Yamaha K-31 Service Manual download pdf (Page 35)

42, 43 and 44

VI. Weapon Maintenance

1. Overview

22 Each shooter is responsible for the maintenance of his rifle. The Group and Section Chiefs as well

as Unit Commanders of reserve units are responsible for periodic weapon inspection. The group

and section chiefs will perform an inspection and comment on all maintenance issues such as the

condition of the barrel, cleanliness and so forth.

A gunsmith should be present, if possible, to repair at site all small malfunctions, and to retain all

weapons that need repaired or returned to the arsenal.

23 Select locations for weapons storage that are dry and not subject to wide temperature variations.

The weapon should be unloaded, bolt closed, trigger spring released, if it will not be used for a

long period if time. The weapon should be well greased beforehand especially the barrel bore.

24 When a weapon is being shipped either by train or post, the front and rear sights should be well

padded. The bolt should be wrapped in thick paper or well wrapped in packaging material.

25 In order to properly handle the weapon, the following is forbidden:

- Carrying more than one rifle on the same shoulder.

- Loading unpackaged weapons into vehicles.

- To obstruct the barrel muzzle with grease or a cleaning patch.

- To modify the weapon in any way.

- To use rifles as a stretcher.

2. Cleaning

26 The degree of rifle cleaning will depend on how dirty the weapon is. When the weather is dry it

is sufficient to dry then grease the exterior of the weapon and the bolt. After shooting with ball or

blank ammunition or with propulsive cartridges, a more thorough cleaning is required, also if the

weapon is soiled or wet.

If it is not possible to clean the weapon immediately after firing, the bore of the barrel should at

least be greased while it is still warm.

Only material provided in the accessory pouch and the weapon grease delivered to the troop

should be used for cleaning. Cleaning rods should be used only to grease and degrease the

barrels, they should not be used for cleaning.

Cleaning materials should be kept in good condition. The cleaning cord should be equipped with

a wire mesh that is not worn out. To wash the cleaning cord use hot water no hotter than 30° C;

the wire mesh should be removed beforehand. The wire mesh should only be placed on the cord

and the cord rolled only after the cord is dry.

27 Metal parts of the weapon should be rubbed with a dry cloth. It is necessary to remove old dried

on grease and gunpowder residue with a little fresh grease and clean the grooves and hard to reach

parts with small pieces of wood. One the cleaning is complete; lightly rub all of the metal parts

with a clean greased cloth. Ensure particularly that moving parts are well greased, especially the

locking sleeve and the cam follower plate/rod. The firing pin and the firing pin channel should

not be greased.

Rub rusted spots with a dry cloth, then grease sufficiently, then rub again. Repeat in this fashion

until all of the rust is gone and only the dark spots are visible.

28 The wooden parts of the rifle, the stock and hand guard, should be cleaned with a clean cotton

cloth and then lightly greased.

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Yamaha K-31 Service Manual Page 35

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