TB 430-04-37

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AN APPROPRIATE ENTRY SHOULD BE MADE IN THE AIRCRAFT LOGBOOK UPON ACCOMPLISHMENT

IF OWNERSHIP OF AIRCRAFT HAS CHANGED PLEASE FORWARD TO NEW OWNER

MODEL AFFECTED: 430

SUBJECT: ENGINE OIL COOLER FAN P/N 230-365-001-103,INTRODUCTION OF

HELICOPTERS AFFECTED: Model 430 helicopters serial number 49001 through49103

Model 430 helicopters serial numbers 49104 and

subsequent will have the intent of this bulletinaccomplished prior to delivery.

COMPLIANCE: Bell Helicopter recommends accomplishment ofthis bulletin

DESCRIPTION:

A number of reports have been received of oil cooler fans P/N 230-365-001-101

with sheared driveshaft. Evaluation of the parts indicates a need to increase thestrength of the driveshaft at the shear point.

This bulletin introduces an improved 230-365-001-103 oil cooler fan with a strongerdriveshaft. It also provides instructions to upgrade existing 230-365-001-101 oilcooler fans to the -103 configuration.

APPROVAL:

The engineering design aspects of this bulletin are Transport Canada approved.

MANPOWER:

Approximately 5.0 man-hours are required to complete this bulletin. Man-hours arebased on hands-on time, and may vary with personnel and facilities available.

No. 430-04-37

Date Sep 22, 04

Page 1 of 3

DATE

REV

TECHNICAL BULLETIN

A Subsidiary of Textron Inc.

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TB 430-04-37Page 2 of 3

MATERIALS:

Required Material:The following material is required for the accomplishment of this bulletin and may be

obtained through your Bell Helicopter Textron Supply Center.

Part Number Nomenclature Quantity44584-1 Note 1 Fan upgrade kit 1 per fan30990-1 Note 2 Fan upgrade kit 1 per fan

Note 1: This kit is required to upgrade oil cooler fan P/N 44540-1 manufactured byMeggitt Airdynamics Inc. (formerly Noah Howden / Howden Airdynamics, Inc).Identify the fan manufacturer by looking at the nameplate on the component.

Note 2: This kit is required to upgrade oil cooler fan P/N 30990 manufactured by

Smiths Aerospace (formerly Able Corporation Inc). Identify the fan manufacturer bylooking at the nameplate on the component.

SPECIAL TOOLS:

None required

WEIGHT AND BALANCE:

Not affected

ELECTRICAL LOAD DATA:

Not affected

REFERENCES:

BHT-430-MM-9, Chapter 79BHT-430-CR&O-V.2 Component Repair and Overhaul Manual Vendor Data

PUBLICATIONS AFFECTED:

BHT-430-CR&O-V.2 Component Repair and Overhaul Manual Vendor Data

ACCOMPLISHMENT INSTRUCTIONS:

1. Remove oil cooler fan(s) P/N 230-365-001-101 from the aircraft. Refer to BHT-430-MM-9, Chapter 79. Identify the fan manufacturer by looking at the nameplate.

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TB 430-04-37Page 3 of 3

2. Following the procedure listed in the applicable Vendor Service Bulletin andComponent Maintenance Manual included with this bulletin, upgrade existing -101oil cooler fan(s) to 230-365-001-103 configuration.

3. Install new or upgraded oil cooler fan(s) P/N 230-365-001-103 on the aircraft. Referto BHT-430-MM-9, Chapter 79.

4. Annotate the oil cooler fan(s) history card and the aircraft records to reflectcompliance with this bulletin.

5. Remove the existing version of the oil cooler fan component maintenance manualsfrom the BHT-430-CR&O-V.2 Component Repair and Overhaul Manual VendorData and insert the revised component maintenance manuals supplied with thisbulletin.

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Smiths Aerospace NO. 30990-79-00123695 Via Del Rio Date: 10-15-03

Yorba Linda, CA 92887 Rev: 09-22-04

Page 1of 9

SERVICE BULLETIN

1. PLANNING INFORMATIONA. Effectivity

1. Component Affected

This Service Bulletin is applicable to the Shaft Driven Axial Fan, Part No. 30990, including all serialnumbers in service. Shaft Driven Axial Fans modified by this Service Bulletin will be reidentified asPart No. 30990-1 by application of a new identification plate.

Nomenclature Part Number Effectivity code

Bell Helicopter Textron (old) Fan, Oil Cooler 230-365-001-101 NA

Bell Helicopter Textron (new) Fan, Oil Cooler 230-365-001-103 NA

Smiths Aerospace (old) Fan, Axial, Shaft Driven 30990 A

Smiths Aerospace (new) Fan, Axial, Shaft Driven 30990-1 B

B. Concurrent Requirements

Not applicable.

C. Reason

The modification described in this Service Bulletin will resolve the fatigue failures occurring in the ShaftDriven Axial Fans shear section.

D. Description

This Service Bulletin accomplishes the following:

1. Replacement of shaft Part No. 30295 with new shaft Part No. 33499

2. Replace nameplate Part No. 30276 with new nameplate Part No. 33498.

E. Compliance

It is recommended that this modification be accomplished at the earliest practical maintenance period.

F. Approval

Not Applicable

G. Manpower

Note: Man-hours are estimated based on work to be performed by experienced personnel on unitwhich has been placed in a maintenance status. Only actual work performed on unit isaccounted for in man-hour estimates. No man-hours have been estimated to perform thefollowing or other incidental work required to accomplish this Service Bulletin:

1. Preparation for the modification: Examples; removal of unit from aircraft, purging,obtaining tools, and jacking when not essential to the modification.

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Page 2of 9

2. Nonproductive elapsed time: Examples; cleaning, paint drying time, lunch and/or restperiods, and quality assurance inspections.

3. Administrative functions: Examples; planning, engineering liaison, parts requisition,shift change coordination, and report writing.

Operators should take the above into consideration when scheduling this modification.

This modification may be accomplished in the approximate man-hours or elapsed hours per unit:

Total Man-Hours 4 hrs

Total Elapsed Hours 4 hrs

H. Weight and Balance

This modification will increase the weight of the fan assembly by approximately .002 pounds.

I. Electrical Load Data

Not Applicable

J. Software Accomplishment Summary

Not Applicable

K. References

1. Data used in preparation of this Service Bulletin:

Note: Documents are not required by the operator to plan or accomplish this Service Bulletin.

Data Identification Change Type of Data

CMM 79-20-01 APR 15/97 Component Maintenance Manual

30990 C Assembly Drawing

30990-1 A Assembly Drawing

L. Publications Affected

None affected.

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Page 3of 9

M. Interchangeability or Intermix ability of Parts

The modified Shaft Driven Fan Assembly, Part No. 30990-1, is fully interchangeable with the existingShaft Driven Fan Assembly, Part No. 30990. However, the use of older parts will cancel the intent ofthis Service Bulletin.

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Page 4of 9

2. MATERIAL INFORMATION

A. Material -

1. Parts List

The following parts are required to modify the Shaft Driven Axial Fan:

Part Number Nomenclature Qty Cage Supplier

33499 Shaft 1

33498 Nameplate 1

30299 Shim 1

B. Industry Support Information

Not affected.

