Broken Fuel pressure test gauge


#1

Can anyone tell me if there is a difference between wet and dry pressure gauges.

I tripped at my shop and dropped my fuel pressure test gauge. I was looking on-line for replacements…just the gauge…but they don’t list them for liquids, or air pressure etc…

I’m under the impression that any gauge in the 0-100 range would be fine.

Yosemite


#2

As long as the gauge uses a bourdon tube and not a diaphragm to measure pressure, it can be used to measure the pressures of gases and liquids.

Tester


#3

If a gauge is properly connected and held above the source of pressure liquid shouldn’t enter the gauge. But what on your gauge is broken? The mechanical gauges are bourdon tube

https://www.google.com/search?q=bourdon+tube+gauge&client=firefox-b-1-ab&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwiA3YzyiJHeAhVKA6wKHaySBkIQsAR6BAgCEAE&biw=1212&bih=779

and should take a beating without damage.


#4

I dropped it and when I inspected it, the needle read just above the max pressure…I think it is 100#.

I thought that the needle just jumped over it’s stop post. I took the cover off and used my finger to rotate the needle clock wise enough and then slip it over it’s stop again.

When I hooked to my truck…which should read about 40# …it only rose to about ten # and it took at least a minute to rise that far. Nothing leaked!!!

Yosemite


#5

Check your gauge with air pressure.And FWIW any gauge or sending unit can be tested with controlled air pressure. If your gauge measures 0 to 100psi connect it to 50psi and if the gauge indicates 50psi it’s working OK.


#6

I will try using air pressure. Good idea @Rod_Knox !!!

Yosemite