Make sure the gun is unloaded! Open the the lever fully....pull out the small lever on the bottom of the magazine tube, it's about 3 inches long on the end of the tube. Rotate it counterclockwise to unscrew this tube completely, you can remove it completely out of the guides and off the gun or just enough to clear the frame. Now, with the frame firmly grasped in your hand, DO NOT USE ANY CLAMP OR VISE, rotate the barrel counter clockwise, (as looking down the bbl.), only 90 degrees then separate the bbl. from the frame. If it hasn't been apart for a long time this may require some effort but in no case should you clamp the gun in any vise or use any type of tool. Sometimes another person to help hold the frame while you rotate the bbl. is necessary. If it still won't come apart then get the help of a gunsmith with the proper tools.
Good luck....Marty
This Winchester Model 1886 was made in 1909.
1891 is the answer to your question as to the date of your model 1886 Winchester
your winchester model 1886 rifle was made by winchester in 1898.
With the serial number that you provided,your Winchester model 1886 rifle was made in the year 1889.
Your Winchester model 1886 chambered in 40-82Win.was made in the year 1892.
With the serial number that you provided,your Winchester model 1886 rifle was made in the year 1892.
With the serial number that you have provided;your Winchester model 1886 rifle was made in the year 1894.
Your serial number indicates that your Winchester model 1886 lever action rifle was made in the year 1891.
model 1886
With the serial number that you have provided,your Winchester model 1886 rifle was made in the year 1889.
No sn provided
Without a serial number I cannot give you a year of manufacture.I can say that the Winchester model 1886 was made during the years 1886-1935.