Preliminary Requirements

Procedure

1. SUBTASK 72-42-10-220-055 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2065

   1. Refer to Figure.

   2. Reference the clearance at location 2065. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-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 2065
      Side Clearance No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-010), Thickness
      No. 4 Bearing Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060), Groove Width
      Seal Ring Thickness	0.0615	Clear
      	0.0625	0.0015
      Groove Width	0.064	0.0045
      	0.066	Clear

      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 2065
      Side Clearance No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-010), Thickness
      No. 4 Bearing Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060), Groove Width
      Seal Ring Thickness	1.563	Clear
      	1.587	0.039
      Groove Width	1.626	0.114
      	1.676	Clear

2. SUBTASK 72-42-10-220-056 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2066

   1. Refer to Figure

   2. Reference the clearance at location 2066. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000) and V2500-D5-72-42-1100-00A-307A-C (INSPECTION-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 2066
      No. 4 Bearing Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060), Location Diameter
      Diffuser Case Assembly Diffuser Case (72-42-11, 01-010), Location Diameter
      Seal Ring Holder Diameter	0.7415	Clear
      	0.7455	0.0005
      Diffuser Case Diameter	0.746	0.0085
      	0.750	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 2066
      No. 4 Bearing Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060) Location Diameter
      Diffuser Case Assembly Diffuser Case (72-42-11, 01-010), Location Diameter
      Seal Ring Holder Diameter	18.835	Clear
      	18.935	0.013
      Diffuser Case Diameter	18.949	0.216
      	19.050	Clear

3. SUBTASK 72-42-10-220-057 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2067

   1. Refer to Figure.

   2. Reference the clearance at location 2067. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000) and V2500-D5-72-42-1100-00A-307A-C (INSPECTION-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 2067
      Gap No. 4 Bearing Metal Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-010), Gap At 0.746 Inch Gage
      Diffuser Case Assembly Diffuser Case (72-42-11, 01-010), Location Diameter
      Gap	0.005	Clear
      	0.015	0.005
      Case Location Diameter	0.746	0.028
      	0.750	Clear

      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 2067
      Gap No. 4 Bearing Metal Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-010), Gap At 18.949 Millimeters Gage
      Diffuser Case Assembly Diffuser Case (72-42-11, 01-010), Location Diameter
      Gap	0.13	Clear
      	0.38	0.13
      Case Location Diameter	18.949	0.71
      	19.050	Clear

4. SUBTASK 72-42-10-220-058 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2070 (Pre SBE 72-0166)

   1. Refer to Figure

   2. Reference the clearance at location 2070. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-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 2070
      Side Clearance No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 04-001),
      No. 4 Bearing Cooling Duct Sensing Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 04-040), Groove Width
      Ring Thickness	0.0615	Clear
      	0.0625	0.002
      Groove Width	0.0645	0.005
      	0.0665	Clear

      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 2070
      Side Clearance No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 04-001),
      No. 4 Bearing Cooling Duct Sensing Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 04-040), Groove Width
      Ring Thickness	1.563	Clear
      	1.587	0.051
      Groove Width	1.639	0.127
      	1.689	Clear

5. SUBTASK 72-42-10-220-059 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2071 (Pre SBE 72-0166)

   1. Refer to Figure.

   2. Reference the clearance at location 2071. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-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 2071
      No. 4 Bearing Cooling Duct Sensing Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 04-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 04-160), Location Diameter
      Tube Location Diameter	0.6190	Clear
      	0.6225	0.0225
      Sleeve Location Diameter	0.645	0.030
      	0.649	Clear

      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 2071
      No. 4 Bearing Cooling Duct Sensing Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 04-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 04-160), Location Diameter
      Tube Location Diameter	15.723	Clear
      	15.811	0.572
      Sleeve Location Diameter	16.383	0.762
      	16.484	Clear

