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TASK 72-58-40-300-803
1 . Repair for the Mid Fan Shaft.
A.This procedure gives instructions to repair the mid fan shaft (shaft) by replacing the damaged aluminum protective paint. Refer to Figure 901.
NOTE:
Before you do this procedure, you must complete S/B 72-0114 for part number 2332M81G01   .
NOTE:
Protective paint and solid film lubricant must be removed before the shaft piece part inspection.
NOTE:
When you replace aluminum protective paint of 2332M81G05   , 2332M91G01   , 2332M91G02   , 2440M20G05   , 2440M91G05   , or 2440M91G06   , refer to TASK 72-58-40-300-812 (72-58-40, REPAIR 013) . Do not do this task except for the procedures of this task that are referred in TASK 72-58-40-300-812 (72-58-40, REPAIR 013) .
B.The subsequent table gives a list of the part numbers that are applicable to this repair. All part numbers are applicable to all paragraphs unless specified differently.
 
Part Number(s)
 
2331M20G02  
2331M20G03  
2332M81G01  
2332M81G03  
 
2332M81G04  
2332M81G05  
2332M91G01  
2332M91G02  
 
2440M20G05  
2440M91G05  
2440M91G06  
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C.Proprietary/Complex Process Statement.
(1)None.
2 . Tools, Equipment, and Materials.
NOTE:
Repair sources can use equivalent alternatives for tools, equipment, and consumable materials, however, the repair source must demonstrate and document equivalency.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment.
 
Description
Manufacturer
 
Spray Gun (Devilbiss Luna series or Devilbiss Model MBC)
ITW Industrial Finishing Binks,
Devilbiss
195 International Blvd.
Grendale Heights, IL 60139 USA
Phone: 800 338 4448
Fax: 800 368 0117
 
Spray Gun (Iwata W series)
Anest Iwata Corporation
3176, Shinyoshida-cho, Kohoku-ku,
Yokohama, 223-8501 Japan
Phone: +81-45-591-1111
 
Spray Gun (Meiji series)
Meiji Air Compressor Mfg. Co., Ltd.
3-14,2-chome
Tagawa, Yodogawa-Ku
Osaka 532-0027, Japan
Phone: +81-6-6309-1227
FAX : +81-6-6309-0157
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C03-038
Paint, Sermetel
 
C03-039
Paint, Sermetel, Touch-up (touch-up paint)
 
C10-012
Tape, Masking, High Temperature (masking tape)
 
C10-021
Tape, Plastic
 
C10-049
Abrasive, Grit, Aluminum Oxide (180 mesh grit)
 
C10-067
Tape, Platers
 
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Sermetel WFX-2
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-00
Chemical Cleaning
 
