Pump Issue

[Lebowski]

This weekend, I noticed my Cabrinha pump was only inflating on the downstroke. On the upstroke, I could feel air coming out the top of the pump. I disassembled it, but I didn't see anything easily fixable in there, although there are a couple of rubber O-rings that might be the problem.

I was wondering if anyone could tell me what was happening and if it is repairable.

Your help is appreciated.

AD

[JRN]

IN ADDITION TO THE O-RINGS, there should be a small valve on the disc in the plunger. It has a membrane which may be stuck open, stuck closed, or failed completely. If you have another pump, compare it to the one that has failed, to pinpoint the problem.

[scottman]

Any sport store usually has the same pump without the brand logo for around $12.00 to $20.00, it's always good to have a spare or two. You should be able to take it apart and check the big disk and make sure it's oiled good, if it get dry it won't work.

[RobH]

IS it a old cab pump with the black knob on top ? If so that can be turned to inflate only on downstroke or both up and down. Otherwise check for rings and apply some greese as suggested

[kiteboymn]

Make sure the inside is clean! one grain of sand will nick the o ring and cause pressure loss.
Then again, where the hell could sand possibly come from?

[Lebowski]

Great suggestions, I'll take a look tonight.

Will also look into a spare pump - seems like a good idea to have another around...

Thanks!

AD

[paul-b]

what is best to lube them with?

[Barry P]

Any kind of oil seems to work. Cooking Oil, Penzoil, Synthetic. I haven't tried tanning oil yet but it would probably work.

Make sure to get all the junk out that collects in there before lubing it up.

[kiteboymn]

Pure silicone spray, inside and on the shaft. (OMG that sounds dirty)
Come on Norman lets hear it!

[JRN]

I tried to wear out my pump handle in Jr. High. Somehow, what is left of it has survived until this day. I don't know, is "ORGY BUTTER" is silicone based?