Preliminary Requirements

Procedure

1. SUBTASK 72-00-45-020-066 Remove the Bearing Retaining Nut

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

   2. Remove the cover from the rear of the HP turbine rotor and stator assembly.

   3. Remove the retaining ring which holds the No. 4 bearing lock in position Fig. 72-00-45-990-026.

   4. Remove the No. 4 bearing lock.

   5. Install the IAE 1P17509 Protective cover 1 off to the rear flange of the HP turbine rotor and stator assembly.

   6. Install the bearing retaining nut tools.

      1. Loosen the wingnuts on the four clamp assemblies on the IAE 1P17025 Adapter or IAE 1P17047 Adapter.

      2. Move the clamps in the clockwise direction (opposite direction of the arrow).

      3. Pull up on the clamp until the clamp foot makes a continuous surface with the surface of the tooth on the adapter.

      4. Tighten the wingnuts to hold the clamps in this position.

      5. Attach two nylon straps to the slots in the side of the adapter.

      6. Before positioning the teeth of the adapter, align slots of HPT stage 2 hub and HPT stage 2 Blade Retaining Plate. Use plastic or wooden rod and mallet.

      7. 

         CAUTION

         TURN THE ADAPTER SO THE TEETH ARE ALIGNED WITH THE MODULE SLOTS. THIS PREVENTS DAMAGE TO THE SIDES OF THE SLOTS.

         Lift the adapter in position and engage the teeth of the adapter with the slots on the stage 2 turbine hub.

      8. Loosen the wingnuts and push the clamps in until the clamp foot contacts the hub.

      9. Move the clamp assemblies in the counterclockwise direction (direction of the arrows) until the four pins can be installed. Tighten the wingnuts.

      10. If you use IAE 1P17047 Adapter, install the IAE 1P16589 Retainer by the procedure that follows:

          1. Remove the four clamps (Detail 4) and captured screws (Detail 3) from the ends of each of the straps (Detail 1).

          2. Install the four straps (Detail 1) into the slots on the IAE 1P17047 Adapter.

          3. Do for each strap.

             1. Torque the two captured screws (Detail 2) to 20 lbfin (2.26 Nm) to attach the strap (Detail 1) to the IAE 1P17047 Adapter.

          4. Align the opposite side of four straps to the HPT case flange boltholes.

          5. Attach the straps to the HPT case with four clamps (Detail 4) below the HPT case flange, you can use captured screws (Detail 3). Torque to 40 lbfin (4.519 Nm).

          6. Torque the two captured screws (Detail 2) to 40 lbfin (4.519 Nm).

          7. Increase the torque of captured screws (Detail 3) to finish torque value of 80 lbfin (9.039 Nm).

      11. Install the IAE 1P16011 Wrench 1 off through the adapter to engage the retaining nut spline.

          NOTE

          You Can use IAE 1F10016 Mechanical wrench as an alternative to IAE 1F10015 Hydraulic wrench.

      12. Lift the IAE 1F10015 Hydraulic wrench 1 off with a hoist and install over the wrench and engage the anti-torque pins on the hydraulic wrench with the holes in the adapter.

      13. Tighten the hexagon head bolts to hold the hydraulic wrench to the adapter.

   7. Operate the hydraulic wrench to release the retaining nut.

   8. Remove the bearing retaining nut tools.

      1. Release the hexagon head bolts and remove the hydraulic wrench from the adapter.

      2. Remove the wrench from the nut.

      3. If you use IAE 1P17047 Adapter then do the procedure that follows:

         1. Remove the captured screws (Detail 3) from the four clamps (Detail 4) on IAE 1P16589 Retainer.

         2. Remove the two captured screws (Detail 2) from the four straps (Detail 1) on IAE 1P16589 Retainer.

         3. Remove the four straps (Detail 1) from the slots in the IAE 1P17047 Adapter.

         4. Remove the IAE 1P16589 Retainer from the IAE 1P17047 Adapter and HPT Case.

      4. Release all the wingnuts on the clamp assemblies.

      5. Move the clamp assemblies in the clockwise direction (opposite direction of the arrows).

      6. Remove the adapter from the stage 2 turbine hub.

         NOTE

         The bearing retaining nut must be silver plated when you install or remove the nut more than five times or engine operation has occurred.

