Preliminary Requirements

Procedure

1. SUBTASK 72-60-21-320-053 Mill the Lock Ring

   1. Refer to Figure, Figure, Figure, and Figure.

   2. Install the removal tool in drill press chuck.

      1. Use 5/16in. (7,937 mm) Drill, removal for lock ring 02-080, 02-240, 02-480, 02-560, 02-830.

         Use 29/64in. (11,506 mm) Drill, removal for lock ring 02-120, 02-510.

   3. Mill through lock ring to remove serration interlock.

      1. It is not necessary to mill fully through the lock ring.

2. SUBTASK 72-60-21-350-054 Remove the Insert

   1. Apply the removal torque to the insert.

      1. Drive the square screw extractor into the insert.

      2. Continuous pressure of withdrawn insert could cause lock ring to be forced out from its location.

      3. Break with a punch and remove the remaining portion of lock ring if it has been milled fully through and it does not lift out with the insert.

   2. Complete the removal of the insert.

3. SUBTASK 72-60-21-350-055 Install the New Insert

   1. Refer to Figure, Figure, Figure, and Figure.

   2. Lubricate the coarse threaded insert end.

      1. Use CoMat 10-048 LUBRICANT.

      2. Start insert into housing.

   3. Install the insert.

      1. The depth is given in Figure.

      2. Use R1106W Wrench, installation for insert 02-090, 02-250, 02-490, 02-570, 02-840.

      3. Use R1108W Wrench, installation for insert 02-130, 02-520.

   4. If the threaded hole in the Main Gearbox Casing is damaged too much to adequately support the insert, refer to the following repair:

      1. For insert 02-520, refer to repair, VRS5707 TASK 72-60-21-300-056 (REPAIR-056).

4. SUBTASK 72-60-21-350-056 Install the Lock Ring

   1. Refer to Figure, Figure, Figure, and Figure.

   2. Install the new lock ring.

      1. Align the external serrations of the new lock ring with those in parent material of the housing.

   3. Seat the new lock ring.

      1. Seat the new lock ring to depth given in Figure.

      2. Use R206D Drive tool, installation for lock ring 02-080, 02-240, 02-480, 02-560, 02-830.

      3. Use R208D Drive tool, installation for lock ring 02-120, 02-510.

5. SUBTASK 72-60-21-330-054 Restore the Damaged Anodic Treatment

   1. Check the surface.

      1. Do the touch up process if the anodic treatment has been damaged by insert installation.

      2. Refer to SPM TASK 70-38-02-300-503.

6. SUBTASK 72-60-21-230-054 Crack Test the Repaired Area

   1. Do a crack test on the repaired area.

      1. Refer to SPM TASK 70-23-01-230-501.

Figure: Replace damaged inserts and lock rings

Replace damaged inserts and lock rings



Figure: Replace damaged inserts and lock rings

Replace damaged inserts and lock rings



Figure: Replace damaged inserts and lock rings

Replace damaged inserts and lock rings



Figure: Replace damaged inserts and lock rings

Sheet 4



Legend

Replace damaged inserts and lock rings

Sheet 4

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