Preliminary Requirements

Safety Requirements

WARNING

IT IS THE RESPONSIBILITY OF THE OPERATOR TO OBTAIN AND OBSERVE THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS, HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL MEASURES AND ALSO TO TAKE LOCAL REGULATIONS INTO CONSIDERATION.

Procedure

1. SUBTASK 70-64-02-640-001 Identification

   1. Flexible seal rings are identified by the part numbers on the envelopes in which each ring is contained. Each envelope is identified with the minimum data that follows:

      1. Name of the part.

      2. Quantity.

      3. Engine manufacturers part number.

      4. Cure date.

   2. The storage life of a seal ring is calculated from the cure date identified on the envelope. To find the cure date, a year is divided into the four quarters that follow:

      1. First quarter = January, February and March.

      2. Second quarter = April, May and June.

      3. Third quarter = July, August and September.

      4. Fourth quarter = October, November and December.

   3. The quarter number and the year, broken by the letter Q, shows the cure date. For example, a cure date of 2Q71 shows a cure date of the second quarter (That is April, May or June) of 1971. The storage life can then be calculated from this date.

   4. Shelf life determination.

      1. The shelf life of Rubber seals is as follows:

         		Initial period	Extension
         Group A	Natural Polysulphide	5 years	2 years
         Group B	Butyl Polyacrylate, Nitrile, Polychloroprene (Neoprene) and PVC/Nitrile	7 years	3 years
         Group X	Silicone, Perfluorocarbon, Fluorocarbon and Fluorosilicone	No life limitation

      2. To extend the life of components inspect the components to ensure there is no mechanical damage, surface cracking or change in surface condition.

   5. The seal ring material is identified by the color of the ring material, or by the color code marks on the outer diameter of the ring. A seal ring identification table of color codes in relation to material codes and materials is given in Figure.

2. SUBTASK 70-64-02-640-002 Lubrication

   1. The lubrication of installed flexible seal rings, to help assemble units or parts, is different for each system where seal rings are used. To prevent fast deterioration of the seal rings, always apply a small quantity of the recommended lubricant immediately before the units or parts are installed.

   2. The lubricants to be used for seal ring lubrication are as follows:

      1. Seal rings in oil systems - CoMat 10-077 APPROVED ENGINE OILS.

      2. Seal rings in fuel systems - CoMat 10-077 APPROVED ENGINE OILS or CoMat 10-087 SEALING RING LUBRICANT.

      3. Silicone rubber seals in air systems - None.

      4. NOTE

         To prevent damage to rigid air system seals (Made from SE/DTA or WAF code materials) light lubrication with CoMat 10-077 APPROVED ENGINE OILS.

         Fluorocarbon seals in air systems - CoMat 10-077 APPROVED ENGINE OILS.

   3. The recommended lubricant must be applied to the seal in small quantities immediately before you install the unit or part. This makes sure that the ring can not become soaked with lubricant and thus become too large. If the ring does become soaked with lubricant it can be damaged when you install the unit or part.

3. SUBTASK 70-64-02-640-003 Installation of the Flexible Seal Rings

   1. Use new seal rings for the assembly of units or parts.

   2. Make sure that the life and condition of the seal ring is satisfactory, refer to Step.

   3. Make sure that the mating faces (to which the seal rings must be installed) are clean, smooth and not damaged.

   4. Make sure that installed seal rings are not twisted and are correctly installed in the groove.

   5. Do not install the seal ring to an engine part that is hot. This can make the seal ring become larger and thus easy to damage.

   6. If the seal is not installed correctly, put a soft thin cord through the seal and use it to carefully put the seal in the groove. remove the cord carefully, this will prevent the seal from twisting.

   7. Use a straight push to install the ferrules and tubes into their mating connectors, this will prevent twisted or damaged rings.

Figure: Seal ring identification table

Seal ring identification table



Figure: Seal ring identification table

Seal ring identification table