TASK 72-42-20-300-013 No. 4 Bearing Oil Pressure Tube - Nickel Plate The Outer Sealing Surface, Repair-013 (VRS3577)

DMC:V2500-A0-72-42-2001-00A-647A-C|Issue No:001.00|Issue Date:2013-11-01

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 72-42-20-300-013 No. 4 Bearing Oil Pressure Tube - Nickel Plate The Outer Sealing Surface, Repair-013 (VRS3577)

Effectivity

FIG/ITEM

PART NO.

01-060

2A2493 -01

01-060

2A0835 -01

Material of component

PART IDENT

SYMBOL

MATERIAL

No. 4 Bearing Pressure Tube

-

Stainless Steel

General

Price and Availability - Refer to IAE

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Nickel plate equipmentLOCALNickel plate equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-20-320-056 Machine No. 4 Pressure Tube Outer Surfaces

      1. Machine the outer surfaces of the inner seal holder.

      1. Remove the least amount of material. Do not go below 0.7215 inch (18.33 mm) diameter.

        Refer to Figure- View A.

    2. SUBTASK 72-42-20-330-002 Nickel Plating of Machined Surface

      1. Nickel plate machined surface up to 0.7655 inch (19.44mm) diameter.

      1. Refer to the SPM TASK 70-33-25-300-503.

        NOTE

        Plating is pemitted outside machined area but must be removed. No plating permitted in seal grooves.

    3. SUBTASK 72-42-20-320-057 Machining Outer Surfaces

      1. Finish machine outer surface of inner seal holder surfaces to 0.7455 - 0.7515 inch (18.83 - 18.94 mm) diameter.

      1. Refer to Figure- View A.

    4. SUBTASK 72-42-20-320-058 Machine Outer Seal Surfaces of Outer Connector

      1. Machine the outer seal surface of outer connector.

      1. Remove the least amount of material. Do not go below 0.619 inch (15.72 mm) diameter.

        Refer to Figure- View B.

    5. SUBTASK 72-42-20-330-003 Nickel Plating of Machined Surfaces

      1. Nickel plate machined surfaces up to 0.661 inch (16.79 mm) diameter.

      1. Refer to the SPM TASK 70-33-25-300-503.

        NOTE

        Plating is permitted outside machined area but must be removed. No plating permitted in seal grooves.

    6. SUBTASK 72-42-20-320-059 Machining Outer Connector Surfaces

      1. Finish machine outer connector surfaces to 0.639 - 0.641 inch (18.83 - 18.94 mm) diameter.

      1. Refer to Figure- View B.

    7. SUBTASK 72-42-20-320-060 Machine Seal Grooves to Accept Oversize Piston Rings

      1. Measure width of the seal ring groove of the inner seal holder at the wear locations.

      1. Refer to Figure.

        NOTE

        Wear can be uneven on groove surfaces.

      2. If wear is greater than 0.003 in (0.076 mm) grind to subsequent oversize groove width.

      1. Refer to Figure. See Table I.

      3. Oversize Seal Groove Dimensions For Inner Seal Holder.

      1. 0.069-0.071 inch (1.75-1.80 mm) for seal ring P/N 2A0333 P5.

      2. 0.074-0.076 inch (1.88-1.93 mm) for seal ring P/N 2A0333 P10.

      3. 0.079-0.081 inch (2.01-2.06 mm) for seal ring P/N 2A0333 P15.

      4. 0.084-0.086 inch (2.13-2.18 mm) for seal ring P/N 2A0333 P20.

      4. Break edge 0.003 inch (0.076 mm) maximum.

      1. Refer to Figure.

      5. 0.005 - 0.015 inch (0.013 - 0.038 mm) modified radius.

      1. Refer to Figure.

      6. Measure the width of the seal ring grooves of the outer tube connector at the wear locations.

      1. Refer to Figure.

        NOTE

        Wear can be uneven on groove surfaces.

      7. If wear is greater than 0.003 inch (0.076 mm) grind to subsequent oversize groove width.

      1. Refer to Figure. See Table II.

      8. Oversize Seal Groove Dimensions For Outer Seal Holder.

      1. 0.0695-0.0715 inch (1.765-1.816 mm) for seal ring P/N 2A0364 P5.

      2. 0.0745- 0.0765 inch (1.89-1.943 mm) for seal ring P/N 2A0364 P10.

      3. 0.0795-0.0815 inch (2.019-2.070 mm) for seal ring P/N 2A0364 P15.

      4. 0.0845-0.0865 inch (2.146-1.197 mm) for seal ring P/N 2A0364 P20.

      9. Break edge 0.003 inch (0.076 mm) maximum.

      1. Refer to Figure.

      10. 0.005 - 0.015 inch (0.013 - 0.038 mm) modified radius.

      1. Refer to Figure.

    8. Figure: No. 4 Bearing Pressure Tube Nickel Plate Sealing Surfaces

    Sheet 1

    Legend
    No. 4 Bearing Pressure Tube Nickel Plate Sealing Surfaces

    Sheet 1

    Close

    Figure: Oversize Piston Rings

    Sheet 2

    Legend
    Oversize Piston Rings

    Sheet 2

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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