   9. Remove the bearing retaining nut from the engine with the IAE 1P16284 Hand wrench 1 off.

   10. Remove the protective cover.

2. SUBTASK 72-00-45-220-262 Examine the Stage 2 Turbine Hub for Damage

   1. Examine the Stage 2 Turbine Hub for dents, nicks and scratches that occurred during the disassembly process.

      1. Dents, nicks and scratches.

         1. Disassemble, and then Repair. Refer to Repair, VRS3238 TASK 72-45-31-300-001 (REPAIR-001).

3. SUBTASK 72-00-45-020-067 Install the Tooling to remove the HP Turbine Rotor and Stator Assembly

   1. Refer to Figure and Figure

   2. Install the IAE 1P16048 Heater 1 off to the IAE 1P16046 Removal/Installation fixture or IAE 1P16543 Removal/Installation fixture 1 off before the fixture is installed to the engine.

      1. Lift the fixture with a hoist (in one of the hoist rings) to the horizontal position.

      2. Install the heater to the front face of the fixture with the four capscrews, washers and nuts. Tighten the nuts.

      3. Remove the fixture and heater assembly from the hoist.

   3. Install the fixture with the heater to the HP turbine rotor and stator assembly.

      1. Attach a standard two-cable sling to the two hoist rings on the fixture and attach the sling to a hoist. Lift the fixture and heater assembly.

      2. Loosen the hand knobs and move the center ring of the fixture to the rear until the flanged end is in line with the front surface of the hub of the fixture.

      3. Tighten two of the hand knobs (one in each row) to hold the center ring in this position.

      4. Install the fixture and heater assembly to the rear flange of the HP turbine case with the offset hole in the fixture over the dowel pin in the HP turbine case flange.

      5. Attach the fixture with the two rings against the HP turbine case rear flange front face and the large offset hole over the flare of the dowel pin. Hold in position with the 25 bolts and nuts.

      6. Hold the fixture center ring and release the hand knobs.

      7. Move the center ring down until it touches the rear face of the stage 2 turbine hub.

      8. Remove the sling and the hoist.

   4. Install the IAE 1P17022 Removal/installation jaws assembly 1 off.

      1. Install the four jaws in to the stage 2 turbine hub bore.

      2. Move the jaws radially out so the lip on the jaws engage the groove on the hub and the socket head capscrews engage the flange of the fixture center ring.

      3. Install the jaw assembly sleeve in to the jaws to move the jaws out.

      4. Align the slots in the sleeve with the large socket head capscrews.

      5. Install the sleeve until the flange contacts the jaws.

      6. Attach the jaws to the sleeve with the eight capscrews. Tighten the four socket head capscrews.

      7. Tighten all the hand knobs on the fixture to keep the rotor to stator relation.

   5. Install the IAE 6F10027 Heater control unit 1 off to the heater installed on the fixture.

   6. Heat the stage 2 turbine hub to 400 deg F (204 deg C).

   7. Install the IAE 1F10052 Two cables sling 1 off to a hoist and to the two lifting spools on the fixture.

   8. Lift the fixture until the cables have the correct tension.

4. SUBTASK 72-00-45-020-068 Remove the HP Turbine Rotor and Stator Assembly from the Engine

   1. Refer to Figure.

   2. Remove the bolts and the nuts which hold the HP turbine case front flange to the rear flange of the diffuser case.

   3. Install the jackscrews in the threaded holes around the case front flange.

   4. Install the IAE 1P16264 Dry ice fixture 1 off into the inner diameter of the HP compressor rear shaft.

      1. Make sure the stage 2 turbine hub has reached the necessary temperature of 400 deg F (204 deg C).

      2. Remove the puck from the fixture freeze pot and fill with dry ice. Install the puck on to the freeze pot.

         NOTE

         Do not connect the air to the fixture at this time.

      3. Install the fixture into the inner diameter of the HP compressor rear shaft.

   5. Install the IAE 1P16272 Adapter 1 off to the rear flange of the IAE 1P16046 Removal/Installation fixture or IAE 1P16543 Removal/Installation fixture 1 off.

      1. Install the scalloped flange of the adapter to the fixture with the 12 hexagon head bolts. Tighten the bolts.

         NOTE

         The small threaded adapter for the hydraulic cylinder is not used for removal.

