* * * FOR ALL
TASK 72-00-03-040-802
1 . General.
A.This procedure gives instructions to disassemble the lower bifurcation assembly (25-010 , 72-00-00) (SIN 09400) or (25-011 , 72-00-00) (SIN 09400). Refer to Figure 501.
B.This procedure begins with the lower bifurcation assembly installed in the 11C3251   installation fixture, at the equivalent disassembly status of TASK 72-00-03-020-802 (LOWER BIFURCATION ASSEMBLY - REMOVAL) . Refer to Figure 502.
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
 
11C3251G01
Fixture, Installation - Lower Bifurcation Assembly (installation fixture)
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials. None.
C.Referenced Procedures.
 
ATA No.
Description
 
72-00-03
Lower Bifurcation Assembly - Removal
D.Expendable Parts. None.
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* * * PRE SB   73-0060( Old Design for W30 and W31 Harnesses )
Figure 501   (Sheet 1 ) Disassembly of the Lower Bifurcation Assembly
* * * FOR ALL
* * * SB   73-0060( W30 and W31 Redesigned Harnesses )
* * * PRE SB   72-0444
Figure 501   (Sheet 2 ) Disassembly of the Lower Bifurcation Assembly
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* * * SB   73-0060( W30 and W31 Redesigned Harnesses )
* * * SB   72-0444
Figure 501   (Sheet 3 ) Disassembly of the Lower Bifurcation Assembly
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Figure 501   (Sheet 4 ) Disassembly of the Lower Bifurcation Assembly
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Figure 502   Installation of the Lower Bifurcation Assembly on the Installation Fixture, 11C3251
3 . Procedure.
Subtask 72-00-03-040-016
A.Remove the caps and the couplings from the manifold plate as follows. Refer to Figure 501.
(1)If necessary, rotate the lower bifurcation assembly in the 11C3251   installation fixture as follows. Refer to Figure 502.
CAUTION:
MAKE SURE THAT THE SWIVEL CASTERS REMAIN LOCKED AT ALL TIMES UNLESS YOU MOVE THE INSTALLATION FIXTURE. THE SWIVEL CASTERS DO NOT GIVE SUFFICIENT STABILITY TO PERMIT SAFE WORKING CONDITIONS.
(a)Make sure that the swivel casters (item 17) are in the locked (down) position and touch the floor.
(b)Make sure that the hook and loop straps (item 20) are safely attached.
(c)Pull on the spring plunger (item 15) to unlock the rotation plate (item 3).
(d)Carefully turn the rotation plate (item 3) to a position that lets you disassemble the bifurcation assembly.
(e)Re-insert the spring plunger (item 15) to lock the rotation plate (item 3).
(2)Remove the safety cable from the manifold plate.
(3)Remove the caps.
(4)Loosen the B-nuts and hex nuts and remove the couplings and nuts.
Subtask 72-00-03-040-017
B.Remove the lower bifurcation firewall (firewall) as follows:
(1)Remove the bolts that attach the firewall to the lower bifurcation forward manifold (forward manifold).
(2)Remove the firewall from the forward manifold.
Subtask 72-00-03-040-019
C.Remove the lower bifurcation fill and overfill manifold (fill and overfill manifold) as follows:
Subtask 72-00-03-040-027
* * * SB   73-0060( W30 and W31 Redesigned Harnesses )
(1)Remove the W31 electrical harness support bracket (bracket) (30-250 , 72-00-00) (SIN 0971J), harness W30 support bracket (bracket) (01-090 , 73-21-66) (SIN 9901U), and harness W31 support bracket (bracket) (05-100 , 73-21-66) (SIN 9901T) as follows:
NOTE:
PRE SB 73-0060 does not use this step. SB 73-0060 introduces these three new brackets.
(a)Remove the machine bolts (bolts) (01-300) (SIN 99022) and bolts (01-310) (SIN 99024) that attach the fill and overfill manifold (01-030) (SIN 99004) to the drain manifold (01-020) (SIN 99001) and left-side cable shield (01-040) (SIN 09710).
(b)Remove the machine bolts (bolts) (01-100 , 73-21-66) (SIN 9902H) and (05-110 , 73-21-66) (SIN 9902H) that attach the brackets (01-090 , 73-21-66) (SIN 9901U) and (05-100 , 73-21-66) (SIN 9901T) to the fill and overfill manifold (01-030) (SIN 99004).
