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FT-12 leaks

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zgroskreutz View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zgroskreutz Quote  Post ReplyReply Direct Link To This Post Topic: FT-12 leaks
    Posted: 14 December 2016 at 6:15pm
so, I have an FT-12 that leaks from the front and was wondering if there is a way to fix this without ruining the power tube. I have checked to make sure it isn't anything else like a bad seal somewhere else but all the seals were fine. I even put new O-rings on to make sure of it. And they are oiled up too.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote spydercam Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2016 at 7:41am
Is it still leaking if the hammer is cocked ? Sometimes if the Valve spring is softer than in other valves so the not cocked hammer pushes a little bit on the valvepin, so it leaks.

May if you put some Drops(much, 10 or more) of good marker oil into the ASA and screw on the tank and fire ca. 50rounds so your valve inside(seal) will get oiled well. Wont help if there is something inside dirt etc. which lets the seal wonīt work !!!

Did you dissasembled the valve(which is inside the powertube) ?
You need to unscrew the gasline connector for to get the valve inside the powertube, out of it.

If it leaks from the front the valve doesnīt seal, the powertube just channels the pressure to both sides(hammer and bolt).

If you are a lucky one, one of the first ideas would help so you donīt Need to have to dissasemble the valve.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote tallen702 Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2016 at 9:49am
As spydercam said, the number one culprit of a leak down the barrel is from the hammer/striker not being cocked to the rear before connecting the air supply. If it's still occurring with the hammer cocked to the rear, then you have an issue with the seal inside the valve itself. It's not a hard fix if that's the issue, it's just a matter of a spring-clip retainer and pulling the valve apart to replace the cup seal (parts 51, 53, & 56 on the diagram in the above post). Like the above poster also noted, you can try a quick-and-dirty fix of putting some oil in the air supply adapter, removing the barrel (so you don't get oil all down it) and and firing off a bunch of shots in rapid succession to work oil into the valve seals.

Let us know if you're still having trouble with it after those quick fixes and we'll try to help from there.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zgroskreutz Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2016 at 10:30am
I got a few markers working now thanks to both of these posts but I still have 2 that still leak. I cleaned everything good and replaced the o-rings as well, but they still leak. Any other tips?

Edited by zgroskreutz - 15 December 2016 at 10:32am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote spydercam Quote  Post ReplyReply Direct Link To This Post Posted: 15 December 2016 at 11:04pm
If you could take some pics of part 56 and 53, both from the side of where it seals. Would help us !!!

If it looks good and there are no scratches etc. may you could install a extra washer which fits behind the valve spring to get more seal power.

We will get this done !!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tallen702 Quote  Post ReplyReply Direct Link To This Post Posted: 16 December 2016 at 9:06pm
If it's air gushing down the barrel, then yeah, I'm thinking parts 56 and 53 both need to just be replaced unless something is stuck between them that could be knocked loose. That's the cup seal and the valve seat seal. That's what holds the air in the valve. Easy to replace in all honesty. The FT-12 runs a simplified CVX valve. To dismantle it, you remove the valve from the power tube, remove spring clip (number 57 in the schematic) and everything pops right out in order. Check the seals, replace if needed, put it back in the way it came out, put the spring clip back in, enjoy!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zgroskreutz Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2017 at 4:48pm
how do i post a pic here? ive been trying but havent been successful. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote spydercam Quote  Post ReplyReply Direct Link To This Post Posted: 28 January 2017 at 6:35am
You Need to klick the insert Image button(the tree) and insert the URL of the pic. Should end with .jpg for example
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Post Options Post Options   Thanks (0) Thanks(0)   Quote zgroskreutz Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2017 at 11:33am
i tried that and it only allows me to pick pictures with the path of /uploads/public.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote spydercam Quote  Post ReplyReply Direct Link To This Post Posted: 31 January 2017 at 11:59am
I think you canīt attach pics here !?!?!?

Upload on your Homepage or to etc.(which getīs you an URL), you can also send it to me for example than i can go upload them if ...

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