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Can someone help me with a Loctite question?

TomB19

Well-known member
Joined
Jan 1, 2015
Messages
547
Location
Regina, SK, Canada
I have some important axle bolts that need locktite.

When I pulled the old shaft, I immediately cleaned up the bolts with WD40. That's just how I do it.

Later, when I applied Locktite Blue, I realized the WD40 film (wiped off with a clean rag) might impede the hold of the Loctite glue.

I installed the bolts but wonder if I should pull them and re-do them. I don't want an axle falling off at highway speed.

Any advice would be appreciated. :thumbup:
 
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Joined
Jun 30, 2011
Messages
1,080
Location
AZ
Parts need to be clean and dry.

Need to clean with alcohol, acetone, or disc brake cleaner before applying loc-tite.
 

MoonRise

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Joined
Nov 5, 2010
Messages
4,031
Location
NJ
I want to know who was the genus that put the red in the blue bottle and blue in the red bottle.

I hear you, but in this case it is because you are dealing with two different companies.

Permatex puts their threadlockers in blue bottles.

Loctite puts (most of) their threadlockers in red containers. So Loctite blue 242 (or the 'new' version 243) is in a red bottle. So is Loctite 'red' 263, or 'green' 290, or 'purple' 222MS, etc.

:beer:

As to the OP, yeah, clean the oil/grease/antiseize/WD40 off before applying threadlocking compounds.

For something 'critical', RTFM and see if you also need primer or activator as well. Depending on what material(s) you are dealing with and just how 'critical' the application is.
 

PapaBrad

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Joined
Jun 27, 2016
Messages
2
Location
Willamette Valley, Oregon
They're right, clean off the residue. WD is solvent based, and leaves a film.
I use an old spray bottle top and screw it right on a bottle of 91% (70% works too, just takes longer to dry) rubbing alcohol, then spray parts clean. (It also works great as a brake parts cleaner)
The alcohol dries quickly, and I've never had loctite work better!
 
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Sundodger

Active member
Joined
Jun 8, 2016
Messages
30
Location
Washington
In addition to what others have said, adding lube to your joint will change the tq/tension relationship. So if your tq spec is set to a dry clean joint you might elongate the bolt more or possibly even break it if you don't adjust your tq spec.


Note: All of the liquid loctite products I have tested, none have changed the tq/tension relationship of the joint. Which is impressive, I can only imagine the amount of time and money it took to develop that. Lock patches are another story..,
 
Last edited:

Jake C

Well-known member
Joined
Dec 7, 2015
Messages
138
Location
Washington
I always take the bolts to a wire wheel to get the threads all cleaned up and dry, then spray them down with brake clean, blow them off and then put thread locker on.
 
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