PK Series Manual (English, 2005) - Forgotten Weapons

Lubrication
Lubricate the weapon with lubricating oil and keep it covered as much as possible.
Hot & Humid Weather: Inspect the weapon more frequently for signs of rust. Keep
the weapon free of moisture and lightly oiled with lubricating oil. Clean and oil more
frequently if the weapon is exposed to salt air, high humidity, or water.
Hot & Dry Weather: Clean the weapon frequently to keep sand and dust from
collecting on the working parts; use of weapon oil should be kept to the absolute
minimum. Graphite is best in hot and dry climates.
Cold Weather: During cold weather periods with a temperature of 5 degrees Celsius
and below, lubricate the machinegun only with liquid weapon oil. When changing from
one lubricant to another, it is necessary to carefully remove the old lubricant from all
parts of the weapon.
Before removing the old lubricant, it is necessary to conduct full disassembly of the
machinegun, wash all metal parts in liquid weapon oil and then rub them clean with a
rag. Note: Never use weapons grease instead of liquid weapon oil with air
temperatures below 5 degrees Celsius.
A machinegun carried from a freezing to a warm location is to be cleaned after 1-20
minutes (after it becomes moist). It is recommended that the machinegun be rubbed off
with a rag wetted with liquid weapon oil before entry into a warm place.
UNCLASSIFIED
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