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TASK 72-58-00-030-801
1 . General.
A.This procedure gives instructions to disassemble the mid fan shaft assembly for PRE SB 72-0040 engines (with or without SB 72-0114 applied to PRE SB 72-0040 engines). Refer to Figure 501.
Mid fan shaft assembly:
•
(45-010 , 72-00-02) (SIN 81000)
•
(45-010A , 72-00-02) (SIN 81000) (SB 72-0114).
Mid fan shaft:
•
(01-010) (SIN 810A0)
•
(01-010A) (SIN 810A0) (SB 72-0114)
•
Deleted
•
Deleted
•
Deleted
•
(01-013) (SIN 810A0) (SB 72-0319).
NOTE:
For SB 72-0040 engines refer to TASK 72-58-00-030-802 (72-58-00, Disassembly 001 Configuration 02) .
B.The mid fan shaft assembly (45-010 , 72-00-02) is installed on the 11C3605   mid fan shaft truck with the 11C3597   shaft holder. Refer to Figure 502 and TASK 72-00-04-030-801 (72-00-04, Disassembly 001) .
C.The balance bolts on the aft flange must not be removed.
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools.
 
Tool No.
Description
 
11C3296P01
Protector, Thread/Spline - LPT Shaft, Forward (thread/spline protector)
 
11C3597G01
Truck, Shaft - A/O Mid Shaft (shaft holder)
 
11C3598G01
Fixture, Run-On Torque (torque fixture)
 
11C3599G01
Fixture, Install Support Assembly (support assembly install fixture)
 
11C3600G01
Fixture, Lift - Shaft Module Assembly, Mid (mid fan shaft lift fixture)
 
11C3601G05
Tool, Install/Remove Support Assembly (install/remove tool)
 
11C3602G04
Tool, Tilt Support Assembly (tilt tool)
 
11C3603G01
Adapter, Tool - Shaft Mid Fan (tool adapter)
 
11C3604G01
Wrench, Tube Center Vent (center vent wrench)
 
11C3605G01
Truck, Shaft Mid Fan (mid fan shaft truck)
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials. None.
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-06
Cleaning Method No. 6 - Heavy-Duty Alkaline Cleaner (Without Inhibited Phosphoric Acid)
 
