Brocock Contour leaking filling fitting.

[MrChipShoulder]

Hi Guys,

Before I 'go in', and start unscrewing things, can anybody guide me?

I filled my daughters Brocock Contour today and when screwing the cap back on, I noticed the cap was vibrating on the threads. I put my tongue on the filling hole and air is leaking out.

So I assume I can simply fire the gun until the cylinder is empty, unscrew the filler and service/replace as needed?

Can they be serviced or replaced and can I buy the parts from Best Fittings?

Thanks.

[MrChipShoulder]

Seems the valve can be bought,
https://www.bestfittings.co.uk/shop/...re-fill-valve/
So just need to check it's removal.

[MrChipShoulder]

OK,

No reply here for info, so I just shot out all the air until empty anyway and unscrewed the value.

I'll get a new one from BF, fit and fill back up. I hope I've not damaged it by draining all the air out

[gingernut]

Should be fine.
Not emptying first = damage to you.

[Rickenbacker]

Yes, you'd certainly shoot it empty of air before attempting to unscrew the Foster valve. And then go very carefully as you unscrew it, to satisfy yourself that there's no remaining pressure behind it.

From memory - Yes Brocock use a similar valve to the BF item as linked above.

The BF valve is strippable / serviceable, as I would imagine the Brocock valve is - so I doubt you need to order a new valve.

If the slow leak is from the center of the valve - that's commonly caused by a tiny bit of grit ingress, or a dry / perished seal in the valve.

If you're removing the valve, you might want to try blowing it through with a drop of Pellgunoil or silicon oil.

You'll see what I mean if you Google "foster valve service" images.

[Rickenbacker]

Here's the picture I was looking for:

https://www.bestfittings.co.uk/shop/...e-valves-only/

A slow leak out from the middle of the valve is often a tiny bit of dirt / grit between the small o-ring and where it seats in the valve body... that or an old / dry o-ring.

[MrChipShoulder]

The valve came out with no problems.
it was leaking from the sprung valve in the middle.
The original does not look like the ones BF sell.
The Brocock valve has a deepish shoulder on it going down into the cylinder.
I expect the O-ring has worn out as it seems to have developed a shoulder (unless it's moulded like that?)

I'm waiting on a reply from Brocock to buy a new valve.

Thanks.