Leaking Gaggia Classic pump

Equipment doesn't work? Troubleshooting? If you're handy, members can help.
tag1260

#1: Post by tag1260 » Jul 11, 2019, 10:41 pm

Anyone ever rebuild a leaking Gaggia Classic pump and get it to stop leaking? After my rebuild I decided to try backflushing my machine and afterwards found the top of my pump leaking. Must have been weak as I followed to backflushing of only 5 seconds run time.

Anyways, there is an o-ring around the top that should be the culprit if I could only fine one (or two but not 50 or 100) it might be an affordable fix vs buying a new pump. I measure 1.5mm x 13mm x 16mm (cs x id x od). Went to my local rubber shop where I get belts and hoses and o-rings and they didn't have anything but could order 100 for me so that made it not worthwhile.

Thinking of trying some silicone sealer.

Think it'll work?

Thanks

User avatar
Jake_G
Team HB

#2: Post by Jake_G » replying to tag1260 » Jul 11, 2019, 10:57 pm

I wouldn't use silicone.

If you've got the dimensions correct, you can order a package of 4 viton O-rings in this size for $4 and change from hoseandfittings.com. Nitrile O-rings would be fine in this application and would be even cheaper, (though you'd probably get 10 for $4 instead of 4 for $1.50).

If you order tomorrow you get free shipping because they're cool like that and ship for free on Fridays.

Cheers!

- Jake

tag1260

#3: Post by tag1260 » Jul 11, 2019, 11:43 pm

Thanks. That makes it worth pursuing.