Author Topic: Basic Disassembly of Disco Air Rifle  (Read 1753 times)

Offline jerry rosewicz

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Basic Disassembly of Disco Air Rifle
« on: April 08, 2009, 11:55:13 AM »
As promised, this is a basic guide to help those take down their Disco (Sorry , no Pictures):

1.  You will need a set of small Allen wrenches, Phillips head screwdriver, Flat heasd screwdriver.

2.  Remove the front sight and its base. (This is a test.  If you can not do this, STOP.  You don't have the skill to take your Disco apart)

3.  Loosen the top and bottom Allen screws enough to slide the barrel band off the barrel and gas cylinder.  Make sure they are out enough so that the screws won't scratch the barrel.  This should also prevent you from losing these tiny screws.

4. Take a small, flat Jeweler's screwdriver and find the arm of the spring near the top of the trigger.  Try to get behind it and pry it forward enoughthat it no longer holds the button safety captive.  Now push the safety button from the small side, out of the trigger guard.

5.  Now use a large Phiillips head screwdriver to remove the single stock screw.  Remove the barrelled action from the stock.

6  Remove the flat slotted screw at the top rear of the bolt body. Remove the bolt end cap with your finger nails.

7.  Remove the screw under the air cylinder's end cap (may want to use an angled or wratchet type screwdriver to get at this screw) Now ease the end cap with the hammer spring out of the cylinder.

8.  The bolt handle wiill unscrew from the bolt body with the help of an adjustable wrench applied to the flat on the ball of the bolt handle.

9.  Now you can coax the bolt to the rear more than it normally travels and expose the tiny Allen head screw in the chamber area..Not sure the size wrench, but it is the smallest I've ever seen.  This tiny screw is all that is holding the barrel and breach bolt assembly to the air cylinder, so be careful and gentle as you are removing this screw.

10.  Now the barrel and breach should be seperate from the cylinderand trigger assembly.  Look for the silvery tube that connects the air chamber to the barrel and make sure it is still there.  It almost resembles a very smal machined washer than an actual tube.

11.  The tiny allen screw on the top of the bolt body can now be loosened and the barrel should pull out of the bolt body.

12.  All of the above can be done with a full charge of air in the cylinder.  

    I took my Disco apart to polish and clean up the rear of the barrel and air feed hole which was causing pellets not to feed smoothly.  Now I drop in a pellet and the bolt slides in with no hang up.  Whatever I did made a huge difference in feeding smoothness, so it was worth the effort.

   I have no plans on touching the air cylinder unless it eventually leaks and needs re-sealing.  My trigger is fine as it came..two stage and breaks at about 3 pounds.  Power is fine for basement shootin at 30 feet, but I did look at the hammer spring and wondered what a heavier one might do to increase power (smile).

  My advice to most shooters is, if your Disco does not have a problem, don't try to take it apart...just shoot it and enjoy it as is..