Preliminary Requirements

Procedure

1. SUBTASK 72-45-30-440-086 Install the Stage 2 HPT Heatshield (72-45-31, 01-020) and Stage 2 HPT Metering Plugs (72-45-31, 01-030) on the Stage 2 Turbine Hub (72-45-31, 01-011)

   1. Refer to Figure and Figure.

   2. Install the Heatshield on the Stage 2 Turbine Hub Shaft.

      1. Install the Heatshield with the larger diameter down over the shaft of the hub.

      2. Visually align the eight holes in the Heatshield with the holes in the hub and seat the Heatshield on the upper end of the hub.

      3. Put the IAE 1P17765 Alignment pin 1 off through a hole in the Heatshield and the hub.

   3. Attach the Heatshield to the Stage 2 Turbine Hub with the four metering plugs that are equally spaced.

      1. Put a metering plug on the IAE 1P17766 Metering plug holder 1 off detail adapter with the plug tab down.

      2. Install the metering plug into the hole, adjacent to the alignment pin, on the hub inner diameter and through the Heatshield (plug flanged end to contact the inner diameter of the hub). Do not seat the plug.

      3. Install the metering plug holder detail drift through the hole in the Heatshield and hub, 180 degrees from the installed metering plug and engage the drift and adapter.

      4. Seat the installed metering plug with the drift.

         NOTE

         The detail drift will fit through the inner diameter of the metering plug.

      5. Do the procedure again for the three metering plugs that remain.

      6. Remove the alignment pin and holder details.

   4. Examine the clearance between the metering plugs and the inner diameter of the hub.

      1. Clearance must be 0.002 in. (0.051 mm) or less.

      2. If clearance is more than 0.002 in. (0.051 mm), seat the metering plug again.

2. SUBTASK 72-45-30-440-087 Install the Fixture and Remove the Stage 2 Turbine Hub (72-45-31, 01-011) from the Pallet

   1. Refer to Figure.

   2. Remove the support detail from the IAE 1P16366 Fixture 1 off.

   3. Remove the clevis and bar assembly from the bottom end of the fixture (flanged end).

   4. Loosen the nuts holding the three clamps in the pilot.

   5. Push the clamps to move the dowel pins from the holes in the pilot.

   6. Turn the clamps to align the clamp feet within the pilot body envelope for installation in the Stage 2 Turbine Rotor Assembly. The dowel pin in the threaded end of the clamp is now located at 90 degrees to the arrow in the adjacent pilot face.

   7. Attach a hoist to the fixture.

   8. Lift the fixture with the hoist and then lower the pilot of the fixture into the ID of the Stage 2 Turbine Hub.

   9. Turn the fixture clamps to engage the dowel pins in the pilot holes. The dowel pins in the thread end of the clamps are now in line with the arrows in the adjacent pilot face.

   10. Tighten the three nuts to lock the clamps in position.

   11. Install a hoist to the bar on the top of the fixture.

   12. Lift the Stage 2 Turbine Hub from the pallet.

3. SUBTASK 72-45-30-440-088 Install the Stage 2 Turbine Hub (72-45-31, 01-011) in the Heater

   1. Refer to Figure.

   2. Attach a second hoist to the lower bar on the fixture.

   3. Turn the Stage 2 Turbine Hub, with the two hoists, to the small end down.

   4. Remove the bar and clevis from the bottom end of the pilot (flanged end).

   5. Lower the Stage 2 Turbine Hub, small end down, in to the IAE 1P16039 Heater 1 off.

   6. Put the fixture pilot in to the heater ID.

   7. Turn the Stage 2 Turbine Hub and align the holes in the heater with the threaded holes in the fixture.

   8. Attach the fixture to the heater with the fixture capscrews.

   9. Make sure the thermocouple touches the Stage 2 Turbine Hub.

   10. Connect the power line and the thermocouple fitting to the respective fittings of the IAE 1F10027 Heater control unit 1 off.

