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Frame pump, Zefal Hp(5 posts)

Frame pump, Zefal HpLone Gunman
Jul 10, 2002 5:43 AM
This old frame pump came with a fixie project I am doing. The pump is advertised on Nashbar site as a dual head pump, schrader/presta. It was set for schrader. I took the pump apart to figure out how to switch it to presta mode. Inside the head was a rubber part that fits around a valve stem that if you reverse it will fit to a presta. After removing it there is a plastic gizmo with a stem that will hold a schrader valve open to let pumped air into the tube. Beyond that was a spring. Do I just remove the plastic gizmo and flip the rubber fitting to turn this into a presta pump? Does the cylinder need a grease lubricant also?
If I remember correctly...biknben
Jul 10, 2002 6:35 AM
I haven't used my HP in a while and longer since I switched the head.

You unscrew the cap and flip both the rubber ring and the plastic piece and put them back in the same order you removed them. I don't remember the spring making any difference.
Zefal HpXjtolleson
Jul 10, 2002 7:31 AM
Yep, that's it. Reverse the gasket only. It isn't a moving part, so doesn't need to be greased (in my experience). Those are great workhorse frame pumps.
Zefal Hp, not HpXLone Gunman
Jul 10, 2002 9:50 AM
You're living in the present. I believe this pump is possible 20 years old and still functions fine. I have to remove the little plastic gizmo in the head to get a presta to fit inside the rubber part that fits over the valve that was flipped over. I was wondering also about lubricating the barrel of the pump. I did that as well with some white grease to improve performance/compression a bit.
Whoopsies, my miss. Glad I'm living in the present though.jtolleson
Jul 10, 2002 12:22 PM