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OK... I searched everywhere, could not find a definitive answer.

I've had the pump a few years and use it a lot on several bikes. I like my pump and want it to last as long as possible and I'd like to clean and re-grease its innards as a preventive measure, the o-ring specifically but I cannot get to it.... I'm afraid I'll break it

Can anyone tell me how to get the cap off without breaking it? or is there another way? It's a JoeBlow Sport II (the yellow one)

Thanks in advance

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    Welcome to Bicycles @Sylvain. Does cyclelicio.us/2011/bicycle-air-pump-repair or singletrackworld.com/forum/topic/topeak-joe-blow-sport-repair help? It's clearly intended to be serviced, since they sell a Parts Kit
    – andy256
    Commented Jan 24, 2017 at 23:16
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    How about you post some pics that show details not on the websites, such as under the bottom and any screws or threaded parts?
    – andy256
    Commented Jan 25, 2017 at 7:39
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    In my case grease did not work and I replaced the o ring with a R19 which is 23.5 mm internal diameter and 3.m section. I had to buy a kit of 400 O-rings to find this so hopefully this can save someone £10 as one washer should be pence.
    – Zorro
    Commented Jun 24, 2018 at 17:49

1 Answer 1

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Well... I tinkered carefully and was able to remove the top cap without breaking anything.

1) There are 2 small holes on the sides, right above the hose holder clip. You must push in the tab that keeps the top cap secure using a pointy tool and turn the cap slowly clockwise. Here you see it with the tabs disengaged and showing the holes the tabs click into.

enter image description here

2) In the second image, you can see the tabs that hold the cap secure. enter image description here

3) Then I was able to clean the the inside and clean/relube the O-ring (I used Slickoleum because it's O-ring friendly... I use it to service my front suspension). enter image description here

I think this pump is taken apart pretty much like any other cheap to midrange floor pump after all.

I hope this can help someone.

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    Good work. Mark this as the accepted answer.
    – andy256
    Commented Feb 6, 2017 at 2:12

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