Preliminary Requirements

Procedure

1. SUBTASK 72-00-50-020-140 Remove the Module Dressings

   1. NOTE

      If the compartment cover and the turbine blind cap are not installed continue with Step.

      Remove the module dressings. Refer to TASK 72-00-50-020-001-A00 (REMOVAL-001 CONFIG-001).

2. SUBTASK 72-00-50-020-141-A00 Remove the No. 5 Bearing Compartment Cover (Pre SBE 72-0173)

   1. Refer to Figure.

   2. Remove the 12 bolts that attach the compartment cover to the exhaust case.

   3. Remove the rear thermal blanket.

   4. Make sure that the expansion case of the IAE 1F10036 Removal puller 1 off is at the rear position.

   5. Engage the removal puller on to the compartment cover. Make sure that the three clamps are correctly engaged behind the flange at the compartment cover.

   6. Turn the expansion case clockwise until the three spring-loaded braces are in a stable position on the compartment cover.

   7. Move the sliding hammer rearwards quickly to hit the handle.

   8. Do Step until the compartment cover is free from the exhaust case.

   9. Loosen the expansion case. Move the expansion case rearwards until the compartment cover is free from the removal puller.

3. SUBTASK 72-00-50-220-141-B00 Remove the No. 5 Bearing Compartment Cover (SBE 72-0173)

   1. Refer to Figure.

   2. Remove the 12 bolts that attach the compartment cover to the exhaust case.

   3. Remove the rear thermal blanket.

   4. Make sure that the three jaws of the IAE 1P17038 Slide puller 1 off are in the outward position. Make sure that the three jaws are correctly engaged behind the flange at the compartment cover.

   5. Tighten the three screws until the three jaws are in a stable position on the compartment cover.

   6. Move the knocker puller rearwards quickly to hit the handle.

   7. Do Step until the compartment cover is free from exhaust case.

   8. Loosen the three screws. Move the three jaws until the compartment cover is free from the slide puller.

4. SUBTASK 72-00-50-020-142 Remove the Blind Cap of the LP Turbine Shaft

   1. Refer to Figure.

   2. Remove the internal retaining ring of the blind cap.

   3. Install the IAE 1J12221 Impact hammer 1 off into the turbine shaft. Make sure that the piston of the impact hammer is correctly aligned with the turbine shaft.

   4. Move the hammer forward until the head touches the blind cap. Push against the body of the impact hammer until the jaws engage into the groove of the blind cap.

   5. Move the hammer rearwards quickly until it hits the grip.

   6. Do Step until the blind cap is free from the turbine shaft.

   7. Remove the impact hammer and the blind cap from the LP turbine shaft.

   8. Release the head of the impact hammer and remove the blind cap.

   9. 

      CAUTION

      DO NOT DAMAGE THE SURFACE OF THE BLIND CAP SLOT WITH THE HAND TOOLS WHEN YOU REMOVE THE SEALING RING. DAMAGE TO THE SURFACE CAN CAUSE AN OIL LEAK.

      NOTE

      If the removal of the No. 5 bearing inner-race and the carbon seal is necessary continue with Step.

      Remove and discard the sealing ring from the blind cap.

5. SUBTASK 72-00-50-020-143 Remove the Rear Lock Nut

   1. Refer to Figure.

   2. Disengage the retaining ring from the rear lock nut. Remove the retaining ring with the locking ring from the rear lock nut.

   3. Attach the IAE 1F10037 Wrench support 1 off to the rear flange of the TEC.

   4. Install the IAE 1F10038 Torque wrench 1 off through the wrench support. Engage the torque wrench with the rear lock nut of the LP turbine shaft.

   5. Install the IAE 1F10039 Anti-torque adapter 1 off through the torque wrench. Lock the anti-torque adapter to the LP turbine shaft.

   6. Install the IAE 1F10016 Mechanical wrench 1 off to the torque wrench. Lock the anti-torque adapter to the mechanical wrench with the IAE 1F10040 Anchor wrench plate 1 off.

   7. Operate the mechanical wrench to release the rear lock nut.

   8. Remove the tools from the engine as follows:

      1. Remove the anchor wrench plate and the mechanical wrench.

      2. Disengage the lock mechanism of the anti-torque adapter and remove the adapter.

      3. Remove the torque wrench.

      4. Remove the wrench support.

   9. Remove the rear lock nut of the LP turbine shaft.

6. SUBTASK 72-00-50-020-144 Disconnect the Oil Feed Tube of the No.5 Bearing

   1. Refer to Figure.

   2. Remove the three nuts and bolts which attach the bracket to the oil feed tube and to the external TEC flange. Remove the bracket.

