TASK 79-21-41-300-025 Oil Pressure Pump/Filter Housing - Related Parts - Repair The Suction Strainer Locating Seat By Bushing In The Oil Pressure Pump, Repair-025 (VRS5325)

DMC:V2500-A0-79-21-4100-06A-664A-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 79-21-41-300-025 Oil Pressure Pump/Filter Housing - Related Parts - Repair The Suction Strainer Locating Seat By Bushing In The Oil Pressure Pump, Repair-025 (VRS5325)

Effectivity

FIG/ITEM

PART NO.

01-750

4A7089

01-750

4A7099

01-750

4A7304

Material of component

PART IDENT

SYMBOL

MATERIAL

Oil pressure pump

A357-T61 (AMS 4219)

Bushing

AA2024-T3 (AMS 4152K)

General

NOTE

To identify the consumable materials, refer to the PCI.

Price and availability - none.

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

Repair parts

FIG/ITEM

PART NO.

PART IDENT

QTY

01-837

4L7011

Bushing

1

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop Inspection EquipmentLOCALWorkshop Inspection Equipment
Grinding MachineLOCALGrinding Machine
Magnifying glassLOCALMagnifying glass
OvenLOCALOven
FreezerLOCALFreezer
Arbor PressLOCALArbor press
Vibroengraving equipmentLOCALVibroengraving equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 79-21-41-320-077 Machine the Suction Strainer Locating Seat in the Oil Pressure Pump

    1. Refer to Figure.

      2. Machine the strainer suction locating seat.

      1. The diameter of the bore must be between 1.8882 and 1.8898 in. (47.960 and 48.000 mm) after removal of the damage.

      2. The true position of the bore must be within 0.004 in. (0.100 mm) FIR in relation to diameter B, index 1.

      3. Bore surface rough must be 63 micro in. (1.6 micron).

    2. SUBTASK 79-21-41-220-170 Examine the Suction Strainer Locating Seat

      1. Inspect the pressure pump for cracks in locality of the suction strainer locating seat.

    3. SUBTASK 79-21-41-330-076 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined surfaces.

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

    4. SUBTASK 79-21-41-350-082 Install the Bushing

      CAUTION

      MAKE SURE THAT THE LEAD IN CHAMFER OF THE BUSHING POINTS AWAY FROM THE DRIFT.

    1. Refer to Figure.

    2. Install the bushing to drift.

      3. WARNING

        DO NOT TOUCH THE HOT PARTS WITHOUT PROTECTIVE GLOVES.

        WARNING

        HOT PARTS CAN CAUSE REDDENING AND BLISTERING OF THE SKIN IF THE HANDS ARE NOT PROTECTED.

        WARNING

        IMMERSE THE CONTACTED AREA IN COLD WATER FOR 10 MINUTES IF THE SKIN IS BURNED. IMMEDIATELY GET THE MEDICAL ATTENTION IF PAIN OR BLISTERING PERSISTS.

        Increase the temperature of the pressure pump and/or decrease the temperature of the assembled drift and bushing.

      1. Use an Oven and/or a Freezer. Do not increase the temperature of the pressure pump above 284 deg F (140 deg C).

      2. Do not decrease the temperature of the assembled drift and bushing below minus 58 deg F (minus 50 deg C).

        NOTE

        The difference in temperature between the parts must be 248 deg F (120 deg C).

      4. Remove the pressure pump from the Oven and/or the assembled drift and bushing from Freezer.

      1. Use protective gloves.

      5. CAUTION

        INSTALL BUSHING IN MACHINED BORE IMMEDIATELY AFTER REMOVAL FROM Freezer, OTHERWISE BUSHING CANNOT BE CORRECTLY INSTALLED.

        Install the bushing into machined bore.

      1. Use drift and an Arbor Press. Give sufficient back-up support at bushing bore area to prevent pressure pump distortion when you install the bushing.

    6. Let the parts get the room temperature.

    7. Remove the drift.

    5. SUBTASK 79-21-41-320-078 Machine the Inner Diameter of the Bushing

    1. Refer to Figure.

      2. Machine the inner diameter of the bushing.

      1. The last dimension of the inner diameter must be between 1.7327 and 1.7343 in. (44.0100 and 44.0500 mm).

      2. The true position of the diameter must be within 0.0020 in. (0.050 mm) FIR in relation to diameter B, index 1.

      3. Bore surface rough must be 63 micro in. (1.6 micron). Chamfer where necessary.

    6. SUBTASK 79-21-41-330-077 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined surface of the bushing.

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

    7. SUBTASK 79-21-41-350-083 Record the Repair

      1. Vibroengrave 'VRS5325' adjacent to the part number.

      1. Use Vibroengraving equipment. Remove the metal lifted by marking.

    8. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Arbor press
Tool Name:Arbor Press
Manufacturer Code:LOCAL
Tool Number:Freezer
Tool Name:Freezer
Manufacturer Code:LOCAL
Tool Number:Grinding Machine
Tool Name:Grinding Machine
Link not Found
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Manufacturer Code:LOCAL
Tool Number:Vibroengraving equipment
Tool Name:Vibroengraving equipment
Link not Found