TASK 72-43-12-300-002 No. 4 Bearing Seal Spacer - Chromium Plate Repair The Contact Surfaces, Repair-002 (VRS3105)

DMC:V2500-A0-72-43-1200-01A-647A-C|Issue No:002.00|Issue Date:2018-02-01

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 72-43-12-300-002 No. 4 Bearing Seal Spacer - Chromium Plate Repair The Contact Surfaces, Repair-002 (VRS3105)

Effectivity

FIG/ITEM PART NO.

01-010

2A0857

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

No.4 bearing seal spacer

-

AMS 5355

General

Price and availability - refer to IAE

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
LatheLOCALLathe

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-43-12-320-053 Machine the Contact Surface(s) of the No. 4 Bearing Seal Spacer

    1. Refer to Figure.

      2. NOTE

        If both contact surfaces need to be repaired, make sure the 1.240 to 1.260 in. (31.50 to 32.00 mm) dimension is maintained.

        If there is chromium plate.

      1. Remove the chromium plate that is on the part by SPM TASK 70-33-02-300-503. If the cromium plate was not removed fully by SPM TASK 70-33-02-300-503, grind to remove the chromium plate.

      3. If there is no chromium plate, machine the contact surface(s) sufficiently to permit a plating thickness of 0.003 to 0.006in. (0.077 to 0.152 mm).

      1. Hold to the maximum axial dimension.

        All dimensions apply when Surface G is flat by 0.001in. (0.025 mm) and Diameter F maintains a clearance envelope of 5.130in. (130.302 mm) in a free or held condition.

        NOTE

        1. Part hardness must be more than HRC 40.

        2. Post-strip bake is necessary.

        Hold the spacer only on Surfaces G and H and Diameter F.

    2. SUBTASK 72-43-12-110-058 Clean the No. 4 Bearing Seal Spacer

      1. Clean the No. 4 bearing seal spacer.

      1. Refer to SPM TASK 70-11-03-300-503.

    3. SUBTASK 72-43-12-230-052 Examine the No. 4 Bearing Seal Spacer

      1. If you use grind procedure to remove chromium plate, then do a local fluorescent inspection of the repair area.

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

        NOTE

        Do not shotpeen.

        Use medium sensitivity, water washable. No cracks permitted.

    4. SUBTASK 72-43-12-110-059 Clean the Repair Area of No. 4 Bearing Seal Spacer

      1. Clean the repair area locally.

      1. Refer to SPM TASK 70-11-26-300-503.

    5. SUBTASK 72-43-12-350-001 Apply a Mask to the No. 4 Bearing Seal Spacer

      1. Apply a mask to the areas of the No. 4 bearing seal spacer that are not to be plated.

      1. Refer to SPM TASK 70-38-24-300-503.

    6. SUBTASK 72-43-12-330-052 Chromium Plate the Contact Surface(s) of the No. 4 Bearing Seal Spacer

    1. Refer to Figure.

      2. Chromium plate the contact surface(s).

      1. Refer to SPM TASK 70-33-02-300-503.

        Make sure to apply chromium plate a sufficient thickness to permit finish machining.

    7. SUBTASK 72-43-12-370-001 Bake After Chromium Plate

      1. Bake the No. 4 bearing seal spacer after chromium plate.

      1. Refer to SPM TASK 70-33-02-300-503. Do this process as quickly as possible in less than four hours after chromium plate.

    8. SUBTASK 72-43-12-220-057 Examine the No. 4 Bearing Seal Spacer

      1. Do a visual inspection of the plating for finish and bond.

      1. Refer to SPM TASK 70-33-02-220-502.

    9. SUBTASK 72-43-12-320-054 Grind the No. 4 Bearing Seal Spacer

    1. Refer to Figure.

      2. Grind the contact surface(s) with a lathe after chromium plate.

      1. Machine the contact surface so the chromium plate is 0.003 to 0.006in. (0.077 to 0.152 mm) thick.

        The axial dimension must be 2.149 to 2.151in. (54.585 to 54.635 mm).

        All dimensions apply when Surface G is flat by 0.001in. (0.025 mm) and Diameter F maintains a clearance envelope of 5.130in. (130.302 mm) in a free or held condition.

        Hold the spacer only on Surfaces G and H and Diameter F.

    10. SUBTASK 72-43-12-110-060 Clean the No. 4 Bearing Seal Spacer

      1. Clean the No. 4 bearing seal spacer.

      1. Refer to SPM TASK 70-11-03-300-503.

    11. SUBTASK 72-43-12-220-056 Examine the Repair

    1. Refer to Figure.

      2. Examine the seal spacer after chromium plate repair.

      1. Refer to Figure and TASK 72-43-12-200-000 (INSPECTION-000).

    12. SUBTASK 72-43-12-220-058 Identify the Repair

      1. Mark VRS3105 on the repaired No. 4 bearing seal spacer adjacent to the part number.

      1. Make a permanent mark by the procedure given in SPM TASK 70-09-00-400-501.

        Use vibration peen procedure.

        Remove high metal caused by marking the number.

    13. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial updates due to transcription errors during conversion, including removing the word "the" before SPM reference (REA17VC438 )

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Lathe
Tool Name:Lathe