good afternoon youtube so i have one of these tire inflators and it's got one of these uh pressure
gauge that stick out it's not terribly accurate but i do find this reasonably handy and lately
i've been having trouble that this thing just doesn't seal up against your valve stem you go
to push this down on your valve stem and it leaks air out of the back side of the chuck so this is
like a two-sided tire chuck so like i say this used to work pretty good but now it really leaks
i have pulled it apart you need something like a thin piece of metal to get in here it's kind of
like a screwdriver slot but it's split and you can screw these ends out here there's a little rubber
washer or grommet in here i can get it out it's a tight fit yeah so anyway there's a little rubber
washer in there and then if you flip it over there's two little pins they kind of look like
pop rivets almost and the same thing on the other end there's the screw top
and a rubber grommet in there right in the middle is an air passage my pick is sticking
into that little air passage in the center and it took me a while to figure out how this thing works
what you have are these two pins i was surprised that there were two separate pins like this
i would have thought it would be one solid one show you how this works here you can't see it in
in place of course but these things sit inside the foot of the tire chuck and there's a little gap in
between these and that's where the air passage is so when you hit the air valve on the later
the air goes into the center those two pins push apart and then they seal up against this rubber
washer on the inside and that's your air seal so yeah you've got the air pressure pushing against
the head of this pin holding it against the seal and then if you bring this down onto your
tire valve you've got the valve core in there and that valve core pushes the pin off of the rubber
which opens up and lets air flow out and you push down until the valve stem seals against the rubber
on the other side there's only so much room in there and at some point the bottom pin gets
pushed against the top one the top side here is being pushed in hard against the rubber and
then the bottom one is pushing against the top one and then that opens that gap there and then
this is sealing up there so these washers actually seal on both sides and you can probably see how
they've gotten chewed up there in the middle and like in fact this one is torn you can see where
it's like the rubber is actually torn right there so i was like oh man where do you get new washers
like that well they probably do make rebuild kits for these and i mean you could go out and buy a
new one of these they're not that expensive but one of the products we make we make air hose kits
for tire inflation and deflation so yeah this is one of the tire chucks we use it's what's called
the euro style chuck and it's a self-clamping one you put it on your valve stem like that and then
you let go of that spring-loaded handle and it grabs we use quite a few of these and these things
they're set up with quarter inch pipe thread and they come with these little rubber
grommets or washers inside apparently the purpose of these is if you use this on a straight
pipe thread the threads don't seal so they put a rubber washer in there to seal up on straight pipe
threads now the threads on the fittings we use are npt pipe thread tapered and all you need to do is
put the teflon tape on the threads screw this down and it seals up just like a water pipe we
used to leave these washers in there but we found that sometimes that washer will get twisted up in
here and it plugs up the hole and that blocks your airflow or at least severely limits the
airflow through here so we've been taking these out every time we build an air hose and i've got
a whole bunch of them there's just one box of these and i saved these wasn't sure what they were
good for or if there was a use for them but they looked like they might be useful for something
and when i pulled one of these out it's like you know what those are that's probably what they
used right there i mean it's the same outside same inside it's a little bit thicker but i'm
thinking these were probably a little bit thicker originally and they've just compressed over the
years this thing's probably 25 30 years old so for free i am able to repair this now what i found was
you need to put this top side in it's hard to get this one in because you're you're kind of working
down like that so what i've found is put the rubber washer in there and then tighten this
side down all the way and then you drop your pins in one facing down one facing up and then you take
your other grommet and you gotta get it pushed in all the way so that you can get the thread started
let's see if i can get that going yeah it's just much easier to work on this side but let's
see if i can tighten that up figuring out how this works also explains a problem i had once
because one time i was trying to fill my tire i just changed tires and i'd left the valve core
out and i couldn't get this thing to work it wouldn't fill the tire up without the valve core
and now that i see how it works that pin presses the valve core in to let air in but the valve core
pushes that pin down to let the air in here escape so you actually need both things here you've
got to have something to push that pin down and you've got to have something to push that pin down
and they basically push each other down now without any air pressure you don't really
feel anything it's kind of a weird feeling it's just like this doesn't do anything
but let me hook up my air compressor here here we go i've got the air hose hooked up if i hit
the air lever you heard how it leaked for a little bit and now it doesn't leak it's holding air yeah
so here i have a valve stem just into the top of the bench here so you can see now like there's my
air compressor it's showing like a little over 70 pounds now when i push this on it let the air out
while this is down this side is hard yes that's a really clever little device it's
it's so simple it all works off of air pressure because i always wondered
how this thing could work you see how those pins are loose but yet if you put a little
air pressure now you can see how that thing is is in there solid and if you just push a little bit
yeah so in the past i've i've worked with chucks like this these are just single-sided versions of
this thing but these are a little bit different because there's the pin that pushes down the valve
core but you're only sealing against this outside surface there so these the outside
rubber piece tends to get worn out like this so what i've done with these is you can spin this
top off flip the rubber piece upside down and then you you kind of get a nice fresh face so
this is a plugged valve stem so this shouldn't leak any air and there you go it it holds
it's a pretty neat little gadget and i've now fixed this and it didn't cost anything i'm
really glad i saved all these things because those are just perfect in fact that's probably
the same piece that fits in all of these i have a couple of these i think that are fairly worn out
just proves that holding on to things that look like they might be useful is a pretty good idea
so if there's interest i'll put a link to these on my youtube web page so i've got a
youtube section on my website which you can find the link in the video description and i'll put
a link to order some of these just charge a nominal amount to cover shipping and handling
and we can get some of these out to you and if you need like two of them to fix one of
these i can probably set you up yeah i hope you enjoyed that repair if you have any questions
post up in the comment section below and as always thanks for watching
you