Tuning 30 Bobcat issue MK 1

[smithfan4152]

Hello, 

I recently sold a MK1 30 Cal Bobcat and seemed all was fine with the buyer. He had aired it up to the proper bar, and shot it. Problem came after the 3rd or 4th re fill, when the air was put in, it all came out again, and now will not hold air. I had this serviced by FX for a trigger issue, and I know they go over the gun before returning it. Just wondering if any have had this experience, or have an idea what would cause this, Thanks. Jim

 

[Enkey]

Hi

If you could specify the area where the air is leaking, it would be of great help, the o-ring that gives more problems in this platform is the valve seat

Regards

Enkey 

 

[smithfan4152]

Hello,

I don't have the gun, I'm being told that when he went to refill, he had the bottle hooked up to the gun, filled to the correct pressure, closed the valve on the bottle, and when he bled the line the air leaked out of the gun, so that's as much as I can say. The gun functioned properly and then started leaking. 

 

[Centercut]

Probably the valve pin/valve seat area. The actual brass retainer on the pin can slide forward and then the actual valve disc no longer seals against the seat. It could also be the seat or the seat o-ring. The Mk1 Bobcat is not an easy gun to work on, since the Mk1 has the copper tubing running from the pressure tube inlet to the fill foster and fill gauge. Very easy to break if you're not super careful. The rest of it is pretty much like any Bobcat/Boss/Royale... The parts an be ordered from FX-USA.

 

[smithfan4152]

I sent my MK1 Bobcat 25 cal. back to FX A month ago, it had started leaking, I had nothing but trouble trying to remove the action from the stock, so I just sent it to them. Seems the MK2' bobcats come apart easier, or I just didn't know the trick. Jim 

 

[Centercut]

Its easy. You have to first remove the air tube after you loosen the allen screw (a couple of turns) in the hole near the forward part of the stock. Then unscrew the air tube - the gun doesn't need to be degassed. Once that is done its just the one screw under near the grip and it'll come right off. Kind of a pain to have to remove the pressure tube before removing the stock.

PS., the Mk1 has a fill foster fitting, not a fill port with a fill probe.

 

[douger]

thats prety crazy i shot that 30 bobcat was great gun 

 

[capefeargunr]

When he bled the fill line did all the air bleed out of the gun through the fill line? Might be the fill port check valve sticking open or the o-ring in the fill port bad.

 

[zx10wall]

When he bled the fill line did all the air bleed out of the gun through the fill line? Might be the fill port check valve sticking open or the o-ring in the fill port bad.

+1 

 

[1shot1kill56]

First off they leak terribly , poor design.The valves like to leak and the fill valva seal go bad .But how do you know he did not over fill.Alot of people try putting in moer air.10 bar to much and it can leak.The copper tube also turn green rot and leak.It is just i terrible design.

 

[Glem.Chally]

First off they leak terribly , poor design.The valves like to leak and the fill valva seal go bad .But how do you know he did not over fill.Alot of people try putting in moer air.10 bar to much and it can leak.The copper tube also turn green rot and leak.It is just i terrible design.

Extreme airguns Jim?