   11. Remove the clevis and bar assembly from the pilot in the IAE 1P16366 Fixture.

4. SUBTASK 72-45-30-220-059 Reference Fits and Clearances of the Stage 2 Turbine Hub and Stage 2 HPT Heatshield at Location 1500

   1. Refer to Figure.

   2. Reference clearance at location 1500. If required use the data written as a note in TASK 72-45-31-200-000 (INSPECTION/CHECK-000).

      Table 1. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1500
      Stage 2 Turbine Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Stage 2 HPT Heatshield ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-020), Location Diameter
      Stage 2 Turbine Hub Location Diameter	5.520
      	5.524	0.002
      Stage 2 HPT Heatshield Location Diameter	5.526	0.012
      	5.532

      Table 2. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1500
      Stage 2 Turbine Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Stage 2 HPT Heatshield ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-020), Location Diameter
      Stage 2 Turbine Hub Location Diameter	140.208
      	140.309	0.051
      Stage 2 HPT Heatshield Location Diameter	140.360	0.305
      	140.513

5. SUBTASK 72-45-30-220-060 Reference Fits and Clearances of the Stage 2 Blade Retaining Plate and the Stage 2 HPT Hub at Location 1506

   1. Refer to Figure.

   2. Reference interference/clearance at location 1506. If required use the data written as a note in TASK 72-45-33-200-000 (INSPECTION/CHECK-000) and TASK 72-45-31-200-000 (INSPECTION/CHECK-000).

      Table 3. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1506
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Location Diameter
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Retaining Plate Diameter	17.210	Intf	17.2084	Intf
      	17.214	0.004	17.2146	0.0051
      Hub Diameter	17.210	0.005	17.2095	0.0076
      	17.215	Clear	17.216	Clear

      Table 4. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1506
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Location Diameter
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Retaining Plate Diameter	437.134	Intf	437.093	Intf
      	437.235	0.102	437.251	0.130
      Hub Diameter	437.134	0.127	437.121	0.193
      	437.261	Clear	437.286	Clear

6. SUBTASK 72-45-30-220-061 Reference Fits and Clearances of the Stage 2 HPT Metering Plug and the Stage 2 HPT Hub at Location 1514

   1. Refer to Figure.

   2. Reference interference at location 1514. If required use the data written as a note in TASK 72-45-31-200-000 (INSPECTION/CHECK-000).

      Table 5. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1514
      Stage 2 HPT Metering Plug ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-030), Location Diameter
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Stage 2 HPT Metering Plug Location Diameter	0.262
      	0.264	0.002
      Stage 2 HPT Hub Location Diameter	0.254	0.010
      	0.260

      Table 6. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1514
      Stage 2 HPT Metering Plug ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-030), Location Diameter
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Location Diameter
      Stage 2 HPT Metering Plug Location Diameter	6.655
      	6.706	0.051
      Stage 2 HPT Hub Location Diameter	6.452	0.254
      	6.604

7. SUBTASK 72-45-30-220-062 Reference Fits and Clearances of the Stage 2 Blade Retaining Plate and the Stage 2 HPT Hub at Location 1553 (SBE 72-0145 Post - Introduced New Stage 2 Turbine Hub)

   1. Refer to Figure.

   2. Reference clearance at location 1553. If required use the data written as a note in TASK 72-45-33-200-000 (INSPECTION/CHECK-000) and TASK 72-45-31-200-000 (INSPECTION/CHECK-000).