C. Parts required to Modify Spares

Same as parts listed in paragraph 2.A.1.

D. Reidentified Parts

Part number information for all reidentified parts:

NomenclatureExisting PartNumber

Part NumberAfter Modification

Shaft Driven Axial Fan 30990 30990-1

E. Tooling

There is no tooling required to modify the Shaft Driven Axial Fan.

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Page 5of 9

3. ACCOMPLISHMENT INSTRUCTIONS

A. Disassemble the Shaft Driven Axial Fan as Follows (Refer to Figure 1)

1. Remove nameplate (5)

2. Remove 4 screws (115), washers (120) and closure plate (110).

Caution: Use coupling (10) to hold shaft (95) while removing nut (15).

3. Remove nut (15), washer (20) and coupling (10) from shaft (95).

4. Remove 2 keys (25) and shims (30).

5. Remove 5 screws (40), washers (45) and seal assembly (35) from stator housing (140).

Caution: Use square recess in shaft (85) to hold shaft (85) while removing locknut (55).

6. Remove locknut (55), washer (60) and impeller (50) from shaft (85).

7. Remove shaft subassembly (85), sleeve (105), wave spring (135), ball bearing (125), and pin (130)from stator housing (140).

8. Remove pin (90) from shaft (85).

9. Remove shaft (95) from shaft (85)

10. Clean any dirt/debris from shaft (85) opening after removal of shaft (95) using a lint-free cloth. Donot let dirt/debris fall into shaft (85) opening and do not wipe or clean inside of shaft (85) opening asthis will contaminate the needle bearings (100).

B. Reassemble the Shaft Driven Axial Fan as follows (Refer to Figure 1):

1. Install wave spring (135) in sleeve (105).

2. Install ball bearing (125) in sleeve (105), install pin (130)

3. Install sleeve (105) in stator housing (140) using two washers (120) and two screws (115) 180apart. Torque screws (115) to 20-30 in-lbs (2.4-3.6 Nm)

4. Install new shaft Part no. 33499 (95) into shaft (85) and secure with pin (90).

5. Install shaft (85) in ball bearing (125).

6. Install ball bearing (80) in sleeve (65); install ball bearing subassembly (80) onto shaft (85) andmate sleeve (65) to stator housing (140); install four washers (75) and screws (70). Torque screwsto 20-30 in-lbs (2.4-3.6 Nm).

Caution: Use square recess in shaft (85) to hold shaft (85) while installing and applying torqueto locknut (55).

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Page 6of 9

7. Install impeller (50); secure with washer (60) and locknut (55). Torque locknut to 40-50 ft-lbs (57.6-72.0 Nm).

8. Install seal assembly (35) to stator housing (140) using five washers (45) and screws (40). Torquescrews to 20-30 in-lbs (2.4-3.6 Nm).

Note: Quantity of shims (30) may require change after nut (15) is torqued to achieve dimensiongiven in figure 2.

9. Install same amount of shims (30) as removed at disassembly.

Caution: Use coupling (10) to hold shaft (85) while installing and applying torque to nut (15).

10. Install two keys (25) and coupling (10); secure with washer (20) and nut (15). Torque nut (15) to240-260 in-lbs (28.8-31.2 Nm).

11. Check dimensions shown in figure 2. Increase or decrease quantity of shims (30) to achieverequired dimension

12. Install closure plate (110) using two washers (120) and screws (115). Torque to 20-30 in-lbs (2.4-3.6 Nm).

13. Transfer serial number from old nameplate to new nameplate Part No. 33498 (5). Remove foilbacking from new nameplate (5) and adhere to stator housing (140) in location shown on figure 1.

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Page 7of 9

FIGURE 1

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Page 8of 9

FIG.ITEMNO.

PART NUMBER NOMENCLATUREEFF

CODE

UNITSPER

ASSY

1 30990 Shaft Driven Axial Fan A RF

1 30990-1 Shaft Driven Axial Fan B RF

5 30276 Nameplate A 1

5 33498 Nameplate B 1

10 30274 Coupling 1

15 MS21043-5 Nut, Self Locking 1

20 30298 Washer 1

25 MS20066-1 Key 2

30 30299 Shim 1

35 30525 Seal Assembly 140 NAS1351C3-8 Screw 5

45 NAS620C10 Washer 5

50 30269 Impeller 1

55 X20411 Locknut, Bearing 1

60 30275 Washer 1

65 30272 Sleeve 1

70 NAS1351C3-8 Screw 4

75 NAS620C10 Washer 4

80 X20102 Ball Bearing 1

85 30271 Shaft 1

90 MS30986-244 Pin 1

95 30295 Shaft A 1

95 33499 Shaft B 1

100 X20412 Bearing, Needle 2

105 30273 Sleeve 1

110 30277 Plate, Closure 1

115 NAS1351C3-8 Screw 4120 NAS620C10 Washer 4

125 30293 Bearing, Ball 1

130 30294 Pin 1

135 X20051 Spring, Wave 1

140 30265 Housing, Stator 1

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Page 9of 9

FIGURE 2 Assembly Dimensions

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Page T-1/T-2

March 1, 2004

79-20-01

AEROSPACE

23695 Via Del Rio Yorba Linda, CA 92887-2715Fax (714) 692-0259 Telephone (714) 692-0200

COMPONENT MAINTENANCE MANUAL

WITH

ILLUSTRATED PARTS LIST FOR30990 and 30990-1

SHAFT DRIVEN AXIAL FAN

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AerospaceCOMPONENT MAINTENANCE MANUAL

Page RR-1/RR-2

Mar 1/04

79-20-01

RECORD OF REVISIONS

This page provides a record of manual revisions. Whenever you receive revision or update pages,replace the old pages with the new and log the information in the following table.

REVISIONNUMBER REVISIONDATE DATEFILED BY

1 Mar 1/04 Mar 1/04 Smiths

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79-20-01

RECORD OF TEMPORARY REVISIONS

This page provides a record of temporary revisions. Whenever you receive a temporary revision,insert the temporary revision in the manual opposite the first affected page and log the informationin the table given below. Remove the temporary revision when the manual is revised.

NOTE: Temporary revisions are printed on yellow paper with the heading TEMPORARYREVISION.

REVISIONNUMBER

REVISIONDATE

DATEFILED BY

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Page SB-1/SB-2

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SERVICE BULLETIN LIST

When a Service Bulletin is received for this assembly, perform the instructions given, log it into theService Bulletin List given below, and insert the Service Bulletin into this section to maintain ahistorical record.

NOTE: Alert Service Bulletins are produced on blue colored paper with the heading ALERT. Whenan ALERT Service Bulletin is received, take immediate action.

