TIL-GENORID

INSTRUCTION SHEET - GENORID (030891)

Tippman O-Ring Identification and Use

REVISION B - DESTROY ALL OTHER COPIES

DISCUSSION: User trouble in identifying o-rings purchased in kits for Tippmanns Pneumatic's paintball guns, and in determining when to replace them or where to use them. See also TIL-SMGSEAL AND TIL-SMGOIL. Pneumatic Ordnance o-ring kits are total kits, comprising ALL the o-rings in the guns concerned. Certain kits have extra tank valve o-rings. Some o-rings are used less often than other's or only in specific situations. All are also sold separately or in packages of two.

     One o-ring can have different uses in the same gun and unrelated uses in other models. It is therefore difficult to name them separately. They are identified by size, and are measured by their internal diameter and cross section thickness. The outer diameter is rarely used but is given here for ease of identification. The color, material, particular gun, service and probable usage rate are also listed for consumer information.

     Whenever an o-ring is suspect, replace it without hesitation. Never attempt to salvage one, or try to determine if it is usable by eye or touch. These methods are unreliable and problem prone. Junk it for the slightest reason. Noeprene o-rings should not be used in conjunction with petroleum based oils or in high pressure conditions unless well restrained. Urethane tolerates oils and high pressure better but may  be more expensive. Buna resists chemical attack very well, and is more cost effective than urethane. Teflon should not be used in sliding applications. Viton strikes a balance between rough service, attack and absorption. Liquid operation and using siphon cylinders may cause gas and gun valve seals to erode and leak sooner.

7/8" x 1" x 1/16" - Black Buna (Milky urethane from factory)
   SMG60 1st Gen, SMG60 2nd Gen, SMG-68 and 68 Special - Used as main or rear bolt seal, and as gun valve ring seal. Low pressure and only under fire. High movement on bolt, moderate movement on gun valve ring, dirty environment. Moderate usage, replace at the beginning of season and more often if regular use or in dusty conditions. Set of two.

3/4" x 15/16" x 3/32" - Black Buna
   68 Special Only - Used as power tube face seal. Low pressure and under fire. No movement, clean environment. Zero to low usage, replace only if lost or damaged. One o-ring.

5/8" x 3/4" x 1/16" - Black Buna
   SMG60 1st Gen Only - Used as gun valve body seal. High and constant pressure. Moderate movement, clean environment. Moderate usage, replace at beginning of season, when in heavy use or whenever the gun valve is removed. Set of two.

9/16" x 11/16" x 1/16" White Teflon (Milky urethane from factory)
   SMG60 1st Gen, SMG60 2nd Gen, SMG68, 68 Special and SL68 - Used as cylinder pin valve seal. High and constant pressure. Low movement but dirty environment and rough service. High usage if not kept clean and greased, or if cylinder is not inserted vertically. Clean, inspect and re-grease whenever cylinder is refilled. Replace instantly if the slightest imperfection is seen. Do not use black neoprene or buna. One o-ring, spares recommended.

9/16" x 11/16" x 1/16" - Black Buna
   68 Special - Used as front bolt breech seal. Low pressure and only under fire. Moderate movement, dirty environment. Moderate usage, replace each season, more often if in regular use or in dusty conditions. One o-ring.
   SL68 II - Used as receiver end cap seal. High and constant pressure. Low movement, but dirty environment and rough service. High usage if not kept clean and greased. One o-ring, spares recommended.
1/2" x 11/16" x 3/32" - Black Buna (Milky Urethane from factory)
   SL68 Only - Used as bolt breech seal. Low pressure area and only when under fire. Moderate movement, dirty environment. Low usage, replace each season or if no compression is felt on closing bolt. One o-ring.

7/16" x 5/8" x 3/32" - Brown Viton (black neoprene or buna from factory)
   CAM Constant Air Magnum Steel 4.5 and 9 Ounce CO2 Cylinders - Used for pin valve end seal. High and constant pressure. No movement, but dirty environment and rough service. High usage if not glued in with gasket cement. Buna or urethane o-rings will pop out easily from CO2 absorption and expansion on depressurization. Replace as necessary from loss or damage. Do not peen in, keep greased. One o-ring.

3/8" x 1/2" x 1/16" - Black Buna (Milky Urethane from factory for SL68 only)
   SMG60 1st Gen, SMG60 2nd Gen, SMG68 and 68 Special - Used for gun valve plunger cup seals (gun valve plunger collars or seats). High and constant pressure area. no movement, clean environment. Low usage, replace if gun valve is disassembled or leaking. Easily damaged on removal of plunger. Do not mistake for plunger seal leakage. Set of two.
   SL68 - Used for gas valve body seal. High and constant pressure area. Low movement, clean environment. Low usage on SL II, high on 1st gen. SL. Easily damaged on 1st gen SL68 valve removal. Do not mistake for valve seal leakage. One o-ring on 1st gen., two on SL68 II.

5/16" x 7/16" x 1/16" - Black Buna
   68 Special Only - Used for retaining bolt link to bolt handle and front bolt arm. No pressure. Low usage, replace as necessary or if visibly damaged or worn. Set of two.

3/16" x 5/16" x 1/16" - Black Buna
   SMG 1st Gen - Used for gas line elbow and gun valve screw (rear sight) seals. High and constant pressure. No movement, dirty environment. Low usage, replace if damaged or slow leaks develop. Set of three.
   SMG60 2nd Gen, SMG68 and 68 Special - Used as packing for rear gas tube ferrule compression screw protrusion adjustment. High and constant pressure. No movement, clean environment. Zero to low usage, replace equal number when gas tube is replaced, add or remove as necessary to change protrusion of screw. One to three may be needed.
   Tippmann Pneumatic's 3.5, 7 and 20 Ounce CO2 Cylinders - Used as pin valve rupture disk seal. High and constant pressure. No movement. clean environment. Low usage, replace whenever rupture disk is replaced. One o-ring.

5/32" x 7/32" x 1/32" - Black Buna
   SMG60 1st Gen Only - Used for gas line screw seals. High and constant pressure. No movement, clean environment. Low usage, not available except when purchasing the entire gas line assembly. Use 3/16" x 1/4" x 1/32" o-rings with slight bevel on the edge of the screw hole, or automotive form-a-gasket compounds.


This document is retyped from a low quality copy that was hard to read. I don't type but the information is so important that it had to be done.                                                             SML


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Title - TIL-GENORID
Revised - 08/22/13