Using Needle to lube U-joint
User132384
The zirc fitting on the u-joint in my car is so awkward that I can't
get a normal grease gun fitting onto it straight. I've heard that a "needle"
adapter is the way to go. But how does the grease stay in the ujoint if you
use a needle? I imagine you would push the needle around the ball in the zirc
fitting, then pump grease in, but seems the grease would come right out around
the needle since there would be an opening there ?
Wow the heck do you use the needle to grease the u joint ?
Thanks
el Diablo
"User132384" <user1...@aol.commissary> wrote in message
news:20041122115347...@mb-m05.aol.com...
You push the needle in the neoprene seals at all four of the crosses and
pump with grease. When the needle is removed the neoprene will close up and
the grease will not come out.
Brian
Mike Romain
fitting come standard with my the u-joints for my front axles and can be
ordered separate. I also can order u-joints with the zircs or small
bolts or needle fittings in the ends of the caps.
The zirc unscrews and the other fitting just goes in. You can also
unscrew the zirc and get a pointy gun fitting like a fat needle
fitting. This will come up against the hole opening allowing the grease
to be pushed in fine. You then put the zirc or a small bolt back in to
hold the grease.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
User132384
>pump with grease. When the needle is removed the neoprene will close up and
>the grease will not come out.
>
>Brian
Thanks. But I hate that there will now be a hole in the seal, though. But if
that's the only way....
User132384
poke it right into the neoprene, leaving a small hole, which tightens up after
the needle comes out, and hopefully doesn't allow water to get inside ?
the fly
wrote:
>You push the needle in the neoprene seals at all four of the crosses and
>pump with grease. When the needle is removed the neoprene will close up and
>the grease will not come out.
>
That will damage the rubber seals and let water in. It's not
that kind of needle.
The needle fitting for a grease gun is used to depress the
ball in a zerk, so that the taper of the needle seals against the hole
where the ball resides. You then inject grease through the zerk
fitting in the normal way.
the fly
wrote:
>
> The zirc fitting on the u-joint in my car is so awkward that I can't
>get a normal grease gun fitting onto it straight. I've heard that a "needle"
>adapter is the way to go. But how does the grease stay in the ujoint if you
>use a needle? I imagine you would push the needle around the ball in the zirc
>fitting, then pump grease in, but seems the grease would come right out around
>the needle since there would be an opening there ?
You don't push the needle AROUND the ball, you just push the
ball straight in. The taper of the needle seals against the hole
where the ball sits. Then you just inject grease through the zerk in
the normal way.
Mike Romain
be poking holes in them. They will not heal. Just get the right
fitting for the u-joint and needle. It only takes a minute to swap
them.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
JR
the zirk and inject, is not used to puncture the seal. I believe I got mine at
Advance or NAPA, but can't find a pic of it on their site.
JR in NC
http://www.farm-home.com/ldr/JB20215216.htm
el Diablo
"User132384" <user1...@aol.commissary> wrote in message
This is the type I'm referring to,
http://media.doitbest.com/products/573150.gif it's used where you don't have
a grease fitting or can't get to it.
Brian
User132384
the fly
wrote:
>This is the type I'm referring to,
>http://media.doitbest.com/products/573150.gif it's used where you don't have
>a grease fitting or can't get to it.
>
>Brian
>
If you're reduced to using that type of needle, you're better
off not trying to lubricate the joint at all.
The "needle" fitting for lubing through zerk fittings is about
3/16" diameter, with the end tapered in a cone shape, down to a hole
about 1/32" diameter. The big end pushes onto the normal nozzle of
the grease gun, and the tapered end is pushed into the ball seat of
the zerk.
r...@txol.net
There are two types of grease gun needles.
The kind you are thinking of actually looks like a hypodermic horse needs, with
a zirk fitting on the end. This is for those dust-boot punctures and is a last
resort.
The kind you want is thicker, something like 1/8" with a sharp taper to the
comical end. It usually attaches via screw threads and replaces the grease gun
coupler. Like this:
http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611787000
You just depress the ball, and pump. The cone seals the opening until you
release the ball.
Texas Parts Guy
Kevin Bottorff
news:41a4e356...@news2.txol.net:
> http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611787
> 000
they make one that is just a adapter to the reg grease gun. you don`t have
to screw it on at all it just pops on the reg end. KB
--
ThunderSnake #9 Warn once, shoot twice
460 in the pkup, 460 on the stand for another pkup
and one in the shed for a fun project to yet be decided on