6. SUBTASK 72-42-10-220-060 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2072 (Pre SBE 72-0166)

   1. Refer to Figure.

   2. Reference the clearance at location 2072. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

      Table 11. 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 2072
      Gap No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 04-001), Gap At 0.645 Inch Gage
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 04-160), Inner Diameter
      Gap	0.005	Clear
      	0.015	0.005
      Sleeve Inner Diameter	0.645	0.028
      	0.649	Clear

      Table 12. 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 2072
      Gap No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 04-001), Gap At 16.383 Millimeters Gage
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 04-160), Inner Diameter
      Gap	0.13	Clear
      	0.38	0.13
      Sleeve Inner Diameter	16.383	0.71
      	16.484	Clear

7. SUBTASK 72-42-10-220-061 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2073

   1. Refer to Figure.

   2. Reference the clearance at location 2073. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

      Table 13. 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 2073
      Side Clearance No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 03-001), Thickness
      No. 4 Bearing Weep Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Groove Width
      Ring Thickness	0.0615	Clear
      	0.0625	0.002
      Groove Width	0.0645	0.005
      	0.0665	Clear

      Table 14. 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 2073
      Side Clearance No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 03-001), Thickness
      No. 4 Bearing Airframe Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Groove Width
      Ring Thickness	1.563	Clear
      	1.587	0.051
      Groove Width	1.639	0.127
      	1.689	Clear

8. SUBTASK 72-42-10-220-062 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2074

   Pre SB 72-0168

   1. Refer to Figure.

   2. Reference the clearance at location 2074. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

      Table 15. 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 2074
      No. 4 Bearing Weep Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Location Diameter
      Tube Diameter	0.6190	Clear
      	0.6225	0.0225
      Sleeve Diameter	0.645	0.030
      	0.649	Clear

      Table 16. 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 2074
      No. 4 Bearing Weep Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Location Diameter
      Tube Diameter	15.723	Clear
      	15.811	0.572
      Sleeve Diameter	16.383	0.762
      	16.484	Clear

9. SUBTASK 72-42-10-220-067 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2074

   SB 72-0168

   1. Refer to Figure.

   2. Reference the clearance at location 2074. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

      Table 17. 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 2074
      No. 4 Bearing Weep Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Location Diameter
      Tube Diameter	0.639	Clear
      	0.641	0.004
      Sleeve Diameter	0.645	0.010
      	0.649	Clear

      Table 18. 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 2074
      No. 4 Bearing Weep Tube Assembly No. 4 Bearing Compartment Tubes (72-42-20, 03-040), Location Diameter
      Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Location Diameter
      Tube Diameter	16.231	Clear
      	16.281	0.102
      Sleeve Diameter	16.383	0.254
      	16.485	Clear

10. SUBTASK 72-42-10-220-063 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2075

    1. Refer to Figure.

    2. Reference the clearance at location 2075. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

       Table 19. 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 2075
       Gap No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 03-001), Gap At 0.645 Inch Gage
       Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Inside Diameter
       Gap	0.005	Clear
       	0.015	0.005
       Sleeve Inside Diameter	0.645	0.028
       	0.649	Clear

       Table 20. 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 2075
       Gap No. 4 Bearing Seal Ring No. 4 Bearing Compartment Tubes (72-42-20, 03-001), Gap At 16.383 Millimeters Gage
       Sealing Sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140), Inside Diameter
       Gap	0.13	Clear
       	0.38	0.13
       Sleeve Inside Diameter	16.383	0.71
       	16.484	Clear

11. SUBTASK 72-42-10-220-064 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2079

    1. Refer to Figure.

    2. Reference the clearance at location 2079. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

       Table 21. 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 2079
       Side Clearance No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-020), Thickness
       Oil Pressure Tube Connector ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-120), Groove Width
       Seal Ring Thickness	0.0615	Clear
       	0.0625	0.002
       Groove Width	0.0645	0.005
       	0.0665	Clear

       Table 22. 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 2079
       Side Clearance No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-020), Thickness
       Oil Pressure Tube Connector ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-120), Groove Width
       Seal Ring Thickness	1.563	Clear
       	1.587	0.051
       Groove Width	1.639	0.127
       	1.689	Clear

