4. Procedure
_________
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL MATERIALS
_______
 ONLY WITH A GOOD SUPPLY OF AIR.
 OBEY THE MANUFACTURERS INSTRUCTIONS.
 PUT ON PROTECTIVE CLOTHING.
 DO NOT GET THEM IN YOUR MOUTH.
 DO NOT SMOKE.
 DO NOT BREATHE THE GAS.
 THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT.
 GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.

 Subtask 52-21-18-350-050
 A. Repair of the Chafe Marks
 NOTE : If the chafe marks are in the area where the door seal touches,
____
 replace the section (splice repair).

 (1) Prepare the chafe mark with very fine emery cloth.
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 (2)
 Carefully degrease the chafe mark with the CLEANING AGENTS (Material No. 11-016) and a lint-free cloth, MISCELLANEOUS (Material No. 19-003).

 (3)
 Apply a thin layer of BONDING AND ADHESIVE COMPOUNDS (Material No. 08-004) to the chafe mark with a SPATULA - NON METALLIC.

 (4)
 Prevent a dust layer on the treated chafe marks during the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-004) dry for a period of 10 to 12 hours.

 Subtask 52-21-18-330-050
 B. Repair of Minor Tears and Small Splits
 (Ref. Fig. 801/TASK 52-21-18-991-004)

 NOTE : A repair of tears is only permitted if they are not longer than
____ the half of the seal blade width. A repair of splits is only permitted if they are not longer than
 50.0 mm (1.9685 in.).
 In all other cases prepare a splice repair of the applicable seal.

 (1)
 Drill stop holes of 2.0 mm (0.0787 in.) dia. at each end of the damage.

 (2)
 Push the seal to open the cut and very carefully prepare the faces of the damage with emery cloth.

 (3)
 Carefully degrease the repair area with the CLEANING AGENTS (Material No. 11-004) and a lint-free cloth MISCELLANEOUS (Material No. 19-003).

 (4)
 Apply a thin layer of the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-004) to the faces of the damage.

 (5)
 Press the faces of the damage together and let them dry for some minutes.

 (6)
 Cut a piece of the tissue SPECIAL MATERIALS (Material No. 05-024) to a size necessary to cover the repair area (10.0 mm (0.3937 in.) larger than the damage).

 (7)
 Apply a thin layer of the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-004) to the repair area and fill the stop holes.

 (8)
 Put the prepared replacement tissue onto the repair area until it is as smooth as the seal surface.

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 Repair Areas and Repair Limitations of Primary and Secondary Seals
 Figure 801/TASK 52-21-18-991-004

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 (9) Remove the unwanted bonding and adhesive compound from the seal.
 (10) Give protection to the repair area against dust and let the bonding and adhesive compound dry for 10 to 12 hours.
 Subtask 52-21-18-330-051
 C. Repair of Blade and Bulb
 (Ref. Fig. 802/TASK 52-21-18-991-005, 803/TASK 52-21-18-991-006)

 NOTE : A repair of missing blade or bulb is only permitted if:
____
 -
the damage is not longer than 50.0 mm (1.9685 in.)

 -
the damage is not larger than one third of the seal width

 -
the damage area is not in the curved section of the primary

 seal. In all other cases prepare a splice repair of the applicable seal.
 (1)
 Prepare the damaged area with a emery cloth.

 (2)
 Carefully degrease the damaged area with the CLEANING AGENTS (Material No. 11-004) and a lint-free cloth MISCELLANEOUS (Material No. 19-003).

 (3)
 Cut a piece of the tissue SPECIAL MATERIALS (Material No. 05-024) to a size necesarry to cover the missing area (10.0 mm (0.3937 in.) larger than the damage).

 (4)
 Make sure that the missing area is covered on both sides.

 (5)
 Fill the contour of the missing part with the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-004) and cover it with the cut piece of tissue.

 (6)
 Put a layer of foil SPECIAL MATERIALS (Material No. 05-023) over the repair area and put the seal in the related wooden bonding block.

 (7)
 Compress the seal in the wooden bonding block using the C-clamp.
　
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