SERVICE BULLETIN DATE TITLE

DATE OFINCORPORATION

INTO MANUAL

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Page LEP-1/LEP-2

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79-20-01

LIST OF EFFECTIVE PAGES

SUBJECT PAGE DATE

Title Page T-1 Mar 1/04 T-2 Blank

Record ofRevisions

RR-1RR-2

Mar 1/04Blank

Record ofTemporaryRevisions

RTR-1RTR-2

Mar 1/04Blank

Service BulletinList

SB-1SB-2

Mar 1/04Blank

List of EffectivePages

LEP-1LEP-2

Mar 1/04Blank

Table ofContents

TOC-1TOC-2

Mar 1/04Blank

Introduction Intro-1 Mar 1/04 Intro-2 Mar 1/04Description andOperation

12

Mar 1/04Mar 1/04

Testing andFault Isolation

23

Mar 1/04Mar 1/04

4 Mar 1/04 5 Mar 1/04Disassembly 5 Mar 1/04 6 Mar 1/04Cleaning 6 Mar 1/04

7 Mar 1/04Check 7 Mar 1/04 8 Mar 1/04 9 Mar 1/04

SUBJECT PAGE DATE

Repair 10 Mar 1/04 11 Mar 1/04Assembly 11 Mar 1/04 12

13Mar 1/04Mar 1/04

14 Mar 1/04Fits andClearances

1415

Mar 1/04Mar 1/04

Special Tools,

Fixtures andTest Equipment

15

16

Mar 1/04

Mar 1/04

Illustrated PartsList

1718

Mar 1/04Mar 1/04

19 Mar 1/04 20 Mar 1/04 21 Mar 1/04 22 Blank

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TABLE OF CONTENTS

Paragraph Title Page

DESCRIPTION AND OPERATION.....................................................................................................1TESTING AND FAULT ISOLATION ...................................................................................................2

DISASSEMBLY...................................................................................................................................5CLEANING..........................................................................................................................................6CHECK................................................................................................................................................7REPAIR.............................................................................................................................................10ASSEMBLY.......................................................................................................................................11FITS AND CLEARANCES ................................................................................................................14SPECIAL TOOLS, FIXTURES, AND EQUIPMENT ..........................................................................15ILLUSTRATED PARTS LIST (IPL) ...................................................................................................17

LIST OF TABLES

Table Title Page

1. Technical Properties.............................................................................................................22. Test Equipment ....................................................................................................................23. Fault Isolation Chart .............................................................................................................54. Cleaning Materials................................................................................................................65. Check Tools and Materials ...................................................................................................76. Check Requirements............................................................................................................87. Repair Materials .................................................................................................................108. Assembly Tools and Materials ...........................................................................................12

9. Storage Materials ...............................................................................................................1310. Assembly Torque Limits .....................................................................................................1411. Fits and Clearances ...........................................................................................................1512. Special Tools, Fixtures, and Equipment .............................................................................15

LIST OF ILLUSTRATIONS

Figure Title Page

1. Shaft Driven Axial Fan..........................................................................................................1

2. Test Setup............................................................................................................................33. Assembly Dimensions ........................................................................................................13IPL 1. Shaft Driven Axial Fan, Exploded View..............................................................................20

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Page INTRO-1

Mar 1/04

79-20-01

INTRODUCTION

1. SCOPE

This Component Maintenance Manual (CMM) contains maintenance instructions and listsreplacement parts for the Shaft Driven Axial Fan, PN 30990 and 30990-1. The Shaft Driven

Axial Fan, hereinafter referred to as the fan, is manufactured by Smiths Aerospace, YorbaLinda, California.

2. PRODUCT SUPPORT SERVICES

Contact Smiths Aerospace for repair services, technical documents, spare parts and otherproduct support services.

3. USAGE GUIDE

A. Refer to Table of Contents to find the procedures or maintenance information.

(1) Description and Operationdescribes the purpose, primary components, andtechnical properties of the blower.

(2) Testing and Fault Isolationcontains bench test and fault isolation procedures.

(3) Disassemblycontains procedures to disassemble the blower for repair or partreplacement.

(4) Cleaning contains procedures to clean the blower.

(5) Check contains procedures to check parts for excessive wear, corrosion, and otherdamage.

(6) Repaircontains procedures to refinish and rework parts to a serviceable condition.

(7) Assemblycontains procedures to reassemble and store the blower.

(8) Fits and Clearancesgives wear limits and assembly torque values.

(9) Special Tools, Fixtures, and Equipmentcontains a list of recommended specialtools, fixtures and test equipment.

(10) Illustrated Parts Listcontains information needed to order replacement parts. Anexploded view illustration is provided to help find and identify the parts.

B. Each section contains a table of recommended tools and materials. Equivalent items canbe used.

4. REVISION SERVICE

Revised pages will be issued when necessary throughout the service life of the blower. The revised partof the page will be identified by a change bar or capital R in the left margin.

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79-20-01

5. ABBREVIATIONS AND UNIT SYMBOLS

Abbreviations and unit symbols used in this manual are defined below. Unless otherwisespecified, all weights and measurements are given first in English standard units followed bythe metric equivalent in parentheses.

AR As RequiredASSY AssemblyATA Air Transport AssociationCAGE Commercial And

Government Entitycm centimeter (1cm = 0.394

inch)CMM Component Maintenance

ManualContd Continueddia. DiameterEFF Effectivity

FIG FigureID Inside Diameterin Inchin-lb Inch-pound (torque)

in.Hg Inches of mercuryIPL Illustrated Parts ListkPag kiloPascal gauge

(1 kPag = 0.15 psig)lb PoundLTR LetterMHA Next Higher AssemblyOD Outside DiameterPN Part Numberpsig Pounds per square inch

gaugeRF Reference

SB Service BulletinSCD Source Control DrawingTHD Thread

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Page 1

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1. DESCRIPTION AND OPERATION

A. Description

The fan is a shaft driven axial fan which is designed to operate at approximately 9545RPM. The fan consists of a coupling, seal assembly, impeller, bearings, stator housing

and shaft (Figure 1).

B. Operation

The fan must be connected to a motor and drive system capable of producing a minimumof 7 HP at 9545 RPM to the fan input coupling. The fan must be firmly connected at thesix mounting holes on the stator housing.

C. Technical Properties

Technical properties of the fan are given in Table 1.

Figure 1. Shaft Driven Axial Fan

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Table 1Technical Properties

PROPERTY SPECIFICATION

Mounting Accommodations:

Stator Housing Six 0.196-0.201 in. (0.498-0.511 cm) diametermounting holes.

Coupling 0.2505-0.2520 in. (0.6362-0.6400 cm) attachingholes.

Operating Speed 9545 RPM

Dimensions and Weight:

Overall Dimensions (approx.)

Diameter 10.250 in. (260.35 cm)

Length 9.250 in. (23.495 cm)

Weight (maximum) 10.6 lbs. (4.818 kgs)

2. TESTING AND FAULT ISOLATION

A. General

Recommended test equipment is given in Table 2.

NOTE: Equivalent items can be used.