12. SUBTASK 72-42-10-220-065 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2080

    1. Refer to Figure

    2. Reference the clearance at location 2080. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

       Table 23. 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 2080
       No. 4 Bearing Oil Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060), Connector Location Diameter
       Sealing Sleeve ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-280), Location Diameter
       Connector Location Diameter	0.639	Clear
       	0.641	0.004
       Sleeve Location Diameter	0.645	0.010
       	0.649	Clear

       Table 24. 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 2080
       No. 4 Bearing Oil Pressure Tube Assembly ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060), Connector Location Diameter
       Sealing SleeveENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-280), Location Diameter
       Connector Location Diameter	16.231	Clear
       	16.281	0.102
       Sleeve Location Diameter	16.383	0.254
       	16.484	Clear

13. SUBTASK 72-42-10-220-066 Reference the Fits and Clearances of the Diffuser Case Assembly at Location 2081

    1. Refer to Figure.

    2. Reference the clearance at location 2081. If required, use the data written as a note in TASK 72-42-20-200-000 (INSPECTION-000).

       Table 25. 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 2081
       Gap No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-020), Gap At 0.645 Inch Gage
       Sleeve ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-280), Inside Diameter
       Gap	0.005	Clear
       	0.015	0.005
       Sleeve Inside Diameter	0.645	0.028
       	0.649	Clear

       Table 26. 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 2081
       Gap No. 4 Bearing Seal Ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-020), Gap At 16.383 Millimeters Gage
       Sleeve ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-280), Inside Diameter
       Gap	0.13	Clear
       	0.38	0.13
       Sleeve Inside Diameter	16.383	0.71
       	16.484	Clear

14. SUBTASK 72-42-10-440-051 Put the Diffuser Case Assembly in to the Build Stand

    1. Refer to Figure

    2. Attach a hoist to the IAE 1P16173 Lift sling 1 off.

    3. Attach the lift sling to the rear outer flange of the diffuser case assembly and lift the diffuser case assembly.

    4. Attach the IAE 1P16004 Handling bracket 2 off to the front flange of the diffuser case assembly 180 degrees apart with the five screws from the rear of the diffuser case front flange.

    5. Position the diffuser case assembly in the IAE 1P16005 Build stand 1 off.

    6. Attach the handling brackets to the build stand with the eight work bolts.

    7. Disconnect the lift sling from the diffuser case and move the sling away from the diffuser case assembly.

    8. 

       CAUTION

       TWO PERSONS ARE REQUIRED TO TURN THE DIFFUSER CASE ASSEMBLY IN THE BUILD STAND.

       Turn the diffuser case assembly so the front flange is up.

15. SUBTASK 72-42-10-440-052 Install the No. 4 Bearing Weep Tube Seal Rings

    1. Refer to Figure.

    2. Install two new seal rings No. 4 Bearing Compartment Tubes (72-42-20, 03-001) in to the outer end of the No. 4 bearing weep tube No. 4 Bearing Compartment Tubes (72-42-20, 03-040).

    3. Install No. 4 Bearing Compartment Tubes (72-42-20, 03-020) gasket 1 off on the pad in the ID of the diffuser case for the No. 4 bearing outer airframe tube.

    4. Install the No. 4 bearing weep tube No. 4 Bearing Compartment Tubes (72-42-20, 03-040) from the ID of the diffuser case.

       NOTE

       Gasket can be installed with the compressor feature in any direction.

    5. Install No. 4 Bearing Compartment Tubes (72-42-20, 03-120) gasket 1 off to the pad on the outer surface of the diffuser case over the outer weep tube.

    6. Install the sealing sleeve No. 4 Bearing Compartment Tubes (72-42-20, 03-140) over the tube and against the gasket.

    7. Install the retaining plate No. 4 Bearing Compartment Tubes (72-42-20, 03-160) over the tube and against the sealing sleeve.

    8. Install the three bolts No. 4 Bearing Compartment Tubes (72-42-20, 03-180) to hold the gasket, the sleeve and the plate in position. Do not torque the bolts.