70-21-03
Cleaning Method No. 3 - Steam Cleaning
 
70-23-00
Stripping Procedures
 
70-23-02
Stripping Method No. 2 - Stripping Inorganic Bonded Aluminum Paint
 
70-43-05
Inorganic Aluminum Protective Coating
 
70-43-09
Replacement of Dry-Film Lubricant
 
72-58-00
Storage 001
 
72-58-40
Repair 001
 
72-58-40
Repair 003
 
72-58-40
Repair 004
 
72-58-40
Repair 013
D.Expendable Parts. None.
E.SPD Information. None.
(1)Locally Manufactured SPD. None.
F.Special Solutions. None.
G.Test Specimens. None.
3 . Dimensional Information.
Subtask 72-58-40-220-087
A.Refer to Figure 901 and Figure 902 for specified dimensions and locations.
NOTE:
The dimensional data identified within this procedure was designed using millimeters as the base unit of measurement for dimensional values. The conversion to inches is rounded to two additional decimal digits than millimeters. For minimum dimensions, converted values are rounded up. For maximum dimensions, converted values are rounded down. To avoid conversion errors, do not reconvert from inches to millimeters.
NOTE:
Reference dimensions do not require inspection.
4 . Setup Information.
None.
5 . Procedure
Subtask 72-58-40-100-004
CAUTION:
MAKE SURE THAT YOU REPLACE THE ALUMINUM PROTECTIVE PAINT IN THE SPECIFIED TIME PERIOD OR DO THE STORAGE PROCEDURES TO PREVENT CORROSION IN THE SHAFT.
A.Remove the aluminum protective paint from the shaft. Refer to TASK 70-23-00-100-001 (STRIPPING PROCEDURES), TASK 70-23-02-110-019 (STRIPPING METHOD NO. 2 - STRIPPING INORGANIC BONDED ALUMINUM PAINT), and as follows:
(1)If necessary, apply C10-021  plastic tape to adjacent surfaces where stripping is not necessary.
Subtask 72-58-40-300-004
B.Remove all the solid film lubricant from the shaft. Refer to TASK 72-58-40-300-804 (72-58-40, REPAIR 003).
Subtask 72-58-40-300-005
C.If necessary, remove the shank nuts from the shaft. Refer to TASK 72-58-40-300-802 (72-58-40, REPAIR 004).
Subtask 72-58-40-350-021
D.Make sure that you complete all the inspections and repairs necessary for the shaft before you continue with this procedure.
Subtask 72-58-40-100-005
E.If necessary, clean the shaft. Refer to TASK 70-21-00-110-051 (CHEMICAL CLEANING), and TASK 70-21-03-160-001 (CLEANING METHOD NO. 3 - STEAM CLEANING).
Subtask 72-58-40-380-006
WARNING:
REFER TO THE PRODUCT LABEL AND THE MANUFACTURER’S (MATERIAL) SAFETY DATA SHEET FOR INSTRUCTIONS ON THE HAZARDS, STORAGE, SAFE HANDLING AND PROPER USE OF THIS PRODUCT.
F.Surface-treat the shaft. Refer to TASK 70-43-05-380-005 (INORGANIC ALUMINUM PROTECTIVE COATING), and as follows:
NOTE:
Spray gun (Iwata W series, Devilbiss Luna series, Meiji series or Devilbiss Model MBC) can be used as an alternative to the spray gun approved in TASK 70-43-05-380-005 (INORGANIC ALUMINUM PROTECTIVE COATING).
(1)Apply C10-012  masking tape, C10-067  platers tape, or equivalent masking methods to area CA, area EM, area DG, area DQ, area DJ, area DR, datum B, and all the markings on the shaft. Refer to Figure 901 and Figure 902.
CAUTION:
DO NOT REMOVE MORE THAN 0.00098 INCH (0.025 MM) OF PARENT MATERIAL. DAMAGE TO THE PART CAN OCCUR.
(2)Surface-treat the shaft to prepare the shaft surface for protective coating. Refer to TASK 70-43-05-380-005 (INORGANIC ALUMINUM PROTECTIVE COATING), and as follows:
(a)Use C10-049  180 mesh grit.
(3)Replace the masking, if necessary, after the shaft surface preparation.
(4)Apply C03-038  sermetel paint or sermetel WFX-2 to all the shaft area. Do not include area CA, area EM, area DG, area DQ, area DJ, area DR, datum B, and all the markings on the shaft.
NOTE:
Datum B is the support diameter for balance measurement, thus aluminum protective paint must not be applied to datum B before the balance measurement.
(5)Make sure that you apply the paint to the shaft in a period of 2 hours after grit blast.
(6)If necessary, replace masking between coats.
(7)Bare metal, on the coating area of the shaft with aluminum protective paint, is not permitted.
Subtask 72-58-40-300-006
G.Apply solid film lubricant to the shaft. Refer to TASK 72-58-40-300-804 (72-58-40, REPAIR 003).
Subtask 72-58-40-640-003
H.Apply lubricant to the shaft shank nuts that you did not replace. Refer to TASK 70-43-09-640-001 (REPLACEMENT OF DRY-FILM LUBRICANT).
Subtask 72-58-40-300-007
I.If necessary, install the new shank nuts on the shaft. Refer to TASK 72-58-40-300-802 (72-58-40, REPAIR 004).
Subtask 72-58-40-300-008
J.Deleted.
Subtask 72-58-40-380-007
K.Surface-treat the shaft to touch-up the aluminum protective coating. Refer to TASK 70-43-05-380-005 (INORGANIC ALUMINUM PROTECTIVE COATING), and as follows:
(1)Use only the C03-039  touch-up paint and the touch-up procedure.
(2)If necessary, apply C10-021  plastic tape, C10-067  platers tape, or equivalent masking methods to adjacent surfaces where C03-039  touch-up paint is not necessary.
(3)Prepare the shaft surface as described in TASK 70-43-05-380-005 (INORGANIC ALUMINUM PROTECTIVE COATING).
(4)Apply the necessary thickness or number of coatings of C03-039  touch-up paint to the shaft areas that follows:
(a)Datum B: three coats.
(b)The protective paint areas of the shaft where touch-up is necessary: three coats.
(c)All marking areas of the shaft: as thin as possible to let you read the markings.
(5)Overlap with adjacent painted surfaces of the shaft is necessary. Bare metal is not permitted.
Subtask 72-58-40-550-001
L.If you will not assemble the shaft immediately, do the correct storage procedure to prevent corrosion in the shaft. Refer to TASK 72-58-00-550-801 (72-58-00, STORAGE 001).
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Figure 901   (Sheet 1 ) Mid Fan Shaft
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Figure 901   (Sheet 2 ) Mid Fan Shaft
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Figure 901   (Sheet 3 ) Mid Fan Shaft
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Figure 901   (Sheet 4 ) Mid Fan Shaft
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Figure 901   (Sheet 5 ) Mid Fan Shaft
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Figure 902   Mid Fan Shaft - Dimensional Information