TASK 72-32-19-300-002 Hydraulic Ring - Apply Chromium Plating, Repair-002 (VRS1231)

DMC:V2500-A0-72-32-1903-00A-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 72-32-19-300-002 Hydraulic Ring - Apply Chromium Plating, Repair-002 (VRS1231)

Effectivity

FIG/ITEM

PART NO.

01-140

5A0693

Material of component

DESCRIPTION

SYMBOL

MATERIAL

Hydraulic ring

Non-corrosion resistant steel

General

Price and availability - not applicable

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

NameManufacturerPart Number / IdentificationQuantityRemark
Chromium Plate equipmentLOCALChromium Plate equipment
External grinding machineLOCALExternal grinding machine
Magnetic particle inspection equipmentLOCALMagnetic particle inspection equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)LOCALCoMat 01-023
CoMat 01-050 SULFURIC ACID H2SO4LOCALCoMat 01-050
CoMat 02-005 ADHESIVE TAPE (MASKING)LOCALCoMat 02-005

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-32-19-330-051 Machine Worn Diameter D1

      NOTE

      If the surface has been previously repaired using chromium plate, remove old plating completely.

      1. Grind off the chromium plating to 4.39 in. (111.7 mm) diameter. Keep material removal to a minimum.

      1. Hold D1 to a maximum value, but any previous coating and damage must be completely removed.

      2. Refer to Figure.

    2. SUBTASK 72-32-19-370-051 Relieve the Hydraulic Ring after Plate Stripping

      1. Heat treat the part for one hour at 374 to 410 deg F (190 to 210 deg C).

      1. Refer to the SPM TASK 70-33-02-330-501.

    3. SUBTASK 72-32-19-240-053 Examine the Hydraulic Ring for Cracks

      1. Magnetic particle examine the repaired area.

        1. Refer to TASK 72-32-19-200-003 (INSPECTION-003, CONFIG-001).

        1. No cracks permitted.

    4. SUBTASK 72-32-19-330-052 Prepare the Hydraulic Ring for Plating

      1. Clean the part.

      1. Refer to the SPM TASK 70-33-02-330-501.

      2. Remove the grease.

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

      3. Mask all the surface except plating area.

    4. Wash the part in clean, cold water.

    5. SUBTASK 72-32-19-380-051 Etch the Hydraulic Ring before Plating

      1. Etch and wash the part.

      2. Refer to the SPM TASK 70-33-02-330-501.

    6. SUBTASK 72-32-19-330-053 Chromium Plate the Hydraulic Ring

      1. Immerse the part in a standard chromium plating solution for sufficient time to achieve the diameter 4.42 in. (112.2 mm) minimum.

      2. Refer to the SPM TASK 70-33-02-330-501.

      2. Treatment after plating.

      1. Refer to the SPM TASK 70-33-02-330-501.

    3. Wash the part thoroughly in clean, cold water.

    4. Immerse the part in hot water and remove the masking tape.

    5. Dry the part with clean compressed air, and vapor degrease.

    7. SUBTASK 72-32-19-330-054 Bake the Hydraulic Ring after Plating

    1. Bake the plated part as soon as possible (not later than 16 hours after plating) for 3 hours minimum at a temperature of 374 to 410 deg F (190 to 210 deg C).

    8. SUBTASK 72-32-19-220-061 Examine the Hydraulic Ring after Plating

    1. Refer to Figure.

      2. Visually examine the chromium deposit for the following.

      1. Refer to TASK 72-32-19-200-003 (INSPECTION-003, CONFIG-001).

        NOTE

        Pits.
        Visible cracks.
        Burning.
        Plating area.

      3. Dimensional check the plated area for diameter 4.42 in. (112.2 mm) minimum.

      1. Refer to TASK 72-32-19-200-003 (INSPECTION-003, CONFIG-001).

    9. SUBTASK 72-32-19-320-051 Grind the Hydraulic Ring after Plating

    1. Refer to Figure.

      2. Grind the plated area by normal grinding wheel to specified dimensions.

      1. Refer to the SPM TASK 70-33-02-300-501.

    10. SUBTASK 72-32-19-230-051 Examine the Hydraulic Ring after Grinding

    1. Refer to Figure.

      2. Visually examine the area of grinding for pits, cracks, burning and excessive roughness.

      1. Refer to TASK 72-32-19-200-003 (INSPECTION/CHECK-003, CONFIG-001).

    3. Dimensional check the area of grinding.

    11. Figure: Re-apply chromium plating - hydraulic ring

    Re-apply chromium plating - hydraulic ring

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-023
Type:sp01
Supply Short Name:CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)
Supply Name:CoMat 01-023 CHROMIUM TRIOXIDE CrO3(CHROM.ACID)
Specification Groups:
Doc NumberType
OMAT: 111 (RR REF)99,0 PURE FLAKE O-C-303
JCR-034 (JAEC REF)99,0 PURE FLAKE O-C-303
MTH 126 (MTU REF)99,0 PURE FLAKE O-C-303
Suppliers:
ManufacturerRemarks
LOCAL
U1185
70657
24853
K6835
Manufacturer Code:LOCAL
Supply Number:CoMat 01-050
Type:sp01
Supply Short Name:CoMat 01-050 SULFURIC ACID H2SO4
Supply Name:CoMat 01-050 SULFURIC ACID H2SO4
Specification Groups:
Doc NumberType
OMAT: 110 (RR REF)COMMERCIAL GRADE S.G. 1.84 B.S.753 O-S-809 TY1CL1
MTH 165 (MTU REF)COMMERCIAL GRADE S.G. 1.84 B.S.753 O-S-809 TY1CL1
Suppliers:
ManufacturerRemarks
LOCAL
K6835
70657
Manufacturer Code:LOCAL
Supply Number:CoMat 02-005
Type:sp01
Supply Short Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Supply Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Specification Groups:
Doc NumberType
OMAT: 2/94 (RR REF)AT 7 BLACK, WATERPROOF
Suppliers:
ManufacturerRemarks
LOCAL
U0415
K6835
Manufacturer Code:LOCAL
Tool Number:Chromium Plate equipment
Tool Name:Chromium Plate equipment
Manufacturer Code:LOCAL
Tool Number:External grinding machine
Tool Name:External grinding machine
Manufacturer Code:LOCAL
Tool Number:Magnetic particle inspection equipment
Tool Name:Magnetic particle inspection equipment