts together, or keep them from coming loose?

This is the top of a Sanden compressor on a 350. They are very tight, but with vibration the highside can come loose.

I thought maybe someone here would have a slick idea how to tie them together, or stop them from loosening?

[Andy4639]

Loctite thread sealer.


https://www.grainger.com/product/4KL...6ZVKY:20500731

[Mts67C10K20]

If they are not leaking when tight and vibration is the only issue try a drop or removable loctite (blue) on the threads
May do the trick

[Killer Bee]

safety wire.. if you can't find the fittings with holes through the b nuts, they sell jigs cheap to drill them yourself or make one.. wire nut to nut or mount a tab if suitable location is nearby..

good luck!

[brianc636]

Originally Posted by Killer Bee

safety wire.. if you can't find the fittings with holes through the b nuts, they sell jigs cheap to drill them yourself or make one.. wire nut to nut or mount a tab if suitable location is nearby..

good luck!

This.

Safety wiring is amazing when done right and can easily be removed without fear of "over applying" loctite.

[HotWheelsFan]

If the vibration causes the fitting to come loose, that would likely be due to the hose moving around.

Clamp down the hose to something. If you keep the hose from being able to move around there should be no way for the fitting to come loose.

Bob

[dmartin1]

This forum is awesome, Ill re-evaluate my hose mounting. Im looking into the safety wire, thats what i was trying to brain storm.


And believe it or not, i never even thought about loctite.


Thanks guys.

[firedemon]

wouldnt drilling into the compressor side cause a leak . i thought safty wire would have to go through both the nut and bolt or in this case compressor

[Steeveedee]

If it is the fittings attached to the compressor that loosen, simply make a bracket to clamp the two lines together. One can't turn one way, the other can't turn the other way. Not quite as good as lock wire, because the lock wire (done properly) always keeps tension in the tightening direction, but by clamping the lines together, they will not tend to move.

[Killer Bee]

Originally Posted by firedemon

wouldnt drilling into the compressor side cause a leak . i thought safty wire would have to go through both the nut and bolt or in this case compressor

the hole for the wire goes through the corners of the tubing nut where wire can be twisted and tensioned to a fixed point like an anchor tab or another tubing nut if on the same plane.. either way the purpose is to tension the wire where it continuously pulls in the tighten direction.. wire is iusual high strength stainless or inconel.. wire twisting pliers make the deed fast and easy - with a little practice safety wire is common in aircraft, aerial lifts, racing, etc. where tight connections are critical and specs for wire gauge, twists per inch, etc. are required..

these may explain it better

http://www.rv7.us/daily061117_f.htm



http://www.moelleraircraft.com/lockwir1.htm

Jet Tech: Lockwire - YouTube

[Killer Bee]

Originally Posted by Steeveedee

If it is the fittings attached to the compressor that loosen, simply make a bracket to clamp the two lines together. One can't turn one way, the other can't turn the other way. Not quite as good as lock wire, because the lock wire (done properly) always keeps tension in the tightening direction, but by clamping the lines together, they will not tend to move.

this is a viable option.. I have actually seen similar fittings locked with solid brackets so neither could turn.. trombone fittings on our auger booms use welded tabs between two fittings close together so neither can turn

I have experience with safety wire and have the tools, and wire LoL but may be too much hassle for someone not using it frequently..

the hose clamps aren't a bad idea either as HotWheelsFan mentioned above.. stauff makes a wide variety of clever calming solutions..

[Steeveedee]

Originally Posted by Killer Bee

this is a viable option.. I have actually seen similar fittings locked with solid brackets so neither could turn.. trombone fittings on our auger booms use welded tabs between two fittings close together so neither can turn

I have experience with safety wire and have the tools, and wire LoL but may be too much hassle for someone not using it frequently..

the hose clamps aren't a bad idea either as HotWheelsFan mentioned above.. stauff makes a wide variety of clever calming solutions..

I worked on spacecraft for a few years, and some of the things required lock wiring. We always had to design, build and assemble components so that they were in a stress-free condition. Launch loads place a huge strain on components, and if any part has a stress on it, the launch loads will break, unscrew, crack, or do some other damage to it.

[firedemon]

Originally Posted by Killer Bee

the hole for the wire goes through the corners of the tubing nut where wire can be twisted and tensioned to a fixed point like an anchor tab or another tubing nut if on the same plane.. either way the purpose is to tension the wire where it continuously pulls in the tighten direction.. wire is iusual high strength stainless or inconel.. wire twisting pliers make the deed fast and easy - with a little practice safety wire is common in aircraft, aerial lifts, racing, etc. where tight connections are critical and specs for wire gauge, twists per inch, etc. are required..

these may explain it better

http://www.rv7.us/daily061117_f.htm



http://www.moelleraircraft.com/lockwir1.htm





Jet Tech: Lockwire - YouTube

thanks i see now

[Killer Bee]

Originally Posted by Steeveedee

I worked on spacecraft for a few years, and some of the things required lock wiring. We always had to design, build and assemble components so that they were in a stress-free condition. Launch loads place a huge strain on components, and if any part has a stress on it, the launch loads will break, unscrew, crack, or do some other damage to it.

well you know more than all of us how important it is

I've worked on just about everything except submarines and spaceships

I was a K2A3 at BCAG Long Beach for a little stint in the 90's.. did a lot of primary flight controls and landing gear work on next gen 737s brought down from Renton right after the buyout of MD.. safety wire and seal are two things I'll never forget how to do LoL

I stir my coffee at work with a goop spoon

[Steeveedee]

Originally Posted by Killer Bee

well you know more than all of us how important it is

I've worked on just about everything except submarines and spaceships

I was a K2A3 at BCAG Long Beach for a little stint in the 90's.. did a lot of primary flight controls and landing gear work on next gen 737s brought down from Renton right after the buyout of MD.. safety wire and seal are two things I'll never forget how to do LoL

I stir my coffee at work with a goop spoon

Stress-free installation is the same on airplanes! But when things come loose you get to work on them again. Nobody has pliers 20,000 miles long to tweak the fasteners tight again. Is that "Form-A-Gasket" I see stuck to the spoon?