Table 2Test Equipment

NOMENCLATURE PART ORSPECIFICATION

NUMBER

SOURCE (CAGE)*

AC Electric Motor Commercially Available

Flow Straightener Smiths Aerospace (V56231)

Manometer (water) Commercially Available

Orifice Plate Smiths Aerospace (V56231)

Piezometer Ring Smiths Aerospace (V56231)

Test Fixture Smiths Aerospace (V56231)Torque Meter Commercially Available

Transition Piece Smiths Aerospace (V56231)

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Page 3

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79-20-01

B. Test Conditions

Conduct tests at the following conditions:

Temperature 55 to 91 F (12.8 to 32.8 C)

Relative Humidity 35 to 65%

Atmospheric Pressure 25.5 to 30.5 in. Hg

C. Test Procedures

All test measurements shall be made with instruments that have been calibrated inaccordance with MIL-STD-45662 and shall have an accuracy of at least 1/3 thetolerance to be measured.

(1) Rated Flow Test

(a) Install the fan into the test setup shown in Figure 2. The blower is loaded todesign conditions using the orifice plate.

(b) Operate the blower at approximately 9545 RPM and record the following.

Impeller Speed N RPMStatic Pressure Rise Ps3 In H2OBarometric Pressure Pb In HgWet Bulb Temperature WBT FDry Bulb Temperature DBT FInput Torque T in-lb

Figure 2. Test Setup

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(c) The air flow rate, total pressure rise of the fan and input power shall becalculated using the following equations which are derived from AMCAStandard 210-85.

where:

Q = Air Flow Rate (CFM)

Ps 3 = Measured Static Pressure (in. H2O)

K = Flow Rate Calibration Constant

?a = Ambient Air Density (lb/ft3)

P t = Total Pressure Rise Across Blower (in. H2O)

N = Measured Impeller Speed (RPM)

Ld = Duct Loss Calibration Constant

Pi = Input Power Corrected to Design Conditions (Watts)

Pm = Measured Input Power (Watts)

(d) The fan shall produce an air flow rate of 1600 CFM minimum with a totalpressure rise of 12.0 in H2O minimum corresponding to a design density of0.0673 lb/ft3. Also, the corrected input power shall not exceed 5.4 HP.

D. Fault Isolation

Fault isolation instructions are given in Table 3.

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Table 3Fault Isolation Chart

Trouble Probable Cause Corrective Action

Fan fails to produce requiredflow rate Fan was not turning atapproximate test RPM Adjust RPM

Inlet flow obstructed Provide adequate inlet flow

Total pressure rise fails to meetminimum requirement

Improper orifice plate Provide proper orifice plate

Fan operating at inadequateRPM

Rerun test at required RPM

Power required to achieveproper test results exceeds5.4 HP

Bearings in fan are worn ordamaged

Replace bearings

Fan internal parts are worn ordamaged

Disassemble, check allcomponents and reassemble

Fan develops vibration orexcess noise during testing

Possible misalignment amongfan, linkage, and/or powersource

Realign as required

Bearings in fan are worn ordamaged

Replace bearings

Fan internal parts are worn ordamaged

Disassemble, check allcomponents and reassemble

3. DISASSEMBLY

A. Refer to Testing and Fault Isolation to determine extent of disassembly required.Disassemble the fan only to extent necessary to accomplish repairs and return unit toserviceable condition.

B. Disassemble the fan in accordance with the following procedures (refer to IPL Fig. 1)

(1) Do not remove nameplate (5) unless replacement is necessary (refer to REPAIR Section).CAUTION: ONLY USE COUPLING (10) TO HOLD SHAFT (95) WHILE REMOVING NUT (15).

(2) Remove nut (15), washer (20) and coupling (10) from shaft (95) .

(3) Remove two keys (25) and shims (30). Record number of shims (30) for aid in assembly.

(4) Remove five screws (40), washers (45) and seal assembly (35) from stator housing (140).

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Page 6

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CAUTION: ONLY USE SQUARE RECESS IN SHAFT (85) TO HOLD SHAFT (85)WHILE REMOVING LOCK NUT (55).

(5) Remove locknut (55), washer (60) and impeller (50) from shaft (85).

(6) Remove four screws (70), washers (75) and sleeve (65).

(7) Remove ball bearing (80) from sleeve (65).

(8) Remove pin (90) and shaft (95) from shaft (85) .

(9) Do not remove two needle bearings (100) from shaft (85) unless replacement is necessary(refer to REPAIR Section).

(10) Remove four screws (115), washers (120), sleeve (105) and closure plate (110).

(11) Remove ball bearing (125), pin (130) and wave spring (135) from sleeve (105).

(12) Do not remove inserts (145) from stator housing (140) unless replacement isnecessary (refer to REPAIR Section).

4. CLEANING

A. Cleaning Materials

Recommended cleaning materials are listed in Table 4.


Table 4Cleaning Materials

NOMENCLATURE PART/SPECIFICATION NO. SOURCE

Brush, Stiff Bristle, Non -metallic

Federal Specification H-B-1490 Commercially available

Cloth, Lint-free Military SpecificationMIL-C-85043

Commercially available

Goggles, Safety --- Commercially available

Tank, Compressed air, 20psig (140 kpag)

--- Commercially available

Solvent, Dry Cleaning Federal Specification

P-D-680, Type III


B. Cleaning Instructions

WARNING: THE CLEANING SOLVENTS ARE VERY FLAMMABLE AND CANIRRITATE YOUR EYES AND NOSE. USE THE SOLVENTS ONLY INWELL VENTILATED AREAS AWAY FROM OPEN FLAMES. FLUSHIRRITATED EYES WITH WATER.

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Page 7

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(1) Clean the parts with lint-free cloth and solvent. Use a nonmetallic, stiff bristlebrush to scrub the parts. Pay special attention to the gears, cavities, threads,packing grooves, and other critical and hard-to-clean surfaces.

WARNING: WEAR SAFETY GOGGLES OR OTHER EYE PROTECTIONWHEN USING COMPRESSED AIR. DIRECT THE AIR STREAM

AWAY FROM OTHER PEOPLE.

(2) Dry the parts with clean, lint-free cloth or compressed filtered air at less than 20psig (140 kPag).

(3) Store the parts with clean, plastic bags or on clean, lint-free cloth until the partsare needed for Check or Assembly.

5. CHECK

A. General

(1) Recommended tools and materials are given in Table 5. Use standard shoptools for the dimensional checks.


Table 5Check Tools and Materials

NOMENCLATURE PART/SPECIFICAT ION NO. SOURCE (CAGE)*

Bright Light (for visual checks) --- Commercially available

Magnifier, 5-10X --- Commercially available

*Refer to the IPL, paragraph B, for the address

(2) Component check requirements are given in Table 6.

(3) Pay special attention to the bearing holes, counterbores, and other areassusceptible to cracks, wear, galling, metal pick-up, nicks, burrs, and otherdamage.

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Page 8

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Table 6Check Requirements

COMPONENT METHOD OFINSPECTION

CHECK FOR CORRECTIVEACTION

All parts Visual Nicks, cracks, cuts ,scoring, gouges, distortion,corrosion, or other damagethat could affect unitoperation

Repair minor nicks,scratches; replaceall non-repairable

parts

All threaded parts Visual Crossed or stripped threads Repair the part if lessthan 50 percent of onethread is damaged;replace all non-

repairable parts

All parts given inFits and

Clearances

Dimensional Dimensions and play within

service wear tolerances

Replace the partswith excessive

uneven wear

Fan (IPL Figure 1)

Nameplate (5) Visual Legibility and security ofmounting

Replace

Coupling (10) Visual Nicks, cracks, or distortion;loose or damage to anodic

finish

Repair minor nicks,scratches; replace

non-repairable parts.

