Question About Loctite Thread Sealant 545

[Vic_N]

Got a new 4044R with an SB1174 snowblower on it. All 4 couplers to my 4th and 5th SCVs are leaking. I finally figured out what was wrong. Whoever assembled the snowblower at the dealer failed to use any thread sealant on the NPT fittings to the quick couplers.

So I'm going to fix the problem by applying some 545 to the fittings. My question: what's the best method to remove the oil from the fittings before applying the 545?

FYI...I know it may be stupid but I save my complaining to the dealer for the BIG stuff.

 

[murphy1244]

Acetone or paint thinner will work.

 

[Vic_N]

Acetone or paint thinner will work.

Murph, any issue with residue that remains on the parts after cleaning? I guess a rag would likely do the job, huh? Thanks for the suggestion.

 

[firemanmike69]

Murph, any issue with residue that remains on the parts after cleaning? I guess a rag would likely do the job, huh? Thanks for the suggestion.

Nope but if you want to be really picky locktite makes a primer to use before using the thread sealant

 

[Vic_N]

Nope but if you want to be really picky locktite makes a primer to use before using the thread sealant

I had so much trouble just finding the 545 I think I'll go without the primer. Looks like some mineral spirits and a couple of clean rags. Thanks!

 

[SimS]

Vic;

Loctite makes a thread sealant specifically for NPT threads. #565. I don't know if it really matters that much but they went through the trouble to manufacture it. Also I would recommend the primer. It made a difference for the times that I used it. It has some chemical reaction that facilitates the success of the anaerobic activity of the sealant. The 545 may work just fine. I would use a "dry" solvent like acetone or Wally World brake cleaner to clean the fittings first. Good Luck.

SimS

 

[firemanmike69]

I had so much trouble just finding the 545 I think I'll go without the primer. Looks like some mineral spirits and a couple of clean rags. Thanks!

Honestly I pretty much just use "blue" medium strength on more or less everything I work on including hydraulic fittings that are pipe thread

 

[beenthere]

Vic_N

Whoever assembled the snowblower at the dealer failed to use any thread sealant on the NPT fittings to the quick couplers.

You would be doing the dealer a favor by mentioning that the assembly person is missing this step.
Shouldn't be construed as a complaint that compromises your possible "Big Stuff", IMO.

 

[jgayman]

This is what I use on my hydraulic couplers. Works like a charm, readily available at the local auto parts store and is very inexpensive. For degreasing the threads I simply use brake cleaner spray. Spray on and it dries quickly without any residue.

Permatex 80632 Thread Sealant with PTFE, 4 oz.

 

[kennyd]

This is what I use on my hydraulic couplers. Works like a charm, readily available at the local auto parts store and is very inexpensive. For degreasing the threads I simply use brake cleaner spray. Spray on and it dries quickly without any residue.

Permatex 80632 Thread Sealant with PTFE, 4 oz.

I've used that combination many times myself before I switched to the 3M brand sealant I current use.

 

[Vic_N]

Vic;

Loctite makes a thread sealant specifically for NPT threads. #565. I don't know if it really matters that much but they went through the trouble to manufacture it. Also I would recommend the primer. It made a difference for the times that I used it. It has some chemical reaction that facilitates the success of the anaerobic activity of the sealant. The 545 may work just fine. I would use a "dry" solvent like acetone or Wally World brake cleaner to clean the fittings first. Good Luck.

SimS

I picked up the 545 at Grainger; it was the only place I could find it. I didn't see any 565. I think the 545 should do the job. If I can find the primer today, I'll get some. The brake cleaner also sounds like a good idea. Thanks.

 

[Vic_N]

Honestly I pretty much just use "blue" medium strength on more or less everything I work on including hydraulic fittings that are pipe thread

I'm on the 545 road now, but thanks for your suggestion.

 

[Vic_N]

Vic_N


You would be doing the dealer a favor by mentioning that the assembly person is missing this step.
Shouldn't be construed as a complaint that compromises your possible "Big Stuff", IMO.

Yes, you are correct and I'll let them know. I'm sure they sell a lot of these snowblowers so they're likely sending a lot of leaks out the door.

 

[Vic_N]

This is what I use on my hydraulic couplers. Works like a charm, readily available at the local auto parts store and is very inexpensive. For degreasing the threads I simply use brake cleaner spray. Spray on and it dries quickly without any residue.

Permatex 80632 Thread Sealant with PTFE, 4 oz.

I'm on my way to pick up some brake cleaner spray. This sounds like a great idea to me. Thanks.

 

[Vic_N]

I've used that combination many times myself before I switched to the 3M brand sealant I current use.

Thank you for your feedback!