How to repair a tire pressure gauge?

Do you know how to change them without losing any air?

 

I think you guys are missing the point a little bit. You shouldn’t lose 10 psi over a few weeks. No need to check 18 tires with a tire gauge every morning on your pre trip. Check your tire pressure with a gauge once every 2-3 weeks if you want. Outside of that, if you are losing tire psi that much and that quick, you have a puncture somewhere and quick kick with your boot or tire thumper will let you know you have a good leak somewhere. That’s the reason for using this method on a daily basis. Nobody gonna do a daily prettily with a tire gauge and all those tires. I think that most of you guys just like to make argument for the sake of it. Use your common sense. Don’t go checking all your tires with a gauge every morning. Use your boot. Unless you like unscrewing all those valve stems.

 

Done, if your wheel covers are secure

 

You said the only time you check the pressure with a gauge was when you swapped a tire out. Which means you check it one time before you remove the bad tire or one time after the new tire has been mounted. So basically you never check your pressure with a gauge.

 

not exactly.
This ain't rocket science; take a thumper and whack the tire and it sounds off - dull thud is a problem.
That counts in my book as "checking your tires."
Nobody sane puts a gage to 18 tires every day. If you do - U possibly have OCD.
I had a problem with Goodyear tires developing cracks in the molded in rings around the sidewalls.
I bought 6 of these and thought it was good to go for awhile. Then about a month later, a blowout.
Thought it was a random event, till I found one low - you guessed it - by thumping it. Leaked thru sidewall.
Long story short, next blowout I took them all off, and while I was dismounting them
you could see the pressure was fracturing all the casing at that ring seam. Goodbye Goodyear.

I always carry a Victorianox, (The good brand,) Swiss Officers Knife - It has a fishhook removal tool.
I took a cutoff wheel and ground notch in tip to fit side recesses on the valve stem.
Outside was too wide also, so I ground OD to fit in valve body. No more looking for a tool; it's in there.

 

I'd just buy a rebuild kit if I needed one.
https://www.miltonindustries.com/inflator-gage-overhaul-kit.html
I've had mine since 1995, and it still doesn't leak though.