Maybe you already learned this the hard way. If not, trust me, you
will want to know.

If the knob on the pumping handle is loose, DO SOMETHING ABOUT IT!

Mine came off and, as I tried to screw it back on, the handle
disappeared inside the pump. The only way to get it out is to take
the pump off the base which will be in mid pumping cycle (let your
imagination run wild). The lengths of the handle is such that it must
be EXACTLY centered as the piston rings go in. Since one side of the
first ring will always go in first, the handle will never be centered
in the hole. Already frustrated by trying to get out the screws that
Groco located in such a way that no screwdriver can reach one of them,
you will spend the next 45 minutes hunched over with your hands
covered with that Teflon grease that Peggie likes so much (since this
is a good opportunity to to that job), and everything that wasn't
pumped, trying to get the magic combination of pushing and pinching
that will get the piston back in. Then 20 minutes of screwing in the
innermost screw in 3 degree increments with a right angle screwdriver
taking the bit out for each change in angle. Add in a hot day and a
tight schedule any you have a wonderful start to the day.

One word: LOCKTITE!

--

Roger Long