   3. Remove the nut and the bolt which attaches the clamp on the oil feed tube to the bracket. Remove the clamp.

   4. Remove the two nuts and bolts which attach the bracket to the inner support of the TEC. Remove the bracket.

   5. Remove the three bolts which attach the flange of the oil feed tube to the No. 5 bearing compartment. Disconnect the tube from the flange and discard the metallic seal.

7. SUBTASK 72-00-50-020-145 Remove the Oil Jet and Filter of the No.5 Bearing

   1. Refer to Figure.

   2. Release and remove the oil filter from the oil jet. Use the IAE 1P16426 remove/installation driver 1 off.

   3. Move the oil transfer tube rearward into the oil jet until the removal of the oil jet is possible.

   4. Move the oil jet forward and disengage it from the front flange of the No. 5 bearing compartment. Remove the oil jet.

   5. Remove the oil transfer tube from the oil jet and discard the two seal rings.

   6. Put all removed parts in a protective bag.

8. SUBTASK 72-00-50-020-146 Install the Guide Pogo Stick to the LP Turbine Shaft

   1. Refer to Figure.

   2. Install the IAE 1F10074 Guide pogo stick 1 off in the inner diameter of the LP turbine shaft. Use an applicable webbing sling.

   3. Make sure that the centering diameter of the guide pogo stick is installed correctly in the LP turbine shaft. Turn the screw clockwise at the rear end of the guide pogo stick to hold the guide pogo stick in the LP turbine shaft.

   4. Put the IAE 1F10075 Support pedestal A 1 off below the guide pogo stick. Move the support pedestal A near the rear flange of the TEC. Turn the handwheel A until the pedestal-screw touches the guide pogo stick. Lock the pedestal-screw in that position with the handwheel B.

9. SUBTASK 72-00-50-020-147 Install the Remove/Installation Fixture to the TEC

   NOTE

   Make sure that the jack screw of the IAE 1F10073 remove/installation fixture 1 off is in the rear position.

   1. Refer to Figure.

   2. Attach the hoist equipment to the upper supports of the remove/installation fixture.

   3. Install the remove/installation fixture on the guide pogo stick. Move the remove/installation fixture forward near the support pedestal A. Remove the hoist equipment from the remove/installation fixture.

   4. Put the IAE 1F10075 Support pedestal B 1 off below the rear end of the guide pogo stick. Refer to Step.

   5. Remove the support pedestal A.

   6. Move the remove/installation fixture against the rear flange of the TEC. Align the holes. Attach the remove/installation fixture with the 13 bolts and washers. Tighten the bolts.

   7. Remove the hoist equipment.

10. SUBTASK 72-00-50-020-148 Remove the TEC from the LP Turbine Case

    1. Refer to Figure.

    2. Attach the electronic balance scale to the hoist equipment. Attach the IAE 1F10051 Two cable sling 1 off to the balance scale. Connect the two cables sling to the front two spools, part of the IAE 1F10073 remove/installation fixture 1 off.

    3. Take the weight on the crane until the balance scale shows the value of approximately 815 lb (370 kg).

    4. 

       CAUTION

       MAKE SURE THAT THE BALANCE SCALE REMAINS AT THE INDICATED WEIGHT OF APPROXIMATELY 815 LB (370 KG).

       Release the handwheel B of the support pedestal B. Turn the handwheel A. Make sure that the pedestal screw touches the guide pogo stick. Take the weight of the LP turbine rotor. Lock with the handwheel B.

    5. 

       CAUTION

       HOLD THE BOLTS IN THEIR POSITION WHEN YOU LOOSEN AND REMOVE THE NUTS FROM THE BOLTS. DO NOT TURN THE BOLTS OR MAKE TO-AND-FRO MOVEMENTS. THE LP TURBINE CASE/TURBINE EXHAUST CASE FLANGE AND/OR THE BOLTS CAN BE DAMAGED.

       Remove the 114 bolts, washers, nuts and 16 brackets from the TEC and from the LP turbine case.

    6. NOTE

       Control the weight increase on the balance scale of the LP turbine rotor which remains on the guide pogo stick.

       Turn the jack screw (part of the remove/installation fixture) clockwise until the TEC and the LP turbine case are disconnected. Make sure that the carbon seal and the inner/outer races of the No.5 bearing are disengaged.

    7. If the balance scale shows a weight increase, release the handwheel B of the support pedestal B. Turn the handwheel A until the balance scale shows the initial value of approximately 815 lb (370 kg).

