Type of thread seal?

[BWSwede]

Hello hydraulic gurus,

I will be rebuilding the hydraulic cylinders on my tractor. They all have end caps with internal threads and tubes with external threads. I assume there is a thread seal in there now and I am wanting to use a thread seal as part of the rebuild.

Does anyone have a recommendation for a Locktite (or other) product that is appropriate for the application. I contacted Locktite but they never responded.

(The tubes are about 3.25" diameter if that makes a difference.)

TIA,
Blane

 

[YLee Kioti]

Don't have a direct answer myself, but.......(here it comes rights....lol...)

have you asked any of your local rebuild shops like NAPA and see what they use, if any at all?
Woops, Yeah NAPA makes hoses. Sorry bout that. (on edit)

If they are kind enough to share why, that may help answer your question......

 

[5030]

I use Detroit Diesel Anerobic sealant myself.

 

[/pine]

FWIW
Many (if not all) of the end caps I have removed have o-rings so no thread sealant should be required...

 

[ericm979]

LOCTITE 542 - Thread Sealant - Henkel Adhesives

I've used it on a bunch of NPT fittings. It works well for them.

But yea, if there's an o-ring it probably does not need sealant. It might still need thread locker but the common 242 will work.

 

[BWSwede]

Thanks for the input guys.

Yes, there seems to be 3 to 4 O-Rings inside the cap so I guess I don't need a thread sealant. With that in mind I'll pick up some 242.


Thanks again,
Blane

 

[John0829]

I recently had a hydraulic leak that nothing would stop, new fittings and every brand/type of sealant recommended by folks who know until finally tried some Lotite 567, expensive, but finally not more leak.

 

[RoyKing]

for my pressure washer 3400psi and my tractor 3200psi. I use no.1 hardening Permatex, let dry 24 hrs

 

[wdchyd]

#2 grease on the O-rings......neverseize on the threaded cap/cyl tube threads (only to help take apart 10 years from now)

 

[rswyan]

#2 grease on the O-rings......neverseize on the threaded cap/cyl tube threads (only to help take apart 10 years from now)

That’s the same thing my neighbor - who is a retired heavy equipment mechanic - told me ...