      Table 7. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1553
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Axial Dimension
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Axial Dimension D
      Retaining Plate Dimension	0.224		0.221
      	0.234	0.000	0.234	0.000
      Hub Dimension D	0.234	0.016	0.234	0.019
      	0.240		0.240

      Table 8. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1553
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Axial Dimension
      Stage 2 HPT Hub ENGINE-STAGE 2 TURBINE HUB (72-45-31, 01-011), Axial Dimension D
      Retaining Plate Dimension	5.690		5.613
      	5.944	0.000	5.944	0.000
      Hub Dimension D	5.944	0.406	5.944	0.483
      	6.096		6.096

8. SUBTASK 72-45-30-220-063 Reference Fits and Clearances of the Stage 2 Blade Retaining Plate and the Stage 2 HPT Hub at Location 1554 (SBE 72-0145Post - Introduced new stage 2 turbine hub)

   1. Refer to Figure.

   2. Reference interference at location 1554. If required use the data written as a note in TASK 72-45-33-200-000 (INSPECTION/CHECK-000) and TASK 72-45-31-200-000 (INSPECTION/CHECK-000).

      Table 9. Fits and Clearances (all dimensions are in inches)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1554
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Axial Dimension A
      Stage 2 HPT Blade HPT Stage 2 Blade And Related Parts (72-45-32, 01-010), Axial Dimension B
      Retaining Plate Dimension A	0.242	Intf	0.242	Intf
      	0.232	0.008	0.225	0.008
      Blade Dimension B	1.158	0.016	1.158	0.022
      	1.152	Clear	1.152	Clear
      Hub Dimension C	1.162		1.162
      	1.158		1.158
      Hub Dimension D	0.240		0.240
      	0.234		0.234
      Clearances Is Found By The Formula That Follows: (C + D) - (A + B)

      Table 10. Fits and Clearances (all dimensions are in millimeters)

      	NEW PART		WORN PART
      	DIMENSIONS		DIMENSIONS
      PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
      LOCATION 1554
      Stage 2 Blade Retaining Plate HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-020), Axial Dimension A
      Stage 2 HPT Blade HPT Stage 2 Blade And Related Parts (72-45-32, 01-010), Axial Dimension B
      Retaining Plate Dimension A	6.150	Intf	6.150	Intf
      	5.890	0.203	5.715	0.203
      Blade Dimension B	29.413	0.406	29.413	0.559
      	29.261	Clear	29.261	Clear
      Hub Dimension C	29.515		29.515
      	29.413		29.413
      Hub Dimension D	6.096		6.096
      	5.944		5.944
      Clearance Is Found By The Formula That Follows: (C + D) - (A + B)

9. SUBTASK 72-45-30-440-089 Install the Stage 2 Blade Retaining Plate (72-45-33, 01-020) in the Fixture

   1. Refer to Figure and Figure.

   2. Put the Stage 2 Blade Retaining Plate, seal up, on a bench.

   3. Install the new HPT Stage 2 Blade Retaining Plate And Related Parts (72-45-33, 01-010) Stage 1 and 2 HPT seal 1 off, in the groove in the Blade Retaining Plate. If necessary, use CoMat 01-573 WAX BLEND, PARAFFIN to hold the seal in the groove.

      1. If necessary, cut one end of the seal to keep the clearance of 0.030 in. (0.8 mm) minimum to 0.225 in. (5.7 mm) maximum between the two ends.

   4. Put the IAE 1P16010 Fixture 1 off ring (clamp), with the threaded boltholes up, on the seal flange of the blade retaining plate.

   5. Attach the eight clamps with the capscrews and the washers around the ring, to capture the blade retaining plate seal flange.

   6. Arrange the clamps so the side with the greatest taper contacts the ring.

   7. Tighten the capscrews to hold the clamps in place.

   8. Install the ring (flanged) over the ring (clamp) and secure it with the capscrews.

   9. Tighten the capscrews until the gap between the flange and the ring (clamp) is removed.

10. SUBTASK 72-45-30-440-090 Install the Blade Retaining Plate (72-45-33, 01-020) on to the Stage 2 Turbine Hub

    1. Refer to Figure, Figure and Figure.

       NOTE

       Parts may be heated to 300 deg F (149 deg C) maximum to permit assembly. Minimum temperature differential to be 50 deg F (10 deg C).

