Tuning Diana Bandit Fill Question

[brous]

I just received my Diana Bandit and hand pump. I read everything and it shows to put the fill part inside the hole just behind the fill gauge. I insert it and start to pump and as soon as there is a bit of pressure, I cannot pump anymore and the port pops out the fill hole. I'm not explaining this very well, but it seems like the air isn't going into the pistol. Thanks

 

[nervoustrig]

Usually when a fill probe wants to eject, it’s because one of the O-rings is sealing and the other one is not. Wipe them clean and check them with a loupe for any debris or a bite taken out of the perimeter. Check the inside of the port in the gun as well for any debris or scratches or gouges that could be interfering with the ability of the O-rings to seal.

If all looks okay, lubricate the O-rings with silicone grease or silicone oil and try again.

If it continues to eject, I’d be inclined to try new O-rings in case the originals have an imperceptible flaw.

Another thing to check is that the probe isn’t seating too deeply (or too shallow) such that the outboard O-ring (or inboard one) isn’t staying completely captured inside the port as you begin pumping.

 

[Long_Gun_Dallas]

That's an odd problem to have. Try removing the end cap on the tube. There is a small screw under the back side of the cap. Back it off slightly. It holds an oring that let's air in and keeps air from escaping 

 

[brous]

The o-rings look ok. One thing I did notice on my bandit compared to a few of the videos I watched in that the hole the fill probe goes in doesn't line up with the other side. Do you think that this could be preventing the probe from seating correctly?

 

[brous]

Thanks for the help. I figured out what it was. The cap that turns on the end to let the fill probe in only lines up a certain way. After reading the previous posts I turned it until it lined up which allowed the probe to seat correctly which fixed the problem. Thanks for the help, brand new to these guns!

 

[nervoustrig]

Very good, glad to hear you got it sorted out. It stinks holding a brand new toy that doesn’t work.

 

[north40]

Had a similar problem. Had to replace o-rings on fill probe and it worked? I have no idea why that would make any difference but it did. I love the bandit but I do fi d that it’s a bit finicky. I did put a regulator in and it helped. It’s a very accurate gun, especially for the price but you definitely get what you pay for. That said, it’s a great little gun. No complaints for the price at all! If I was comparing it to a $1000+ pistol it would be different but it’s a sub $200 gun and it is so much fun!!