Yamaha K-31 Service Manual download pdf (Page 28)

30 and 31

Mq. 11

To remove the hand guard; it is necessary to raise the rear sight leaf to a 90 degree angle, then carefully lift

the hand guard turning it at the same time to clear the sight leaf. Unscrew the action screw and the

magazine plate screw and remove the barrel and the receiver.

Mq. 11

Remove the barrel from the stock by

grasping it towards the rear.

Mq. 31

Remove the barrel from the stock by

grasping it from the muzzle

Only a gunsmith is authorized to disassemble the weapon further.

2. Re-assembly

6 Re-assembly is accomplish in reverse order of the disassembly. Be careful to not mix parts of

different rifles. Only parts with the same serial number should be assembled together.

7 Re-assembly operations

a) Mounting

Mq. 11 Mq. 31

Place the barrel in the stock front end first

so the mounting sleeve fits tightly into the

milled slot in the stock.

Replace the Magazine Plate

Loosely tighten the Magazine plate Screws

and the Action Screw.

Tighten the center magazine screw

securely, then the remaining two screws

Lift the rear sight leaf to a 90-degree angle

and replace the hand guard. Lower the

sight leaf

Slide the rear barrel band with the sling

loop and tighten it without bottoming out

the screw

Inspect the Sling loop spring to ensure

there is free movement and that the barrel

band is tight

Replace the front Barrel Band by placing

the lower part against the stock then swing

the upper part into position and tighten the

screw.

Place the barrel in the stock receiver first.

Replace the magazine plate

Loosely tighten the two magazine plate screws

Final tighten the forward screw first and then the

aft screw

Replace the hand guard by ensuring that the metal

tab engages the slot in the rear sight housing.

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Yamaha K-31 Service Manual Page 28

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