I think you need to push your pump on harder/further.
Weird-University1361 on
Sometimes it helps to wiggle the head to find a good spot.
dsocohen on
Are you sure you don’t have the lock and unlock positions reversed on your pump?
bluerivet on
Also, it looks like your unscrewing the valve insert. You can actually take that top half of the valve off. You need to make sure the tip is all the way down as you have it. But that the core is still screwed in. Also, as others have said, the pump isnt properly connected.
ptchapin on
New tube would probably solve your problem .
TooSlowFlash on
I used to have this problem in my pump, i got around it by using a presta to shrader adapter and pumping it with the shrader socket for my pump.
davejjj on
What pump is that? Are other people using that same pump successfully? I would say get a valve core tool and remove the valve core and then practice with the pump until you get it to work correctly.
ed_toxic21 on
Remove from tire. Cover the presta side of pump head, then pump to engage the presta side. Reattach to tire and pump.
This pump head has both presta and schrader, it automatically engages the one which has resistance, but you tire is flat (no resistance). So you need to trick it by covering the presta side and pumping. Pain in the ass.
endurbro420 on
The pump isn’t even on the valve properly. At 43 seconds you can hear it pull off.
Try using one hand to hold the pump head onto the valve (don’t use the lock lever) and use the other hand to pump.
Mark700c on
In the vid, you pull the locknut up just before you fit the air chuck. That’s the closed position of the valve. Normally, air pressure would pop it open, but perhaps having it set at an angle holds the valve closed. Try holding the chuck square and tight on the valve while the other hand lifts the lock lever
With all the tubeless chatter these days, it’s easy to get a valve stem, or try connecting to a tube by itself.
Soy__Sauce on
You mentioned you got it on Amazon, it might just be a shitty pump. It looks and sounds like the head has a bad seal on the valve so air is just passing around the valve. When it’s in the locked position it should be difficult to pull it off the valve
boopiejones on
Sounds counterintuitive, but don’t unscrew the valve so far. I normally turn the valves about 1.5 to 2 turns from tight and then stick the pump on. Works great every time.
With my first presta bike a couple decades ago, I unscrewed the valve all the way to the end of its travel and experienced the same issues as you. Tried many different pumps, but in the end the problem was the valve being unscrewed too far.
8ringer on
It should not be wiggling like that. I think it’s not seating properly because the threaded portion of the valve stem is bent and getting the pump head stuck.
That being said I had an old pump that I had didn’t like certain presta valves. I never could figure out why but I just replaced the pump head and it worked fine after that.
HikingFun4 on
Put the pump on the Presta valve with the pump lock open/up. Once it is fully on, press the lever down to lock it on.
grumpy8770 on
The rubber in the pump’s valve head needs go to the smooth part of the valve stem, then you flip the lever up and pump.
onehivehoney on
Only need to unscrew valve one turn. Not all the way.
The pump may be the kind where to lock it, the lever points away from you.
ATM it’s only half locked.
Gottabeforreal514 on
Push the Valve as far as you can into the pump while keeping pressure on the tire where the valve is
Remarkable_Bat_7897 on
the valve core damaged, just go to bike shop and find a wasted tire and screw the valve core out.
you bent the valve core at the end of video, it’s not good.
Automatic_Llama on
You’ve gotta sorta finagle those sons of bitches if you’re inflating a completely flat tire. when they’re inflated, the air pressure pushes that little valve out. Then, when you pump it, it pushes the little valve in and lets the air flow in. But it never quite works right when the tire’s completely flat. Best I’ve figured out is to just sorta finesse it a bit lol.
THALLfpv on
Probably not the case, but I’ve over-inflated tires before and had them fail at the base of the valve stem where it merges with the tire.
20 Comments
I think you need to push your pump on harder/further.
Sometimes it helps to wiggle the head to find a good spot.
Are you sure you don’t have the lock and unlock positions reversed on your pump?
Also, it looks like your unscrewing the valve insert. You can actually take that top half of the valve off. You need to make sure the tip is all the way down as you have it. But that the core is still screwed in. Also, as others have said, the pump isnt properly connected.
New tube would probably solve your problem .
I used to have this problem in my pump, i got around it by using a presta to shrader adapter and pumping it with the shrader socket for my pump.
What pump is that? Are other people using that same pump successfully? I would say get a valve core tool and remove the valve core and then practice with the pump until you get it to work correctly.
Remove from tire. Cover the presta side of pump head, then pump to engage the presta side. Reattach to tire and pump.
This pump head has both presta and schrader, it automatically engages the one which has resistance, but you tire is flat (no resistance). So you need to trick it by covering the presta side and pumping. Pain in the ass.
The pump isn’t even on the valve properly. At 43 seconds you can hear it pull off.
Try using one hand to hold the pump head onto the valve (don’t use the lock lever) and use the other hand to pump.
In the vid, you pull the locknut up just before you fit the air chuck. That’s the closed position of the valve. Normally, air pressure would pop it open, but perhaps having it set at an angle holds the valve closed. Try holding the chuck square and tight on the valve while the other hand lifts the lock lever
With all the tubeless chatter these days, it’s easy to get a valve stem, or try connecting to a tube by itself.
You mentioned you got it on Amazon, it might just be a shitty pump. It looks and sounds like the head has a bad seal on the valve so air is just passing around the valve. When it’s in the locked position it should be difficult to pull it off the valve
Sounds counterintuitive, but don’t unscrew the valve so far. I normally turn the valves about 1.5 to 2 turns from tight and then stick the pump on. Works great every time.
With my first presta bike a couple decades ago, I unscrewed the valve all the way to the end of its travel and experienced the same issues as you. Tried many different pumps, but in the end the problem was the valve being unscrewed too far.
It should not be wiggling like that. I think it’s not seating properly because the threaded portion of the valve stem is bent and getting the pump head stuck.
That being said I had an old pump that I had didn’t like certain presta valves. I never could figure out why but I just replaced the pump head and it worked fine after that.
Put the pump on the Presta valve with the pump lock open/up. Once it is fully on, press the lever down to lock it on.
The rubber in the pump’s valve head needs go to the smooth part of the valve stem, then you flip the lever up and pump.
Only need to unscrew valve one turn. Not all the way.
The pump may be the kind where to lock it, the lever points away from you.
ATM it’s only half locked.
Push the Valve as far as you can into the pump while keeping pressure on the tire where the valve is
the valve core damaged, just go to bike shop and find a wasted tire and screw the valve core out.
you bent the valve core at the end of video, it’s not good.
You’ve gotta sorta finagle those sons of bitches if you’re inflating a completely flat tire. when they’re inflated, the air pressure pushes that little valve out. Then, when you pump it, it pushes the little valve in and lets the air flow in. But it never quite works right when the tire’s completely flat. Best I’ve figured out is to just sorta finesse it a bit lol.
Probably not the case, but I’ve over-inflated tires before and had them fail at the base of the valve stem where it merges with the tire.