FX Crown broke down

[PennyPincher]

I have had my Crown for a couple months now and shot about 1000 rounds through it. Loving it as far as feel, accuracy and power goes.
Today I filled it with tank pressure at 210 and Reg. at 135. after removing a stuck pellet by removing the barrel. I have a bad mag and by mistake tried to use it so stuck a pellet. The barrel is clear now! After the 5th or 6th shot I noticed the sound off and then pellet slowing down. I checked gauges and they were fine. Shot two more shots in which power continued to fall off to next to nothing. Reg shows the original 135 and tank presure is just below 200 as you would expect after 10 shots. SO i have no clue what has caused this power loss? Just to repeat... the gun fired the 10 progressively slowing down pellets and the barrel is clear.
Any insight is greatly appreciated.

 

[Scotty1]

I’ve had a pellet make it into the transfer port on my Crown, and had similar symptoms. Pull the barrel again and look at the transfer port for obstruction.

 

[RabbitofCaerbannog]

ed it with tank pressure at 210 and Reg. at 135. after removing a stuck pellet by removing the barrel. I have a bad mag and by mistake tried to use it so stuck a pellet. The barrel is clear now! After the 5th or 6th shot I noticed the sound off and then pellet slowing down. I checked gauges and they were fine. Shot two more shots in which power continued to fall off to next to nothing. Reg shows the original 13

Sounds like your liner is coming loose, can happen with the superlight barrel, pull the shroud off and see if the liner hasn't worked out a little.

 

[SilentSquirrel]

It sounds, literally, as if you need a new barrel o-ring, @PennyPincher
The one inside the brass barrel inlet.
It is part # 6 inn the attached drawing
(Please ignore my colored lines)

Hope this helps

just my Oh!ringing
Edward

View attachment F10265-tube-kit-superlight-cpl-ENG.pdf

 

[Arkansas_Airgunner]

I’ve had a pellet make it into the transfer port on my Crown, and had similar symptoms. Pull the barrel again and look at the transfer port for obstruction.

Same here. Only I had 1 full pellet and a sheared half of 1....

 

[PennyPincher]

YEP, Scotty1 appears to be correct in that there is a pellet in the port. It seems to be the fact as now the barrel will not come out. Before I do it I have to ask.... is there any choice I have other than just pull it hard enough that it breaks something loose. AND, if so am i possibly going to ruin something serious?

 

[Gerry52]

Have you tried loosening barrel, turn gun upside down & gently twisting barrel left & right to get pellet part(s) to drop out of transfer port? Index your barrel too for good TP alignment.

 

[Headshots]

I've had the same thing happen to my Maverick from using lighter pellets with the dual ports. Glad Scotty was able to help you out . He beat me to the reply.

 

[PennyPincher]

The jamed pellet in the port is not coming out so far. I am wondering if I could shoot it out. If I turned my gun way up and dry fired it would that mean the air is coming in from under the pellet and maybe shove it upwards out of the port? If not I guess I am just going to have to pull on the barrel until it comes free. I sure hate to think of what that could damage though. I am going to call Utah Air Guns tomorrw to see what they suggest. Any other suggestions will be much appreciated.

 

[RabbitofCaerbannog]

The jamed pellet in the port is not coming out so far. I am wondering if I could shoot it out. If I turned my gun way up and dry fired it would that mean the air is coming in from under the pellet and maybe shove it upwards out of the port? If not I guess I am just going to have to pull on the barrel until it comes free. I sure hate to think of what that could damage though. I am going to call Utah Air Guns tomorrw to see what they suggest. Any other suggestions will be much appreciated.

Just unscrew the grubs that hold the barrel in. You can simply poke it out with an Allen wrench once you've removed the barrel. If it's in the transfer port. Just get the fragment loose. And if it's in the barrel now use a dowel or coated rod to get it out

 

[PennyPincher]

The point is that I can't get the barrel out. It is stuck from the distorted pellet in the port. I fear damaging something pulling the barrel with all the pressure it would take to pull it.

 

[RabbitofCaerbannog]

The point is that I can't get the barrel out. It is stuck from the distorted pellet in the port. I fear damaging something pulling the barrel with all the pressure it would take to pull it.

Oofff. Might have to pull the valve and valve seat, hammer and spring. Do this from below. Although lead is softer than brass and aluminum. Maybe shearing by pulling will work

 

[Scotty1]

I’d imagine the lead pellet will sheer before any damage is done to the brass port. Does the barrel spin at all? You may damage the rear transfer port o-ring if anything.

 

[PennyPincher]

Okay, the fix according to Utah Airguns is as follows: 1. remove the tank 2. Degas the gun turning reg screw counter clockwise 3. Above the breach in the pic rail is a screw, remove it. 4. Stick a small allen wrench down the hole to contact the stuck pellet. 5 push the pellet downward into the air port far enough for the barrel to freely be removed. 6. Turn the gun upside down which should result in the pellet just falling out.

 

[SilentSquirrel]

Okay, the fix according to Utah Airguns is as follows: 1. remove the tank 2. Degas the gun turning reg screw counter clockwise 3. Above the breach in the pic rail is a screw, remove it. 4. Stick a small allen wrench down the hole to contact the stuck pellet. 5 push the pellet downward into the air port far enough for the barrel to freely be removed. 6. Turn the gun upside down which should result in the pellet just falling out.

Sounds like a good approach
Please let us all know how it turns out