(c)Remove the bolt (01-300) (SIN 99022) that attach the bracket (30-250 , 72-00-00) (SIN 0971J) to the left-side cable shield (01-040) (SIN 09710), drain manifold (01-020) (SIN 99001), and fill and overfill manifold (01-030) (SIN 99004).
(d)Remove the brackets (30-250 , 72-00-00) (SIN 0971J), (01-090 , 73-21-66) (SIN 9901U), and (05-100 , 73-21-66) (SIN 9901T).
* * * END SB   73-0060
Subtask 72-00-03-040-028
(2)Remove the bolts that attach the fill and overfill manifold to the drain manifold and right-side cable shield.
(3)Remove the bolts that attach the fill and overfill manifold to the drain manifold and left-side cable shield.
(4)Remove the fill and overfill manifold.
Subtask 72-00-03-040-020
D.Remove the left and right-side cable shields as follows:
(1)Remove the bolts that attach the left-side cable shield to the right-side cable shield.
(2)Remove the left and right-side cable shields from the U-shaped brackets on the drain manifold.
Subtask 72-00-03-040-021
E.Remove the forward bifurcation manifold (forward manifold) as follows:
(1)Remove the bolts that attach the forward manifold to the drain manifold and support brackets.
(2)Remove the forward manifold from the drain manifold.
Subtask 72-00-03-040-025
* * * SB   72-0035( Bifurcation Assembly with Insulation Blanket )
F.Remove the insulation blanket (01-360) (SIN 99090) from the forward manifold as follows:
NOTE:
PRE SB 72-0035 engines do not have the insulation blanket installed on the forward manifold.
(1)Open the snap button fasteners that connect the insulation blanket to the forward manifold.
(2)Remove the insulation blanket (01-360) (SIN 99090) from the forward manifold.
* * * END SB   72-0035
Subtask 72-00-03-040-022
* * * PRE SB   72-0223( Installation of Drain Manifold with Support Bracket )
G.Remove the lower bifurcation drain manifold (drain manifold) as follows:
(1)Remove the bolts that attach the drain manifold and support bracket to the drain mast.
(2)Remove the drain mast and support bracket from the drain manifold.
(3)Remove the drain manifold from the support brackets.
* * * END PRE SB   72-0223
Subtask 72-00-03-040-026
* * * SB   72-0223( Installation of Drain Manifold without Support Bracket )
G.A.Remove the drain manifold as follows:
(1)Remove the bolts that attach the drain manifold to the drain mast.
(2)Remove the drain mast from the drain manifold.
(3)Remove the drain manifold from the support brackets.
* * * END SB   72-0223
Subtask 72-00-03-040-024
H.Remove the support brackets (brackets) as follows:
(1)Remove the bolts that attach the support brackets to the left/right side cable shields, the drain manifold, and the forward manifold.
(2)Remove the bolts that attach a bracket to a different bracket.
(3)Remove the brackets.
Subtask 72-00-03-040-029
I.Remove the lower bifurcation manifold (SIN 99006). Refer to Figure 503 and do as follows:
(1)Remove the three bolts (10-310 , 79-22-10) (SIN 44422). Remove and discard the gasket (10-320 , 79-22-10) (SIN 44451).
(2)Remove the three bolts (10-220 , 79-22-10) (SIN 44024). Remove and discard the gasket (10-230 , 79-22-10) (SIN 44053).
(3)Remove the bolt (10-340 , 79-22-10) (SIN 9902D) attached to the clamp (10-350 , 79-22-10) (SIN 99085).
(4)Remove the two bolts (01-090 , 79-22-10) (SIN 44026).
(5)Disconnect the oil return tube (01-010 , 79-22-10) (SIN 44000).
(6)Remove the two bolts (10-220 , 79-22-10) (SIN 44924).
(7)Disconnect the air/oil cooler tube hose (ACOC tube) (05-050 , 79-22-10) (SIN 44900).
(8)Remove the bolts (25-250 , 72-00-00) (SIN 67126).
(9)Remove the five bolts (10-330 , 79-22-10) (SIN 99028).
(10)Remove the lower bifurcation manifold (SIN 99006).
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Figure 503   (Sheet 1 ) Removal of the Lower Bifurcation Manifold
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Figure 503   (Sheet 2 ) Removal of the Lower Bifurcation Manifold