    9. Install the coupling nut No. 4 Bearing Compartment Tubes (72-42-20, 03-200) to the outer end of the weep tube and lock in place with No. 4 Bearing Compartment Tubes (72-42-20, 03-220) thrust wire 1 off.

16. SUBTASK 72-42-10-440-053-A00 Install the Turbine Cooling Air Duct Sensing Tube (Pre SBE 72-0166)

    1. Refer to Figure

    2. Install two new seal rings No. 4 Bearing Compartment Tubes (72-42-20, 04-001) in to the outer end of the turbine cooling air duct sensing tube No. 4 Bearing Compartment Tubes (72-42-20, 04-040).

       NOTE

       Gasket can be installed with the compression feature in either direction.

    3. Install No. 4 Bearing Compartment Tubes (72-42-20, 04-020) gasket 1 off on to the diffuser case ID mounting pad.

    4. Install the outer sensing tube No. 4 Bearing Compartment Tubes (72-42-20, 04-040) from the inside of the diffuser case.

    5. Attach the outer sensing tube to the diffuser case inner boss with the two bolts No. 4 Bearing Compartment Tubes (72-42-20, 04-060). Do not torque the bolts.

    6. Install No. 4 Bearing Compartment Tubes (72-42-20, 04-140) gasket 1 off to the pad on the outer surface of the diffuser case over the outer sensing tube.

    7. Install the sealing sleeve No. 4 Bearing Compartment Tubes (72-42-20, 04-160) over the tube and against the gasket.

    8. Install the retaining plate No. 4 Bearing Compartment Tubes (72-42-20, 04-180) over the tube and against the sealing sleeve.

    9. Install the three bolts No. 4 Bearing Compartment Tubes (72-42-20, 04-200) to hold the gasket, the sleeve and the plate in position. Do not torque the bolts.

    10. Install the coupling nut No. 4 Bearing Compartment Tubes (72-42-20, 04-220) to the outer end of the sensing tube and lock in place with No. 4 Bearing Compartment Tubes (72-42-20, 04-240) thrust wire 1 off.

    11. Install the tube union No. 4 Bearing Compartment Tubes (72-42-20, 04-320) to the coupling nut.

    12. Torque the tube union to 195 lbfin to 212 lbfin (22.00 Nm to 24.00 Nm).

    13. Install the nut assembly No. 4 Bearing Compartment Tubes (72-42-20, 04-340) to the tube union.

    14. Torque the nut assembly to 159 lbfin to 177 lbfin (18.00 Nm to 20.00 Nm). Hold the tube union with a wrench, so it will not turn.

    15. Safety the nut assembly with CoMat 02-141 LOCKWIRE.

17. SUBTASK 72-42-10-440-053-B00 Install the Sensing Tube Covers (SBE 72-0166)

    1. Refer to Figure.

    2. SBE 72-0166: (Part 1) Remove the turbine cooling air duct sensing tubes.

    3. Apply CoMat 10-077 APPROVED ENGINE OILS to the threads of the bolts No. 4 Bearing Compartment Tubes (72-42-20, 04-060) and No. 4 Bearing Compartment Tubes (72-42-20, 04-200).

       NOTE

       The gasket can be installed with the compression feature in either direction.

    4. Install the No. 4 Bearing Compartment Tubes (72-42-20, 04-020) gasket 1 off on the boss in the diffuser case inner diameter.

    5. Install the No. 4 Bearing Compartment Tubes (72-42-20, 04-260) inner cover 1 off onto the diffuser case boss.

    6. Attach the inner cover No. 4 Bearing Compartment Tubes (72-42-20, 04-260) to the diffuser case inner boss with the two bolts No. 4 Bearing Compartment Tubes (72-42-20, 04-060).

    7. Torque the bolts to 65 lbfin to 85 lbfin (7.344 Nm to 9.604 Nm).

    8. Safety the bolts with CoMat 02-141 LOCKWIRE.

       NOTE

       The gasket can be installed with the compression feature in either direction.

