FX Impact m3 leak from mystery spot ?

[Baddoglowder]

Got a leak from the add on 2nd reg gauge , I believe I got it from Huma but not sure the manufacturer . It is the little oval hole where the pencil points to . I’ve looked at schematics and still can’t find the source . I’ve already replaced the oval shaped O-ring behind the gauge plate between where it attaches to the rifle frame .
Anybody had this one go bad before - you might save me a lot of searching .

 

[Trucker3573]

Sorry no experience with the angled block. There must be an oring somewhere else in that block I would think ?? If not it in itself must be defective. I’m sure someone that has one of them will know more.

 

[Jay308]

This looks to be the Huma, it shows 3 o-rings plus the x-ring for the gauge.

FX ANGLED MANOMETER MOUNT WITH GAUGE - SA Air Rifles & Accessories

The FX Angled Manometer Mount with Gauge, made for the FX Impact M3, M4 and DRS lets you mount your gauge at an angle to view at a glance.

saairrifles.co.za

 

[jps2486]

This looks to be the Huma, it shows 3 o-rings plus the x-ring for the gauge.

FX ANGLED MANOMETER MOUNT WITH GAUGE - SA Air Rifles & Accessories

The FX Angled Manometer Mount with Gauge, made for the FX Impact M3, M4 and DRS lets you mount your gauge at an angle to view at a glance.

saairrifles.co.za

Remove the reg and replace the O ring down inside the block. While you’re at it, rebuild the reg with all new O rings.

 

[gbmarcht]

Got a leak from the add on 2nd reg gauge , I believe I got it from Huma but not sure the manufacturer . It is the little oval hole where the pencil points to . I’ve looked at schematics and still can’t find the source . I’ve already replaced the oval shaped O-ring behind the gauge plate between where it attaches to the rifle frame .
Anybody had this one go bad before - you might save me a lot of searching .

View attachment 575551

Yes, there is an o-ring that goes in the oblong opening, should have come with the kit

 

[Baddoglowder]

I took the offered advice, much anppreciated, and grabbed my o-rings , went to work . I am having trouble finding the hidden o-ring in the block . Right now all I have is stainless pics so I ordered a brass one and waiting but the holiday weekend will slow things up a bit . I did notice the regulator is different than videos I’ve watched . I have an early M3 in .35 . Mine does not have 2 washers on the small brass end that comes out of the aluminum housing . Mine has no o-rings and it also is a screw driver head Not an alien screw head . It sure makes it a pain in the rear to work on As it’s not the same . I also noticed the Fx schematic shows x2-1 and x2-5 o-rings . What gives with that ?
the gun shot and held air for 4 yrs .
also this regulator came from huma with 9 washers - the package when new said it was a huma extra high pressure . The huma sight shows 12 washers . I have 2 as I purchased a spare by accident and robbed 3 washers from it .
Thinking about calling Utah air next workday as I just got some parts from there and may need to buy some more to get this going ….the hidden o-ring has me stumped and confused especially after seeing differences in instructions ?
I’ve worked on it before , always with instructions in front of me or a video but this time it’s kicking my rear-end .

 

[Baddoglowder]

I searched and found the Huma-Air instructions pdf which helps a lot and answers several questions but still I am stumped on the hidden o-ring location even after watching a video demonstrating its location - gotta wait for the brass pic before I go into very much further . Wishing I had a endoscope camera now .

 

[Scotty1]

Here is a pic of my Crown mk2 reg bore, the o-ring location will be the same in your Impact. Take care to not scratch or mar the the o-ring groove when removing the old ring.

 

[DesertSilver]

I went through heck trying to get that Oring out of my impact. I finally bought some dental tools. This is the one that worked very well. I even used it to remove the Orings out of the power block and didn't damage them so I reused them. Rifle is holding air perfectly.

 

[Revoman]

You might try a search here on AGN, there are many threads with this information you need.
The reason you have a slotted adjustment screw is because it's a HUMA, they use a slot instead of a hex.

mike