      2. Install the hydraulic cylinder into the adapter.

      3. Attach the IAE 1F10026 Hydraulic hand pump 1 off to the hydraulic cylinder.

   6. Put a 10000 lbf (44482.2 N) hydraulic load on the stage 2 turbine hub.

   7. Apply air to the IAE 1P16264 Dry ice fixture 1 off.

   8. Install and turn the jackscrews in equally on the case front flange sufficiently to loosen the case diameter fit.

   9. Apply hydraulic pressure and pump the HP turbine off until the turbine is released from the HP compressor rear shaft.

   10. Release the hydraulic pressure and remove the jackscrews from the case.

5. SUBTASK 72-00-45-020-069 Remove the Tooling from the HP Turbine Rotor and Stator Assembly

   1. Refer to Figure and Figure

   2. Disconnect the heater control from the heater.

   3. Disconnect the hand pump from the hydraulic cylinder.

   4. Disconnect the air supply from the dry ice fixture.

   5. Lower the HP turbine rotor and stator assembly (front and down) to the IAE 1P16028 Build stand 1 off, Figure.

   6. Remove the hoist and the sling.

   7. Raise the center of the stand to contact the front face of the rotor.

   8. Remove the adapter from the rear face of the fixture Figure.

      1. Remove the hydraulic cylinder from the adapter.

      2. Remove the 12 hexagon head bolts which hold the adapter to the fixture and remove the adapter from the fixture.

      3. Install the 12 bolts in to their storage positions.

   9. Remove the bolts which secure the jaw assembly sleeve to the jaws on the rear of the stage 2 turbine hub.

   10. Remove the sleeve and the four jaws.

   11. Remove the fixture from the rear of the HP turbine rotor and stator assembly.

       1. Remove the bolts and the nuts which secure the fixture to the rear face of the rear flange of the HP turbine case and the two rings to the front face of the flange.

       2. Attach a standard two point sling to the two hoist rings on the fixture and attach the sling to a hoist.

       3. Remove the fixture from the HP turbine rotor and stator assembly.

       4. Remove the four bolts, washers and nuts which secure the heater to the fixture and remove the heater.

   12. Remove the dry ice fixture from the HP compressor rear shaft.

6. SUBTASK 72-00-45-220-253 Inspect for Soot and Oil

   1. Visually inspect front interface of HPT Rotor and Stator Assembly for soot and oil. If soot and oil found, perform oil ignition event inspection TASK 72-45-00-200-801. Report all findings to IAE Technical Services.

   2. Visually inspect rear face of No. 4 Bearing Compartment for soot and oil. If soot and oil found, perform oil ignition event inspection TASK 72-45-00-200-801. Report all findings to IAE Technical Services.

7. SUBTASK 72-00-45-020-070 Remove the No. 4 Bearing Spacer

   1. Refer to Figure.

   2. Install the IAE 1P16125 Puller 1 off to the No. 4 bearing spacer with the lip of the jaws on the puller grooves on the spacer.

   3. Install the ring of the puller over the jaws of the puller until it is seated.

   4. Turn in the center bolt of the puller to release the spacer from the HP compressor shaft.

   5. Remove the puller and the spacer from the engine.

   6. Remove the spacer from the puller.

   7. Install the IAE 1P16109 cover 1 off (with the center flap open) over the stage 1 turbine nozzle assembly. Put hand pressure on the outer edge of the cover to hold in position.

   8. Install the IAE 1P16060 Protective cover 1 off or the IAE 1P17758 Protective cover 1 off to the rear flange of the HP turbine rotor and stator assembly. Put equal hand pressure on the outer edge of the cover to hold in position.

Figure: HP Turbine Rotor and Stator Assembly and Related Parts

HP Turbine Rotor and Stator Assembly and Related Parts



Figure: Release the Bearing Retaining Nut

Release the Bearing Retaining Nut



Figure: Hydraulic Wrench Package

Hydraulic Wrench Package



Figure: Remove the Bearing Retaining Nut

Remove the Bearing Retaining Nut



Figure: Removal Tooling for the HP Turbine Rotor and Stator Assembly

Removal Tooling for the HP Turbine Rotor and Stator Assembly



Figure: Removal Tooling for the HP Turbine Rotor and Stator Assembly

Removal Tooling for the HP Turbine Rotor and Stator Assembly



Figure: Install the HP Turbine Rotor and Stator Assembly to the Stand

Install the HP Turbine Rotor and Stator Assembly to the Stand



Figure: Remove the No. 4 Bearing Spacer

Remove the No. 4 Bearing Spacer



Figure: IAE 1P16589 Retainer Exploded View

IAE 1P16589 Retainer Exploded View



Figure: Misaligned Slot Between HPT Stage 2 Hub And HPT Stage 2 Blade Retaining Plate

Misaligned Slot Between HPT Stage 2 Hub And HPT Stage 2 Blade Retaining Plate