TASK 70-42-03-400-501 Install The Tab-type Key Washers

DMC:V2500-00-70-42-03-00A-712A-D|Issue No:001.00|Issue Date:2013-03-20

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 70-42-03-400-501 Install The Tab-type Key Washers

General

This TASK gives instructions on how to bend the keys and elliptical parts of single-hole key washers; also, key washers for use with more than one hole, or set against the flange of the part detail.

A straight key is one that is to be bent after the key washer is installed; while a bent key is one that is bent when the key washer is made.

Key washers must be installed with the straight keys set away from the axis of the parts to be locked. The bent keys (Refer to Figure - Key B) must always be set against the mating surface (Refer to Figure - Detail at C) or against the side of the hole (Refer to Figure - Detail A); to prevent movement of the parts to be locked.

NOTE

To identify the consumable materials refer to the PCI.

NOTE

Key washers must be used one time only. Use a new key washer for each assembly.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-081 PENCIL - METAL MARKING(HARD)86874CoMat 02-081

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 70-42-03-400-001 Bend the Straight Keys

    1. All straight keys must be bent after the assembly procedure to make sure that the key washers can not be used again. At least one key must be bent to give the clearance shown on Figure - Detail B; with at least 75 percent of its width (that is, AS MEASURED AT THE BOTTOM OF THE KEY) engaged with the flat side of the part to be locked (Refer to Figure). The remaining straight key or keys can then be bent as necessary.

    2. SUBTASK 70-42-03-400-002 Bend the Bent Keys

    1. The bent keys (Refer to Figure - Key B) must be bent to give the clearance shown on Figure - Detail at C.

    3. SUBTASK 70-42-03-400-003 Install the Elliptical Key Washers

    1. When elliptical key washers are installed they must be bent across a full flat of the part to be locked (Refer to Figure - Detail C); to give the clearance shown on Figure - Detail B.

    4. SUBTASK 70-42-03-400-004 Install Key Washers for Use With More Than One Hole

    1. The data specified in paragraphs 3. and 5. must also be applied to the keys for each hole; when a key washer for use with more than one hole is installed.

    5. SUBTASK 70-42-03-400-005 Install the Fuel Nozzle Nut Key Washers

    1. Apply a pressure to bend the keys of the fuel nozzle nut key washers; they must not be hit to bend the keys.

    6. SUBTASK 70-42-03-400-006 Control the Position of the Key Washer

    1. Use CoMat 02-081 PENCIL - METAL MARKING(HARD), to make marks on the key washer and on its adjacent mating surface; which does not move. This will show if the key washer turns, when the nut is tightened, which will cause damage to the internal keys.

    7. SUBTASK 70-42-03-210-001 Basic Specification

      1. The key washers are correctly installed when this basic specification is applied:

      1. A new key washer must always be used.

      2. The keys must always by bent as specified in paragraphs 2. to 8.

      3. When the keys are bent the key washer must not shake; also, the locked parts must not become loose.

    8. Figure: Install the tab-type key washers

    Install the tab-type key washers

    Figure: Install the key washers

    Install the key washers

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:86874
Enterprise Name:SANFORD CORPORATION
BU Name:SANFORD CORPORATION
Street:2711 WASHINGTON BLVD
City:BELLWOOD
State:IL
Zip Code:60104
Country:USA
Phone Number:1-708-547-6650, 1-800-323-0749
Fax Number:1-708-547-6719, 1-800-457-9208
Internet:www.sanfordcorp.com
Manufacturer Code:86874
Supply Number:CoMat 02-081
Type:sp01
Supply Short Name:CoMat 02-081 PENCIL - METAL MARKING (HARD)
Supply Name:CoMat 02-081 PENCIL - METAL MARKING(HARD)
Specification Groups:
Doc NumberType
PMC 4059-7PRISMACOLOR VERITHIN NO.753 or PRISMACOLOR THICK LEAD 949
Suppliers:
ManufacturerRemarks
86874