Dimensional ID of attaching holes shall notbe larger than 0.2520 in

(0.6400 cm)

Replace

Seal Assembly (35) Visual Nicks, cracks or distortion Replace

Impeller (50) Visual Nicks, cracks, cuts, scoring,gouges, distortion of blades;

damage to anodic finish

Repair minor nicks,scratches; replace the

non-repairable parts

Dimensional Maximum diameter acrossblades shall be less than8.400 in (20.32 cm)

Replace

ID that mates with OD of shaft(85) shall not be greater than

0.9850 in. (2.5019 cm)

Replace

Inspect Penetrant inspect perMIL- STD-6866

Replace

Sleeve (65) Visual Nicks, cracks or distortion;damage to anodic finish



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Table 6Check Requirements (Contd)

COMPONENT METHOD OFINSPECTION

CHECK FOR CORRECTIVEACTION

IPL Figure 1 (Contd)Ball Bearings (80,135); Needle Bearings

(100)

Visual/Mechanical Rotate inner race andcheck for roughness or

sticking

Replace

Shaft (85) Visual Nicks, cracks ordamage bearingsurfaces; damage orwear to hole for pin(90); damage to

passivate finish



Dimensional ID that mates with

needle bearings (100)shall not be greaterthan 0.7505 in. (1.9063

cm)

Replace

OD that mates withimpeller (50) shall notbe less than 0.9839 in.

(2.4991 cm)

Replace

Shaft (95) Visual Nicks, cracks ordamaged threads;damage or wear tohole for pin (90);damage to passivate

finish



Sleeve (105) Visual Nicks, cracks ordistortion; damage topassivate finish

Repair minor nicks,scratches; replace thenon-repairable parts

Closure Plate (110) Visual Nicks, cracks ordistortion, damage toanodic finish

Repair minor nicks,scratches; replace thenon-repairable parts

Stator Housing (140) Visual Nicks, cracks ordistortion; loose or

damaged inserts (145);damage to anodic

finish



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6. REPAIR

A. General

(1) Use the appropriate procedures given below to repair damaged parts. Replace parts that aredamaged or worn beyond repair.

(2) Recommended tools and material are given in Table 7.


(3) Replace two keys (25), pin (90) wave springs (125) and pin (130) at each overhaul.

Table 7Repair Materials

NOMENCLATURE PART/SPECIFICATION NO. SOURCE (CAGE)*

Alodine, Brush No. 1200 Amchem Products (V84063)Cloth, Abrasive

Aluminum OxideCrocus

Federal Specification

P-C-451P-C-458


Passivate Finish IAW MIL-S-5002 Commercially available

Thread Chaser - - - Commercially available

*Refer to the IPL, paragraph B, for the address.

B. Repair Minor Thread Damage

Repair threaded parts if less than 50 percent of one thread is damaged. Chase the threads with adie or tap.

C. Repair Nicks, Burrs and Scratches on Metal Parts

CAUTION: DO NOT USE CROCUS ABRASIVE CLOTH ON ALUMINUM, ORALUMINUM ALLOY PARTS. CROCUS CLOTH CONTAIN AN IRONOXIDE WHICH CAN RAPIDLY OXIDIZE ALUMINUM.

(1) Polish out minor nicks, scratches, and corrosion on steel parts with crocus abrasive cloth(Table 7). Polish aluminum and aluminum alloy parts with aluminum oxide abrasive cloth(Table 7).

(2) Clean the reworked parts before assembly.

D. Repair Damage to Surface Finishes

(1) Clear Anodized Finishes

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WARNING: ALODINE IS VERY FLAMMABLE AND CAN IRRITATE YOUR EYESAND NOSE. USE ALODINE ONLY IN WELL VENTILATED AREASAWAY FROM OPEN FLAMES. WEAR RUBBER GLOVES, APRON,AND GOGGLES TO AVOID CONTACT WITH THE SOLUTION.

(a) Repair the anodic finish on the coupling (10), impeller (50), sleeve (65) and

closure plate (110) with No. 1200 brush Aldine (Table 7). Apply the Alodine asgiven below.

NOTE: Brush Alodine can be applied with an acid-resistance brush, swab,synthetic sponge, or portable spray equipment (paint spray gun orinsect sprayer).

(b) Clean the component to remove grease, oil and corrosion.

(c) Apply undiluted Alodine liberally to the aluminum surface. Apply as manycoats as needed, with approximately one minute reaction time between theapplications.

NOTE: The Alodine will form more rapidly when the Alodine and the partare at room temperature (approximately 65F to 75 F). Normallyone to five minutes is required for the coat to form.

(d) Remove excess Alodine with clean water and lint-free cloth. Use lint-freecloth or compressed air at less than 20 psig (140 kPag) to dry the part. Payspecial attention to the seams, joints, and crevices.

(2) Passivate Finishes

Repair the passivate finish on the shaft (85), shaft (95), sleeve (105) and statorhousing (140) per MIL-S-5002.

E. Replace Threaded Inserts

Replace threaded inserts (145) in stator housing (140) in accordance with standardshop practices.

7. ASSEMBLY

A. General

(1) This section contains assembly and storage instructions.

(2) Recommended tools and materials are given in Table 8.


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Table 8Assembly Tools and Materials


Torque Wrench 0-100 in-lbs (0-12 Nm) Commercially available

Torque Wrench 200-300 in-lbs (24-36 Nm) Commercially available

Torque Wrench 40-50 ft-lbs (5.53-6.92 kg/m) Commercially available

B. Assemble Fan (Refer to IPL Figure 1)

(1) Install wave spring (135) in sleeve (105).

(2) Install ball bearing (125) in sleeve (105); install pin (130).

(3) Install sleeve (105) in stator housing (140) using two washers (120) and screws (115)180 apart. Torque screws (115) to 20-30 in-lbs (2.4-3.6 Nm).

(4) Install both needle bearings (100) in shaft (85).

(5) Install shaft (95) in shaft (85) and secure with pin (90).

(6) Install shaft (85) in bearing (125).

(7) Install ball bearing (80) in sleeve (65); install sleeve (65) on shaft (85) and mate tostator housing (140); install four washers (75) and screws (70). Torque screws (70)to 20-30 in-lbs (2.4-3.6 Nm).

CAUTION: ONLY USE SQUARE RECESS IN AFT END OF SHAFT (85) WHILE

TORQUING LOCK NUT (55). DO NOT HOLD SHAFT (95) WHILETORQUING LOCKNUT (55).

(8) Install impeller (50); secure with washer (60) and locknut (55); torque locknut to 40-50 ft-lbs (57.6-72.0 Nm).

(9) Install seal assembly (35); secure with five washers (45) and screws (40); torquescrews to 20-30 in-lbs (2.4-3.6 Nm).

NOTE: Quantity of shims (30) may require change after nut (15) is torqued toachieve dimension given in Figure 3.

(10) Install same quantity of shims (30) as removed at disassembly.

