Preliminary Requirements

Procedure

1. SUBTASK 72-50-30-220-054-A00 V2500-A1: Make sure that the Fits and Clearances between the Stage 6 Disk and Stage 6 Air Seal are in the Limits given at Location 3358 (Pre SBE 72-0138)

   1. Refer to Figure.

   2. Calculate the clearance at location 3358.

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3358 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	20.4921 20.4882	Intf 0.0157		Intf 0.0177
      Air seal dia	20.4803 20.4764	0.0079		0.0020

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3358 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	520.5 520.4	Intf 0.4		Intf 0.45
      Air seal dia	520.2 520.1	0.2		0.05

2. SUBTASK 72-50-30-220-054-B00 V2500-A1: Make sure that the Fits and Clearances between the Stage 6 Disk and Stage 6 Air Seal are in the Limits given at Location 3658 (SBE 72-0138)

   1. Refer to Figure.

   2. SBE 72-0138: Rotor and stator assembly introduce new LP turbine blades and vanes.

   3. Calculate the clearance at location 3658.

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3658 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	20.4921 20.4882	Intf 0.0157		Intf 0.0177
      Air seal dia	20.4803 20.4764	0.0079		0.0020

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3658 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	520.5 520.4	Intf 0.4		Intf 0.45
      Air seal dia	520.2 520.1	0.2		0.05

3. SUBTASK 72-50-30-220-054-C00 V2500-A5: Make sure that the Fits and Clearances between the Stage 6 Disk and Stage 6 Air Seal are in the Limits given at Location 3758

   1. Refer to Figure.

   2. Calculate the clearance at location 3758.

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3758 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	20.4921 20.4882	Intf 0.0157		Intf 0.0177
      Air seal dia	20.4803 20.4764	0.0079		0.0020

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

      	NEW PART DIMENSIONS		WORN PART DIMENSIONS	REJECT IF
      PART IDENT	Size	Clearance	(Non-select)	MORE THAN
      LOCATION 3758 Stage 6 air seal LPT Stage 3, 4, 5, 6, 7 Rotating Air Seals (72-50-33,01-050) abutment diameter to stage 6 turbine disk LPT Stage 3, 4, 5, 6, 7 Disks (72-50-31,01-050)
      Disk dia	520.5 520.4	Intf 0.4		Intf 0.45
      Air seal dia	520.2 520.1	0.2		0.05

4. SUBTASK 72-50-30-440-081 Calibrate the Moment Weight Equipment

   NOTE

   To get constantly correct results during the moment weight of the LP turbine blades obey the following procedures Step to Step.

   1. Refer to Figure.

   2. Protect the moment weight equipment for environmental effect.

   3. Install the moment weight equipment on a surface plate which is free from vibrations.

   4. Do not change the adjustment of the hydraulic stabilizer at the moment weight equipment.

   5. Make sure that during the moment weight of the blades no tension or load will be applied to the moment weight equipment.

   6. Balance the moment weight equipment with the adjusting screw and the spirit level.

   7. Install the blade distribution system to the moment weight equipment.

   8. Install the IAE 1M14019 Mounting adapter 1 off with the four screws on to the mounting flange of the moment weight equipment.

   9. Install the IAE 1M14018 Blade holder 1 off with the four screws on to the mounting adapter.

   10. Put the required weights from the weight set on to the counter weight scale. Set the moment weight equipment in accordance with the manufacturers instructions to zero. For fine adjustment use the movable weight at the moment weight equipment.

5. SUBTASK 72-50-30-440-082 Weigh the Stage 6 Turbine Blades

   1. Refer to Figure.

   2. Before you weigh the stage 6 turbine blades, examine if a unbalance value is engraved on the stage 6 turbine disk. Refer to Figure. If there is a unbalanced value engraved on the disk, use this value on the disk for technical data to blade distribution in Step.

   3. Turn on the installed blade distribution system.

   4. Use the blade distribution diskette and put it in to the computer.

   5. Make the input for all required technical data to do blade distribution in accordance with the computer manual in to the blade distribution system.

   6. Put 9.523 oz (270 g) weight from the weight set on the counter weight scale.

   7. Identify the stage 6 turbine blades with number one to 85. Use CoMat 02-129 MARKER.

   8. Install the stage 6 turbine blade with number one on to the blade holder.

   9. After the blade distribution system has read the moment weight of the blade, remove the blade from the blade holder. Put the blade in to a storage box.