    8. Move the TEC carefully to the rear of the guide pogo stick near the support pedestal B.

11. SUBTASK 72-00-50-020-149 Install the Supporting Fixture

    NOTE

    Measure the inner hub diameter of Stage 7 Disk before you install the supporting fixture.

    NOTE

    If the inner hub diameter is 12.595 in. (319.9 mm) use IAE 1M14086 Supporting fixture

    If the inner hub diameter is 12.441 in. (316 mm) use IAE 1M14461 Supporting fixture

    1. Refer to Figure.

    2. Install the IAE 1M14086 Supporting fixture or the IAE 1M14461 Supporting fixture 1 off at the 12 o'clock position on the rear flange of the LP turbine case. Attach the supporting fixture with the four screws and washers/ Tighten the bolts.

    3. Attach the two clamps with the hand knobs to the stage 7 turbine disk.

12. SUBTASK 72-00-50-020-150 Remove the TEC and the Guide Pogo Stick

    1. Refer to Figure.

    2. Put the IAE 1F10075 Support pedestal 1 off below the guide pogo stick near the rear flange of the LP turbine case. Refer to Step.

    3. Remove the support pedestal B from the rear end of the guide pogo stick.

    4. Remove the TEC from the guide pogo stick. Install the TEC on the IAE 1F10178 Storage and Turnover adapter 1 off.

    5. Remove the support pedestal A.

    6. Release and remove the guide pogo stick from the LP turbine shaft. Use an applicable webbing sling.

    7. Remove the two cables sling from the balance scale.

    8. Remove the balance scale from the hoist equipment.

13. SUBTASK 72-00-50-020-151 Remove the No. 5 Bearing Inner Race and the Carbon Seal (Pre SBE 72-0142 and SBE 72-0142)

    1. Refer to Figure.

    2. SBE 72-0142: Provide a new carbon seal for the No.5 bearing compartment.

    3. Make sure that the rear lock nut is removed. Install the IAE 1F10035 Hydraulic Removal puller 1 off to the rear face of the LP turbine shaft. Engage the jaws of the puller with the grooves of the carbon seal.

    4. Connect the IAE 1F10026 Hydraulic hand pump 1 off to the coupler of the puller.

    5. Operate the hydraulic pump until the No. 5 bearing inner race and the carbon seal are free of the LP turbine shaft.

    6. Disconnect the hydraulic pump from the puller.

    7. Pre SBE 72-0142: Release the jaws of the puller and remove the No. 5 bearing inner race and the carbon seal. Refer to Figure.

    8. SBE 72-0142: Release the jaws of the puller and remove the No. 5 bearing inner race and the carbon seal. Refer to Figure.

Figure: Pre SBE 72-0173: Remove the No.5 Bearing Compartment Cover

Pre SBE 72-0173: Remove the No.5 Bearing Compartment Cover



Figure: SBE 72-0173: Remove the No.5 Bearing Compartment Cover

SBE 72-0173: Remove the No.5 Bearing Compartment Cover



Figure: Remove the Blind Cap

Remove the Blind Cap



Figure: Remove the Turbine Shaft Rear Lock Nut

Remove the Turbine Shaft Rear Lock Nut



Figure: Disconnect the Oil Feed Tube of the No.5 Bearing

Disconnect the Oil Feed Tube of the No.5 Bearing



Figure: Remove the Oil Jet and Filter of the No.5 Bearing

Remove the Oil Jet and Filter of the No.5 Bearing



Figure: Install the Guide Pogo Stick

Install the Guide Pogo Stick



Figure: Install the Remove/Installation Fixture on the Guide Pogo Stick

Install the Remove/Installation Fixture on the Guide Pogo Stick



Figure: Install the Removal/Installation Fixture on the Guide Pogo Stick

Install the Removal/Installation Fixture on the Guide Pogo Stick



Figure: Remove the TEC with the Remove/Installation Fixture

Remove the TEC with the Remove/Installation Fixture



Figure: Install the Supporting Fixture to the LP Turbine Case and Rotor

Install the Supporting Fixture to the LP Turbine Case and Rotor



Figure: Pre SBE 72-0142: Remove the No.5 Bearing Inner Race and the Carbon Seal

Pre SBE 72-0142: Remove the No.5 Bearing Inner Race and the Carbon Seal



Figure: SBE 72-0142: Remove the No.5 Bearing Inner Race and the Carbon Seal

SBE 72-0142: Remove the No.5 Bearing Inner Race and the Carbon Seal