Thanks for the quick reply.
When you said "you don't need the grease gun cap on this just fill it half full "
that just made me wonder how an Hydraulic pump works.
After checking youtube for an animation and learning something new.
It certainly makes sense to setup like you said. I used to...
Sorry for ress an old thread, BUT...
I came across this thread as it was on first page on google when searching about converting a grease gun for pumping water.
From my reading reversing the seal seems to be a plausible solution. but no one actually confirmed this. Im wondering if anyone...