Shooting Sports USA - July 2010 - 16

FEATURE // AIRGUN MAINTENANCE

AirGun MAintenAnce
Written by a respected professional in the airgun industry, gunsmith for olympic-style 10m airguns and owner of PilkGunS, Scott Pilkington shares his insights on how to keep your investment in top condition.

By Scott PilkinGton
n this article I will focus primarily on compressed air rifles and pistols. Compressed air, as powered by SCUBA tanks or high-pressure hand pumps, is also known as CA or PCP (Pre-Charged Pneumatic).

I

Notice the glove used during transfer of air charge from the fill apparatus into the gun’s cylinder to protect from the extremely cold temperature— as low as –700 F.

The first issue with a CA gun is transferring the air charge from the fill apparatus into the gun’s cylinder. At this point in the match airgun market, I know of only one manufacturer that uses a non-detachable cylinder—the Air Arms Pistol. All other brands of 10m air rifles and pistols use a removable cylinder that mounts under the barrel and should be easily removed with hand pressure alone. I am assuming you have already figured out whether you are using a high-pressure pump or a SCUBA tank to fill your cylinder and know how to remove it. When reinstalling your cylinder, you should never use tools to tighten a CA cylinder onto the gun. You can easily over-tighten it and damage the threads. Every time you install the cylinder on the gun, you should visually inspect that there is no dirt or other debris adhering to the threads. If you see any foreign objects, you should thoroughly clean

the thread with something that has hard plastic bristles like a toothbrush. While you are looking at the cylinder threads, inspect for any grease. A very small “smidgeon” of synthetic grease should be applied to the threads every 20 to 30 times that you remove the cylinder. This “smidgeon” should only be about the size of a pinhead. Too much grease is just as bad as not enough. You can also apply a very small amount of the same grease to the end of your finger and smear some on the sealing o-ring or the surface that meets the sealing o-ring on the cylinder. (Some manufacturers have the o-ring on the cylinder and others place it inside the action.) It is VERY IMPORTANT that you do not get any grease or oil near the air valve on the end of the cylinder. This periodic lubing will prevent galling between the cylinder threads and receiver mount. Some brands of 10m guns are known to become dry and gall badly, thus freezing the cylinder in place. When such a cylinder is finally removed with great force, it will have stripped, leaving a major portion of the threads unusable. This will result in a trip to your airgun

16 SSUSA JULY 2010

PHOTO BY KARI MURPHY



Shooting Sports USA - July 2010

Table of Contents for the Digital Edition of Shooting Sports USA - July 2010

Shooting Sports USA - July 2010
Competitor’s Corner
Contents
Shooter’s News
Product Focus
Book Review
Shooter Spotlight
Score Sheet
Airgun Maintenance
First NRA Intercollegiate Rifle Club Championship
NRA Intercollegiate Pistol Championships
NCAA Rifle Championships
ACUI Clay Target Championships
A Page From History
Coming Events
Member Info./Classified Ads
Shooting Sports USA - July 2010 - Shooting Sports USA - July 2010
Shooting Sports USA - July 2010 - Competitor’s Corner
Shooting Sports USA - July 2010 - 3
Shooting Sports USA - July 2010 - Contents
Shooting Sports USA - July 2010 - 5
Shooting Sports USA - July 2010 - 6
Shooting Sports USA - July 2010 - Shooter’s News
Shooting Sports USA - July 2010 - Product Focus
Shooting Sports USA - July 2010 - Book Review
Shooting Sports USA - July 2010 - Shooter Spotlight
Shooting Sports USA - July 2010 - 11
Shooting Sports USA - July 2010 - Score Sheet
Shooting Sports USA - July 2010 - 13
Shooting Sports USA - July 2010 - 14
Shooting Sports USA - July 2010 - 15
Shooting Sports USA - July 2010 - Airgun Maintenance
Shooting Sports USA - July 2010 - 17
Shooting Sports USA - July 2010 - First NRA Intercollegiate Rifle Club Championship
Shooting Sports USA - July 2010 - 19
Shooting Sports USA - July 2010 - 20
Shooting Sports USA - July 2010 - 21
Shooting Sports USA - July 2010 - NRA Intercollegiate Pistol Championships
Shooting Sports USA - July 2010 - NCAA Rifle Championships
Shooting Sports USA - July 2010 - ACUI Clay Target Championships
Shooting Sports USA - July 2010 - A Page From History
Shooting Sports USA - July 2010 - Coming Events
Shooting Sports USA - July 2010 - 27
Shooting Sports USA - July 2010 - 28
Shooting Sports USA - July 2010 - 29
Shooting Sports USA - July 2010 - 30
Shooting Sports USA - July 2010 - 31
Shooting Sports USA - July 2010 - 32
Shooting Sports USA - July 2010 - 33
Shooting Sports USA - July 2010 - 34
Shooting Sports USA - July 2010 - 35
Shooting Sports USA - July 2010 - 36
Shooting Sports USA - July 2010 - 37
Shooting Sports USA - July 2010 - 38
Shooting Sports USA - July 2010 - Member Info./Classified Ads
Shooting Sports USA - July 2010 - Cover4
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