    9. Install the No. 4 Bearing Compartment Tubes (72-42-20, 04-140) gasket 1 off on the boss in the diffuser case outer diameter.

    10. Install the No. 4 Bearing Compartment Tubes (72-42-20, 04-040) outer cover 1 off onto the diffuser case boss.

    11. Attach the outer cover No. 4 Bearing Compartment Tubes (72-42-20, 04-040) to the diffuser case outer boss with the three bolts No. 4 Bearing Compartment Tubes (72-42-20, 04-200).

    12. Torque the bolts to 65 lbfin to 85 lbfin (7.344 Nm to 9.604 Nm).

    13. Safety the bolts with CoMat 02-141 LOCKWIRE.

18. SUBTASK 72-42-10-440-061 Install the No. 4 Bearing Pressure Tube

    1. Refer to Figure.

    2. Install the new seal ring ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-010) to the No. 4 bearing pressure tube ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060).

    3. Install the two seal rings ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-030) to the outer end of the No. 4 bearing pressure tube.

    4. Install the No. 4 bearing pressure tube ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-060) from the inside of the diffuser case.

       NOTE

       Gasket can be installed with the compression feature in either direction.

    5. Install ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-260) gasket 1 off to the pad on the outer surface of the diffuser case over the No. 4 bearing pressure tube.

    6. Install the sealing sleeve ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-280) over the tube and against the gasket.

    7. Install the retaining plate ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-300) over the tube and against the sealing sleeve.

    8. Install the three bolts ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-320) to hold the gasket, the sleeve and the plate in position. Do not torque the bolts.

    9. Install the coupling nut ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-420) to the outer end of the pressure tube and lock in place with ENGINE-NO.4 BEARING COMPARTMENT TUBES (72-42-20, 01-440) thrust wire 1 off.

19. SUBTASK 72-42-10-440-063 Remove the Diffuser Case Assembly from the Build Stand

    1. Refer to Figure.

    2. Attach a hoist to the IAE 1P16173 Lift sling 1 off.

    3. Attach the sling to the front flange of the diffuser case assembly at equally spaced locations.

    4. Remove the 10 bolts that attach the IAE 1P16004 Handling bracket 2 off to the diffuser case assembly.

    5. Remove the diffuser case assembly from the build stand using the sling and hoist.

    6. Put the diffuser case assembly on a pallet.

    7. Remove the sling and the hoist.

Figure: Diffuser Case Assembly - Fits and Clearances

Sheet 1



Legend

Diffuser Case Assembly - Fits and Clearances

Sheet 1

Close

Figure: Diffuser Case Assembly - Fits and Clearances

Sheet 2



Legend

Diffuser Case Assembly - Fits and Clearances

Sheet 2

Close

Figure: Diffuser Case Assembly - Fits and Clearances

Sheet 3



Legend

Diffuser Case Assembly - Fits and Clearances

Sheet 3

Close

Figure: Pre SBE 72-0166: Diffuser Case Assembly - Fits and Clearances

Sheet 4



Legend

Pre SBE 72-0166: Diffuser Case Assembly - Fits and Clearances

Sheet 4

Close

Figure: Diffuser Case Assembly - Fits and Clearances

Sheet 5



Legend

Diffuser Case Assembly - Fits and Clearances

Sheet 5

Close

Figure: Install/Remove the Diffuser Case Assembly to/from the Build Stand

Install/Remove the Diffuser Case Assembly to/from the Build Stand



Figure: Install the No. 4 Bearing Weep Tube

Install the No. 4 Bearing Weep Tube



Figure: Pre SBE 72-0166: Install the Turbine Cooling Air Duct Sensing Tube

Pre SBE 72-0166: Install the Turbine Cooling Air Duct Sensing Tube



Figure: SBE 72-0166 Part 1: Install the Sensing Tube Covers

SBE 72-0166 Part 1: Install the Sensing Tube Covers



Figure: Install the No. 4 Baring Pressure Tube

Install the No. 4 Baring Pressure Tube