Kral Puncher Breaker - The King is Dead.... After 2600 rounds

[Flatpicker]

Stephan,

The Kral PCPs do indeed have their shortcomings, but my knowledge base of PCP valves and hammers and hammer springs has been vastly increased by the ownership of my Puncher Breaker. I now jokingly call it my "Puncher Tinkerer" because I've been into the internals of the rifle so much.  That however, has been worth the price of admission to the Kral platform. The guys over at JSAR have a fantastic fix for the #%£}^{ valve /poppet design that Kral put on the market, and actually, the barrels are pretty darn good for their price point.  Even with all the tinkering, it's still my go to gun because of its power and accuracy. I would suggest a valve from JSAR or from Troy Hammer if you really want the gun to shine, although your route may turn out to be just as good.  If not, I can't say enough good things about JSAR; they are a great group of fellas who offer a good product with fantastic customer support.

[Flatpicker]

I wish I could find a .25 for $250, I'd buy it right now.

+1
Wouldn't hesitate.

[HYspd]

that's all I'll pay for something i have to tear down and replace half of mechanism right out of the box

[Hunt4dinner]

If I had to choose anyone to deal with right now on a kral it would be Troy. He’s dedicated to the platform and knows them very well. I’ve pondered sending my pb to him for a tune for more power and better shot count.

[KnifeMaker]

Travis sent me a couple of parts to compare to the actual ag the Krals are copied from, the south Korean made Evanix Air guns.  The real deal, the Evanix  is much superior in manufacturing fit and finish to the Krals. But that is well known already. LOL

Sadly, the knock off Krals are not to spec with  parts in the Evanix at all. As the parts can't fit the Evanix, even though at first glance it would appear they would. 

For those wondering about the quality of the JS parts from Travis and crew, Nice! Very-very Nice. Finely  machined, from real, honest to God high quality Stainless Steel.

Almost makes me wish I had a Kral, just to be able to install the parts of such fine workmanship! 

Knife

 

[thegerman]

Stephan,

The Kral PCPs do indeed have their shortcomings, but my knowledge base of PCP valves and hammers and hammer springs has been vastly increased my the ownership of my Puncher Breaker. I now jokingly call it my "Puncher Tinkerer" because I've been into the internals of the rifle so much.  That however, has been worth the price of admission to the Kral platform. The guys over at JSAR have a fantastic fix for the #%£}^{ valve /poppet design that Kral put on the market, and actually, the barrels are pretty darn good for their price point.  Even with all the tinkering, it's still my go to gun because of its power and accuracy. I would suggest a valve from JSAR or from Troy Hammer if you really want the gun to shine, although your route may turn out to be just as good.  If not, I can't say enough good things about JSAR; they are a great group of fellas who offer a good product with fantastic customer support.

Thank you for your tips!
I wrote an email at troy hammers website if he could send me a valve stem, but don`t get an answer. May be he is not shipping parts to germany.
I found a valve stem on ebay from an australien airgunner and bought it. This stem is made of steel an I will see how it works.
Now I know my kral very well, as you say, I was also often "in there" 

[Jason Phipps]

With the new parts installed and all upgrades done . Has anyone tuned these or turned up the power ? Troy or Travis ?

What fpe can be had with the .22 and the .25 ?

Seems like if they could be reliable after the upgrades then your left with some models that have some decent looks and vast air supplies. I'd be interested in the 850cc Big Max shooting in the 60fpe range ...

[kkarmical]

With the new parts installed and all upgrades done . Has anyone tuned these or turned up the power ? Troy or Travis ?

What fpe can be had with the .22 and the .25 ?

Seems like if they could be reliable after the upgrades then your left with some models that have some decent looks and vast air supplies. I'd be interested in the 850cc Big Max shooting in the 60fpe range ...

https://www.gatewaytoairguns.org/GTA/index.php?topic=132292.msg1312694#msg1312694

[Flatpicker]

With the new parts installed and all upgrades done . Has anyone tuned these or turned up the power ? Troy or Travis ?

What fpe can be had with the .22 and the .25 ?

Seems like if they could be reliable after the upgrades then your left with some models that have some decent looks and vast air supplies. I'd be interested in the 850cc Big Max shooting in the 60fpe range ...

https://www.gatewaytoairguns.org/GTA/index.php?topic=132292.msg1312694#msg1312694

With the valve from JSAR in my 22 PB, power went from 29 ft/lbs to 43 ft/lbs. Required some tinkering to calm the rifle down after install but that is addressed in the thread above.

[thegerman]

I called Jacob from JSAF for the valve on their website.
The valve does not fit in the Kral Puncher Jumbo, cause
it has a HPA Tank mounted instead a normal pressure
tube.
If there are more requests for a valve especially for the Jumbo, they will develop this and sell IT in the webshop, so Jacob said.

So guys, say you need such a valve 

[Alireza]

Hi

I know this is an old topic but I don't think the question is worth a new topic, so here we go!

It's time for my valve stem to be changed too... But I'm really struggling to unscrew the valve stem from it's body and I'm afraid to heat it because of the Teflon(?) washer on the valve stem body.
I tried locking pliers with an aluminum sheet as a protective layer for the finish of the valve but no luck! Does heating the body damage the washer?

I'd appreciate any suggestions on how to unscrew it without damaging anything.

[WyoMan]

Hi Alireza,

I had the same issue when I was experimenting with different seals in the Cothran valves...



I used two hand drills as wrenches with the 3-jaw chucks gripping both ends. A little crude but it worked well.
You may or may not need to polish out chuck marks but that wasn't a big problem... hth-

Wyo

[Alireza]

Hi Gary,

Thank you!

You know the real problem with Kral’s valve stem is that it’s smaller so you need almost twice the force to produce the required torque to unscrew it, and it just slips! And I really don’t want to leave “grip” marks...

[Kingston73]

I will be a puncher breaker owner in a week and just read this thread.  It’s a used rifle and I’m wondering if there’s any way to tell by looking if the stem is defective or if it’s just a wait and see if it breaks.   Are there still aftermarket parts available?

[kkarmical]

I will be a puncher breaker owner in a week and just read this thread.  It’s a used rifle and I’m wondering if there’s any way to tell by looking if the stem is defective or if it’s just a wait and see if it breaks.   Are there still aftermarket parts available?

https://www.pyramydair.com/product/kral-arms-firing-valve-part-at-28?a=8270

Whoever you're buying the gun from, if they have had no problems with it, just shoot it, if it goes out on you, $8 gets you back in the game.