72-00-04
Low Pressure Turbine Module Assembly - Disassembly 001
 
72-58-00
Mid Fan Shaft - Storage 001
D.Expendable Parts. None.
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Figure 501   (Sheet 1 ) Mid Fan Shaft Assembly
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Figure 501   (Sheet 2 ) Mid Fan Shaft Assembly
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Figure 502   (Sheet 1 ) Installation of the Mid Fan Shaft to the Mid Fan Shaft Truck, 11C3605
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Figure 502   (Sheet 2 ) Installation of the Mid Fan Shaft to the Mid Fan Shaft Truck, 11C3605
3 . Procedure.
Subtask 72-58-00-030-002
A.Remove the center vent tube (01-020) (SIN 810A1) from the mid fan shaft as follows:
CAUTION:
THE PLATES (ITEM 13) MUST REMAIN EXTENDED TO THE FLOOR AT ALL TIMES EXCEPT WHEN NECESSARY TO MOVE THE STAND. THE STAND CASTERS DO NOT PROVIDE SUFFICIENT STABILITY TO ALLOW SAFE WORKING CONDITIONS.
(1)The plates (item 13) of the 11C3605   mid fan shaft truck must touch the floor to prevent movement of the shaft truck. Refer to Figure 502.
(2)Remove the 11C3296   thread/spline protector from the mid fan shaft.
(3)Install the 11C3604   center vent wrench to the mid fan shaft assembly (45-010 , 72-00-02) as follows. Refer to Figure 503.
(a)Install the sleeve (item 3) so the keys (item 4) engage with the slots of the center vent tube (01-020).
(b)Install the holder (item 2) in the threads of the mid fan shaft. Manually tighten the holder with the rod (item 5).
(4)Turn the sleeve (item 3) counterclockwise (CCW) with a breaker bar or equivalent to loosen the center vent tube (01-020).
(5)Remove the 11C3604   center vent wrench.
(6)Carefully pull the center vent tube (01-020) forward out of the mid fan shaft.
(7)Remove and discard the performed packing (01-090) (SIN 810N4), three preformed packings (01-080) (SIN 810N0), and the four locking inserts (01-070) (SIN 810K0) from the center vent tube (01-020). Refer to Figure 504.
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Figure 503   Removal of the Center Vent Tube with the Center Vent Wrench, 11C3604
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Figure 504   (Sheet 1 ) Disassembly of the Mid Fan Shaft
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Figure 504   (Sheet 2 ) Disassembly of the Mid Fan Shaft
Subtask 72-58-00-030-003
B.Attach the 11C3605   mid fan shaft truck to the 11C3601   install/remove tool as follows. Refer to Figure 505.
(1)If the mid fan shaft is dirty with heavy coking that prevents the removal of the center vent tube, clean the mid shaft assembly as follows:
Subtask 72-58-00-160-001
(a)Alternative Procedure Available. Clean the mid fan shaft assembly. Refer to TASK 70-21-06-110-004 (CLEANING METHOD NO. 6 - HEAVY-DUTY ALKALINE CLEANER (WITHOUT INHIBITED PHOSPHORIC ACID)), and as follows:
1Discard and replace the round nut after you clean the mid fan shaft.
NOTE:
The round nut can not be used after this cleaning, because cleaning method No. 6 has an adverse impact on the locking insert (vespel) of the round nut.
Subtask 72-58-00-160-002
(a).A.Alternative Procedure. Clean the mid fan shaft assembly. Contact GE for OEM approved cleaning procedure.
Subtask 72-58-00-030-028
(2)Lift the support (item 24) and hold it in the vertical position with the bolt (item 49) and nut (item 51).
(3)Put the tube assembly of the 11C3601   install/remove tool on the support (item 24).
(3).A.Tighten the clamp lever (item 59).
(4)Align the 11C3605   mid fan shaft truck with the 11C3601   install/remove tool.
(5)Adjust the height of the base (item 22) of the 11C3601   install/remove tool to the 11C3605   mid fan shaft truck with the hand wheels (item 29). Keep the base horizontal.
(6)Level the 11C3605   mid fan shaft truck to the 11C3601   install/remove tool.
(7)Attach the 11C3605   mid fan shaft truck to the 11C3601   install/remove tool with the stopper (item 32) and the bolts (item 48).
(8)Hold the 11C3605   mid fan shaft truck to the floor with the handles (item 10) so the base (item 2) of the 11C3605   mid fan shaft truck is horizontal. Refer to Figure 502.
(9)Deleted.
(10)Deleted.
(11)Make sure that the axis of the tube assembly aligns with the axis of the mid fan shaft on the 11C3605   mid fan shaft truck. If necessary, adjust the height of the tube assembly with the arm handle-A (item 12) and arm handle-B (item 35). Refer to Figure 505.
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Figure 505   (Sheet 1 ) Install/Remove Tool, 11C3601
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Figure 505   (Sheet 2 ) Install/Remove Tool, 11C3601
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Figure 505   (Sheet 3 ) Install/Remove Tool, 11C3601
Subtask 72-58-00-030-004
