The following is not new information, but I
have found little info with pictures as far as fieldstripping the Winchester/Miroku
1886. I thought it might be helpful to those who own these leveractions to
have such info....Click on images to enlarge.
ONE: Remove the upper and
lower tang screws and pull buttstock straight off the rear of the receiver.
The upper tang screw goes all the way through and screws in the bottom tang.
The lower tang screw is a wood screw.
With the action closed pull the hammer to rear and remove the receiver
(hammer) screw. You want to captivate the mainspring before removing the
receiver (hammer) screw. This coil mainspring is strong and may fly to the
next room if not held in place. You can use a paper clip or similar item to
hold the mainspring in place.
After removing the receiver (hammer) screw, open the lever and pull the lower
tang straight back out of the receiver. At this time the hammer will drop out
Pictured below is the hammer and lower tang assembly. The trigger assembly was
not taken apart
Remove the Spring Cover Screw from the right hand side of the receiver.
Unscrew the carrier stop screw and remove the carrier stop from underneath the
THREE: With the action part
way open, unscrew the locking bolt stop pin screw from the left locking bolt.
This will allow the locking bolt pin to be pushed out of the lever and locking
bolts from right to left. Now pull out both locking bolts from bottom of
If you have trouble pulling the right locking
bolt out of the bottom of the receiver, move the cartridge guide up or down,
whichever is necessary, to allow the locking bolt to be pulled out.
Lower the finger lever and slide the Breech Bolt out of the receiver far
enough to see the lever and Breech Bolt Pin. Use a punch to drift out the
Breech Bolt Pin out of the Breechbolt.
After removing the Breech Bolt Pin, pull lever
out of the bottom of the Breechbolt and slide the Breechbolt out of the
Be careful when pulling out the Breechbolt as the Ejector, Ejector Spring, and
Ejector Collar is now loose and can fall out the front of the Breechbolt. Once
the Breechbolt is out of the receiver remove the Ejector, Ejector spring, and
Ejector Collar out the front of the Breechbolt.
The firing pin is of the inertia type and can
be removed by using a punch to drift out the Extractor pin. Once the Extractor
pin and Extractor are removed the inertia firing pin can be pulled out of the
rear of the breechbolt.
FIVE: Slide the Lever,
Carrier Hook and Carrier out the back of the receiver. Notice how these parts
go together for reassembly. The Carrier Hook connects the Lever And Carrier by
the lower hole in the lever and (rides in the middle of the Carrier) a channel
cut out of the Carrier
I didnít take the rifle down any further, but
if need be you can remove the Cartridge Guide and Cartridge Stop from the
To remove the cartridge guide simply unscrew the cartridge guide screw from
the right side of the receiver and remove the Cartridge Guide from inside the
right hand side of the Receiver
To remove the Cartridge Stop, unscrew the
Cartridge Stop Screw from the left side of the receiver.
The Cartridge Stop is highlighted in the
Now to get all these parts back in the í86!
Reassemble in the reverse order.
To get the Lever, Carrier Hook, and Carrier to stay together for reassembly it
is much easier to use a rubber band to hold these parts together. If not, you
can become frustrated in short order.
ONE: Slide the Breechbolt
assembly partway into the receiver. Slide the Carrier, Carrier Hook, and Lever
into the rear of the receiver.
Lineup the Lever and Breechbolt and insert the
Breechbolt Pin into the Breech Bolt. You will need to make sure the firing
pin, and Ejector is both pushed in far enough into the bolt, and that the
lever is lined up at the same time so the Breechbolt Pin can be pushed into
the Breechbolt. Fun isnít it? This is just about the time you wished you
had a third hand, but in no time you will have these lined up and the
Breechbolt Pin inserted.
(Lever and Breechbolt pin hole
lined up and Breechbolt Pin inserted)
Slide the Breechbolt, Lever, and Carrier on in
the receiver. Once you get these parts into the receiver far enough discard
the rubber band. Now on to the Locking Bolts.
Insert the Locking Bolts in from the bottom of the receiver and install the
Locking Bolt Stop Pin and screw. Again if you have problems inserting the
right Locking Bolt, move the Cartridge Guide up or down whichever is necessary
to allow the right Locking Bolt to go up into the receiver. The right Locking
Bolt has a groove cut into it to move the Cartridge Guide up and down while
the action is cycled.
THREE: Install the Spring Cover Assembly.
STEP FOUR: Install the Carrier Stop and Carrier Stop Screw to the underside of the Upper Tang
Install the Hammer and Lower Tang Assembly back in the rear of the receiver.
Again this is somewhat of a juggling act and a third hand could come in handy
at this point. You need to keep the Lower Tang pressed in while making sure
the Trigger is pulled back while aligning the holes in the Hammer and Carrier.
Use a punch to help align the parts.
When you get the Receiver Screw pushed halfway
in take a punch and align the carrier so the Receiver Screw can be pushed on
in and screwed in the Receiver. If you removed the Mainspring during this
process it needs to be captivated. An easy way to captivate the Mainspring for
reassembly is to install the hammer in the Lower Tang outside the Receiver,
then insert the Receiver (Hammer) Screw into the Lower Tang, then allow the
Hammer to fall as far forward as possible and insert the Mainspring and Hammer
Strut in the Lower Tang. Pull the Hammer back compressing the Mainspring. Once
the Mainspring is captivated, pull the Receiver (Hammer) Screw out of the
Lower Tang. (Thanks for the tip Griff!)
SIX: : Install the Buttstock.
This is a larger resolution photo