CAUTION: ONLY USE COUPLING (10) TO HOLD SHAFT (85) WHILEINSTALLING AND APPLYING TORQUE TO NUT (15).

(11) Install two keys (25) and coupling (10); secure with washer (20) and nut (15); torquenut (15) to 240-260 in-lbs (28.8-31.2 Nm) .

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(12) Check dimension shown in Figure 3. Increase or decrease quantity of shims (30) toachieve required dimension.

(13) Install closure plate (110) using two washers (120) and screws (115) Torque screwsto 20-30 in-lbs (2.4-3.6 Nm).

Figure 3. Assembly Dimensions

C. Storage

(1) Storage Materials

The recommended storage materials are given in Table 9.


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Table 9Storage Materials


Bag, polyethylene Military Specification

MIL-B-117


Box, Corrugated Paper Federal SpecificationPPP-B-636


Dessicant Military Specification

MIL-D-3464, Class 1


Identification Tag --- Commercially available

Nylon Film, 2 Mil --- Commercially available

(2) Storage Instructions

(a) Clean the fan (refer to CLEANING Section).

(b) Write identifying data on identification tag. Attach the tag to the fan.

(c) Place dessicant with fan and wrap the fan in nylon film to cushion the fan and toprevent damage to the barrier bag.

(d) Heat-seal the fan in nylon film to cushion the fan and to prevent damage to the barrierbag.

(e) Place the fan in a polyethylene bag and wrap the bagged fan in a minimum of twolayers of cellulose wadding.

(f) Pack the bag and wadding in a corrugated paper box. Fill all voids with cellulosewadding or brown kraft paper, and seal the box.

(g) Write the fan nomenclature, part number and serial number on the box.

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8. FITS AND CLEARANCES

A. Assembly torque limits

Assembly torque limits are given in Table 10.

Table 10Assembly Torque Limits

IPL FIG. 1 ITEM

NUMBER

NOMENCLATURE TORQUE LIMITS

15 Nut, self-locking 240-260 in-lbs(28.8-31.2 Nm)

40, 70, 115 Screw 20-30 in-lbs(2.4-3.6 Nm)

55 Nut, self-locking 40-50 ft-lbs(57.6-72.0 Nm)

B. Assembly Fits

Select quantity of shims (30, IPL Fig. 1) to achieve dimension shown in Figure 3.

C. Service Wear Limits

Service wear limits for parts subject to wear are given in Table 11. Replace excessivelyworn parts.

Table 11

Fits and Clearances

IPL FIGURE 1ITEM NUMBER

ORIGINAL MANUFACTURINGLIMITS IN INCHES (CM)

DIMENSION

SERVICE WEAR LIMITS ININCHES (CM)

DIMENSION

MIN MAX MIN MAX

10 (ID) 0.2505 (0.6363) 0.2520 (0.6401) 0.2520(0.6401)

50 (max. dia.across blades)

8.400 (21.336) 8.403 (21.3436) 8.400(21.336)

50 (ID) 0.9845 (2.5006) 0.9850 (2.5019) 0.9850(2.5019)

85 (ID) 0.7495 (1.9037) 0.7505 (1.9063) 0.7505(1.9063)

85 (OD) 0.9839 (2.4991) 0.9841 (2.4996) 0.9839(2.4991)

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9. SPECIAL TOOLS, FIXTURES AND EQUIPMENT

The recommended special tools, fixtures and test equipment are given in Table 12.

Table 12Special Tools, Fixtures and Equipment

NOMENCLATUREPART OR

SPECIFICATIONNO.

SOURCE (CAGE)* USE

AC Electric Motor Commercially available TestingFlow Straightener Smiths Aerospace (V56231) Testing

Magnifier Commercially available Check Procedures

Manometer Commercially available Testing

Orifice Plate Smiths Aerospace (V56231) Testing

Piezometer Ring Smiths Aerospace (V56231) Testing

Tank, Compressed Air20 psig (140 kPag)

Commercially available Cleaning

Test Fixture Smiths Aerospace (V56231) TestingThread Chaser Commercially available Repair

Torque Meter Commercially available Testing

Torque Wrenches

0-100 in-lbs Commercially available Assembly

200-300 in-lbs Commercially available Assembly

40-50 ft-lbs Commercially available Assembly

Transition Piece Smiths Aerospace (V56231) Testing

* Refer to IPL, paragraph B, for address.

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10. ILLUSTRATED PARTS LIST (IPL)

A. Introduction

(1) Purpose

This IPL illustrates and lists authorized replacement parts.

(2) Instructions for Use of the IPL

(a) If the part number is known:

1. Find the part in the exploded-view illustration.

2. Refer to the parts list and find item number in the FIG. ITEM No. column.

(b) If the part number is not known:

1. Refer to the numerical index or parts list and find the part in the PARTNUMBER column.

2. Refer to the referenced figure and item number.

B. Vendor Codes

The CAGE codes for the manufacturers of the parts, materials, special tools, and testequipment referenced in this CMM are given below. The codes are from CatalogingHandbook H4/H8. In the IPL, no code indicates the part is manufactured by SmithsAerospace.

CAGE Name and Address

56231 Smiths Aerospace23695 Via Del RioYorba Linda, CA 92887-2715

C. Explanation of Detail Parts List Entries

The Detail Parts List is arranged in a general sequence of disassembly. The parts areillustrated in an exploded-view illustration and listed in the related parts list.

(1) FIG. ITEM NO. Column

(a) The first number at the top of each FIG. ITEM NO. column is the figure numberof the exploded-view illustration. The number given opposite each part numberis the item number assigned to the part on the illustration.

(b) A dash (-) in front of an item number means the part is not illustrated.

(c) Alpha-variants A through Z (except I and O) are assigned to item numbers whennecessary to identify added parts, alternate parts and service bulletin modifiedparts.

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(2) PART NUMBER Column

This column contains the manufacturer's part number for each part, asmodified to meet the requirements of ATA 200/2000. The modifications caninclude:

(a) Removal of blank spaces and special characters, with the possibleexception of dashes. Dashes are permitted only between numericcharacters.

(b) Insertion of a reference part number compatible with ATA 200/2000 if themanufacturers part number exceeds 15 characters. In these cases, themanufacturer's part number is given in the NOMENCLATURE column.

(3) NOMENCLATURE Column

(a) This column contains descriptive nomenclature for each part, and canalso give the manufacturer's CAGE code (if the part is not manufactured

by Smiths Aerospace), part number, (if longer than 15 digits or modified toATA 200/2000), service bul letins affecting the part, and obsolete partnumbers.

(b) The indenture system used in the NOMENCLATURE column indicates therelationship of one part of another, as follows:

123End Item of Major Assembly. Detail Parts for End Item or Major Assembly. SubassembliesATTACHING PARTS. Attaching parts of Subassemblies

***. . Detail parts of Subassemblies

ATTACHING PARTS. . Attaching parts for Detail Parts

***

(c) Assemblies , subassemblies, and detail parts subject to modificationdeletion, addition, or replacement by an issued service bulletin areannotated to indicate both pre-and post-service bulletin configurations.The term (PRE SB XXXX) in the NOMENCLATURE column designatesthe original configuration, and the term (POST SB XXXX) identifiesassemblies and parts after the modification has been completed.