   10. Repeat Step and Step until all the stage 6 turbine blade moment weights are specified.

   11. Operate the blade distribution system to get a blade distribution protocol for the stage 6 turbine blades.

   12. Remove the weights from the counter weight scale.

   13. Remove the blade holder from the mounting adapter.

6. SUBTASK 72-50-30-440-083 Install the Stage 6 Turbine Blades to the Stage 6 Turbine Disk

   1. Refer to Figure.

   2. NOTE

      Make sure that you use the correct locating ring of the IAE 1M14153 Assy/disassy stand 1 off for the stage 6 disk.

      Identify the disk slot with the disk serial number. The serial number is vibro-engraved on the rear face of the disk. The groove number one is the first groove on the right side of the serial number. Make a mark to the groove number one at the front side. Use CoMat 02-129 MARKER.

   3. NOTE

      The turbine blade identification number is the same as the blade identification number at the blade distribution protocol.

      Put the stage 6 turbine disk on the IAE 1M14153 Assy/disassy stand 1 off, turbine disk front flange upwards.

   4. Insert the first stage 6 turbine blade in accordance with the blade distribution protocol in to the groove number one.

   5. Insert the remaining turbine blades in accordance with the blade distribution protocol. Work in a counterclockwise direction look to the front side of the disk and insert the blades helical in to the grooves.

   6. Lightly hit the blades at the blade roots. Operate stepwise and in counter clockwise direction to engage the blades. Move stepwise the support of the assy/disassy stand upwards. Use the IAE 1M14079 Plastic wedge 1 off and a soft headed mallet.

   7. Repeat Step. until all the blades are fully engaged in to the grooves of the disk. Make sure that the hook from each turbine blade root is in contact with the turbine disk front face.

   8. Inspect the gap at the stage 6 turbine blade inner platforms. Use a torch light. If you can not see a gap, use a feeler gage to measure the correct gap (minimum thickness 0.00118 in. (0.03 mm)).

   9. Remove the quick acting knob and the bar.

7. SUBTASK 72-50-30-440-084 Install the Clamping Ring on to the Stage 6 Turbine Disk

   1. Refer to Figure.

   2. Install the two halves of the IAE 1M14155 Clamping ring 1 off to the stage 6 turbine disk.

   3. Connect the two halves with the single acting ball lock pin.

   4. Attach the clamping ring with the hand knob.

   5. Tighten the hand knob.

8. SUBTASK 72-50-30-440-085 Install the Stage 6 Turbine Disk on to the Balancing Machine

   1. Refer to Figure.

   2. Make sure that the set screw, part of IAE 1M14027 Balancing fixture disk 1 off, is correctly adjusted.

      1. Use hoist equipment. Lower the balancing fixture on a work bench. Remove hoist equipment.

      2. Measure Dimension A on the IAE 1M14021 Balancing fixture sleeve 1 off.

      3. Measure Dimension B from the balancing fixture to the set screw, part of the balancing fixture. Dimension B must be equal to Dimension A plus set Dimension S.

      4. Adjust the set screw to achieve set Dimension S if necessary. Secure the set screw with the nut. Control the Dimension B again. Do the Step and Step.

   3. Use hoist equipment. Install the balancing fixture to the balancing machine. Align the TOP marks. Remove hoist equipment. Install the three bolts. Tighten the bolts.

   4. NOTE

      1. The balancing fixture sleeve is used to safety the LP turbine rotor assembly in radial position. This is achieved when the balancing fixture disk is pushed at the inner diameter against the balancing base plate. The caused deflection of the balancing fixture disk goes to a small diameter reduction at the abutment face to the LPT rotor disk snap diameter. Correct adjustment of the set screw part of the balancing base plate avoids overstressing.

      2. Do not tighten the balancing fixture sleeve bolt at this moment.

      Install the balancing fixture sleeve to the balancing fixture mounting disk. Turn the threaded end of the bolt, part of the balancing fixture sleeve in the bushing, part of the balancing fixture. Align the installation groove of the balancing fixture sleeve with the dowel pin of the balancing fixture disk.

   5. Move the three slide blocks of the balancing fixture in the inner position.

   6. Install the IAE 1M14156 Lifting fixture 1 off to hoist equipment.

   7. Attach the lifting fixture to the clamping ring. Lift the stage 6 turbine disk carefully above the installed balancing tool assembly. Turn the stage 6 turbine disk front flange down. Lower it carefully on to the installed balancing fixture.

   8. Align the serial number (TOP mark of the turbine disk) to the TOP mark of the balancing fixture.

   9. NOTE

      Do not apply too much force to the stage 6 turbine disk.

      Make sure that the three dowel pins of the balancing fixture disk are correctly engaged in to the turbine disk bolt holes.

