Scuba gauges leaking?

Can any one give advice on this for me?
I had my scuba tanks and first and second stage regs serviced ready for summer and there are bubbles coming from the high-pressure hose where it enters the gauges assembly? This shouldn’t be happening should it, the dive shop said I will need a new reg set, is this right?
Could it be something simple or are they right?

Hello scuba Bob

It is a sign they are going to fail, i would replace them as it is not worth the risk. Most fittings are pressed so when they begin to leak - which they all do with time, they typically can't be serviced in a cost effective way. Check out your local dive shop and shout yourself a new set.

Don't risk it!

Enjoy
 

Those are good directions from igno, give it some thought!

This was good timing, when getting a pic or two of what I do I just found our mate had dropped another of my tank O rings when finishing filling the tanks and all needed my stuff needed servicing.
That is annoying when finding this out in the boat, then having to change over O rings from tank to tank, espcialy if it’s a rough day,lol.
I will have to get some more, usually have spares but gave my last one by the looks of things to Chris.

Mate this is what I do, what you do, is up to you!
I was trained in all reg servicing, not BCD servicing that’s another thing, I had to teach myself that, there was no such thing when I was trained,lol.

I put the first stage to a tank and force the high pressure gauge out of the boot sliding the boot up the hose, turn on air on and sit the gauge in a bucket of water.
I would look at where the high pressure hose enters that gauge and if the bubbles are coming from near the gauge and not from the actual hose, then it is just two O rings or one O ring needs changing.
Obviously I turn off my air and purge the second stage till all air is gone after this.

There is usually a nut shape of two sizes, I turn one opposite the other till the gauge separates from the hose, this will expose what looks like a very small section of brass pipe protruding from the gauge, use your fingers or material covered long nose pliers to pull this out if it is that type.
If the O ring remains behind then use a needle to get it out.

I clean everything, soft clean material in pipes over a tooth pic or what ever, vinegar for corrosion/rust removal and never put material over metal to clean metal!
Then I will see on the protruding end or on each end there is an O ring, I lift them or it out with something very thin, I use something fine like a needle or what ever, also I remove the O ring from the end of the hose as well in there is one and get the same O rings from either bunnings or a bearing shop, etc.
I use to get mine from a true value hardware store.
I get some silicon grease or cheap silicon spray from super cheap,” I do not use Vaseline where there is extreme pressure as it can possible explode”.
I apply silicon grease every where there are O rings or metals, put the new O rings back where the worn ones came from, wipe off silicon, refit it into the gauge and then into the hose, do up the nut shapes firmly and its all good.
When ever I turn on a tanks air for checking something or just when I am getting ready for a dive, always put my hand or a towel over the repaired item area or over the tanks valve to the first stage, just in case!

These are the types I use; one old type as a spare and the other is my current one.
Its good this came up, as I need to service my gear, I have been lazy!

My day to day one.




My old spare one.

Awesome advice guys, thank you so much. 
It worked.