C.Attach the 11C3603   tool adapter to the aft end of the mid fan shaft with the cap screws (item 4), washers (item 7), and nuts (item 6). Refer to Figure 506.
Subtask 72-58-00-030-014
D.Install the 11C3601   install/remove tool to the 11C3603   tool adapter as follows. Refer to Figure 505.
(1)Deleted.
(2)Deleted.
(3)Move the support-B (item 14) forward and install it to the 11C3603   tool adapter.
(4)Remove the bolt (item 49) and the nut (item 51) and put the support (item 24) down in the forward direction.
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Figure 506   Installation of the Tool Adapter, 11C3603
Subtask 72-58-00-030-005
E.Remove the aft support ring assembly from the mid fan shaft. Refer to Figure 505 and do as follows:
NOTE:
The aft support ring assembly includes the threaded sleeve (01-030), round nut (01-040), and support ring (01-050).
(1)Loosen the round nut (01-040) of the aft support ring assembly with the 11C3601   install/remove tool as follows:
(a)Turn the hand knob (item 3) CCW to retract the swing clamps (item 18).
(b)Carefully insert the anti-torque tube (item 15) into the mid fan shaft from the aft end.
(c)Align the slots in the plug nose (item 19) with the tabs of the threaded sleeve (01-030).
NOTE:
The anti-torque tube (item 15) can be turned to align the slots of the plug nose (item 19) with the tabs of the threaded sleeve (01-030).
(d)Carefully push the anti-torque tube (item 15) until the tabs of the threaded sleeve (01-030) fully engage with the slots in the plug nose (item 19).
(e)Turn the hand knob (item 3) clockwise to open the swing clamps (item 18) so the threaded sleeve (01-030) is held on the plug nose (item 19).
(f)Align the tabs of the round nut (01-040) (SIN 810A4) with the slots in the adapter (item 147).
NOTE:
The wrench tube (item 143) can be turned to align the slots of the adapter (item 147) with the tabs of the round nut (01-040) (SIN 810A4).
(g)Carefully push the wrench tube (item 143) until the tabs of the round nut (01-040) (SIN 810A4) fully engage with the slots in the adapter (item 147).
(h)Tighten the anti-torque tube lock screw on the ETP bush (item 44) to hold the anti-torque tube (item 15).
(i)Install a breaker bar or an equivalent in the wrench square of the wrench (item 144).
(j)Turn the wrench (item 144) CCW to loosen the round nut (01-040) (SIN 810A4).
(k)Loosen the anti-torque tube lock screw on the ETP bush (item 44).
(l)Turn the anti-torque tube (item 15) manually to make sure that the aft support ring assembly is free in the mid fan shaft.
1If necessary, do the above steps again until the aft support ring assembly can turn freely in the mid fan shaft.
(2)Carefully move the tube assembly aft until the aft support ring assembly comes out of the mid fan shaft.
(3)Remove the aft support ring assembly from the 11C3601   install/remove tool as follows:
(a)Turn the hand knob (item 3) CCW to retract the swing clamps (item 18).
(b)Remove the aft support ring assembly from the plug nose (item 19).
Subtask 72-58-00-030-006
F.Remove the mid support ring assembly from the mid fan shaft. Refer to aft support ring assembly removal procedure in Subtask 72-58-00-030-005 (paragraph 3.E.).
NOTE:
The mid support ring assembly includes the threaded sleeve (01-030), the round nut (01-040), and the support ring (01-050).
Subtask 72-58-00-030-007
G.Remove the forward support ring assembly from the mid fan shaft. Refer to Subtask 72-58-00-030-005 (paragraph 3.E.) and do as follows:
NOTE:
The forward support ring assembly includes the threaded sleeve (01-030), the round nut (01-040), and the support ring (01-060).
(1)Loosen the round nut (01-040) of the forward support ring assembly with the 11C3601   install/remove tool.
(2)Hold the forward support ring assembly with the 11C3599   support assembly install fixture as follows. Refer to Figure 507.
(a)Insert the 11C3599   support assembly install fixture from the forward end of the mid fan shaft.
(b)Operate the balance crank (item 25) to hold the sides of the forward support ring assembly with the jaws (item 11).
(3)Remove the 11C3601   install/remove tool from the mid fan shaft. Refer to Figure 505 and do as follows:
(a)Turn the hand knob (item 3) CCW to retract the swing clamps (item 18).
(b)Move the tube assembly aft until the plug nose (item 19) comes out of the mid fan shaft.
(c)Remove the support-B (item 14) from the 11C3603   tool adapter.
(d)Remove the clamp lever (item 59) and remove the tube assembly.
(4)Install the 11C3602   tilt tool on the forward support ring assembly in the mid fan shaft. Refer to Figure 508 and do as follows:
(a)Install the guide tube B (item 5) into the 11C3603   tool adapter.
(b)Turn the holder (item 14) to the horizontal position as follows:
1Loosen the knobs B (item 10) so knobs A (item 9) can move.
2Turn the holder (item 14) into the horizontal position with knobs A (item 9).
3Put the forward slots of the 11C3602   tilt tool at the 12:00 and 6:00 o'clock positions.
4Tighten the knobs B (item 10) and hold the holder (item 14) in the horizontal position.
(c)Install the 11C3602   tilt tool in the inner diameter of the guide tube B (item 5) with the bolts (item 18).
(d)Move the 11C3602   tilt tool forward and install the holder (item 14) in the support assembly.
(5)Remove the 11C3599   support assembly install fixture from the mid fan shaft.
(6)Turn the forward support ring assembly to the vertical position as follows. Refer to Figure 508.
(a)Loosen the knobs B (item 10) so knobs A (item 9) can move.
(b)Turn the holder (item 14) into the vertical position with knobs A (item 9).
NOTE:
The forward support ring assembly will not go out of the mid fan shaft if the forward support ring assembly is in the horizontal position.
(c)Tighten knobs B (item 10) and hold the holder (item 14) in the vertical position.
(7)Remove the 11C3602   tilt tool as follows:
(a)Remove the bolts (item 18) and remove the 11C3602   tilt tool from the guide tube B (item 5).
(b)Remove the guide tube B (item 5) from the 11C3603   tool adapter.
(8)Remove the forward support ring assembly from the 11C3602   tilt tool.
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Figure 507   Support Assembly Install Fixture, 11C3599
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Figure 508   Tilt Tool, 11C3602
Subtask 72-58-00-030-030
H.Lift the support (item 24) of the 11C3601   install/remove tool.
Subtask 72-58-00-030-031
I.Remove the support-B (item 14) of the 11C3601   install/remove tool from the 11C3603   tool adapter.
Subtask 72-58-00-030-009
J.Remove the 11C3603   tool adapter from the mid fan shaft.
Subtask 72-58-00-030-010
K.Disassemble each of the support assemblies with the 11C3598   torque fixture as follows. Refer to Figure 509.
(1)Attach the base (item 5) to a worktable.
(2)Remove the sleeve (item 3), the socket (item 2), the set block (item 4), and the cap screw (item 6) from the base (item 5).
(3)Put the support assembly on the base (item 5) with the support ring (01-050) down.
(4)Align the slots of the set block (item 4) with the two tabs of the threaded sleeve (01-030). Install the set block on the base (item 5) with the cap screw (item 6).
(5)Align the slots of the socket (item 2) with the tabs of the round nut (01-040). Install the socket on the round nut.
(6)Install the sleeve (item 3) over the socket (item 2).
(7)Loosen and remove the round nut (01-040).
(8)Remove the support ring (01-060) and threaded sleeve (01-030) from the 11C3598   torque fixture.
Subtask 72-58-00-030-015
L.Do the preservation procedure for all of the unpainted surfaces of the mid fan shaft. Refer to TASK 72-58-00-550-801 (72-58-00, STORAGE 001).
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Figure 509   Torque Fixture, 11C3598
Subtask 72-58-00-030-013
M.If necessary, remove the mid fan shaft from the 11C3605   mid fan shaft truck with the 11C3600   mid fan shaft lift fixture as follows:
(1)Attach the 11C3600   mid fan shaft lift fixture to the mid fan shaft. Refer to Figure 510 and do as follows:
NOTE:
All parts of the 11C3600   mid fan shaft lift fixture must be in serviceable condition before the use of this tool.
(a)Remove the slings (item 3) from the safety hooks (item 4).
(b)Attach the slings (item 3) at two locations to the mid fan shaft. Double the sling straps around the shaft.
(c)Attach an overhead hoist to the spreader bar (bar) (item 2) at two locations.
WARNING:
ALWAYS USE APPROVED EQUIPMENT AND PROCEDURES TO LIFT PARTS. STAY OUT FROM BELOW LOADS. IF THE PARTS ACCIDENTALLY MOVE OR FALL, THEY CAN CAUSE AN INJURY OR KILL YOU.
(d)Lift the bar (item 2) with an overhead hoist and attach the slings (item 3) to the safety hooks (item 4).
(e)Remove unwanted slack from the slings (item 3) with the overhead hoist.
(2)Remove the mid fan shaft from the 11C3605   mid fan shaft truck. Refer to Figure 502.
(a)Loosen the nuts (item 28) at two locations and remove the upper plates (item 15) from the mid fan shaft and the lower plates (item 143).
CAUTION:
BEFORE YOU LIFT THE FAN MID SHAFT ASSEMBLY, MAKE SURE THE SLING STRAPS ARE DOUBLED AROUND THE SHAFT AND IN THE CORRECT POSITION ON THE FAN MID SHAFT ASSEMBLY FOR GOOD BALANCE. THE FAN MID SHAFT ASSEMBLY COULD FALL FROM THE SLING STRAPS AND CAUSE INJURY TO PERSONS IF IT IS NOT INSTALLED CORRECTLY.
(b)Carefully lift the mid fan shaft from the 11C3605   mid fan shaft truck.
(3)Safely store the mid fan shaft.
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Figure 510   Installation of the Mid Fan Shaft Lift Fixture, 11C3600, to the Mid Fan Shaft