    2. Heat the Stage 2 Turbine Hub with the IAE 1P16039 Heater 1 off.

    3. Make the retaining plate seal flange cool with dry ice.

    4. Raise the fixture above the heater and lower the blade retaining plate on to the hub.

    5. Put the blade retaining plate in the correct position.

       1. Put the plate so that it forms a vector stack with respect to the Stage 2 Turbine Hub. Use the balance marks.

       2. Make sure the lugs in the blade retaining plate align with the slots in the hub.

    6. Engage the blade retaining plate with the hub.

    7. Hit the turn lugs lightly with a mallet to turn the blade retaining plate with the fixture to the lock position.

    8. Make sure the slots in the blade retaining plate are in the correct position to install the Stage 2 HPT locks and keys.

    9. Remove the fixture from the Stage 2 Turbine Hub.

11. SUBTASK 72-45-30-440-091 Install the Turbine Blade Lock Retainer (72-45-33, 01-040) and the Stage 2 HPT Locks (72-45-33, 01-060)

    NOTE

    Pre SBE 72-0399 Stage 2 HPT locks and retainers should not be used in service. Stage 2 HPT Rotor Assembly must be equipped with four locks and retainers.

    1. Refer to Figure, Figure and Figure.

       NOTE

       Do not use the old retainer or the retainer that was bent once. Use a new retainer.

       NOTE

       If HPT Stage 2 Hub has "X" marked on each side of the slot do not install the retaining plate lock and key, another slot must be used.

       NOTE

       If HPT Stage 2 Retaining Plate has "X" or "MS" marked at the slot location do not install the retaining plate lock and key, another slot must be used.

    2. Install the blade lock retainers and locks into four slots in Stage 2 Turbine Hub and the blade retaining plate, 90 degrees apart.

       1. Place the retainer in one of the selected slots wing first, with the wing on the OD side of the slot. Refer to Figure and Figure.

       2. While holding the retainer's position against the front surface, slide the lock into slot and guide the retainer tab into the center of the lock.

       3. Push the lock flush to the surface of the disk.

12. SUBTASK 72-45-30-440-092 Install the Hold/Bend Fixture, PN IAE 1P16479 on the Stage 2 Turbine Hub and Bend the Retainer Tabs

    1. Refer to Figure and Figure.

    2. Orient the top plate with the cutout facing away from the engine centerline as shown in Figure and Figure.

    3. Make sure that the legs are aligned to slide into the slots in the retaining plate.

       NOTE

       If the legs do not engage the side plate while tightening, increase the effective leg length by turning the knobs one or two turns to the left and then try again.

    4. With the top plate in place, turn the leg knobs to the right to secure tool to the side plate/disk assembly.

    5. When the top plate is properly secured, insert the lever arm into the slot by holding the lever arm parallel to the hub and turning the end into the slot counterclockwise. Once in the slot, slide lever arm to the left and straighten to the upright position, perpendicular to the hub.

       NOTE

       It can help to angle the tip of the arm toward engine center and rotate it up after you see that the retainer starts coming toward you.

    6. Use the lever arm to hold the retainer/lock assembly up, such that the retainer is accessible for bending. Make sure the tool is positioned approximately three-quarters of the way toward the lock assembly.

    7. While holding the lever arm in place, loosen the thumbscrew on the collar and slide the collar's notch over the lever arm's hub.

    8. Tighten the thumbscrew and make sure that the handle is securely held in place.

13. SUBTASK 72-45-30-350-002 Bend the Retainer

    1. Refer to Figure and Figure.

    2. Center the slot of the bender on the retainer's protruding tab. Bend the retainer away from the engine centerline 30 degrees to initiate the bend.

    3. Use the angled end of the drift with a mallet to bend the tab three-quarters of the way to the surface of the HPT retaining plate.