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(d) The terms defined below are used when applicable to indicate theinterchangeability of parts.

Term Abbreviation Definition

Alternate ALT The part is alternate to and interchangeable withother parts within the same item number variantgroup or other item numbers if designated.

Superseded by SUPSD BY The part is superseded by and is notinterchangeable with the item numberdesignated in the notation.

Supersedes SUPSDS The part supersedes and is not interchangeablewith the item number designated in the notation.

Replaced By REPLD BY The part is replaced by and is interchangeablewith the item number designated in the notation.

Replaces REPLS The part replaces and is interchangeable withthe item number designated in the notation.

(4) EFF Code Column

This column contains effectivity codes (a, b, etc) to indicate models orconfiguration of the end item to which the parts apply. The column is left blankwhen the parts apply to all models or configurations in the parts list.

(5) UNITS PER ASSY Column

The quantity shown in this column represents the units required for one NHA or,when referring to attaching parts, the quantity to attach one such item. Theabbreviation RF (reference) means the end item or assembly is showncompletely assembled in the figure referenced in NOMENCLATURE column.

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IPL Figure 1. Shaft Driven Axial Fan, Exploded View

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FIG.ITEMNO.

PART NUMBERAIRLINEPART NO NOMENCLATURE

1234567EFF

CODE

UNITSPERASSY

1-30990 SHAFT DRIVEN AXIAL FAN A RF

-1 30990-1 SHAFT DRIVEN AXIAL FAN B RF

5 30276 . NAMEPLATE A 15 33498 . NAMEPLATE B 1

10 30274 . COUPLING 1ATTACHING PARTS

15 MS21043-5 . NUT, SELF-LOCKING 120 30298 . WASHER 1

- - -*- - -25 MS20066-1 . KEY 230 30299 . SHIM AR35 30525 . SEAL ASSEMBLY 1

ATTACHING PARTS40 NAS1351C3-8 . SCREW 5

45 NAS620C10 . WASHER 5- - -*- - -

50 30269 . IMPELLER 1ATTACHING PARTS

55 X20411 . LOCKNUT, BEAR HUG 160 30275 . WASHER 1

- - -*- - -65 30272 . SLEEVE 1

ATTACHING PARTS70 NAS1351C3-8 . SCREW 475 NAS620C10 . WASHER 4

- - -*- - -

80 X20102 . BALL BEARING 185 30271 . SHAFT 1ATTACHING PARTS

90 MS39086-244 . PIN 1- - -*- - -

95 30295 . SHAFT A 195 33499 . SHAFT B 1

100 X20412 . BEARING, NEEDLE 2105 30273 . SLEEVE 1110 30277 . PLATE, CLOSURE 1

ATTACHING PARTS115 NAS1351C3-8 . SCREW 4

120 NAS620C10 . WASHER 4- - -*- - -125 30293 . BEARING, BALL 1

ATTACHING PARTS130 30294 . PIN 1

- - -*- - -135 X20051 . SPRING, WAVE 1140 30265 . HOUSING, STATOR 1145 MS21209F1-15 . . INSERT 8

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Document No.: R-92-81-TB

INPUT FOR TECHNICAL BULLETIN

Date: March 18, 2004

Subject: Improvement of Bell Model 230 & 430 Series

helicopter Oil Cooler Blower part no.

230-365-001-101 (MAI P/N 44540-1) to 230-365-001-103 (MAI P/N 44540-2).

Background: Meggitt Airdynamics Inc. (formerly Howden Airdynamics, Inc) has improved part

no. 44540-1 blower assembly. The newly improved blower part no. is 44540-2.

Improvements were performed to enhance blower overload capability upon BellHelicopters request.

The oil cooler blower contains a torque overload shear section in the drive shaft. The

shear section was increased to provide higher overload torque capability. Possibility

of drive shaft shearing in normal operation is reduced with this improvement.

Blower air flow performance, form, fit, and function are not affected by the

enhancement. Fan input requirements are not affected.

Upgradeability: Existing 44540-1 blowers are capable of being upgraded to 44540-2 assemblies in

lieu of purchasing new blowers. Upgrade of existing units does not alter performance

characteristics, input requirements, or mounting configuration. Blower upgrade is

accomplished by installing repair kit part no. 44584-1 in accordance with overhaul

manual instructions. Upgrade may be performed at MAI or in the field.

Recommendation: Replacing the existing 44540-1 blower is not mandatory, but is recommended to

enhance overload torque capability. Replacement can be accomplished by upgrading

existing 44540-1 units or by installing new 44540-2 units.

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DOCUMENT: R-92-81MEGGITT AIRDYNAMICS REVISION: ACorona, California DATE: 2004/03/08

PAGE: i

REVISIONS

LTR DESCRIPTION DATE

N/C Initial release 1992/12/04

A Incorporate ECO 5401 2004/03/08

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PAGE: ii

TABLE OF CONTENTS

PAGE

1.0 PRODUCT 1

2.0 APPLICATION 1

3.0 MAINTENANCE REQUIREMENTS 14.0 IN-SERVICE INSPECTION 1

5.0 BEARING REPLACEMENT 2

5.1 Disassembly and Bearing Removal 25.2 Reassembly Procedures 3

6.0 PERFORMANCE VERIFICATION 3

7.0 RECOMMENDED SPARE PARTS 38.0 TOOLING 3

APPENDIX A Assembly Parts Breakdown

APPENDIX B Bearing Installation

APPENDIX C Assembly Instructions

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PAGE: 1

LOGISTICS SUPPORT PLAN

1.0 PRODUCT

a) Bell Helicopter Textron P/N 230-365-001-101

Meggitt Airdynamics, Inc. (MAI) P/N 44540-1

b) Bell Helicopter Textron P/N 230-365-001-103

Meggitt Airdynamics, Inc. (MAI) P/N 44540-2

2.0 APPLICATION

Model 230/430 Helicopter Transmission/Engine Oil Cooling Fan

3.0 MAINTENANCE REQUIREMENTS

The Fan Assembly requires only one maintenance action, which is replacement of the

sealed shaft bearings after 3000 hours of flight operation. See Section 5.0 for instructions

on removal and replacement of bearings.

4.0 IN-SERVICE INSPECTION

The Fan Assembly is considered "on-condition", except for the bearing replacement

outlined in para 5.0. The Fan Assembly should be visually inspected every 100 hours of

operation for obvious damage, failed shear section in drive shaft, excessive vibration, or

unusual noises.

During the 3000 hour refurbishment, the impeller and drive shaft shall be thoroughly

inspected for the following:

Impeller

Any indication of damage due to foreign objects being ingested into the Fan Assembly.

Any visible indications of cracks.

Erosion of blade tips which exceeds 50% of blade surface.

Excessive visible erosion of the impeller's leading or trailing edges.

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PAGE: 2

Drive Shaft

Inspect for cracks or impending failure using magnetic particle inspection.

The replacement of the impeller assembly requires performance testing and is considered a

supplier repair, therefore, the assembly should be returned to MAI for repair/replacement

and retesting.

