The maintenance is simple.
I do my floor pumps a couple times a year. But they get used a bunch and by a bunch of different people.
The floor pumps if used daily, do them like 2 times a year. A shop, do them every couple months.
Unscrew the top cap on the main barrel, clean the rubber o rings on the plunger. Take and put on some new grease. Put it back together. For the flip chick, clean it with a q tip or something and when done take some light oil like Tri Flow and lube the o rings.
The biggest issue is keeping things cleaned and lubed.
The smaller pumps have the same issues.
If you are using a floor pump and the handle drops really quickly it’s the main plunger o ring. It needs replaced. When you pull it you can see it looks square vs rounded. There are 3 of the exact same o rings in the pump. The main plunger seal. One floating on the plunger- a top out bumper. And one in the base- a bottom out bumper. They are all interchangeable. So if your handle drops like that, take one of the others and switch them out.
Cleaning out the old grease and putting new grease in will make things last longer. I have had my floor pumps for 3 years and never replaced a part on them. But I do maintenance to them. That’s the key.
Any other questions let me know. Happy to answer them.