       NOTE

       Fixture thumbscrew must remain tight during bend operation.

    4. Flip the drift over and use the flat end to finish bending the retainer to be sure it is perpendicular to the HPT retaining plate.

14. SUBTASK 72-45-30-040-094 Remove the Hold/Bend Fixture, PN IAE 1P16479

    1. Loosen the thumbscrew on the collar while holding the handle of the lever arm.

    2. Withdraw the collar from the lever arm and remove the lever arm from the HPT in reverse order of inserting.

    3. Loosen the leg knobs one turn and withdraw from the slots.

15. SUBTASK 72-45-30-220-099 Examine the Assembly to be Sure it Meets Requirements

    1. Refer to Figure and Figure.

    2. Tab must be parallel to disk surface as shown in Figure and Figure.

    3. Measure the gap between the top of the lock and the inside surface of the retainer tab. Requirement: gap must be not more than 0.035 in. (0.89 mm).

    4. Repeat procedures for the remaining selected slots until all four locks and retainers are properly installed.

16. SUBTASK 72-45-30-440-093 Remove the Stage 2 Turbine Rotor Assembly from the Heater and Turn It So the Large End Is Down

    1. Refer to Figure and Figure.

    2. Install the bar and clevis on the top end of the IAE 1P16366 Fixture 1 off.

    3. Remove the fixture capscrews, Figure.

    4. Attach a hoist to the bar on the fixture.

    5. Lift the Stage 2 Turbine Rotor Assembly from the IAE 1P16039 Heater with the hoist.

    6. Install the clevis and bar assembly to the lower end of the fixture pilot.

    7. Attach a second hoist to the bar on the lower end of the pilot.

    8. Turn the assembly with the two hoists, so the large end is down.

    9. Remove the hoist, the bar and the clevis from the lower end of the assembly.

17. SUBTASK 72-45-30-440-094 Install the Stage 2 Turbine Rotor Assembly in to The Support

    1. Refer to Figure.

    2. Lower the Stage 2 Turbine Rotor Assembly in to the IAE 1P16368 Support 1 off.

    3. Put the bore of the hub on the detail which is in the center of the support.

    4. Remove the IAE 1P16366 Fixture from the assembly.

18. SUBTASK 72-45-30-440-095 Moment Weigh the Stage 2 HPT Blades (72-45-32, 01-010)

    NOTE

    If new or fully repaired Stage 2 HPT Duct Segments (BOAS) are to be installed, two thirds of Stage 2 HPT blades must have fully repaired tips. One third of the blades can have complete, partial, or no tip coating.

    1. Refer to Figure.

    2. Install and attach the IAE 1P16016 Blade adapter 1 off to the lever arm on the moment weighing equipment.

    3. Zero the moment weighing equipment.

       NOTE

       The blade must touch the dowel pin and the root must be seated on the pin.

    4. Install the blade root on the dowel pin in the locator assembly. Lift the clamp and move the blade root to the side of the blade adapter.

    5. Release the pressure on the clamp and adjust the slide support so the blade will locate square on the face of the locator and tighten the cap screw.

    6. Moment weigh the blade.

    7. Remove the blade from the blade adapter.

       NOTE

       Use an approved felt tip marker (fine/extra fine/ultra fine) CoMat for aluminide coat.

    8. Mark the moment weight on the concave side of the blade airfoil. Use CoMat 06-153H FELT TIP MARKER, RAPID DRYING, FINE POINT, BLACK, CoMat 06-153K FELT TIP MARKER, RAPID DRYING, FINE POINT, BLUE, CoMat 06-153L FELT TIP MARKER, RAPID DRYING, FINE POINT, RED, CoMat 06-153P FELT TIP MARKER, RAPID DRYING, CoMat 06-153Q FELT TIP MARKER, RAPID DRYING, CoMat 06-153S FELT TIP MARKER, RAPID DRYING, ULTRA FINE POINT, RED, CoMat 06-153T FELT TIP MARKER, RAPID DRYING, ULTRA FINE POINT, BLUE, CoMat 06-153U FELT TIP MARKER, RAPID DRYING, BOLD FINE POINT, BLACK, CoMat 06-153V FELT TIP MARKER, RAPID DRYING, BOLD FINE POINT, RED or CoMat 06-153W FELT TIP MARKER, RAPID DRYING, BOLD FINE POINT, BLUE (Refer to SPM TASK 70-09-01-400-501).

