two other possibilities - check for Shrader set up on the pump head. - 
other possibility is the rubber is hard from oxidation

On Tuesday, September 3, 2013 9:08:04 PM UTC-5, pb wrote:
>
>
> On Friday, August 30, 2013 8:55:04 AM UTC-7, Eric Norris wrote:
>>
>> The hole that the valve fits into seems to be too small. 
>
>  
> The maybe make the hole bigger?  Run gradually larger drill bits through 
> the rubber grommet until you achieve presta valve nirvana?
>  
> Maybe take the whole thing apart first and make sure there isn't some 
> interference which you can't see, behind the hole, and that there's plenty 
> of room for the pump head to receive the intruding presta valve?    
>  
> ~pb
>

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