Rebuilt floor jack - leaking

[BElkins]

I recently rebuilt my Snap-on YA642 floor jack and I still have a very minor leak right around the gland nut. This is the 2nd time I've disassembled and reassembled it but I still cannot solve this one, annoying leak.

I used the sealant recommend by Lazzar's that is a weatherstrip adhesive, that stuff is like gorilla snot! Hoping to avoid having to disassemble the pump one more time I'm wondering if there are any wicking sealants that might be of use? The one that comes immediately to mind is green loctite.

Any thoughts from the community? Thank you.

 

[mindheavy]

Sounds like one of the seals might have a cut allowing the leak? I wouldn't think using wetherstrip adhesive to stop a leaking hydraulic cylinder would be a good solution. The seals either seal or they don't. Gooping weatherstrip adhesive or loctite over the leak just covers the problem doesn't it?

 

[BElkins]

Sounds like one of the seals might have a cut allowing the leak? I wouldn't think using wetherstrip adhesive to stop a leaking hydraulic cylinder would be a good solution. The seals either seal or they don't. Gooping weatherstrip adhesive or loctite over the leak just covers the problem doesn't it?

Thank you for the reply. I did not explain myself very well. The leak is between the gland nut and the cylinder where some type of adhesive is definitely needed other than initial manufacturing. If the leak was between the gland nut and ram I would agree that it is the seal.

 

[65ranchero]

I am in a similar situation.
The particular jack I have is leaking between the large nut and the cylinder reservoir which has a plastic (or nylon) tapered seal.
Tried Wurth sealer ( it's the type that is used for cam seals etc. that is applied to the outside of the seal before installing)
Still leaking

 

[nadogail]

While still in High School (Class of 1958}, I learned that Pliobond adhesive (sp?) adhesive, made by the Goodyear Aircraft Corporation, was used as a sealant between parts of engines and automatic transmissions. It has been a long time since I have thought of it and no longer remember which engines and transmissions were involved.

Perhaps the Blue LocTite would seal the threads.

 

[BElkins]

65ranchero, nadogall,

Thank you for the replies! I wasn't sure as to whether or not to try blue loctite on the threads, at least with blue it can be undone at a future point of course if I mistakenly use red the damn thing better not leak as it is not coming apart again (other than with a hot wrench of course).

I will have to check out the Pliobond you mentioned. Just Googled it and found it on Amazon, the packaging is interesting as it looks similar to the layout from the 60's and 70's.

 

[AP514]

IF Gland Nut why not use Tefflon tape ??

 

[FredWanaker]

I had one recently rebuilt. The shop really tightened it so that the seal is tight, and it doesn't collapse on its own yet, but it is getting there. They do a lot of rebuilds, and said this is one way to control leaks on a used jack. I am very happy with the rebuild.

 

[matt_i]

Is the seal just whatever gets cured between the threadforms or does it have an o-ring like a hydraulic cylinder's endcap?

If its the latter, i would offer that the o-ring is damaged or there's rust or other contamination (etc) inside the gland.

 

[Tuc04]

I did a ya642 a few months back and I used Hylomar Blue for sealant. I also torqued the nut back to 400 or more ft/lbs like it was when I started.

 

[LS6 Tommy]

While still in High School (Class of 1958}, I learned that Pliobond adhesive (sp?) adhesive, made by the Goodyear Aircraft Corporation, was used as a sealant between parts of engines and automatic transmissions. It has been a long time since I have thought of it and no longer remember which engines and transmissions were involved.

Perhaps the Blue LocTite would seal the threads.

Dad had a small bottle of Pliobond. Great contact cement for odd applications and a really good sealant, too. It's now made by Ellsworth Adhesives and is marketed as "Pliobond 20".

Tommy

 

[BillK]

I personally would never consider Loctite for a thread sealer. I would use some permatex White Teflon Thread Sealer or something similar. What was on it when you took it apart ?

 

[BElkins]

I personally would never consider Loctite for a thread sealer. I would use some permatex White Teflon Thread Sealer or something similar. What was on it when you took it apart ?

Thank you for all the replies! I'm definitely hesitant to use Loctite of any color for obvious reasons but if I were to use it I would only consider blue since it can be undone.

I never thought about the white Teflon thread sealer. Would you recommend the tape or the paste like formula? I actually really like this idea the more I think about it!! One thing though, if it was seeping around the gland nut threads the oil would be apparent between the ram and the gland nut (plus the seals would have to be bad) but the seeping is occurring between the gland nut and the cylinder. On the other hand, are you suggesting using the white teflon thread sealer around the outside of the gland nut where it meets the cylinder?

I could not tell what was on it after disassembly but it appeared there was some type of black sealant where the gland nut meets the cylinder. The cylinder was a tiny bit rough along the edge but I cleaned it up with a file.

 

[FMB4]

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Loctite 303420 32492 545 Pneumatic and Hydraulic Fittings Thread Sealant.

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[Mick56]

Years ago I was repairing some jacks, and the old guy I got parts from told me to only use the non-hardening brown Permatex between the metal to metal. I never had any leaks

 

[BillK]

I never thought about the white Teflon thread sealer. Would you recommend the tape or the paste like formula?

I was thinking about the paste type.

 

[InsanePyro]

+1 for the paste teflon stuff, gotta let it setup of course