    9. Do the moment weight procedure again for each of the blades in the assembly.

19. SUBTASK 72-45-30-440-096 Install the Stage 2 HPT Blade Assemblies (72-45-32, 01-010)

    1. Refer to Figure and Figure.

       NOTE

       A blade set contains two blades of equal weight or near as possible to the same weight.

    2. Put the moment weighed stage 2 HPT blades HPT Stage 2 Blade And Related Parts (72-45-32, 01-010) in to 36 sets on a bench.

    3. Position the blade sets in to two rows.

       1. Put one blade of a set at the top of row one. Put the other blade at the top of row two.

       2. Put the next blade set under the first blade in rows one and two. Continue this until you have 36 blades in each row.

    4. Install the first blade from row one in to any blade slot on the turbine front hub with the leading edge (thicker edge) pointed up by hand pressure.

       1. 

          CAUTION

          FAILURE TO REPLACE AN ADEQUATE NUMBER OF BLADE TIPS MAY REDUCE ENGINE PERFORMANCE AND/OR REDUCE BLADE AND OUTER AIRSEAL REPAIRABILITY. IT IS RECOMMENDED TO MINIMIZE THE NUMBER OF CAT C BLADES INSTALLED.

          Install the No. 2 blade from row one in the hub adjacent to the first installed blade in a counterclockwise direction.

          NOTE

          The blades must be installed in a counterclockwise direction with the leading edge (thicker edge) pointed up.

          NOTE

          Up to 24 of the blades installed may be Cat C blades, which possess a limited cutting ability. Cat C blades have been fully repaired, but the tip has not been fully restored. At component repair, these blades are ink marked on the airfoil Cat C.

       2. Install the remaining blades from the top of row one in the same direction and then start at the top of row two and install the remaining blades.

    5. Install the IAE 1P16221 Fixture 1 off to the assembly.

       1. Loosen the two screws that hold the two jaw segments and move the segments to the inner position.

       2. Install the fixture into the front inner diameter of the Stage 2 Turbine Rotor Assembly.

       3. Position the jaw segments into the inner groove of the hub and tighten the two screws.

    6. Attach a hoist to the lifting eyes on the fixture.

    7. Lift the assembly to clear the support.

    8. Lightly hit the Stage 2 Turbine Blades until they are at the bottom of the blade slots.

20. SUBTASK 72-45-30-440-097 Install the Fixture on A Vertical Balance Machine

    1. Refer to Figure.

    2. Install the eye bolts in the top of the IAE 1P17020 Fixture 1 off.

    3. Put the fixture on a vertical balance machine.

    4. Attach the fixture to the machine with the capscrews.

21. SUBTASK 72-45-30-440-098 Install the Stage 2 Turbine Rotor Assembly in to the Fixture

    1. Refer to Figure.

    2. Release the hydraulic chucks actuation pressure.

    3. Remove the capscrews and the spline.

    4. Remove the master from its storage position around the large hydraulic chuck.

    5. Move the Stage 2 Turbine Rotor Assembly above the fixture with a hoist.

    6. Lower the assembly, large end down, on to the fixture.

    7. Remove the IAE 1P16221 Fixture from the assembly.

    8. Install the spline into the spline of the rotor assembly and align the dowel pin in the spline with the hole in the arbor.

       1. Turn the rotor assembly slightly to align the dowel pin in the hole. The part and the tool align when the spline face contacts the front face of the Stage 2 Turbine Rotor Assembly.

