Preliminary Requirements

Procedure

1. SUBTASK 72-41-21-330-070 Remove all Existing Surface Damage

   1. Remove all existing wear, scratches, galling and/or coating from the repair area to the limits shown in Figure by machining. Remove the minimum amount of parent material necessary to accomplish the repair.

2. SUBTASK 72-41-21-110-280 Clean the Axial Surfaces

   1. Clean the part by SPM TASK 70-11-03-300-503.

3. SUBTASK 72-41-21-220-765 Examine the Part

   1. If grind procedure is done, do a fluorescent penetrant inspection of the repair area by SPM TASK 72-41-21-200-017.

   2. Do a dimensional inspection of the repair area. See Figure.

4. SUBTASK 72-41-21-220-766 Prepare the Part for Coat

   1. Prepare the part for coating by SPM TASK 70-34-18-380-501. See Figure.

      1. Mask the area not to be coated. Ensure the adjacent existing hard coating on the part outer diameter is masked if it exists. Grit blast outside the repair area is not permitted.

      2. Grit blast the repair area.

5. SUBTASK 72-41-21-340-070 Apply Plasma Coat to the Repair Area

   1. Apply plasma coat to the repair area by IAE 53-47. Refer to SPM TASK 70-34-03-340-501-002. See Figure.

      1. Coat to a sufficient thickness to allow for finishing.

      2. Mask the area not to be coated. Ensure the adjacent existing hard coating on the part outer diameter is masked if it exists. Coat outside the repair area is not permitted.

6. SUBTASK 72-41-21-350-274 Remove the Masking

   1. Remove the masking. Remove any tape residue by SPM TASK 70-11-26-300-503.

7. SUBTASK 72-41-21-324-060 Grind the Plasma Coat

   1. Finish the repair area to the limits shown in Figure by SPM TASK 70-32-07-100-501.

      1. Finish coating thickness must be 0.003 in. to 0.006 in. (0.077 mm to 0.152 mm).

      2. All machined surfaces to be 32 micro-inches (0.8 micro-meter).

8. SUBTASK 72-41-21-110-281 Clean the Axial Surfaces

   1. Clean the part by SPM TASK 70-11-03-300-503.

9. SUBTASK 72-41-21-220-767 Examine the Axial Surfaces

   1. Do a visual inspection of the repair coating. Refer to Section 70-34-03 in the V2500 Standard Practices Manual.

   2. Do a visual inspection of the existing hard coating on the outer diameter.

      1. No damage permitted.

   3. Do a dimensional inspection of the repaired area. See Figure.

10. SUBTASK 72-41-21-350-275 Identify the Repair

    1. Mark the part with "VRS9305" adjacent to the assembly part number using the vibration peen method by SPM TASK 70-09-00-400-501.

Figure: Repair Details and Dimensions

[1] 0.1445 in. (3.6703 mm) Minimum Width After Machining To Remove Wear And Damage.



Legend

1

[1] 0.1445 in. (3.6703 mm) Minimum Width After Machining To Remove Wear And Damage. [2] For 6A2506 Only: 0.030 in. - 0.050 in. (0.762 mm - 1.270 mm), Stay-Away Zone From Edge Of Existing Hard Coat. No Machining, Grit Blast Or Repair Coat Allowed Into This Area. [3] 0.015 in. - 0.032 in. (0.381 mm - 0.812 mm) Radius.

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Figure: Repair Details and Dimensions

[1] Repair Area. Grit Blast And Plasma Coat Required In This Area.



Legend

1	[1] Repair Area. Grit Blast And Plasma Coat Required In This Area. [2] Grit Blast And Plasma Coat Not Permitted In This Area.

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Figure: Repair Details and Dimensions

[1] 0.003 in. - 0.006 in. (0.077 mm, - 0.152 mm) Coating Thickness.



Legend

[1]

[1] 0.003 in. - 0.006 in. (0.077 mm, - 0.152 mm) Coating Thickness. [2] Chamfer, 0.030 in. - 0.049 in. (0.762 mm - 1.244 mm) X 43 Degrees To 47 Degrees, Two Locations. [3] Chamfer, 0.010 in. - 0.020 in. (0.254 mm - 0.508 mm) X 43 Degrees To 47 Degrees, Two Locations. [4] 0.1565 in. - 0.1585 in. (3.9751 mm - 4.0259 mm).

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