   10. Tighten the bolt of the balancing fixture sleeve until the bolt front end touches the set screw.

   11. Move the three slide blocks, part of the balancing fixture in the outer position.

9. SUBTASK 72-50-30-440-086 Remove the Clamping Ring from the Stage 6 Turbine Disk

   1. Refer to Figure.

   2. Remove the lifting fixture and the hoist equipment from the clamping ring.

   3. Loosen the hand knob and disconnect the single acting ball lock pin at the clamping ring.

   4. Remove the two halves of the clamping ring from the stage 6 turbine disk.

10. SUBTASK 72-50-30-440-087 Balance the Stage 6 Turbine Disk and Blades

    1. Make sure that all tools are correctly installed on to the balancing machine.

    2. Adjust the balance radius for the stage 6 turbine disk 13.90 in. (353 mm) at the balancing machine.

    3. NOTE

       The direction of the revolution on the balancing machine must be in clockwise direction.

       Do static unbalance check of the stage 6 turbine disk at 900 rpm.

    4. Install the IAE 1M14155 Clamping ring 1 off on to the stage 6 turbine disk. Refer to Step.

    5. Install the IAE 1M14156 Lifting fixture 1 off to the clamping ring. Use hoist equipment.

    6. Move the three slide blocks of the balancing fixture disk in inner position.

    7. Loosen the bolt of the balancing fixture sleeve.

    8. Make sure that the stage 6 turbine disk is free from the tool assembly.

    9. Lift the stage 6 turbine disk carefully above of the tool assembly. Lower the stage 6 turbine disk and install it 180 degrees opposite of the balance position in to the tool assembly.

    10. Remove the lifting fixture from the clamping ring. Remove the clamping ring. Refer to Step.

    11. Tighten the bolt of the balancing fixture sleeve.

    12. Move the slide blocks of the balancing fixture disk in outer position.

    13. Repeat Step.

    14. Remaining unbalance must not be more than 1.0 ozin (720 gmm). If the unbalance is within the limits, continue with Step. If not, correct the unbalance by blade selection as follows:

        1. Use CoMat 02-129 MARKER to mark the unbalance and the position on the blades.

        2. Release the stage 6 turbine disk from the balancing machine. Refer to Step through Step.

        3. Lift the stage 6 turbine disk carefully from the balancing machine and put it on the assy/disassy stand, front flange upwards.

        4. Remove the lifting fixture, the hoist equipment and the clamping ring.

        5. Lightly hit the blades at the blade roots. Operate stepwise and in clockwise direction to disengage the blades. Use the IAE 1M14079 Plastic wedge 1 off and soft headed mallet.

        6. Change the blades marked before with the blades located 180 degrees on the opposite side of the disk.

        7. Insert the changed blades in to the disk grooves. Refer to Step through Step. Write the changed blades down to the bliade distribution protocol.

        8. Install the clamping ring to the stage 6 turbine disk. Refer to Step. Remove the quick acting bolt and the bar.

        9. Install the stage 6 turbine disk to the balancing machine. Refer to Step.

        10. Remove the clamping ring. Refer to Step.

        11. Repeat Step through Step.

    15. Write the unbalance down to the stage 6 turbine disk blade distribution protocol.

11. SUBTASK 72-50-30-440-088 Remove the Stage 6 Turbine Disk from the Balancing Machine

    1. Move the slide blocks of the mounting disk in the inner position.

    2. Remove the identification numbers from the turbine blades and the mark on the disk groove number one. Use CoMat 02-069 DISPOSABLE CLEANING TISSUES or clean cloth, or clean cloth and CoMat 01-031 ACETONE (CH3)2CO.

    3. Loosen the bolt of the balancing fixture sleeve.

    4. Install the IAE 1M14155 Clamping ring 1 off to the stage 6 turbine disk. Refer to Step.

    5. Install the IAE 1M14156 Lifting fixture 1 off to the clamping ring. Use hoist equipment.

    6. Make sure that the stage 6 turbine disk is free from the tool assembly. Lift the turbine disk. Turn the turbine disk front flange in the upper position. Lower the turbine disk carefully on rack pallet.

12. SUBTASK 72-50-30-440-089 Remove the Tools from the Balancing Machine

    1. Refer to Figure.

    2. Turn off the bolt of the balancing fixture sleeve. Remove the balancing fixture sleeve from the mounting disk.

    3. Remove the three bolts which attach the balancing fixture to the balancing machine. Remove the balancing fixture.

13. SUBTASK 72-50-30-440-090 Install the Stage 6 Air Seal to the Stage 6 Turbine Disk

    1. Refer to Figure.

    2. Lift the stage 6 turbine disk above the IAE 1M14030 Assembly trolley 1 off. Use the IAE 1M14156 Lifting fixture 1 off with hoist equipment.