    9. Install the four capscrews and tighten by hand.

    10. Turn the center actuation screw to expand the two hydraulic chucks to put the Stage 2 Turbine Rotor Assembly in the center of the arbor.

    11. Tighten the capscrews to hold the spline in place.

    12. Do a check for balance machine calibration.

        1. Install the IAE 1P16033 Calibration weight 1 off in any of the 36 slots on the front side of the hub.

        2. Put the two dowel pins in the slot.

        3. Hold the weight in place with tape.

           NOTE

           The weight is made to produce a moment of 4 ozin (2880 gm mm).

        4. Calibrate the balance machine.

        5. Remove the calibration weight and put it in the storage container.

22. SUBTASK 72-45-30-440-099 Balance the Stage 2 Turbine Rotor Assembly

    1. Refer to Figure and Figure.

    2. Turn the assembly at 900 rpm.

    3. Correct unbalance to within 0.5 ozin (360 gm mm) by moving the Stage 2 HPT Blade Assemblies.

    4. Mark the location of the Stage 2 HPT Blade Assemblies in a counterclockwise direction and remove the blades.

    5. Assemble the Stage 2 HPT Blades at the identical marked locations by the steps that follow.

       NOTE

       1. Blade must be installed in a counterclockwise direction at the identical marked locations.

       2. Blades must not be fully installed in the blade slots of the hub. This lets you install the blade seals and damper in to the first installed blade after all the blades are installed.

       1. Install the first blade (not fully in the blade slot of the hub) at the identical location with the leading edge (thicker edge) pointed up.

       2. Install a Stage 2 Blade Seal HPT Stage 2 Blade And Related Parts (72-45-32, 01-040) and a Stage 2 Blade Damper HPT Stage 2 Blade And Related Parts (72-45-32, 01-020) to the No. 2 marked blade as follows:

          1. Install a seal in to the right side of the blade platform pocket.

          2. Then install a damper in to the blade platform on the inner side of the seal.

       3. 

          CAUTION

          MAKE SURE THAT THE BLADE SEAL AND DAMPER ARE IN THE CORRECT POSITION AFTER THE BLADE IS INSTALLED. DAMAGE TO THE PARTS CAN OCCUR IF THEY ARE NOT INSTALLED CORRECTLY.

          Carefully install the No. 2 blade, seal and damper adjacent to the first installed blade.

       4. Install the remaining blades in the same way until you have installed all the blades in to the hub.

       5. Install the last blade seal and damper in to the right side of the first installed blade.

       6. Lightly hit the Stage 2 HPT Blades until they are at the bottom of the blade slots.

    6. Do a check for balance per Step.

    7. If unbalance of complete assembly exceeds 0.8 ozin (576 gm mm) correct by moving the Stage 2 HPT Blade Assemblies.

    8. Make a mark to show the amount and position of the final unbalance by the CoMat 06-153 FELT TIP MARKER, RAPID DRYING, CoMat 06-153X FELT TIP MARKER, RAPID DRYING, FINE POINT, BLACK, TRACE ELEMENT CERTIFIED or CoMat 06-158 MARKER, EXTRA FINE POINT(BLACK). Refer to SPM TASK 70-09-00-400-501 and Figure.

