Preliminary Requirements

Safety Requirements

WARNING

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

Procedure

1. SUBTASK 70-38-03-120-001 Prepare the Surface of the Part for the Application of the Dry Film Lubricant

   1. Clean the repair area of the part. Refer to SPM TASK 70-11-03-300-503 or SPM TASK 70-11-26-300-503.

   2. If the Engine Manual specifies to do abrasive blast surface preparation for the areas that needs to be applied with dry film lubricant, do the procedure that follows:

      1. Apply masking tape as necessary to give protection from the abrasive blast to the part surfaces that are adjacent to the areas that needs to be applied with dry film lubricant. Refer to SPM TASK 70-34-18-380-501 for applicable masking tapes.

      2. Do the abrasive blast surface preparation of the surfaces that needs to be applied with dry film lubricant. Refer to SPM TASK 70-12-02-120-501 (dry blast) or SPM TASK 70-12-01-120-501 (wet blast), but use the abrasive grit that the applicable repair instructions specify to use. If the applicable repair instructions do not specify the abrasive grit, use the applicable abrasive grit from the subsequent list:

         1. For steel parts, use CoMat 05-004 ABRASIVE MEDIUM, ALUMINUM OXIDE, 140/400 GRADE, CoMat 05-156 ALUMINUM OXIDE ABRASIVE, or CoMat 05-198 ALUMINUM OXIDE, 320-GRIT. When a surface finish coarser than 70 microinches (1.6 micrometers) is specified, it is permitted to use CoMat 05-003 ABRASIVE MEDIUM ALUMINUM OXIDE, 120/220 GRADE with the specified pressure.

         2. For nickel parts, use CoMat 05-156 ALUMINUM OXIDE ABRASIVE, CoMat 05-198 ALUMINUM OXIDE, 320-GRIT, or CoMat 05-230 ABRASIVE MEDIUM ALUMINUM OXIDE, 280/500 GRADE.

         3. For titanium parts, use CoMat 05-230 ABRASIVE MEDIUM ALUMINUM OXIDE, 280/500 GRADE.

   3. Remove the masking tape. If there are remaining tape adhesive on the part, use SPM TASK 70-11-26-300-503 to remove the remaining adhesive.

   4. Do the applicable procedure to remove the remaining abrasive from part:

      1. If you use a wet abrasive blast procedure to do the abrasive blast surface preparation, use SPM TASK 70-11-03-300-503 to clean the part.

      2. If you use a dry abrasive blast procedure to do the abrasive blast surface preparation, use clean, dry compressed air to blow the remaining abrasive off of the part.

   5. For aluminum parts, use SPM TASK 70-33-20-300-503 to anodize the part, or use SPM TASK 70-38-02-300-503 to apply chromate conversion coating to the repair area.

2. SUBTASK 70-38-03-380-004 Method to Apply the Dry Film Lubricants

   1. Clean the repair area with SPM TASK 70-11-26-300-503.

   2. Mask the part where specified by the Engine Manual. Use a tape from SPM TASK 70-38-24-300-503

   3. Mix the dry film lubricant to the manufacturer's instructions. Make sure the solids are in suspension, before you apply the lubricant. If it is necessary to add thinner to get the necessary viscosity, refer to the dry film lubricant manufacturer's instructions to add the applicable thinner.

   4. Apply the dry film lubricant as specified by the Engine Manual by one of the methods as follows:

      1. Apply by spray a number thin layers to produce a thickness of between 0.0001 in. to 0.0003 in. (0.003 mm to 0.008 mm), unless specified differently in the Engine Manual. Let the part become dry for 10 minutes between each layer.

      2. Apply by brush the dry film lubricant to produce a thickness of between 0.0001 in. to 0.0003 in. (0.003 mm to 0.008 mm), unless specified differently in the Engine Manual. Use a clean CoMat 02-018 BRUSH, PAINT to apply the dry film lubricant.

      3. Put the part fully into a diluted mixture of the dry film lubricant. Refer to the manufacturer's instruction for mixture make-up.

         1. To prevent air locks, slowly put the part fully into the lubricant and rotate the part. After a small number of seconds remove the part at a constant rate of 0.20 in. (5.00 mm) every minute. Repeat as necessary to produce a thickness of between 0.0001 in. to 0.0003 in. (0.003 mm to 0.008 mm). If the Engine Manual gives a different thickness of layer then follow the procedure given in the Engine Manual. Let the part become dry for a minimum time of 10 minutes between each layer.

   5. Remove the masking tape.

3. SUBTASK 70-38-03-380-005 Dry Film Lubricant Cure for Parts that Can be Heated (with CoMat 10-002, or CoMat 10-004, or CoMat 10-005)

   1. Put the part in an oven at 365 to 383 deg F (185 to 195 deg C) for two hours unless specified differently in the Engine Manual.

4. SUBTASK 70-38-03-380-006 Dry Film Lubricant Cure for Parts that Cannot be Heated (with CoMat 10-003, or CoMat 10-005, or CoMat 10-106, or CoMat 10-140)

   1. 
      CAUTION
      IF THE ENGINE MANUAL SPECIFIES CURE IN AIR DO NOT HEAT CURE, EVEN WHEN THE LUBRICANT CAN BE HEAT CURED.

      Let the part dry in air to the manufacturer's instructions.

      1. For CoMat 10-003 COLLOIDAL GRAPHITE DRY FILM LUBRICANT, typically permit the coating to cure for 1 hour before it is touched.

      2. For CoMat 10-005 COLLOIDAL MOLYBDENUM DISULFIDE IN TOLUENE, typically permit the coating to cure for 8 hours before it is touched.

      3. For CoMat 10-106 BONDED LUBRICANT or CoMat 10-140 DRY FILM LUBRICANT, MOLYBDENUM DISULFIDE, typically the coating is dry to touch after 30 minutes and is cured fully after 4 hours.

5. SUBTASK 70-38-03-220-001 Examine the Layer of Dry Film Lubricant

   1. Examine the layer of dry film lubricant on the part. Make sure the layer is equal in color on all the surface. The layer must be smooth and bonded correctly to the surface of the part. The layer must not have any cracks or flakes. Refer to the Step to correct any defects found in the layer of dry film lubricant.

6. SUBTASK 70-38-03-380-007 Correct the Defective Layer of Dry Film Lubricant

   1. Correct any defects found in the layer of dry film lubricant by reapplication of the specified lubricant. Use a clean CoMat 02-018 BRUSH, PAINT to apply the lubricant. Refer to Step.

   2. Cure the coating. Refer to Step and Step.

7. SUBTASK 70-38-03-160-001 Removal of the Dry Film Lubricant From Unwanted Areas

   1. To remove the layer of dry film lubricant from the part before the heat cure procedure, use CoMat 07-009 THINNER.

   2. To remove heat-cured dry film lubricant, use the procedure specified in the Engine Manual.