Replacement of drive shaft requires reshimming of adapter to maintain a controlled

distance to inlet shroud.

5.0 BEARING REPLACEMENT

(Refer to Appendix A for Illustrated Parts Breakdown)

5.1

Disassembly and Bearing Removal

a) Restrict adapter (Item 12) from rotating using tool T10550, while loosening nut (Item

22). Remove nut and washer (Item 21), allowing adapter and shims (Items 26-28) to

slip off end of the drive (quill) shaft.

b) Remove the internal retaining ring (Item 15) with standard snap ring pliers. Drive shaft

(quill shaft, Item 11 or 34) and bearing assembly will now slide forward and can be

removed. Discard bearing (Item 14, QTY 1).

c) Remove four (4) screws (Item 24), and separate inlet housing (Item 1) from fan

housing.

d) Restrict impeller from rotating by inserting a wooden dowel between impeller blades

and housing vanes and loosen nut (Item 19). Remove nut, washer (Item 18), and

spacer (Item 5). Impeller/shaft assembly can now be removed by sliding assembly out

of the main bearings.

e) Remove and discard lockwire (reference Item 31) from either end of housing. Remove

screws (Items 23 & 17), retainers (Items 10 & 8), and slide bearings (Item 14, QTY 2)

from housing. Discard bearings.

f) Remove all grease and clean parts prior to re-assembly.

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PAGE: 3

5.2 Reassembly Procedures

Reassemble per instructions noted in Appendix C.

6.0 PERFORMANCE VERIFICATION

Install the Fan Assembly on a test stand capable of providing 10 Hp at 9545 RPM.

Support the housing at the mounting flange with an aluminum adapter during testing.

Rotate the fan by hand CCW viewed from inlet to determine if there is any interference

with the housing or excessive bearing drag or noise. Slowly accelerate the fan to 9000

500 RPM (less than 5,000 RPM/min). Fast acceleration will fail the shear section. Assure

there is no abnormal audible noise (grinding) or vibration (oscillations). Operate for 3

minutes.

7.0 RECOMMENDED SPARE PARTS

Qty/Fan Assy Part Number Description

3 400-012-057 Bearing

AR MIL-G-81322 Mobil 28 Grease

2 44525-1 Shim

2 44525-2 Shim2 44525-3 Shim

AR MS20995C20 Lockwire

144557-1 (for 44540-1)

46453-1 (for 44540-2)Drive Shaft

8.0 TOOLING

T-10549 Shaft Support

T-10550 Holding Fixture

10 Hp, 10,000 RPM, Drive Motor with Test Stand

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PAGE: Appendix A

APPENDIX A

Assembly Parts Breakdown

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PAGE: A-1

ASSEMBLY PARTS BREAKDOWN

FAN, VANEAXIAL, P/N 44540-1 and 44540-2

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PAGE: A-2

PARTS LIST: 44540-1 and 44540-2

Quantity

Assy -2

Quantity

Assy -1Item No.

Part or

Identifying No.Nomenclature or Description

--- A --- 44540-1 Fan Assembly

A --- --- 44540-2 Fan Assembly

1 1 1 44545-1 Inlet Housing Assembly

1 1 2 44546-1 Outlet Diffuser Housing Assembly

1 1 3 44547-1 Impeller

1 1 4 44548-1 Shaft, Main

1 1 5 44549-1 Spacer

1 1 6 44552-1 Spacer

1 1 7 44553-1 Spacer

1 1 8 44554-1 Bearing Retainer1 1 9 44555-1 Bearing Liner

1 1 10 44556-1 Bearing Retainer

--- 1 11 44557-1 Shaft, Drive (Quill Shaft)

1 1 12 44558-1 Shaft Adapter

1 1 13 44559-1 Bearing Liner

3 3 14 400-012-057 Bearing

1 1 15 MS16625-4165 Retaining Ring

1 1 16 NAS558P606-16 Key

6 6 17 NAS1351-3H8P Screw, Socket Head

1 1 18 44573-1 Washer, Retaining

1 1 19 44572-1 Nut, Retaining1 1 20 MS29513-012 Packing, Preformed

1 1 21 44389-1 Washer

1 1 22 MS21083C7 Nut

3 3 23 NAS1351-3H6P Screw, Socket Head

4 4 24 MS51960-66 Screw

1 1 25 NAS558P606-10 Key

AR AR 26 44525-1 Shim (.003 thick)

AR AR 27 44525-2 Shim (.005 thick)

AR AR 28 44525-3 Shim (.010 thick)

1 1 29 400-218-030 Spring, Wave

--- 1 30 43402-1 Nameplate

AR AR 31 MS20995C20 LockwireAR AR 32 400-500-013 Threadlocker, Loctite 242

AR AR 33 MIL-G-81322 Grease, Mobil 28

1 --- 34 46453-1 Shaft, Drive (Quill Shaft)

1 --- 35 43402-2 Nameplate

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PAGE: Appendix B

APPENDIX B

Bearing Installation

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PAGE: B-1

1.0 SCOPE

This specification covers the general requirements for installing and handling ball bearingsused in P/N 44540-1 and 44540-2 vaneaxial blowers.

2.0 HANDLING

2.1 Cleanliness

Small amounts of contamination can ruin bearings quickly, so precautions must be taken to

keep bearings clean during the manufacturing processes.

2.1.1 Containers

Bearings should be left in the protective containers or wrapping as long as possible. Do

not store unwrapped bearings in work or stockroom areas.

2.1.2 Work Area

Work benches and other areas used for installing bearings should be cleaned just before

beginning to install bearings. Remove "dust makers" such as shop cloths, dusty papers,

etc. Do not use air blowers near work areas when bearings are being installed, use only

"lint free" wipers.

2.2

Using Force

Always use extreme caution when applying force to get a bearing into or out of an

assembly. Always apply force to the race being assembled; that is, push on the inner race

to place bearing on a shaft and push on the outer race to place bearing in a bearing bore.

NEVER HIT, POUND, HAMMER, or otherwise shock a bearing with force applied across

the ball train. This will dent the balls and races and ruin the bearing. If force must be

applied across the ball train during assembly, it must not exceed a light hand push. When

mechanical force across the ball train, such as a bearing puller or arbor press, must be usedto disassemble a bearing, the bearing so affected shall be discarded. Discarded bearings

shall be marked and handled in a manner to ensure that they will not be re-used in

assemblies.

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2.3 Anti-Fret

2.3.1 Material

Use MIL-G-81322 (Item 33, Mobil 28) grease as an anti-fret lubricant.

2.3.2 Application

Wipe a thin film of Mobil 28 grease onto the surface of the housing bore before installing

bearings. Use this on all greased bearings at the time of assembly.

2.3.3 Looseness

If installed bearings seem unusually loose in bores or on shafts, check bearing and part

dimensions.

2.4

Orientation

Always refer to the assembly print for proper installation. Some bearings have preferential

direction and will fail if installed backwards.

2.4.1 Identification

Unless otherwise designated on the assembly drawing, all ball bearings shall be installed

with the manufacturers identification markings facing toward the shoulder of the shaft.

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