Torqued bolts?

Joe Parish · Post by **Joe Parish** » Tue Dec 28, 2010 10:13 pm

I am wondering if anyone is putting anything on there bolts after they are torqued? I do not know what it is called but have seen it used on the plane I rent. They put it on the nut and the thread on the bolt so you know if it has loosened up. I was thinking it would be a good way to know that the bolt was torqued plus if it ever loosened up.

hydroguy2 · Post by **hydroguy2** » Tue Dec 28, 2010 10:20 pm

Torque seal inspection lacquer is what you thinking of. Here's a link

http://www.averytools.com/prodinfo.asp?number=125

When to use it?....depends. I did not use it on every bolt/nut. But did use it when I was torquing things early and I knew it would be a while until I looked at them again. or hard to check bolts. Things like controls get marked, while bolts holding the seatbelts or such may not get marked.

I'm suppose there is a military spec or something that says do it for every bolt always.

smithhb · Post by **smithhb** » Wed Dec 29, 2010 7:43 am

As a Technical Counselor I can tell you that if the nut does NOT have torque sealer, it is considered NOT torqued.

This is a standard to be followed whenever you have bolts that require torquing (WHICH IS EVERY BOLT).

bruceh · Post by **bruceh** » Wed Dec 29, 2010 4:25 pm

Any tips on how to get torque seal on the nuts that are down in between the center fuselage spar carry-through? My fingers aren't that long!

BSwayze · Post by **BSwayze** » Wed Dec 29, 2010 5:41 pm

Some of the castelated nuts that have cotter pins through the castle nut do not get torqued. I'm thinking specifically of the bolts & nuts that hold the brake pedals, master cylinders, and so on. There are others. These bolts can't be too tight or the parts won't move or pivot like they're supposed to. So think it through carefully whenever you have a castle nut and cotter pin. They're there for a reason. This is probably obvious to most but I thought I'd mention it.

BSwayze · Post by **BSwayze** » Wed Dec 29, 2010 5:43 pm

bruceh wrote:Any tips on how to get torque seal on the nuts that are down in between the center fuselage spar carry-through? My fingers aren't that long!

I asked my tech counselor that very question, Bruce! He said not to worry about applying torque seal on those for two reasons. One, you can't reach it as you've pointed out, and two, you'll need to re-torque those after the initial flights because they'll have a tendency to need more torque at that time.

smithhb · Post by **smithhb** » Wed Dec 29, 2010 5:54 pm

bruceh wrote:Any tips on how to get torque seal on the nuts that are down in between the center fuselage spar carry-through? My fingers aren't that long!

Bruce, the standard is that whenever you have a nut that is inaccessible, apply the torque seal to the head and the adjoining surface.

The intent is to be able to see if the bolt is loose enough that it can rotate.