    3. Turn the turbine disk, front flange in the upper position. Lower the turbine disk on to the assembly trolley.

    4. Remove the lifting fixture and the hoist equipment.

    5. Remove the clamping ring from the stage 6 turbine disk. Refer to Step.

    6. Install the IAE 1M14132 Guide pin 1 off in to a bolt hole of the stage 6 turbine front flange. Safety the guide pin with the IAE 1M14049 Position retainer 1 off.

    7. Put the stage 6 air seal in to an oven.

    8. 

       CAUTION

       DO NOT EXCEED MAXIMUM TEMPERATURE OF 464 DEG F (240 DEG C) OTHERWISE TURBINE SEAL CAN BE DAMAGED.

       Increase the temperature of the seal until a differential temperature to the ambient temperature of 212 deg F (100 deg C) is reached.

    9. 

       WARNING

       USE PROTECTIVE GLOVES.

       If the stage 6 air seal has the correct temperature remove it from the oven.

    10. NOTE

        1. The high point of the parts are identified by the delta symbol in a circle.

        2. The turbine disk stage 6 and the airseal stage 6 must be assembled so that the high points of the parts are 180 degrees apart.

        Move the stage 6 air seal above the stage 6 turbine disk.

    11. Install the stage 6 air seal on to the stage 6 turbine disk.

    12. 

        CAUTION

        HOLD THE BOLTS IN THEIR POSITION WHEN YOU INSTALL THE NUTS ON TO THE BOLTS. DO NOT TURN THE BOLTS OR MAKE TO-AND-FROM MOVEMENTS. THE DISK/INNER AIR SEAL FLANGES AND/OR THE BOLTS CAN BE DAMAGED BY SCORES.

        Install six work bolts and work nuts to attach the air seal on the disk. Tighten the nuts.

    13. Remove the position retainer and the guide pin from the stage 6 turbine disk.

    14. Let the temperature of all parts decrease to room temperature. Install the IAE 1M14155 Clamping ring 1 off to the stage 6 turbine disk. Refer to Step.

    15. Use CoMat 02-129 MARKER and mark a dash in a circle on the disk hub at the caused high point location.

    16. Install the lifting fixture to the installed clamping ring. Use hoist equipment.

    17. Lift the assembled stage 6 turbine disk from the assembly trolley. Lower it on to rack pallet, air seal in the upper position.

    18. Remove the lifting fixture and the hoist equipment from the clamping ring.

    19. Remove the clamping ring. Refer to Step.

Figure: Pre SBE 72-0138 V2500-A1: The Stage 6 Turbine Disk and Stage 6 Air Seal Fits and Clearances

Sheet 1



Legend

Pre SBE 72-0138 V2500-A1: The Stage 6 Turbine Disk and Stage 6 Air Seal Fits and Clearances

Sheet 1

Close

Figure: SBE 72-0138 V2500-A1: The stage 6 Turbine Disk and Stage 6 Air Seal - Fits and Clearances

Sheet 2



Legend

SBE 72-0138 V2500-A1: The stage 6 Turbine Disk and Stage 6 Air Seal - Fits and Clearances

Sheet 2

Close

Figure: V2500-A5: The Stage 6 Turbine Disk and the Stage 6 Air Seal - Fits and Clearances

V2500-A5: The Stage 6 Turbine Disk and the Stage 6 Air Seal - Fits and Clearances



Figure: Calibrate the Moment Weight Equipment for the Stage 6 Turbine Blades

Calibrate the Moment Weight Equipment for the Stage 6 Turbine Blades



Figure: Disk-marking Areas of the Stage 6 Turbine Disk

Disk-marking Areas of the Stage 6 Turbine Disk



Figure: Install the Stage 6 Turbine Blades

Install the Stage 6 Turbine Blades



Figure: Turn the Stage 6 Turbine Disk with the Clamping Ring

Turn the Stage 6 Turbine Disk with the Clamping Ring



Figure: Install the Stage 6 Turbine Disk to the Balancing Tool Assembly

Install the Stage 6 Turbine Disk to the Balancing Tool Assembly



Figure: Install the Stage 6 Air Seal to the Stage 6 Turbine Disk

Install the Stage 6 Air Seal to the Stage 6 Turbine Disk



Figure: Install the Stage 6 Turbine Blades

Install the Stage 6 Turbine Blades