b26 need help

[shady816]

i finished my spring compressor today so i could get my cfx back together easily and decided to take a look under the hood of my new b26 and i was suprised to see how completly different it is from the gamo so i will need to know exactly how to get this apart. i did manage to knock out the two pins holding the trigger group and saftey in and removed it but could not see how or what was holding the spring in i was afraid to put any pressure on the flat back of the tube before knowing how it is suposed to come out. thanks in advance for any help or exploded view of this gun would be nice i could not find it on the web.

[rbshoots]

Xisico USA has a parts diagram of the B-26....not a very god one mind you, but it does show all the parts in an exploded view format..... haven't ripped into my 26 yet....... my brother can help, he visits here frequently.......

[arnie3981]

This would help:

http://olympia.fortunecity.com/kickbox/377/xs-b20/xs_b20_index.html

[shady816]

Thanks for the info it will be very helpful just one more question how much pre load is on the spring my spring compressor was made for my gas ram guns and only has 3-4" of travel at the rear of the tube so will this be enough to relieve the tension enough to remove the end cap without alot of spring pressure.

[speedturtle]

When you took out the two pin rods that is holding the trigger assembly there is still two big round metal covers on the trigger block within the compression tube. It is not a rod but a button cover with pin locks inside. get a small allen key (same key that is supplied to adjust the trigger unit on the B26) and cut off about 1/8" from the shorter end and use this as a push pin to take it off from the inside of the trigger block. Once you have taken out one of them just insert a nail (1/8" in diameter) on the opening of the first button hole and knock down the other one. Now you can rotate the trigger block by using any flat metal material (like the handle of the adjustable wrench you used to take out the bolt that holds the trigger block to the compression tube and rotate it towards you. Rotate it just enough to let you see that the locking notch on the rear end of the trigger block is freed. Keep it on this orientation and just slowly release the tension on your spring compressor and you're good. Do not force your spring compressor to push the trigger block without taking out those two button pins that I am telling you about or you will either cause some damage on the rear cover of the trigger block or worse you can even cause your spring compressor to buckle. Be safe always. HTH

[shady816]

so it sounds like you have taken one apart before can you answer my follow up responce to arnie i think was his tag.

[speedturtle]

Yes, numerous times. Any spring compressor that has about 3.5" of travel from end to end can handle the B26. Less than 3" of travel and you're asking for some trouble. You will definitely nick some of compression tube if the travel is shorter than 3.5". The best would be about 4". The spring preload of the B26 is roughly 3.25", not a lot but enough to cause some physical harm. You might be surprised, once you get the hang of it you can actually disassemble your B26 is less than 10 minutes flat with the right tools. Without a good spring compressor IMO it would be very hard to put it back on right. HTH.

[shady816]

thanks willie   very helpful my resons for disassembly is i will be ordering vortek kit when available.

[speedturtle]

Mine has less than 3" of spring preload now since I am using the Crosman Quest piston spring as a spring replacement. If you are a tweaker I'd suggest that you don't put any additional steel washers on the front side of the spring as this will make your B26 very hold sensitive. Stick with just a delrin top hat to control the spring twist during decompression and you're OK. You can add steel washers to add some more spring preload at the rear end of the spring and you can gain some FPS doing this mod. If you are up for it you can definitely make your B26 a smooth shooter if you will button your piston unit as some B26 has a lot of tolerance from the I.D. of the compression tube to the O.D. of the piston unit. The B26 is one of the best springer I have handled so far and it has one of the nicest trigger unit I have ever seen for its price. Mine has a distinct 2 stage feel into it and breaks at less than a pound coustesy of RCnMo of which I believe is also a member of our GTA family here.

[shady816]

what might your fps be mine seems a little on the week side but it may just be the unmanly spring twang that comes from mine but all in all shots very well and i do like the trigger also very nice

[speedturtle]

Good luck then. I have seen the ads about the Vortek kit to be available soon for the B26 but I like to experiment and understand things so the Vortek kit will come later (if I still want it. LOL!). There's a lot of fun in experimenting on your own airgun and by leaps and bounds you will learn a lot by working with them and changing the parts one at a time. Just don't forget to document everything that you are doing and make sure you only start working on the internals of your airgun if you have a chrony. Without one I'd say it's like a blind man crossing the streets on his own. You'll never understand if what you did helped your airgun shoot better if there are no data to validate it. Sometimes a smooth shooting airgun does not necessarily mean it is also an accurate one. It might be twangy but if it really has a very good barrel just stick with the twanginess for now and you're still fine. IMO the barrel either makes or breaks the airgun itself. You either got a lemon or really a contender. Good luck and may the force be with you. Hehehe.

[shady816]

thanks again willie i am a tinker and do plan on squezing all i can get out of this rifle for i like this one the most of all my arsonal and no croney and i know i need one maybe next order.

[speedturtle]

Out of the box I got a cool 880 FPS shooting RWS superdomes 8.3 grains pellets. After my tune is shoots at around 892FPS. When i tried using the Crosman Quest spring mine shoots at 907FPS and still shooting just fine (1/4" outside diameter group size at 10 yards). I don't have a JM small apex seal yet but that is the next mod that I plan to do. The stock piston seal is a bit hard IMO. A softer piston seal will probably work better with the B26 compression tube. Ahhh... too much mod to do. Hahaha! I just love it. I'm learning a lot in the process. but that is just for my own expense, no plans to be a tuner myself for others as my tools are basically the cheap and regular ones.

[shady816]

for not being a tuner it sounds like your doing great and good to know of someone that is moding the b26 for i have big plans for this rifle and i think after this learning expierence i will go with jm seal and after market spring instead of vortek from what i have heard vortek usually results in loss of fps on most installs.

[speedturtle]

I heard that, too. But each airgun is different. Too many variables to consider. I believe the Vortek kit's main objective is to really control the spring vibration during the firing cycle. That is why they offer their own piston spring together with the vibration dampers as this idea won't work well if the spring and the guides don't fit perfectly. Just my guess, I think their spring is a little bit smaller in the O.D. to accommodate that rear end black delrin guide. If they really want to take this step a step higher the best way to do it is to offer their own piston unit together with the vortek kit just like the laza glide kit for the early Beeman R1's! Now, that's awesome! But using this concept for the lowly and humble B26 is an overkill. Imagine a tuning kit that costs 3 times more than the airgun itself. Hihihi! For me, I'm tweaking my own airguns because I can't afford a full tune myself. If I have the extra money I'd probably buy another B26 and tune it again. Hahaha! I know, I'm cheap! LOL!