TASK 72-60-41-300-015 Angle Gearbox Casing - Repair The PTO Shaft Seal Tube Bore By Bushing, Repair-015 (VRS5690)

DMC:V2500-A0-72-60-4101-01A-664A-C|Issue No:006.00|Issue Date:2021-05-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-60-41-300-015 Angle Gearbox Casing - Repair The PTO Shaft Seal Tube Bore By Bushing, Repair-015 (VRS5690)

Effectivity

FIG/ITEM PART NO.

01-300

4B0256

01-300

4B0354

Material of Component

DESCRIPTION

IAE SYMBOL

MATERIAL

Accessory gearbox casing

A357-T61 (4716 M/2)

Aluminium alloy

Bushing

A357-T61 (4716 M/2) or AMS 4120 (type 2024 T4/T351)

Aluminium alloy, beryllium free

General

Price and availability - none

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 08-163 RETAINING COMPOUND PRESSFITLOCALCoMat 08-163
CoMat 10-140 DRY FILM LUBRICANT, MOLYBDENUM DISULFIDE818N1CoMat 10-140

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-41-320-078 Machine the Gearbox Casing Bore

    1. Refer to Figure and Figure.

      2. Machine the two diameters of the bore.

      1. Machine Diameter U first.

        2. Diameter U must be between 3.658 in. and 3.665 in. (92.90 mm and 93.10 mm).

        1. If there is damage or unwanted runout, Diameter U can be increased to a maximum of 3.693 in. (93.80 mm). Keep material removal to a minimum.

      3. Axially machine the Diameter U between 0.650 in. and 0.669 in. (16.50 mm and 17.00 mm).

        4. Diameter V must be between 3.815 in. and 3.822 in. (96.90 mm and 97.10 mm).

        1. If there is damage or unwanted runout, Diameter V can be increased to a maximum of 3.829 in. (97.26 mm). Keep material removal to a minimum.

        5. Axially machine the Diameter V between 0.153 in. and 0.161 in. (3.90 mm and 4.10 mm).

        1. If there is damage, the axial length of Diameter V (Distance D) can be increased to a maximum of 0.234 in. (5.94 mm).

      6. Make sure that you obey the tolerance limits.

      7. Record the actual dimensions of Diameter U, Diameter V, and Distance D.

      8. Use a boring machine.

    2. SUBTASK 72-60-41-220-104 Examine the Gearbox Casing Bore

      1. Clean the part.

      2. Examine the casing for cracks in the area of the bore.

      1. Refer to SPM TASK 70-23-05-230-501. Use medium sensitivity.

      2. Cracks are not permitted.

    3. SUBTASK 72-60-41-330-080 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the Diameter V and the Surface S.

      1. Refer to SPM TASK 70-38-02-300-503.

    4. SUBTASK 72-60-41-330-081 Make a Bushing

    1. Refer to Figure and Figure.

      2. Make a bushing.

      1. Use the specified aluminium alloys.

      2. Do not use other materials.

      3. The outside diameters must be equal to U plus 0.0032 in. to 0.0039 in. (0.08 mm to 0.10 mm) and to V minus 0.008 in. to 0.0016 in. (0.02 mm to 0.04 mm).

      4. Make sure that you obey the tolerance limits.

      5. Deleted.

      3. Apply the chromate conversion coating to the machined surfaces. Do not coat the Surface E and the grooves.

      1. Refer to SPM TASK 70-38-02-300-503.

    5. SUBTASK 72-60-41-350-089 Install the Bushing

      WARNING

      DO NOT TOUCH THE HOT PARTS WITHOUT PROTECTIVE GLOVES. HOT PARTS CAN CAUSE REDDENING AND BLISTERING OF THE SKIN IF THE HANDS ARE NOT PROTECTED. PUT THE CONTACTED AREA IN COLD WATER FOR 10 MINUTES IF THE SKIN IS BURNED. IF THE PAIN OR BLISTERING CONTINUE, GET THE MEDICAL ATTENTION IMMEDIATELY.

    1. Refer to Figure.

      2. Increase the temperature of the casing.

      1. Use an oven.

      2. Do not increase the temperature of the casing more than 220 deg F (104 deg C).

        NOTE

        The minimum difference in temperature between the parts must be 140 deg F (60 deg C).

      3. Remove the casing from the oven.

      1. Use protective gloves.

      4. Apply the glue in the grooves of the bushing and on Surface E.

      5. CAUTION

        INSTALL THE BUSHING INTO THE MACHINED BORE OF THE CASING IMMEDIATELY AFTER REMOVAL OF CASING FROM OVEN. IF YOU DO NOT OBEY, THE BUSHING CANNOT BE INSTALLED CORRECTLY.

        Install the bushing into the casing.

      1. Install the bushing into the machined bore of the casing.

      2. Use an arbor press.

      3. Make sure that the casing is correctly installed on a support to prevent casing distortion when you install the bushing.

      6. Let the parts get to room temperature.

      1. Let the parts get to the room temperature for a minimum of 48 hours to make sure sufficient cure time is given for glue.

    6. SUBTASK 72-60-41-320-079 Machine the Bushing

    1. Refer to Figure and Figure.

      2. Machine the top land and the inner diameter of the bushing.

      1. The top land of the bushing must be flush with the casing.

      2. Deleted.

      3. The final dimension of the inner diameter of the bushing must be between 3.5039 in. and 3.5053 in (89.000 mm and 89.035 mm).

      4. Make sure that you obey the tolerance limits.

      5. Surface finish is 63 microinches (1.6 micrometers).

      6. Use a boring machine.

      3. Machine the chamfer of the bushing.

      1. Surface finish is 63 microinches (1.6 micrometers).

      2. Deleted.

    7. SUBTASK 72-60-41-330-082 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined surfaces of the bushing and the housing.

      1. Refer to SPM TASK 70-38-02-300-503.

    8. SUBTASK 72-60-41-340-001 Apply the Dry Film Lubricant

      1. Apply the dry film lubricant to the bushing and the housing.

      1. Refer to SPM TASK 70-38-03-380-501.

    9. SUBTASK 72-60-41-350-090 Identify the Repair

      1. If necessary make a mark VRS5690 adjacent to the part number.

      1. Refer to SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

    10. Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

    Repair Details And Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added procedural steps, revised procedural step, and figure. (19VF839)

Change Type:

Revised consumables table and deleted procedural steps. (19VF825)

Manufacturer Code:818N1
Enterprise Name:DUPONT DE NEMOURS INC
BU Name:DUPONT DE NEMOURS INC
Street:974 CENTRE RD
City:WILMINGTON
State:DE
Zip Code:19805
Country:UNITED STATES OF AMERICA
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 08-163
Type:sp01
Supply Short Name:CoMat 08-163 RETAINING COMPOUND PRESS FIT
Supply Name:CoMat 08-163 RETAINING COMPOUND PRESSFIT
Specification Groups:
Doc NumberType
JCR-321LOCTITE 648
OMAT: 8/77ALOCTITE 648
Suppliers:
ManufacturerRemarks
LOCAL
IE259
05972
IE200
IE261
IE379
IE380
K3504
K6835
U0406
Manufacturer Code:818N1
Supply Number:CoMat 10-140
Type:sp01
Supply Short Name:CoMat 10-140 DRY FILM LUBRICANT, MOLYBDENUM DISULFIDE
Supply Name:CoMat 10-140 DRY FILM LUBRICANT, MOLYBDENUM DISULFIDE
Specification Groups:
Doc NumberType
orMOLYKOTE D-321 R
MOLYKOTE D-321 R (bulk liquid)
Suppliers:
ManufacturerRemarks
818N1