23. SUBTASK 72-45-30-440-102 Remove the Stage 2 Turbine Rotor Assembly from the Fixture

    1. Refer to Figure.

    2. Release the hydraulic chucks actuation pressure.

    3. Remove the capscrews and the spline.

    4. Install the IAE 1P16221 Fixture 1 off to the assembly.

       1. Loosen the two screws that hold the two jaw segments and move the segments to the inner position.

       2. Install the fixture into the front inner diameter of the Stage 2 Turbine Hub Assembly.

       3. Position the jaw segments into the inner groove of the hub and tighten the two screws.

    5. Attach a hoist to the fixture.

    6. Lift the assembly from the balance machine with the hoist.

    7. Put the Stage 2 Turbine Rotor Assembly on a pallet, large end down.

    8. Remove the IAE 1P16221 Fixture from the assembly.

24. SUBTASK 72-45-30-440-103 Install the Fixture

    1. Install the IAE 1P16366 Fixture 1 off per Step.

       1. Use the support detail to keep the blades in position.

25. SUBTASK 72-45-30-440-104 Install the Retainers to the Stage 2 Turbine Rotor Assembly (DELETED)

    1. This subtask has been deleted.

26. SUBTASK 72-45-30-440-105 Turn the Stage 2 Turbine Rotor Assembly to the Small End Down and Install It in the Support Base

    1. Refer to Figure.

    2. Raise the Stage 2 Turbine Rotor Assembly.

    3. Attach the clevis and bar to the bottom end of the fixture.

    4. Attach a second hoist to the assembly.

    5. Turn the Stage 2 Turbine Rotor Assembly to the small end down with the two hoists.

    6. Remove the bar and clevis from the bottom end of the fixture.

    7. Lower the Stage 2 Turbine Rotor Assembly into the IAE 1P16140 Support base 1 off.

    8. Remove the fixture from the assembly.

    9. Remove the retainers from the assembly.

Figure: Install the Heatshield and the Metering Plugs

Install the Heatshield and the Metering Plugs



Figure: Install the Heatshield and the Metering Plugs

Install the Heatshield and the Metering Plugs



Figure: Remove the Stage 2 Turbine Rotor Assembly from the Pallet

Remove the Stage 2 Turbine Rotor Assembly from the Pallet



Figure: Install the IAE 1P16010 Fixture

Install the IAE 1P16010 Fixture



Figure: Stage 2 Turbine Rotor Assembly Fits and Clearances

Stage 2 Turbine Rotor Assembly Fits and Clearances



Figure: Check the Stage 1 and 2 HPT Seal Gap

Check the Stage 1 and 2 HPT Seal Gap



Figure: Location of Balance Marks

Location of Balance Marks



Figure: Install the Stage 2 HPT Locks and Turbine Blade Lock Retainers

Install the Stage 2 HPT Locks and Turbine Blade Lock Retainers



Figure: Install the Stage 2 HPT Locks and Turbine Blade Lock Retainers

Install the Stage 2 HPT Locks and Turbine Blade Lock Retainers



Figure: Remove the Stage 2 Turbine Rotor Assembly from the IAE 1P16039 Heater

Remove the Stage 2 Turbine Rotor Assembly from the IAE 1P16039 Heater



Figure: Stage 2 IAE 1P16016 Moment Weight Blade Adapter

Stage 2 IAE 1P16016 Moment Weight Blade Adapter



Figure: Install the Stage 2 HPT Blade Assemblies

Install the Stage 2 HPT Blade Assemblies



Figure: Install the IAE 1P16221

Install the IAE 1P16221



Figure: Install the Stage 2 Turbine Rotor Assembly in the IAE 1P17020 Fixture

Install the Stage 2 Turbine Rotor Assembly in the IAE 1P17020 Fixture



Figure: Install the Stage 2 HPT Seals and the Dampers and make an Unbalance Mark

Install the Stage 2 HPT Seals and the Dampers and make an Unbalance Mark



Figure: Remove the Stage 2 Turbine Rotor Assembly from the IAE 1P17020 Fixture

Remove the Stage 2 Turbine Rotor Assembly from the IAE 1P17020 Fixture



Figure: Install The IAE 1P16164 Retainer

Install The IAE 1P16164 Retainer



Figure: The Stage 2 Turbine Rotor Assembly in the IAE 1P16140 Base

The Stage 2 Turbine Rotor Assembly in the IAE 1P16140 Base



Figure: Repair Markings

Repair Markings